CN110976794A - Process method for increasing thickness of amorphous alloy strip - Google Patents
Process method for increasing thickness of amorphous alloy strip Download PDFInfo
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- CN110976794A CN110976794A CN201911349486.9A CN201911349486A CN110976794A CN 110976794 A CN110976794 A CN 110976794A CN 201911349486 A CN201911349486 A CN 201911349486A CN 110976794 A CN110976794 A CN 110976794A
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- 229910000808 amorphous metal alloy Inorganic materials 0.000 title claims abstract description 217
- 238000000034 method Methods 0.000 title claims abstract description 86
- 230000008569 process Effects 0.000 title claims abstract description 44
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 284
- 238000001816 cooling Methods 0.000 claims abstract description 220
- 229910052742 iron Inorganic materials 0.000 claims abstract description 117
- 238000002360 preparation method Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000000956 alloy Substances 0.000 claims description 199
- 229910045601 alloy Inorganic materials 0.000 claims description 196
- 239000010949 copper Substances 0.000 claims description 128
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 127
- 229910052802 copper Inorganic materials 0.000 claims description 127
- 238000007711 solidification Methods 0.000 claims description 99
- 230000008023 solidification Effects 0.000 claims description 99
- 238000005266 casting Methods 0.000 claims description 86
- 239000000498 cooling water Substances 0.000 claims description 55
- 239000000155 melt Substances 0.000 claims description 51
- 238000013021 overheating Methods 0.000 claims description 12
- 241000227287 Elliottia pyroliflora Species 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 229910002546 FeCo Inorganic materials 0.000 claims description 3
- 229910002555 FeNi Inorganic materials 0.000 claims description 3
- 238000012625 in-situ measurement Methods 0.000 claims description 3
- 230000006872 improvement Effects 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 4
- 238000007712 rapid solidification Methods 0.000 abstract 1
- 238000004781 supercooling Methods 0.000 description 22
- 238000011065 in-situ storage Methods 0.000 description 12
- 239000007787 solid Substances 0.000 description 7
- 238000009749 continuous casting Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 238000012546 transfer Methods 0.000 description 5
- 230000009466 transformation Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/003—Making ferrous alloys making amorphous alloys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0611—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C45/00—Amorphous alloys
- C22C45/02—Amorphous alloys with iron as the major constituent
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Abstract
The invention relates to a process method for increasing the thickness of an iron-based amorphous alloy strip, which is characterized by comprising the following specific steps of: step 1, improving the cooling capacity of rapid cooling equipment; step 2, establishing a relation between the critical thickness of the iron-based amorphous alloy strip and the cooling capacity; and 3, preparing the iron-based amorphous alloy strip with the required thickness. The method can increase the thickness of the iron-based amorphous alloy strip by utilizing the process method for improving the cooling capacity of the cooling equipment under the condition of not changing the rapid solidification process condition, and reduce the preparation difficulty of the iron-based amorphous alloy thick strip. The method has the characteristics of low implementation cost, high efficiency, strong controllability and repeatability, high technical reliability and the like, and is suitable for wide application in the technical field of metal functional material preparation.
Description
Technical Field
The invention belongs to the technical field of preparation of metal functional materials, and particularly relates to a process method for increasing the thickness of an amorphous alloy strip.
Background
The Fe-based amorphous alloy has physical and chemical properties obviously different from those of crystalline Fe-based alloy, such as high magnetic conductivity, low loss, high hardness, corrosion resistance and the like, is an advanced electromagnetic material with excellent comprehensive properties, and is widely applied to multiple fields of smart power grids, smart manufacturing, information technology and the like. The thickness of the iron-based amorphous alloy strip is very thin, about 30 microns, the hardness is very high, the processing difficulty and the processing cost of the iron-based amorphous alloy strip are greatly increased, and meanwhile, the factor of an amorphous iron core lamination is also influenced due to the fact that the thickness of the iron-based amorphous alloy strip is too thin, so that the thickness of the iron-based amorphous alloy strip is increased, the processing difficulty and the processing cost are favorably reduced, and the lamination factor and the device performance of the amorphous iron core are improved.
The preparation of the alloy melt into the amorphous alloy strip is a supercooling solidification process of the alloy melt. To realize the supercooling solidification of the alloy melt, the melt state of the alloy is required to be kept below the amorphous structure transformation temperature Tg, and the viscosity of the alloy melt is rapidly increased, so that the melt loses fluidity, is solidified and is transformed into a solid with a melt structure. Taking an iron-based amorphous alloy as an example, because the amorphous structure transformation temperature Tg of an iron-based alloy melt is hundreds of degrees lower than the natural cooling solidification temperature of the alloy melt, the iron-based alloy melt generally cannot meet the requirement of supercooling solidification on the supercooling degree of the alloy melt. In order to realize the supercooling solidification of the iron-based alloy melt, a high-speed cooling method is required to be adopted for the alloy melt, so that the viscosity change of the alloy melt in the high-speed cooling process is obviously lagged behind the temperature change of the alloy melt, the supercooling degree of the alloy melt is artificially improved, the initial high-temperature melt structure is kept below the amorphous structure transformation temperature Tg, and the supercooling solidification of the alloy melt is realized.
The decreasing rate of the alloy melt temperature in the high-speed cooling process determines the amplitude of the supercooling degree of the alloy melt, and the faster the decreasing rate of the melt temperature is, the larger the supercooling degree of the alloy melt is. The key factor determining the rate of temperature drop of the alloy melt is the amount of heat transferred from the alloy melt per unit time, with the more heat transferred, the faster the melt temperature drops. The heat quantity transferred by the alloy melt in unit time is in direct proportion to the quantity of the alloy melt poured into the cooling system in unit time, and the larger the pouring quantity of the alloy melt in unit time is, the more the heat quantity needs to be led out, so that the constant cooling rate of the melt can be ensured. Under the condition that the cooling capacity of a cooling system is fixed, the increase of the casting quantity of the alloy melt in unit time inevitably leads to the reduction of the cooling rate of the melt, the more the quantity of the alloy melt cast in unit time is, the more the cooling rate of the alloy melt is reduced, the smaller the supercooling degree of the obtained alloy melt is, and the lower the forming capacity of the amorphous structure of the alloy melt is. When the supercooling degree of the alloy melt is smaller than the difference between the natural cooling solidification temperature of the iron-based alloy melt and the transformation temperature Tg of the amorphous structure, the melt state of the alloy cannot be kept below the transformation temperature Tg of the amorphous structure, the requirement of supercooling solidification cannot be met, and the melt is crystallized and solidified.
Since the thickness of the amorphous alloy strip is proportional to the amount of alloy melt cast per unit time, an increase in the thickness of the amorphous alloy strip necessarily results in a decrease in the degree of supercooling of the melt, i.e., a decrease in the ability of the melt to form an amorphous structure. Generally, the amorphous structure forming capability of the alloy melt is in direct proportion to the content of non-metallic elements in the alloy, and the amorphous structure forming capability of the alloy melt can be improved by increasing the content of the non-metallic elements.
Another method to improve the ability of the alloy melt to form an amorphous structure is to reduce the viscosity of the alloy melt during casting. Chinese patent application 201610872616.7 discloses a process for increasing the thickness of an amorphous alloy strip, which specifically comprises: step 1, establishing a correlation between overheating circulation treatment and alloy melt viscosity reduction; step 2, selecting a thermal cycle treatment temperature capable of reducing the viscosity of the alloy melt to the maximum extent and carrying out thermal treatment; and 3, reducing the temperature of the alloy melt after the overheating treatment to a set pouring temperature, and quickly solidifying to obtain the amorphous solid alloy thin strip. The method has the following main defects: the alloy melt is subjected to high temperature treatment at 1700 ℃, which easily causes the oxidation of metals in the melt.
In summary, although increasing the thickness of the amorphous alloy ribbon plays an important role in improving the performance and application of the amorphous alloy ribbon, an effective technical method for increasing the thickness of the amorphous alloy ribbon is still lacking, and is one of the key problems that cannot be solved in the field of the amorphous alloy material at present. Therefore, establishing a process method for increasing the thickness of the amorphous alloy strip is a key technology for meeting important amorphous alloy strip research and engineering production, and is also an important technology urgently needed for developing novel high-performance amorphous alloy materials.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a process method for increasing the thickness of an amorphous alloy strip.
In order to achieve the purpose, the invention adopts the following technical scheme:
a process method for increasing the thickness of an amorphous alloy strip sequentially comprises the following steps:
s1, improving the cooling capacity of the rapid cooling equipment;
s2, establishing a correlation between the critical thickness of the amorphous alloy strip and the cooling capacity of the rapid cooling equipment;
and S3, preparing the amorphous alloy strip with the required thickness according to the correlation obtained in the step S2.
As a preferred embodiment, step S1 includes the following sub-steps:
s1.1, preparing an amorphous alloy strip with a certain thickness from a certain alloy melt at a fixed casting temperature and under fixed cooling parameters, and measuring the solidification temperature of the alloy melt on a copper sleeve of a cooling roller as an original reference value for melt solidification;
s1.2, improving the cooling capacity of rapid cooling equipment by adopting a method of reducing the temperature of cooling water and/or reducing the thickness of a copper sleeve of a cooling rod, determining cooling parameters after the cooling capacity is improved, wherein the cooling parameters comprise the temperature of the cooling water and the thickness of the copper sleeve of the cooling rod, and then preparing an alloy melt into an amorphous alloy strip with the same thickness at the same casting temperature;
s1.3, measuring the solidification temperature of the alloy melt obtained in the substep S1.2, and determining that the cooling capacity of the rapid cooling equipment is improved when the measured solidification temperature of the melt is lower than the original comparison standard value obtained in the substep S1.1.
As a preferred embodiment, step S2 includes the following sub-steps:
s2.1, continuously casting the alloy melt onto a copper sleeve of a high-speed rotating quick cooling roller with the same cooling capacity and the same high-speed rotating quick cooling roller in the substep S1.2 of the step S1 through a nozzle at the same casting temperature by continuously increasing the casting amount of the alloy melt in unit time by adopting the cooling parameters established in the substep S1.2 of the step S1, rapidly solidifying the alloy melt into amorphous alloy strips with different thicknesses, and measuring the thickness of the strips;
s2.2, measuring the solidification temperature of the alloy melt on the copper sleeve of the corresponding high-speed rotating cooling rod obtained in the substep S2.1, wherein when the measured solidification temperature of the melt is very close to or equal to the original contrast standard value in the step S1, the maximum thickness of the amorphous alloy strip is the producible critical thickness.
As a preferred embodiment, step S3 includes the following sub-steps:
s3.1, selecting the thickness of the amorphous alloy strip to be prepared according to the maximum preparable thickness obtained in the substep S2.2, namely the critical thickness;
s3.2, melting the master alloy, performing overheating treatment, and then reducing the temperature to a set casting temperature;
s3.3, setting the melt casting amount according to the thickness selected in the substep S3.1, and then continuously casting the alloy melt obtained in the substep 3.2 onto a rapid cooling roller copper sleeve with the same cooling capacity and high-speed rotation as that of the rapid cooling roller copper sleeve in the substep S1.2 of the substep S1 through a nozzle, so as to rapidly solidify the alloy melt into an amorphous alloy thin strip with the required thickness;
and S3.4, measuring the solidification temperature of the alloy melt on the copper sleeve of the high-speed rotating cooling roller when the amorphous alloy strip is prepared in the substep S3.3.
Taking the preparation of the iron-based amorphous alloy strip as an example, the process method for increasing the thickness of the amorphous alloy strip provided by the invention sequentially comprises the following steps:
step 1, improving the cooling capacity of the rapid cooling equipment, comprising the following substeps:
1.1 when the temperature of cooling water is a first cooling water temperature and the thickness of a copper sleeve of a cooling roller is the thickness of the copper sleeve of the first cooling roller, preparing an alloy melt into an iron-based amorphous alloy strip with the first thickness at a fixed casting temperature, measuring the solidification temperature of the alloy melt on the copper sleeve of the cooling roller as a first solidification temperature, and taking the first solidification temperature as an original comparison standard value for solidification of the melt.
Namely, the maximum thickness of the amorphous strip which can be prepared at the normal casting temperature is taken as the first thickness, and the solidification temperature corresponding to the preparation of the thickest strip is taken as the first solidification temperature.
1.2, reducing the temperature of the cooling water to a second cooling water temperature and/or reducing the thickness of the copper sleeve of the cooling roller to the thickness of the copper sleeve of the second cooling roller, and preparing the alloy melt into the iron-based amorphous alloy strip with the first thickness at the same casting temperature as the step 1.1.
In other words, the substep improves the cooling capacity of the rapid cooling equipment by improving the heat conduction capacity of the cooling roller by adopting a method of reducing the temperature of the cooling water and/or reducing the thickness of the copper sleeve of the cooling roller, and prepares the alloy melt into the iron-based amorphous alloy strip with the same thickness at the same casting temperature under the condition of cooling parameters such as the temperature of the cooling water after the cooling capacity is improved, the thickness of the copper sleeve and the like.
1.3 measuring the solidification temperature of the alloy melt obtained in the substep 1.2, namely a second solidification temperature, and determining the increase of the cooling capacity of the rapid cooling equipment when the second solidification temperature is lower than the first solidification temperature;
step 2, obtaining the critical thickness of the iron-based amorphous alloy strip under the improved cooling capacity, and comprising the following substeps:
2.1 setting the temperature of cooling water as a second cooling water temperature, wherein the thickness of a copper sleeve of the cooling roller is the thickness of the copper sleeve of the second cooling roller, continuously pouring an alloy melt onto the copper sleeve of the cooling roller through a nozzle by continuously increasing the casting amount of the alloy melt in unit time at the same casting temperature, rapidly solidifying the alloy melt into a plurality of iron-based amorphous alloy strips with different thicknesses, namely preparing one strip for each thickness, and measuring the thickness of each strip;
in practice, the relation between the casting quantity per unit time and the thickness of the strip needs to be determined, and the added casting quantity is determined according to the melt flow control precision, if the flow control precision is 10 ml/s, the casting quantity added each time needs to be more than 10 ml/s, so that the actual accuracy can be ensured. The relationship between the casting amount per unit time and the thickness of the strip was determined by the surface linear velocity of the copper bush and the width of the strip, for example, the surface linear velocity of the copper bush was 25 m/s, the width of the strip was 200 mm, and when the casting amount was increased by 10 ml/s, the thickness of the strip was increased by 0.2 μm.
It is of course also possible to continuously pour the alloy melt through the nozzle onto the copper sleeve of the high-speed rotating rapid cooling roller with the same cooling capacity (same cooling parameter) as that in step 1.2 by continuously increasing the casting amount of the alloy melt in unit time, and rapidly solidify the alloy melt into amorphous alloy strips with different thicknesses, and simultaneously measure the thickness of the strips in real time; that is, only one strip of varying thickness is produced, and a certain amount of casting is increased every certain time, thereby increasing the strip thickness. The method is operated more conveniently.
2.2 measuring the solidification temperature of the corresponding alloy melt aiming at the iron-based amorphous alloy strips with different thicknesses obtained in the substep 2.1, wherein when the measured solidification temperature is very close to or equal to the first solidification temperature in the substep 1, the thickness of the iron-based amorphous alloy strip corresponding to the solidification temperature is the maximum thickness which can be prepared, namely the critical thickness;
step 3, preparing the iron-based amorphous alloy strip with the required thickness, comprising the following substeps:
3.1 selecting the thickness of the iron-based amorphous alloy strip to be prepared and the corresponding solidification temperature according to the obtained maximum preparable thickness (namely the critical thickness);
3.2 melting the iron-based master alloy to obtain an alloy melt, carrying out overheating treatment on the alloy melt, and then reducing the temperature to the set casting temperature (at the same casting temperature as that in the steps 1.1, 1.2 and 2.1);
3.3, setting the melt casting amount according to the thickness selected in the substep 3.1, and then continuously casting the alloy melt obtained in the step 3.2 onto a fast cooling roller copper sleeve rotating at a high speed through a nozzle, wherein the thickness of the cooling roller is the thickness of a second cooling roller copper sleeve, the temperature of cooling water is the temperature of the second cooling water, and the alloy melt is rapidly solidified into an iron-based amorphous alloy thin strip with the required thickness;
preferably, step 3 further comprises the sub-steps of:
3.4 in the substep 3.3, in-situ measuring the solidification temperature of the amorphous alloy melt on the copper sleeve of the high-speed rotating cooling roller when the iron-based amorphous alloy strip is prepared; in this way, it is possible to monitor in real time whether the solidification temperature of the alloy melt is the solidification temperature determined in step 3.1.
As a preferred embodiment, the material of the iron-based amorphous alloy strip is Fe-based amorphous alloy, FeNi-based amorphous alloy or FeCo-based amorphous alloy in an amorphous alloy system; more preferably, the material of the iron-based amorphous alloy strip is Fe80P2Si3B15Amorphous alloy or Fe80P1C1Si3B15And (3) amorphous alloy.
As a preferred embodiment, the measurement of the solidification temperature is performed in an in-situ measurement manner; more preferably, the measurement of the solidification temperature is performed using a laser infrared temperature measuring instrument.
As a preferred embodiment, the casting temperature is 1300-1400 ℃ (such as 1320 ℃, 1340 ℃, 1360 ℃, 1380 ℃) and preferably 1350 ℃.
In the above process method for increasing the thickness of the iron-based amorphous alloy strip, as a preferred embodiment, in the step 3 and the sub-step 3.2, the temperature of the overheating treatment is 1450-.
The invention also provides an amorphous alloy strip which is prepared according to the preparation method of the amorphous alloy strip.
According to the amorphous alloy strip, as a preferred embodiment, the thickness of the finally prepared amorphous alloy strip is greater than or equal to 40 micrometers.
According to the amorphous alloy strip, as a preferred embodiment, the bandwidth of the finally prepared amorphous alloy strip is 50-282 mm.
The realization principle of the invention is as follows: the supercooling degree of the casting melt in the high-speed cooling process is improved by reducing the thickness of the copper bush and the temperature of cooling water, the influence of the increase of the casting amount of the melt on the reduction of the supercooling degree of the melt is compensated, the amorphous structure forming capacity of the alloy melt is improved, and the purpose of increasing the thickness of the iron-based amorphous alloy strip is achieved.
Specifically, under the condition that the cooling capacity of the high-speed cooling equipment is not changed, the increase of the casting amount of the alloy melt means that the supercooling degree of the melt in the high-speed cooling process is reduced, and the cooling capacity of the cooling equipment must be increased to maintain the original supercooling degree of the melt while the casting amount of the alloy melt is increased. In the high-speed cooling process, the alloy melt firstly transfers heat to the copper sleeve of the cooling rod, and then the cooling water in the cooling rod takes away the heat transferred to the copper sleeve, so that the temperature on the surface of the copper sleeve is kept stable. Because the refrigerating capacity of the cooling equipment depends on the heat conduction speed of the copper sleeve of the cooling rod and the temperature of cooling water in the cooling rod, the refrigerating capacity of the cooling equipment can be improved by increasing the heat transfer speed of the copper sleeve of the cooling rod, the heat transfer speed of the copper sleeve of the cooling rod can be increased to transfer more heat out in unit time, and the refrigerating capacity can also be improved by reducing the temperature of the cooling water, the reduction of the temperature of the cooling water can ensure that more heat is exchanged between the copper sleeve and the cooling water in the copper sleeve, and because the quantity of heat exchanged between the copper sleeve and the cooling water in the cooling rod is inversely proportional to the temperature of the cooling water, the lower the temperature of the cooling water is, the larger the quantity of heat exchanged is. Within a certain thickness range, the heat conduction speed of the copper sleeve is inversely proportional to the thickness of the copper sleeve, and the thinner the copper sleeve is, the faster the heat conduction speed is, so that the heat conduction speed of the copper sleeve can be improved by reducing the thickness of the copper sleeve of the cooling rod. After the thickness of the copper sleeve is reduced, the heat transferred from the copper sleeve to the cooling water in unit time is increased, the cooling capacity of the cooling roller is improved, and the supercooling degree of the casting melt in the cooling process is increased. Similarly, the more heat the copper jacket transfers to the cooling water, the lower the temperature of the copper jacket itself, and the lower the temperature of the copper jacket, the lower the corresponding solidification temperature of the melt. Therefore, the method for reducing the thickness of the copper bush and the temperature of the cooling water can improve the cooling capacity of the cooling system and increase the supercooling degree of the melt during solidification. When the casting amount of the alloy melt is increased for increasing the thickness of the amorphous alloy strip, the cooling capacity of the cooling system can be improved by reducing the thickness of the copper bush and the temperature of cooling water, so that the melt can be kept at a proper supercooling degree, and the problem that the supercooling solidification requirement cannot be met due to the increase of the casting amount is solved. The thickness of the copper sleeve and the temperature of the cooling water can be reduced and can be used independently or jointly in the preparation of the amorphous alloy film, and the purpose of increasing the thickness of the amorphous alloy strip is achieved by improving the forming capacity of the amorphous structure of the melt in the rapid cooling process.
Compared with the prior art, the invention has the remarkable advantages that:
the invention provides a process method for increasing the thickness of an amorphous alloy strip, which creates a new concept and a new scheme for preparing the amorphous alloy strip with large thickness, in particular an iron-based amorphous alloy strip in the field.
Secondly), the invention is suitable for all alloy melts, and particularly can increase the thickness of the amorphous alloy strip under the condition of large fluctuation of the composition of the alloy melt.
Thirdly), the invention has the characteristics of simple and convenient implementation, high efficiency, low cost, strong controllability and repeatability, high technical reliability and the like, and is suitable for wide application in the technical field of metal functional material preparation.
Drawings
FIG. 1 is a schematic flow chart of a process for increasing the thickness of an iron-based amorphous alloy strip according to the present invention.
FIG. 2 shows the thickness of 40 μm Fe photographed by transmission electron microscope in example 1 of the present invention80P2Si3B15Schematic representation of high resolution images of amorphous alloy ribbon, shown only as amorphous structural features in fig. 2.
FIG. 3 shows that in example 2 of the present invention, Fe with a thickness of 40 μm is photographed by a transmission electron microscope80P1C1Si3B15Schematic representation of high resolution image of amorphous alloy ribbon, shown only as amorphous structural features in fig. 3.
FIG. 4 shows that the thickness of Fe in example 3 is 38 μm by transmission electron microscope80P2Si3B15Schematic representation of high resolution images of amorphous alloy ribbon, showing only amorphous structural features.
FIG. 5 shows that in example 4 of the present invention, Fe with a thickness of 35 μm is photographed by a transmission electron microscope80P2Si3B15Schematic representation of high resolution images of amorphous alloy ribbon, showing only amorphous structural features.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, in a preferred embodiment of the process for controlling the thickness of the amorphous alloy strip provided by the present invention, taking the preparation of the iron-based amorphous alloy strip as an example, the process sequentially includes the following specific steps:
step 1, improving the cooling capacity of the rapid cooling equipment, comprising the following substeps: 1.1 preparing an alloy melt into an iron-based amorphous alloy strip, and measuring the solidification temperature of the alloy melt on a copper sleeve of a cooling roller in situ by adopting a laser infrared temperature measuring instrument to serve as an original comparison standard value for solidification of the melt; 1.2 singly adopting a method of reducing the temperature of cooling water or singly adopting a method of reducing the thickness of a copper sleeve of a cooling roller to improve the cooling capacity of the cooling roller, or jointly using the two methods to improve the cooling capacity of the cooling roller, and preparing an alloy melt into an iron-based amorphous alloy strip with the same thickness at the same casting temperature; 1.3, measuring the solidification temperature of the alloy melt on the copper sleeve of the cooling roller in situ by adopting a laser infrared temperature measuring instrument, and determining the improvement of the cooling capacity when the measured solidification temperature of the melt is lower than an original comparison standard value;
step 2, obtaining the critical thickness of the iron-based amorphous alloy strip under the improved cooling capacity, and establishing the relationship between different cooling capacities (cooling parameters) and the critical thickness of the iron-based amorphous alloy strip, wherein the method comprises the following substeps: 2.1 under the same casting temperature and cooling capacity and under the same conditions as the substep 1.2 of the step 1, continuously casting the alloy melt on a copper sleeve of a quick cooling roller rotating at high speed through a nozzle by adopting the alloy melt casting amount of continuously increasing unit time, quickly solidifying the alloy melt into iron-based amorphous alloy strips with different thicknesses, and measuring the thickness of the iron-based amorphous alloy strips; 2.2 measuring the solidification temperature of the alloy melt on the copper sleeve of the high-speed rotating cooling rod in situ by adopting a laser infrared temperature measuring instrument, wherein when the measured solidification temperature of the melt is very close to or equal to an original comparison standard value, the maximum thickness of the iron-based amorphous alloy strip is the prepared critical thickness;
step 3, preparing the iron-based amorphous alloy strip with the required thickness, comprising the following substeps: 3.1 selecting the thickness of the iron-based amorphous alloy strip to be prepared according to the obtained maximum preparable thickness; 3.2 melting the iron-based master alloy, carrying out overheating treatment on the alloy melt at 1450 ℃, and then reducing to a set casting temperature (the casting temperature is the same as that in the step 1 and the step 2); 3.3 setting the melt casting amount according to the selected thickness, and then continuously casting the alloy melt onto a fast cooling roller copper sleeve rotating at high speed through a nozzle under the same cooling capacity as that of the substep 1.2 of the step 1, so as to rapidly solidify the alloy melt into an iron-based amorphous alloy thin strip with the required thickness; 3.4 when preparing the iron-based amorphous alloy strip, measuring the solidification temperature of the amorphous alloy melt on the copper sleeve of the high-speed rotating cooling roller in situ by using a laser infrared thermometer.
The further preferred scheme is as follows: the casting amount of the alloy melt is determined according to the thickness of the amorphous alloy strip to be prepared; the shape of the amorphous alloy is a thin strip; the amorphous alloy thin strip is made of Fe base, FeNi base and FeCo base in an amorphous alloy system; the thickness of the iron-based amorphous alloy strip is 40 micrometers, and the bandwidth is 50-282 millimeters.
In the process method for regulating and controlling the thickness of the amorphous alloy strip, the casting temperature and the linear speed of the cooling roller are kept consistent in each step.
The specific embodiment of the process method for increasing the thickness of the amorphous alloy strip provided by the invention is as follows:
example 1:
to use Fe80P2Si3B15For example, thin amorphous alloy ribbons, where the subscript numbers in the formula are at% (i.e., atomic number percent), are prepared by high-speed planar flow casting methods commonly used in the art. The specific operation steps of the process method for increasing the thickness of the iron-based amorphous alloy strip provided by the invention are as follows:
step 1, improving the cooling capacity of the rapid cooling equipment:
(1.1) selection of Fe80P2Si3B15Casting temperature of the alloy melt is 1350 ℃, under the conditions that the thickness of a copper sleeve of a cooling roller is 32 MM, the temperature of cooling water is 21 ℃ and the linear velocity of the surface of the copper sleeve is 25 m/s, the alloy melt is prepared into an iron-based amorphous alloy strip with the thickness of 29 microns, and a laser infrared temperature measuring instrument (model: Marathon MM) is adopted to measure Fe on the copper sleeve of the high-speed rotating cooling roller80P2Si3B15The solidification temperature of the alloy melt is 400 ℃, and the alloy melt is used as an original comparison standard value for melt solidification;
(1.2) first, the thickness of the copper sleeve of the chill roll was reduced to 20 mm, the temperature of the chill water was reduced to 12 ℃, and then Fe was cast at 1350 ℃ and the linear velocity of the copper sleeve surface at 25 m/s at the same casting temperature80P2Si3B15Preparing the alloy melt into an iron-based amorphous alloy strip with the same thickness of 29 microns;
(1.3) measurement of the high-speed rotating Cooling Rollers Using a laser Infrared temperature measuring apparatus (model: Marathon MM)Fe on copper80P2Si3B15The solidification temperature of the alloy melt is 340 ℃, and the cooling capacity is improved compared with the original comparison standard value;
step 2, obtaining the critical thickness of the iron-based amorphous alloy strip under the improved cooling capacity:
the purpose of the step is to find the maximum thickness of the iron-based amorphous alloy strip which can be prepared under the condition of improving the cooling capacity. The solidification temperature required for converting the melt into the amorphous alloy is determined in the last step, and whether the amorphous alloy is formed can be judged by measuring the solidification temperature of the melt in the step.
(2.1) under the conditions that the thickness of a copper sleeve of a cooling roller is 20 mm, the temperature of cooling water is reduced to 12 ℃ and the same casting temperature is 1350 ℃, adopting the alloy melt casting amount of continuously increasing unit time to carry out Fe80P2Si3B15Continuously pouring the alloy melt onto a copper sleeve of a rapid cooling roller rotating at a high speed through a nozzle, wherein the linear velocity of the surface of the copper sleeve is 25 m/s, rapidly solidifying the alloy melt into iron-based amorphous alloy strips with different thicknesses, and measuring the thickness of the iron-based amorphous alloy strips;
(2.2) measuring the solidification temperature of the alloy melt on the copper sleeve of the high-speed rotating cooling roller in situ by adopting a laser infrared temperature measuring instrument (model: Marathon MM), wherein when the measured solidification temperature of the melt is 398 ℃, the measured solidification temperature of the melt is very close to an original comparison standard value (400 ℃), and the maximum thickness of the measured iron-based amorphous alloy strip is 40 micrometers, namely the critical thickness is 40 micrometers;
step 3, preparing the iron-based amorphous alloy strip with the required thickness:
(3.1) selecting the thickness of the iron-based amorphous alloy strip to be prepared to be 40 microns according to the obtained maximum preparable thickness;
(3.2) adding Fe80P2Si3B15After the iron-based master alloy is melted, raising the temperature to 1450 ℃, carrying out overheating treatment on the alloy melt for 1 hour at 1450 ℃, and then lowering the temperature to 1350 ℃ which is set;
(3.3) under the conditions that the thickness of a copper sleeve of a cooling roll is 20 mm and the temperature of cooling water is 12 ℃, the melt casting amount is set to be 2961 ml/s according to the thickness of the selected strip, then the alloy melt is continuously cast onto a fast cooling roll copper sleeve rotating at high speed through a nozzle, the linear speed of the surface of the copper sleeve is 25 m/s, and the alloy melt is rapidly solidified into an iron-based amorphous alloy strip with the required thickness of 40 microns and the width of 282 mm. In order to ensure that the prepared amorphous solid alloy thin strip has uniform thickness, the accurate detection and real-time control of the alloy melt temperature, the high-precision roller nozzle spacing monitoring and the high-precision closed-loop control of the cooling roller rotating speed are required in the high-speed plane flow continuous casting process;
(3.4) when the iron-based amorphous alloy strip is prepared, the solidification temperature of the amorphous alloy melt on the high-speed rotating cooling copper roller is 398 ℃ through in-situ measurement by a laser infrared thermometer.
The amorphous alloy Fe obtained by the steps80P2Si3B15The schematic diagram of the high-resolution image of the microstructure of the thin strip is shown in fig. 2, wherein the structural feature shown is an amorphous disordered structure, and no crystalline structural feature appears, which shows that the invention can improve the amorphous structure forming capability of the alloy melt and increase the thickness of the amorphous alloy strip, and the thickness can be increased from 29 micrometers to 40 micrometers.
Example 2:
to use Fe80P1C1Si3B15The amorphous alloy thin strip is taken as an example, subscript numbers in the chemical formula are at%, and the amorphous alloy thin strip is prepared by adopting a high-speed planar flow continuous casting method commonly used in the field. The specific operation steps of the process method for increasing the thickness of the iron-based amorphous alloy strip provided by the invention are as follows:
step 1, improving the cooling capacity of the rapid cooling equipment:
(1.1) selection of Fe80P1C1Si3B15Casting the alloy melt at 1350 deg.c, cooling the alloy melt in a cooling copper rod at 32 mm thickness, cooling water at 21 deg.c and copper bush surface at linear speed of 25 m/s to form 29 micron thick Fe-base amorphous alloy strip, and measuring the temperature with laser infrared rayInstrument (model: Marathon MM) for measuring Fe on copper sleeve of high-speed rotating cooling rod80P1C1Si3B15The solidification temperature of the alloy melt is 399 ℃, and the alloy melt is used as an original comparison standard value for the solidification of the melt;
(1.2) first, the thickness of the copper sleeve of the chill roll was reduced to 20 mm, the temperature of the chill water was reduced to 12 ℃, and then Fe was cast at 1350 ℃ and the linear velocity of the copper sleeve surface at 25 m/s at the same casting temperature80P1C1Si3B15Preparing the alloy melt into an iron-based amorphous alloy strip with the same thickness of 29 microns;
(1.3) measuring Fe on the copper sleeve of the high-speed rotating cooling rod by adopting a laser infrared temperature measuring instrument (model: Marathon MM)80P1C1Si3B15The solidification temperature of the alloy melt is 340 ℃, and the cooling capacity is improved compared with the original comparison standard value;
step 2, obtaining the critical thickness of the iron-based amorphous alloy strip under the improved cooling capacity:
(2.1) casting Fe by adopting the alloy melt casting amount of continuously increasing unit time at the cooling water temperature of 12 ℃, the cooling roller copper sleeve thickness of 20 mm and the same casting temperature of 1350 DEG C80P1C1Si3B15Continuously pouring the alloy melt onto a copper sleeve of a rapid cooling roller rotating at a high speed through a nozzle, wherein the linear velocity of the surface of the copper sleeve is 25 m/s, rapidly solidifying the alloy melt into iron-based amorphous alloy strips with different thicknesses, and measuring the thickness of the iron-based amorphous alloy strips;
(2.2) measuring the solidification temperature of the alloy melt on the copper sleeve of the high-speed rotating cooling rod in situ by adopting a laser infrared temperature measuring instrument (model: Marathon MM), wherein when the measured solidification temperature of the melt is 397 ℃, the measured solidification temperature of the melt is very close to an original contrast standard value (399 ℃), and the maximum thickness of the measured iron-based amorphous alloy strip is 40 micrometers, namely the critical thickness is 40 micrometers;
step 3, preparing the iron-based amorphous alloy strip with the required thickness:
(3.1) selecting the thickness of the iron-based amorphous alloy strip to be prepared to be 40 microns according to the obtained maximum preparable thickness;
(3.2) adding Fe80P1C1Si3B15After the iron-based master alloy is melted, raising the temperature to 1450 ℃, carrying out overheating treatment on the alloy melt for 1 hour at 1450 ℃, and then lowering the temperature to 1350 ℃ which is set;
(3.3) under the conditions that the thickness of a copper sleeve of a cooling roll is 20 mm and the temperature of cooling water is 12 ℃, according to the selected thickness of a strip to be prepared, the melt casting amount is set to be 500 ml/s, and then the alloy melt is continuously cast onto a fast cooling roll copper sleeve rotating at a high speed through a nozzle, the linear velocity of the surface of the copper sleeve is 25 m/s, and the alloy melt is rapidly solidified into an iron-based amorphous alloy strip with the required thickness of 40 microns and the width of 50 mm. In order to ensure that the prepared amorphous solid alloy thin strip has uniform thickness, the accurate detection and real-time control of the alloy melt temperature, the high-precision roller nozzle spacing monitoring and the high-precision closed-loop control of the cooling roller rotating speed are required in the high-speed plane flow continuous casting process;
(3.4) when the iron-based amorphous alloy strip is prepared, the solidification temperature of the amorphous alloy melt on the copper sleeve of the high-speed rotating cooling roller is measured in situ by a laser infrared thermometer to be 399 ℃.
The amorphous alloy Fe obtained by the steps80P1C1Si3B15The schematic diagram of the high-resolution image of the microstructure of the thin strip is shown in fig. 3, wherein the structural feature shown is an amorphous disordered structure, and no crystalline structural feature appears, which shows that the invention can improve the amorphous structure forming capability of the alloy melt and increase the thickness of the amorphous alloy strip, and the thickness can be increased from 29 micrometers to 40 micrometers.
Example 3:
to use Fe80P2Si3B15The amorphous alloy thin strip is taken as an example, subscript numbers in the chemical formula are at%, and the amorphous alloy thin strip is prepared by adopting a high-speed planar flow continuous casting method commonly used in the field. The specific operation steps of the process method for increasing the thickness of the iron-based amorphous alloy strip provided by the invention are as follows:
step 1, improving the cooling capacity of the rapid cooling equipment:
(1.1) selection of Fe80P2Si3B15Casting temperature of the alloy melt is 1350 ℃, under the conditions that the thickness of a cooling copper rod is 32 MM, the temperature of cooling water is 21 ℃ and the linear velocity of the surface of the copper sleeve is 25 m/s, the alloy melt is prepared into an iron-based amorphous alloy strip with the thickness of 29 microns, and a laser infrared temperature measuring instrument (model: Marathon MM) is adopted to measure Fe on the copper sleeve of the high-speed rotating cooling rod80P2Si3B15The solidification temperature of the alloy melt is 400 ℃, and the alloy melt is used as an original comparison standard value for melt solidification;
(1.2) first, the temperature of the cooling water was lowered to 12 ℃ and the thickness of the cooled copper rod was still 32 mm, and then Fe was cast at 1350 ℃ and the surface linear velocity of the copper sleeve was 25 m/s80P2Si3B15Preparing the alloy melt into an iron-based amorphous alloy strip with the same thickness of 29 microns;
(1.3) measuring Fe on the copper sleeve of the high-speed rotating cooling rod by adopting a laser infrared temperature measuring instrument (model: Marathon MM)80P2Si3B15The solidification temperature of the alloy melt is 360 ℃, and the cooling capacity is improved compared with the original comparison standard value;
step 2, obtaining the critical thickness of the iron-based amorphous alloy strip under the improved cooling capacity:
(2.1) casting Fe by continuously increasing the alloy melt casting amount per unit time at the cooling water temperature of 12 ℃, the cooling copper rod thickness of 32 mm and the same casting temperature of 1350 DEG C80P2Si3B15Continuously pouring the alloy melt onto a copper sleeve of a rapid cooling roller rotating at a high speed through a nozzle, wherein the linear velocity of the surface of the copper sleeve is 25 m/s, rapidly solidifying the alloy melt into iron-based amorphous alloy strips with different thicknesses, and measuring the thickness of the iron-based amorphous alloy strips;
(2.2) measuring the solidification temperature of the alloy melt on the copper sleeve of the high-speed rotating cooling rod in situ by adopting a laser infrared temperature measuring instrument (model: Marathon MM), wherein when the measured solidification temperature of the melt is 399 ℃, the measured solidification temperature of the melt is very close to an original comparison standard value (400 ℃), and the maximum thickness of the measured iron-based amorphous alloy strip is 38 micrometers, namely the critical thickness is 38 micrometers;
step 3, preparing the iron-based amorphous alloy strip with the required thickness:
(3.1) selecting the thickness of the iron-based amorphous alloy strip to be prepared to be 38 microns according to the obtained maximum preparable thickness;
(3.2) adding Fe80P2Si3B15After the iron-based master alloy is melted, raising the temperature to 1450 ℃, carrying out overheating treatment on the alloy melt for 1 hour at 1450 ℃, and then lowering the temperature to 1350 ℃ which is set;
(3.3) the melt casting amount was set to 1339.5 ml/s in accordance with the selected thickness of the strip under the conditions that the thickness of the chill roll copper jacket was 32 mm and the temperature of the cooling water was 12 ℃, and then the alloy melt was continuously cast onto the rapidly cooling roll copper jacket rotating at a high speed through a nozzle, the linear velocity of the surface of the copper jacket was 25 m/s, and the alloy melt was rapidly solidified into an iron-based amorphous alloy strip having a desired thickness of 38 μm and a width of 141 mm. In order to ensure that the prepared amorphous solid alloy thin strip has uniform thickness, the accurate detection and real-time control of the alloy melt temperature, the high-precision roller nozzle spacing monitoring and the high-precision closed-loop control of the cooling roller rotating speed are required in the high-speed plane flow continuous casting process;
(3.4) when the iron-based amorphous alloy strip is prepared, the solidification temperature of the amorphous alloy melt on the copper sleeve of the high-speed rotating cooling roller is measured in situ by a laser infrared thermometer to be 399 ℃.
The amorphous alloy Fe obtained by the steps80P2Si3B15The high resolution image of the thin strip microstructure is schematically shown in fig. 4, wherein the structural feature shown is an amorphous disordered structure, and no crystalline structural feature appears, which indicates that the invention can improve the amorphous structure forming capability of the alloy melt and increase the thickness of the amorphous alloy strip, and the thickness of the iron-based amorphous alloy strip can be increased from 29 microns to 38 microns.
Example 4:
to use Fe80P2Si3B15Amorphous formFor example, the subscript number in the chemical formula is at%, and the amorphous solid alloy thin strip is prepared by a high-speed planar flow casting method commonly used in the art. The specific operation steps of the process method for increasing the thickness of the iron-based amorphous alloy strip provided by the invention are as follows:
step 1, improving the cooling capacity of the rapid cooling equipment:
(1.1) selection of Fe80P2Si3B15Casting temperature of the alloy melt is 1350 ℃, under the conditions that the thickness of a cooling copper rod is 32 MM, the temperature of cooling water is 21 ℃ and the linear velocity of the surface of the copper sleeve is 25 m/s, the alloy melt is prepared into an iron-based amorphous alloy strip with the thickness of 29 microns, and a laser infrared temperature measuring instrument (model: Marathon MM) is adopted to measure Fe on the copper sleeve of the high-speed rotating cooling rod80P2Si3B15The solidification temperature of the alloy melt is 400 ℃, and the alloy melt is used as an original comparison standard value for melt solidification;
(1.2) first, the thickness of the copper sleeve of the cooling rod is reduced to 20 mm, the temperature of the cooling water is still 21 ℃, and then Fe is cast at the same casting temperature of 1350 ℃ and the surface linear speed of the copper sleeve of 25 m/s80P2Si3B15Preparing the alloy melt into an iron-based amorphous alloy strip with the same thickness of 29 microns;
(1.3) measuring Fe on the high-speed rotating copper rod by using a laser infrared temperature measuring instrument (model: Marathon MM)80P2Si3B15The solidification temperature of the alloy melt is 375 ℃, and the cooling capacity is improved compared with the original comparison standard value;
step 2, obtaining the critical thickness of the iron-based amorphous alloy strip under the improved cooling capacity:
(2.1) under the conditions that the thickness of the copper sleeve of the cooling rod is 20 mm, the temperature of the cooling water is 21 ℃ and the same casting temperature is 1350 ℃, adopting the alloy melt casting amount of continuously increasing unit time to carry out Fe80P2Si3B15The alloy melt is continuously poured onto a rapidly cooling roller copper sleeve rotating at high speed through a nozzle, the linear speed of the surface of the copper sleeve is 25 m/s, and the alloy melt is rapidly poured onto the rapidly cooling roller copper sleeveQuickly solidifying the alloy into iron-based amorphous alloy strips with different thicknesses, and measuring the thickness of the iron-based amorphous alloy strips;
(2.2) measuring the solidification temperature of the alloy melt on the copper sleeve of the high-speed rotating rod in situ by adopting a laser infrared temperature measuring instrument (model: Marathon MM), wherein when the measured solidification temperature of the melt is 398 ℃, the measured solidification temperature is very close to an original comparison standard value (400 ℃), and the maximum thickness of the measured iron-based amorphous alloy strip is 35 microns, namely the critical thickness is 35 microns;
step 3, preparing the iron-based amorphous alloy strip with the required thickness:
(3.1) selecting the thickness of the iron-based amorphous alloy strip to be prepared to be 35 microns according to the obtained maximum preparable thickness;
(3.2) adding Fe80P2Si3B15After the iron-based master alloy is melted, raising the temperature to 1450 ℃, carrying out overheating treatment on the alloy melt for 1 hour at 1450 ℃, and then lowering the temperature to 1350 ℃ which is set;
(3.3) under the conditions that the thickness of the copper sleeve of the cooling roll is 20 mm and the temperature of the cooling water is reduced to 21 ℃, the melt casting amount is set to 525 ml/s according to the thickness of the selected strip, then the alloy melt is continuously cast onto the copper sleeve of the rapid cooling roll rotating at high speed through a nozzle, the linear velocity of the surface of the copper sleeve is 25 m/s, and the alloy melt is rapidly solidified into the iron-based amorphous alloy strip with the required thickness of 42 microns and the width of 50 mm. In order to ensure that the prepared amorphous solid alloy thin strip has uniform thickness, the accurate detection and real-time control of the alloy melt temperature, the high-precision roller nozzle spacing monitoring and the high-precision closed-loop control of the cooling roller rotating speed are required in the high-speed plane flow continuous casting process;
(3.4) when the iron-based amorphous alloy strip is prepared, the solidification temperature of the amorphous alloy melt on the copper sleeve of the high-speed rotating cooling roller is measured to be 395 ℃ by a laser infrared thermometer in situ.
The amorphous alloy Fe obtained by the steps80P2Si3B15A schematic representation of a high resolution image of a thin ribbon microstructure is shown in FIG. 5, wherein the structural features shown are amorphous disordered structures without crystalline structuresThe method has the advantages that the amorphous structure forming capacity of the alloy melt can be improved, the thickness of the amorphous alloy strip can be increased, and the thickness of the iron-based amorphous alloy strip can be increased from 29 micrometers to 35 micrometers.
Comparing the example 1 with the example 2, the method for increasing the thickness of the amorphous alloy strip of the invention can be used for Fe80P2Si3B15Amorphous alloy and Fe80P1C1Si3B15The amorphous alloy is suitable for use and has similar effect, and the method of the invention can be suitable for different amorphous alloys and has good applicability.
It can be seen from the comparison of examples 1, 3 and 4 that the measured solidification temperature of the melt is close to the original value under the condition that other operation conditions are basically parallel or completely the same, so as to ensure that the maximum thickness of the iron-based amorphous alloy strip without reducing the supercooling degree is obtained.
Example 3 cooling water temperature was reduced from 21 ℃ to 12 ℃ and the maximum fe-based amorphous alloy ribbon thickness was increased from 29 to 38 microns; example 4 the thickness of the copper jacket of the cooling roller is reduced from 32 mm to 20 mm, and the thickness of the maximum iron-based amorphous alloy strip is increased from 29 microns to 35 microns; example 1 simultaneously reducing the temperature of cooling water from 21 ℃ to 12 ℃, reducing the thickness of a copper sleeve of a cooling roller from 32 mm to 20 mm, and increasing the thickness of a maximum iron-based amorphous alloy strip from 29 microns to 40 microns; this shows that the reduction of the temperature of the cooling water and the reduction of the thickness of the copper sleeve of the cooling roller can synergistically play a role in increasing the thickness of the iron-based amorphous alloy strip.
In conclusion, the process method for regulating the thickness of the iron-based amorphous alloy strip provided by the invention can regulate the thickness of the amorphous alloy strip on the premise of ensuring the quality of the amorphous alloy thin strip, so that the high-quality iron-based amorphous alloy thick strip is obtained, and the process method is suitable for different amorphous alloy material systems.
The invention obtains satisfactory trial effect through repeated test verification.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (10)
1. A process method for increasing the thickness of an amorphous alloy strip sequentially comprises the following steps:
s1, improving the cooling capacity of the rapid cooling equipment;
s2, obtaining the critical thickness of the iron-based amorphous alloy strip under the improved cooling capacity, and establishing the incidence relation between the critical thickness of the amorphous alloy strip and the cooling capacity of the rapid cooling equipment;
and S3, preparing the amorphous alloy strip with the required thickness according to the correlation obtained in the step S2.
2. The process of claim 1, step S1 comprising the sub-steps of:
s1.1, preparing an alloy melt into an amorphous alloy strip with a certain thickness under the conditions of fixed casting temperature and fixed cooling parameters including cooling water temperature and cooling roller copper bush thickness, and measuring the solidification temperature of the alloy melt on a cooling roller copper bush as an original comparison standard value of melt solidification;
s1.2, improving the cooling capacity of rapid cooling equipment by adopting a method of reducing the temperature of cooling water and/or reducing the thickness of a copper sleeve of a cooling rod, determining cooling parameters after the cooling capacity is improved, wherein the cooling parameters comprise the temperature of the cooling water and the thickness of the copper sleeve of the cooling rod, and then preparing an alloy melt into an amorphous alloy strip with the same thickness at the same casting temperature;
s1.3, measuring the solidification temperature of the alloy melt obtained in the substep S1.2, and determining that the cooling capacity of the rapid cooling equipment is improved when the measured solidification temperature of the melt is lower than the original comparison standard value obtained in the substep S1.1.
3. The process of claim 2, step S2 comprising the sub-steps of:
s2.1, continuously casting the alloy melt to a copper sleeve of a high-speed rotating quick cooling roller with the same cooling capacity and the same high-speed rotating quick cooling roller in the substep S1.2 of the step S1 through a nozzle at the same casting temperature by continuously increasing the casting amount of the alloy melt in unit time by adopting the cooling parameters established in the substep S1.2 of the step S1, rapidly solidifying the alloy melt into amorphous alloy strips with different thicknesses, and simultaneously measuring the thickness of the strips; or continuously pouring the alloy melt onto a copper sleeve of a high-speed rotating quick cooling roller with the cooling capacity same as that in the step 1.2 through a nozzle by continuously increasing the casting amount of the alloy melt in unit time, rapidly solidifying the alloy melt into an amorphous alloy strip with different thicknesses, and simultaneously measuring the thickness of the strip in real time;
s2.2, measuring the solidification temperature of the alloy melt on the copper sleeve of the corresponding high-speed rotating cooling rod obtained in the substep S2.1, wherein when the measured solidification temperature of the melt is very close to or equal to the original contrast standard value in the step S1, the maximum thickness of the amorphous alloy strip is the producible critical thickness.
4. The process of claim 3, step S3 comprising the sub-steps of:
s3.1, selecting the thickness of the amorphous alloy strip to be prepared according to the critical thickness obtained in the substep S2.2;
s3.2, after the master alloy is melted, carrying out overheating treatment, and then reducing the temperature to a set casting temperature to obtain an alloy melt;
s3.3, setting the melt casting amount according to the thickness selected in the substep S3.1, and then continuously casting the alloy melt obtained in the substep 3.2 onto a rapid cooling roller copper sleeve with the same cooling capacity and high-speed rotation as that of the rapid cooling roller copper sleeve in the substep S1.2 of the substep S1 through a nozzle, so as to rapidly solidify the alloy melt into an amorphous alloy thin strip with the required thickness;
and S3.4, measuring the solidification temperature of the alloy melt on the copper sleeve of the high-speed rotating cooling roller when the amorphous alloy strip is prepared in the substep S3.3.
5. The process of claim 1, comprising the steps of, in order:
step 1, improving the cooling capacity of the rapid cooling equipment, comprising the following substeps:
1.1, when the temperature of cooling water is first cooling water temperature and the thickness of a copper sleeve of a cooling roller is first cooling roller copper sleeve thickness, preparing an alloy melt into an iron-based amorphous alloy strip with the first thickness at a fixed casting temperature, measuring the solidification temperature of the alloy melt on the copper sleeve of the cooling roller as a first solidification temperature, and taking the first solidification temperature as an original comparison standard value for solidification of the melt;
1.2, reducing the temperature of cooling water to a second temperature of cooling water, and/or reducing the thickness of a copper sleeve of a cooling roller to the thickness of the copper sleeve of the second cooling roller, and preparing the alloy melt into an iron-based amorphous alloy strip with the first thickness at the same casting temperature as that in the step 1.1;
1.3, measuring the solidification temperature of the alloy melt obtained in the substep 1.2, namely a second solidification temperature, and determining the improvement of the cooling capacity of the rapid cooling equipment when the second solidification temperature is lower than the first solidification temperature;
step 2, obtaining the critical thickness of the iron-based amorphous alloy strip under the improved cooling capacity, and comprising the following substeps:
2.1, setting the temperature of cooling water as second cooling water temperature, setting the thickness of a copper sleeve of a cooling roller as the thickness of the copper sleeve of the second cooling roller, continuously pouring an alloy melt onto the same copper sleeve of the cooling roller with the cooling capacity and the same cooling capacity in the step 1.2 through a nozzle at the same casting temperature by continuously increasing the casting amount of the alloy melt in unit time, rapidly solidifying the alloy melt into a plurality of iron-based amorphous alloy strips with different thicknesses, and measuring the thickness of each strip; or continuously pouring the alloy melt onto a copper sleeve of a high-speed rotating quick cooling roller with the cooling capacity same as that in the step 1.2 through a nozzle by continuously increasing the casting amount of the alloy melt in unit time, rapidly solidifying the alloy melt into an amorphous alloy strip with different thicknesses, and simultaneously measuring the thickness of the strip in real time;
2.2, measuring the solidification temperature of the corresponding alloy melt aiming at the iron-based amorphous alloy strips with different thicknesses obtained in the substep 2.1, wherein when the measured solidification temperature is very close to or equal to the first solidification temperature in the substep 1, the thickness of the iron-based amorphous alloy strip corresponding to the solidification temperature is critical thickness;
step 3, preparing the iron-based amorphous alloy strip with the required thickness, comprising the following substeps:
3.1, selecting the thickness of the iron-based amorphous alloy strip to be prepared and the corresponding solidification temperature according to the obtained critical thickness;
3.2 melting the iron-based master alloy to obtain an alloy melt, carrying out overheating treatment on the alloy melt, and then reducing the temperature to the set casting temperature which is the same as that in the step 1.1;
3.3 setting the melt casting amount according to the thickness selected in the substep 3.1, and then continuously casting the alloy melt obtained in the step 3.2 onto a fast cooling roller copper sleeve rotating at a high speed through a nozzle, wherein the thickness of the cooling roller is the thickness of the second cooling roller copper sleeve, the temperature of the cooling water is the temperature of the second cooling water, and the alloy melt is rapidly solidified into an iron-based amorphous alloy thin strip with the required thickness.
6. The process of claim 5, step 3 further comprising the sub-steps of:
3.4, measuring the solidification temperature of the amorphous alloy melt on the copper sleeve of the high-speed rotating cooling roller when the iron-based amorphous alloy strip is prepared in the substep 3.3.
7. The process of any one of claims 1 to 6, wherein the measurement of the solidification temperature is measured by in situ measurement; more preferably, the measurement of the solidification temperature is performed using a laser infrared temperature measuring instrument.
8. The process method of any one of claims 1 to 7, wherein the Fe-based amorphous alloy strip is made of Fe-based amorphous alloy, FeNi-based amorphous alloy or FeCo-based amorphous alloy in an amorphous alloy system; preferably, the material of the iron-based amorphous alloy strip is Fe80P2Si3B15Amorphous alloy or Fe80P1C1Si3B15Amorphous alloy;
preferably, the casting temperature is 1300-;
preferably, the temperature of the superheating treatment is 1450-.
9. An amorphous alloy strip, wherein the iron-based amorphous alloy strip is prepared by the amorphous alloy strip preparation method according to any one of claims 1-8.
10. The amorphous alloy ribbon of claim 9, wherein the thickness of the finally-produced amorphous alloy ribbon is greater than or equal to 40 microns;
preferably, the bandwidth of the finally prepared amorphous alloy strip is 50-282 mm.
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| CN115555525A (en) * | 2022-10-14 | 2023-01-03 | 四川大学 | Device and measurement method for real-time measurement of solidification speed of fast solidification ribbon |
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| CN115555525A (en) * | 2022-10-14 | 2023-01-03 | 四川大学 | Device and measurement method for real-time measurement of solidification speed of fast solidification ribbon |
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