CN115233040B - Nickel-chromium-iron alloy material for temperature control and preparation method and application thereof - Google Patents
Nickel-chromium-iron alloy material for temperature control and preparation method and application thereof Download PDFInfo
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- CN115233040B CN115233040B CN202211146875.3A CN202211146875A CN115233040B CN 115233040 B CN115233040 B CN 115233040B CN 202211146875 A CN202211146875 A CN 202211146875A CN 115233040 B CN115233040 B CN 115233040B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/023—Alloys based on nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
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Abstract
The application discloses a nickel-chromium-iron alloy material for controlling temperature, which comprises Fe, cr, si, al, mn and Ni elements, wherein the nickel-chromium-iron alloy material is subjected to phase change between 290 ℃ and 340 ℃, and is changed from a non-equilibrium gamma (Fe, ni) phase to an equilibrium phase FeNi 3 At this time, the temperature coefficient of resistance TCR of the material significantly increases. The application also provides a preparation method of the nickel-chromium-iron alloy material for controlling the temperature. The application nickel-chromium-iron alloy material be applied to roll firing equipment simple, temperature steerable, the heat-conducting oil safe in utilization guaranteed temperature control system's heater, can the short-term test heater through electrical system reachs this temperature to through the electrical control heater temperature, heat-conducting oil temperature promptly, and carry out overheat protection when reacing the sudden change temperature, can realize temperature control's effect, improve the security that the heat-conducting oil used.
Description
Technical Field
The invention belongs to the technical field of preparation of a nickel-chromium-iron alloy material, and particularly relates to a temperature-control nickel-chromium-iron alloy material as well as a preparation method and application thereof.
Background
Metal materials such as steel, aluminum, etc. have been widely used in daily life, such as aluminum doors and windows, stainless steel kitchen ware, roofing steel plate, automobile body, etc. The rolled sheet is an important application mode of metal materials, and during rolling, the temperature difference between a roller and the metal materials often causes uneven heat inside the metal materials, and particularly in the process of rolling thin plates, the problems of reduced plasticity of the materials, cracking of the metal materials, low processing yield and the like are often caused by rapid cooling.
By controlling the temperature of the roller and adopting the method of adding a heating element in the roller to heat the interior and filling heat conducting oil (the temperature of the heat conducting oil can reach 290-340 ℃) to uniformly heat the surface of the roller, the plasticity of the alloy can be improved and the yield of the rolled plate can be improved. In the invention patents of the Chinese patent application numbers CN 104588412A, CN 217141727U and CN 207681177U, innovative schemes are provided for the position of a heating part, the flowing of heat-conducting oil, heat exchange and the like, but the prior method for measuring the temperature of the surface of the roller cannot realize the accurate adjustment of the temperature of the roller, and the stability and the processing safety of the rolling process are difficult to ensure. In the chinese patent application No. CN 202921654U, a complex automatic temperature control system is proposed, and temperature measuring couple detection is provided for heater outlet oil temperature, roller temperature, oil return temperature, ambient temperature, slab heating temperature, and lubricating oil temperature, so that the temperature can be effectively adjusted in time, and a plate with stable performance can be finally rolled. However, the automatic temperature control system is too complex, difficult to manufacture and high in cost.
Disclosure of Invention
Aiming at the defects of the prior art, the application provides a nickel-iron-chromium heating element material for controlling temperature and a preparation method thereof, the material has a stable resistance temperature coefficient below 340 ℃, the resistance temperature coefficient mutation exists between 290 ℃ and 340 ℃, TCR is more than 1000 ppm/DEG C during mutation, a TCR mutation signal is captured by an electric control system, and the temperature of the heating element can be monitored.
In order to solve the above problems, the technical scheme adopted by the present application is as follows:
the temperature-controlled nickel-chromium-iron alloy material comprises Fe, cr, si, al, mn and Ni elements, and the nickel-chromium-iron alloy material undergoes phase change at 290-340 ℃ and is changed from a non-equilibrium gamma (Fe, ni) phase to an equilibrium phase FeNi 3 And realizing TCR value mutation.
As a further preferable scheme, in the nickel-chromium-iron alloy material for controlling the temperature, the mass ratio of Fe to Ni is 0.47-0.52, and the total content of Fe and Ni is more than or equal to 80%.
In a further preferable scheme, in the nickel-chromium-iron alloy material for controlling the temperature, the mass ratio of Fe to Cr is 1.4 to 1.7.
As a further preferable scheme, the temperature-controlling nichrome material described in the present application comprises the following components in percentage by mass: 26-29% of Fe, 16-18% of Cr, 0.5-0.8% of Si, 0.1-0.3% of Al, 0.2-0.5% of Mn0.2, and the balance of Ni.
As a further preferable scheme, the nickel-chromium-iron alloy material for controlling the temperature further comprises inevitable impurities, and the content of the inevitable impurities is less than or equal to 0.5%.
The invention also provides a preparation method of the temperature-control nickel-chromium-iron alloy material, and the phase change occurs at a specific temperature by the method, so that the nickel-chromium-iron alloy material with the TCR value obviously mutated is realized. The preparation method comprises
Alloy smelting, namely carrying out vacuum smelting on metal raw materials of Fe, cr, si, al, mn and Ni to obtain an alloy ingot;
alloy forging, wherein the alloy cast ingot is forged to obtain a forging stock;
and (3) alloy rolling, namely rolling the forging stock to obtain a hot rolled bar stock, and rapidly cooling the hot rolled bar stock to room temperature after solid solution of the hot rolled bar stock.
As a further preferable scheme, in the preparation method, the alloy forging is to forge the alloy ingot at 950 to 1150 ℃ and the finish forging temperature is not lower than 700 ℃; the alloy rolling is to roll the forging stock at the temperature of 900-1100 ℃ and the finishing temperature of more than or equal to 600 ℃.
As a further preferable scheme, the preparation method described in the present application further includes that during alloy smelting, a refining agent removes impurities in the alloy melt.
The application provides a third aim at, provides a nichrome heating wire for accuse temperature, is this application nichrome material obtain after drawing the silk material.
The fourth aim of this application provides an application of nichrome alloy heater for accuse temperature in roll firing equipment temperature control system. The temperature control system comprises the nickel-chromium-iron alloy heating wire, and because the heating wire has a resistance temperature coefficient mutation between 290 ℃ and 340 ℃, the electric control system can monitor the temperature of the heating element by capturing TCR mutation signals to realize overheating protection.
Compared with the prior art, the beneficial effects of the application lie in:
1. the alloy composition of the temperature-controlled nickel-chromium-iron alloy material is controlled, such as Fe and FeNi mass ratio, realizes reasonable phase transition temperature, and changes from non-equilibrium gamma (Fe, ni) phase to equilibrium phase FeNi 3 At this time, the Temperature Coefficient of Resistance (TCR) value of the material is obviously increased; by adjusting the mass ratio of Fe to Cr, the formation of brittle intermetallic compounds is avoided; and a certain amount of Mn is introduced, mnO is formed at high temperature, the resistivity is increased, and the TCR mutation value is improved.
2. The prepared nickel-chromium-iron alloy material for temperature control can be used as a heating wire to be applied to a temperature control system of roller heating equipment, the operation is simple, the temperature can be controlled, and the use safety of heat conduction oil is guaranteed; the temperature control device can realize the sudden change of the high resistance temperature coefficient when the temperature is about 300-310 ℃, and due to the existence of the sudden change, the electric control system adopting the nickel-chromium-iron alloy heating wire can control the temperature of the heating wire, namely the temperature of the heat conducting oil, and carries out overheat protection when reaching the sudden change temperature, thereby achieving the effect of temperature control and improving the use safety of the heat conducting oil.
The present application will be described in further detail with reference to the following drawings and detailed description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 shows the resistivity of the materials as a function of temperature for the examples and comparative examples.
FIG. 2 shows the TCR values of the materials of the examples and comparative examples as a function of temperature.
FIG. 3 shows the variation of the TCR mutation temperature of the material with the Fe/Ni mass ratio.
Detailed Description
In the present application, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. "\8230; \8230, one or more" means one or more selected from the listed combinations.
In one embodiment of the present application, the nichrome material for controlling temperature comprises Fe, cr, si, al, and Ni elements, and changes from an unbalanced gamma (Fe, ni) phase to an equilibrium phase FeNi phase 3 And realizing TCR value mutation. In some embodiments of the application, the mass ratio of Fe to Ni in the temperature-control nickel-chromium-iron alloy material is 0.47-0.55, and the total content of Fe and Ni is more than or equal to 80%; or/and the mass ratio of Fe to Cr in the nickel-chromium-iron alloy material for controlling the temperature is 1.4 to 1.7.
In the application, the mass ratio of Fe and Ni is controlled to regulate the phase transition temperature of the material, when the mass ratio of Fe to Ni is 0.47-0.52 and the total content of Fe and Ni is more than or equal to 80%, the alloy material can be subjected to phase transition within the temperature range of 290-340 ℃, when the metal material is used as a heating wire, the temperature range of 290-300 ℃ can be reached to realize the obvious mutation of the TCR value, and the TCR value after mutation is more than or equal to 1000 ppm/DEG C. Preferably, in some embodiments, the mass ratio of Fe to Ni is 0.47 to 0.517, and in one embodiment, the mass ratio of Fe to Ni may be 0.47 to 0.485, or 0.47 to 0.50, or 0.485 to 0.517.
In the application, cr is added to form an oxide film to realize the high-temperature resistance and oxidation resistance of the material, but when the Cr exceeds a certain proportion, an intermetallic compound is formed, the existence of the intermetallic compound can play a role in hindering the movement of slippage and dislocation, so that the strength and hardness of the alloy are improved, and the performances such as plasticity, toughness and the like are influenced. The aim of avoiding the influence of the formation of brittle intermetallic compounds on the mechanical properties of the alloy can be achieved by controlling the mass ratio of Fe to Cr in the application, and simultaneously, part of Cr forms Cr 2 O 3 The dense passive oxide film can block the water gas and oxygen in the atmosphere, protect the base material from being corroded by the influence of oxidation, even if the surface of the material is damaged by external force or chemical means. Therefore, in the present application, the mass ratio of Fe to Cr is in the range of 1.4 to 1.7, which is effectiveThe influence of the brittle intermetallic compound on the alloy performance is avoided. Further, in some embodiments, the mass ratio of Fe to Cr is 1.42 to 1.50.
As a further preferable scheme, on the basis of the scheme, the temperature-controlling nichrome alloy material comprises the following components in percentage by mass: 26-29% of Fe, 16-18% of Cr, 0.5-0.8% of Si, 0.1-0.3% of Al, 0.2-0.5% of Mn0, and the balance of Ni. In particular embodiments herein, the addition of Si, which may increase the elastic limit, yield point and tensile strength of the alloy material when formed into an alloy, is an element of Si. After Al element is added, ni can be formed under the condition of not changing phase change 3 Al, further improving the mechanical property of the alloy. Mn element is added to form MnO at high temperature, so that the resistivity of the alloy material can be increased, and the TCR mutation value is improved.
Because the metal raw materials used in the alloy processing and preparation process contain small amount of impurities, the inevitable impurities can be nonmetal elements such as carbon, nitrogen, phosphorus, sulfur and the like or compounds of the elements; the presence of these impurities can affect the corrosion resistance and mechanical properties of the alloy. Therefore, in the present application, as a further preferable aspect, the inconel material described herein further contains unavoidable impurities, and the content of the impurities is 0.5% or less. In some embodiments, the level of impurities is 0.3% or less.
In some embodiments of the present application, a method for preparing a temperature-controlled nicr-fe alloy material is also provided, by which a phase change occurs at a specific temperature, and a TCR value of the nicr-fe alloy material is significantly mutated.
The preparation method comprises
Alloy smelting, namely carrying out vacuum smelting on metal raw materials of Fe, cr, si, al, mn and Ni to obtain an alloy ingot;
alloy forging, wherein the alloy cast ingot is forged to obtain a forging stock;
and (3) alloy rolling, namely rolling the forging stock to obtain a hot rolled bar stock, and rapidly cooling the hot rolled bar stock to room temperature after solid solution of the hot rolled bar stock.
As a further preferable scheme, in the preparation method, the alloy forging is to forge the alloy cast ingot at 950 to 1150 ℃ and the finish forging temperature of not less than 700 ℃; in the alloy rolling process, the forging stock is rolled at the temperature of 900-1100 ℃ and the finishing temperature of more than or equal to 600 ℃, so that the alloy has good deformation behavior, the rolling defects in the preparation process are reduced, and meanwhile, the full formation of an unbalanced gamma (Fe, ni) phase is ensured at the temperature. In some embodiments, the alloy forging is performed at a temperature of 950 to 1050 ℃ and a finish forging temperature of 800 to 900 ℃. In other embodiments, the alloy rolling is carried out by rolling the forging stock at the temperature of 900 to 1000 ℃ and the finishing temperature of 700 to 900 ℃.
Because the metal raw materials used in the alloy processing and preparation process contain small amount of impurities, the inevitable impurities can be nonmetal elements such as carbon, nitrogen, phosphorus, sulfur and the like or compounds of the elements; the presence of these impurities can affect the corrosion resistance and mechanical properties of the alloy. Therefore, the removal of impurities from the alloy plays an important role in the processing of the alloy. In some embodiments, the preparation method further comprises removing impurities in the alloy melt by using a refining agent in the alloy smelting process.
The third aim at of this application provides one kind and adopts this application the heater that nichrome was made, specifically is through the silk material that obtains after drawing the nichrome material in this application.
The application also provides an application of the nickel-chromium-iron alloy heating wire for temperature control in the temperature control system of the roller heating equipment. After the conduction oil of the heating wire of this application heaies up and exceeds 290 ℃, the TCR value can take place the sudden change, and this kind of sudden change can make electrical system detect the heating wire fast and reach this temperature to through automatically controlled control heating wire temperature, heat conduction oil temperature promptly, can reach temperature control's effect, improve the security that the conduction oil used.
Embodiment 1
The nickel-chromium-iron heating wire material is prepared by the following steps: according to 26.15% of Fe,17.0% of Cr,0.6Si%,0.2% of Al,0.4% of Mn,55.65% of Ni by mass, fe/Ni =0.47, metal raw materials are added and stirred uniformly under vacuum, impurities are removed by using a refining agent, and an alloy ingot is smelted; forging the obtained alloy ingot at the temperature of 1000-1100 ℃ and the finish forging temperature of 800 ℃ to obtain a forging stock; rolling the forging stock at the temperature of 900-1100 ℃ and the finish rolling temperature of 700 ℃ to obtain a hot-rolled bar stock; keeping the temperature of the hot-rolled bar blank at 800 ℃ for 1 hour, and rapidly cooling the hot-rolled bar blank to room temperature at the cooling speed of 160 ℃/s; and drawing the processed hot-rolled bar blank for 10 times to obtain a wire material.
As shown in FIGS. 1 to 3, the diameter of the heater prepared under the conditions of this example was 0.15mm, and the resistivity of the heater was 0.969. Mu. OMEGA.m, and the TCR increased from 345 ppm/deg.C to 1238 ppm/deg.C (the highest TCR). The TCR value is less than 482 ppm/DEG C after the temperature exceeds 310 ℃.
Example II
In the embodiment, the nickel-chromium-iron heating wire material is prepared by the following steps: according to 26.71% Fe,17.0% Cr,0.6Si%,0.2% Al,0.4Mn,55.08% Ni mass%, fe/Ni =0.485, adding and stirring the metal raw materials under vacuum condition, removing impurities using a refining agent, refining into alloy ingot; forging the obtained alloy ingot at the temperature of 1000-1100 ℃ and the finish forging temperature of 800 ℃ to obtain a forging stock; rolling the forging stock at the temperature of 900-1100 ℃ and the finish rolling temperature of 700 ℃ to obtain a hot-rolled bar stock; keeping the temperature of the hot-rolled bar blank at 800 ℃ for 1 hour, and rapidly cooling the hot-rolled bar blank to room temperature at the cooling speed of 160 ℃/s; and drawing the processed hot-rolled bar blank for 10 times to obtain the wire.
As shown in FIGS. 1 to 3, the diameter of the heater wire prepared under the conditions of this example was 0.15mm, the resistivity of the heater wire was 0.962. Mu. OMEGA.m, and the TCR increased from 408 ppm/deg.C to 1156 ppm/deg.C (1463 ppm/deg.C, the highest TCR value at 315 deg.C) from the room temperature to 310 deg.C). The TCR value is less than 537 ppm/DEG C after the temperature exceeds 320 ℃.
Example three
In the embodiment, the nickel-chromium-iron heating wire material is prepared by the following steps:
according to 27.27% of Fe,17.0% of Cr,0.6Si%,0.2% of Al,0.4% of Mn,54.53% of Ni by mass, fe/Ni =0.50, raw materials are added and stirred uniformly under vacuum, impurities are removed using a refining agent, and an alloy ingot is formed; forging the obtained alloy ingot at the temperature of 1000-1100 ℃ and the finish forging temperature of 850 ℃ to obtain a forging stock; rolling the forging stock at the temperature of 900-1100 ℃ and the finishing temperature of 800 ℃ to obtain a hot-rolled bar stock; keeping the temperature of the hot-rolled bar blank at 850 ℃ for 1 hour, and rapidly cooling to room temperature at the cooling speed of 160 ℃/s; and drawing the processed hot-rolled bar blank for 10 times to obtain the wire.
As shown in FIGS. 1 to 3, the diameter of the heater prepared under this example was 0.15mm, the resistivity of the heater was 0.971. Mu. Ω. M, and the TCR increased from 391 ppm/deg.C to 1032 ppm/deg.C (the highest TCR). After the temperature exceeds 325 ℃, the TCR value is less than 412 ppm/DEG C.
Example four
The preparation method of the nickel-chromium-iron heating wire material with the temperature coefficient of resistance mutation comprises the following steps: according to 27.88% of Fe,17.0% of Cr,0.6Si%,0.2% of Al,0.4% of Mn,53.92% of Ni by mass, fe/Ni =0.517, the raw materials are added and stirred uniformly under vacuum, and impurities are removed by using a refining agent, and an alloy ingot is formed; forging the obtained alloy ingot at the temperature of 1000 to 1100 ℃ and the finish forging temperature of 900 ℃ to obtain a forging stock; rolling the forging stock at the temperature of 900-1100 ℃ and the finishing temperature of more than or equal to 700 ℃ to obtain a hot-rolled bar stock; keeping the temperature of the hot-rolled bar blank at 900 ℃ for 1 hour, and rapidly cooling the hot-rolled bar blank to room temperature at the cooling speed of 160 ℃/s; and drawing the processed hot-rolled bar blank for 10 times to obtain the wire.
As shown in FIGS. 1 to 3, the diameter of the heater prepared under the conditions of this example was 0.15mm, the resistivity of the heater was 0.974. Mu. Ω. M, and the TCR increased from 433 ppm/deg.C to 729 ppm/deg.C (maximum TCR). After the temperature exceeds 330 ℃, the TCR value is less than 567 ppm/DEG C.
Comparative example 1
The comparative example is prepared by the following steps:
according to 25.77% of Fe,17.0% of Cr,0.6Si%,0.2% of Al,0.4% of Mn,56.03% of Ni by mass, fe/Ni =0.46, the raw materials are added and stirred uniformly under vacuum, and impurities are removed by using a refining agent to refine an alloy ingot; forging the obtained alloy ingot at the temperature of 1000-1100 ℃ and the finish forging temperature of 800 ℃ to obtain a forging stock; rolling the forging stock at the temperature of 900-1100 ℃ and the finish rolling temperature of 700 ℃ to obtain a hot-rolled bar stock; keeping the temperature of the hot-rolled bar blank at 800 ℃ for 1 hour, and rapidly cooling the hot-rolled bar blank to room temperature at the cooling speed of 160 ℃/s; and drawing the processed hot-rolled bar blank for 10 times to obtain a wire material.
As shown in FIGS. 1 to 3, the diameter of the heat generating wire prepared under the conditions of this comparative example was 0.15mm, and the resistivity of the heat generating wire was 0.959. Mu. OMEGA.m, and the temperature was raised from room temperature to 290 ℃ to increase the TCR value from 145 ppm/deg.C to 477 ppm/deg.C (the highest TCR value). After the temperature exceeds 290 ℃, the TCR value is less than 365 ppm/DEG C. In this comparative example, there was a mutation in the TCR values, but the mutation was relatively insignificant relative to the changes of example 1-example 4.
Comparative example II
The comparative example is prepared by the following steps:
according to 28.61% Fe,17.0% Cr,0.6Si,0.2% Al,0.4% Mn,53.19% Ni mass percent, fe/Ni =0.538, adding the raw materials under vacuum and stirring uniformly, removing impurities using a refining agent, refining into an alloy ingot; forging the obtained alloy at the temperature of 1000-1100 ℃ and the finish forging temperature of 900 ℃ to obtain a forging stock; rolling the forging stock at the temperature of 900-1100 ℃ and the finishing temperature of 800 ℃ to obtain a hot rolled bar stock, preserving the heat of 900 ℃ for 1 hour, and rapidly cooling to room temperature at the cooling speed of 160 ℃/s; and drawing the processed hot-rolled bar blank for 10 times to obtain the wire.
As shown in FIGS. 1 to 3, the diameter of the heating wire prepared under the conditions of this comparative example was 0.15mm, and the resistivity of the heating wire was 0.970. Mu. Ω. M. When the heating temperature is lower than 340 ℃, the TCR value is about 302 ppm/DEG C at most, and no obvious mutation exists.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (6)
1. The temperature-control nickel-chromium-iron alloy material is characterized by comprising Fe, cr, si, al, mn and Ni elements, and the nickel-chromium-iron alloy material has phase change between 290 ℃ and 340 ℃ and is changed from a non-equilibrium gamma (Fe, ni) phase to an equilibrium phase FeNi phase 3 Realizing TCR value mutation, wherein each element comprises 26-29 percent of Fe, 16-18 percent of Cr, 0.5-0.8 percent of Si, 0.1-0.3 percent of Al, 0.2-0.5 percent of Mn, and the balance of Ni and impurities with the content less than or equal to 0.5 percent; the mass ratio of Fe to Ni is 0.47 to 0.52, and the total content of Fe and Ni is more than or equal to 80 percent; the mass ratio of Fe to Cr is 1.4-1.7.
2. The method for preparing the temperature-controlled nickel-chromium-iron alloy material according to claim 1, which comprises
Alloy smelting, namely carrying out vacuum smelting on metal raw materials of Fe, cr, si, al, mn and Ni to obtain an alloy ingot;
alloy forging, wherein the alloy cast ingot is forged to obtain a forging stock;
and (3) alloy rolling, namely rolling the forging stock to obtain a hot rolled bar stock, and rapidly cooling the hot rolled bar stock to room temperature after solid solution of the hot rolled bar stock.
3. The preparation method according to claim 2, wherein in the alloy forging process, the alloy ingot is forged under the conditions that the temperature is 950 to 1150 ℃ and the finish forging temperature is more than or equal to 700 ℃; in the alloy rolling process, the forging stock is rolled at the temperature of 900-1100 ℃, and the final rolling temperature is more than or equal to 600 ℃.
4. The method as claimed in claim 2, further comprising removing impurities from the alloy melt by using a refining agent during alloy melting.
5. A temperature-controlled nichrome heating wire which is characterized in that the wire material is obtained by drawing the nichrome material according to claim 1.
6. Use of the inconel heater for controlling temperature according to claim 5 in a temperature control system of a roll heating apparatus.
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| CN101707948A (en) * | 2007-06-26 | 2010-05-12 | 蒂森克鲁普德国联合金属制造有限公司 | iron-nickel-chromium-silicon alloy |
| CN108707913A (en) * | 2018-05-29 | 2018-10-26 | 丹阳市曙光镍材有限公司 | A kind of production technology of environmentally protective anti-explosion heater nichrome resistance wire |
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| CN101707948A (en) * | 2007-06-26 | 2010-05-12 | 蒂森克鲁普德国联合金属制造有限公司 | iron-nickel-chromium-silicon alloy |
| CN108707913A (en) * | 2018-05-29 | 2018-10-26 | 丹阳市曙光镍材有限公司 | A kind of production technology of environmentally protective anti-explosion heater nichrome resistance wire |
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