CN107245673B - Iron-based amorphous nanometer crystalline thin strip magnet and its preparation method and application method - Google Patents

Abstract

Iron-based amorphous nanometer crystalline thin strip magnet of the present invention and its preparation method and application method, it is related to the amorphous alloy that iron makees main component, the iron-based amorphous nanometer crystalline thin strip magnet is Finemet type amorphous nano-crystalline thin strip magnet, its mass percentage composition expression formula is AxFy, in formula, the mass percentage composition of x limits range as 70≤x≤90, and the mass percentage composition of y limits range as 10≤y≤30；Component A is that atomic percent group becomes Fe_aCu_bM_cSi_dB_eMaster alloying A, F component is amorphous thin ribbon F corresponding with the composition of component A master alloying A, by the iron-based amorphous nanometer crystalline thin strip magnet is mutually made with the ratio of amorphous phase by optimizing nanocrystalline α-Fe (Si), it be used to prepare iron-based amorphous and nanocrystalline soft magnetic alloy core products；The present invention overcomes existing similar products, that there are magnetic properties is still lower, high production cost and is difficult the defect produced in batches in production.

Description

Iron-based amorphous nanocrystalline thin strip magnet and its preparation method and application method

technical field

The technical scheme of the invention relates to an amorphous alloy with iron as the main component, specifically an iron-based amorphous nanocrystalline thin-strip magnet and its preparation method and application method.

Background technique

Yoshizawa et al. (Y.Yoshizawa, S.Oguma, K.Yamauchi. New Fe-based soft magnetic alloys composed of ultrafine grain structure[J]. Journal of Applied Physics.1988,64:6044-6046.) of Hitachi in 1988 Invented Finemet, an amorphous and nanocrystalline material with excellent soft magnetic properties. Finemet-type amorphous nanocrystal means that after the Fe-M-Cu-Si-B amorphous strip is subjected to isothermal heat treatment, the nanoscale soft magnetic phase is precipitated from the amorphous matrix, and finally the material obtains the amorphous phase and nanometer A state in which crystal phases coexist. Because this type of alloy is easy to spray and has good soft magnetic properties, such as the saturation magnetic induction of 1.2T, the initial magnetic permeability of 10 ⁴ to 10 ⁵ , low coercive force and small iron loss in a wide frequency range , are widely used in the soft magnetic industry.

At present, with the development of the electrical appliance industry, the global demand for Finemet-type iron-based amorphous nanocrystalline alloys is increasing year by year, and the research and development of this type of magnetic materials is in full swing. CN101787500B discloses a preparation method of Fe _a Si _b B _c C _d Al _e amorphous ribbon, but the amorphous ribbon has a relatively large coercive force, and has a high melting point element C in the alloy, so it is difficult to produce Defects for mass production. CN102953020A discloses an iron-based amorphous nanocrystalline soft magnetic alloy material and a preparation method thereof, but the series of thin strips have the defects of low initial magnetic permeability and expensive Co which increases production costs.

Contents of the invention

The technical problem to be solved by the present invention is to provide an iron-based amorphous nanocrystalline thin strip magnet and its preparation method and application method. The iron-based amorphous nanocrystalline thin strip magnet is a Finemet type amorphous nanocrystalline thin strip magnet. The ratio of the nanocrystalline α-Fe(Si) phase to the amorphous phase overcomes the defects of low magnetic performance, high production cost and difficulty in mass production in existing similar products.

The technical solution adopted by the present invention to solve the technical problem is: the iron-based amorphous nanocrystalline thin strip magnet is a Finemet type amorphous nanocrystalline thin strip magnet, and its mass percentage composition expression is AxFy, where the A component is The atomic percent composition is the main alloy A of Fe _a Cu _b M _c Si _d Be _e , wherein M is at least one element among Nb, V and Mo elements, and a, b, c, d and e represent the atomic percent of the element composition , 70.0≤a≤74.5, 1.0≤b≤1.5, 2.5≤c≤3.5, 11.5≤d≤14.5, 8.3≤e≤14.5, and satisfy a+b+c+d+e=100; F component is with Amorphous ribbon F corresponding to the composition of main alloy A of component A, the mass percentage of crystalline phase contained therein ranges from 2.0% to 30.0%, and the limited range of composition mass percentage x of component A is 70≤x≤ 90. The limited range of composition mass percentage y of F component is 10≤y≤30.

The iron-based amorphous nanocrystalline thin-strip magnet has a thickness of 25-35 μm and a bandwidth of 10-40 mm.

The preparation method of the above-mentioned iron-based amorphous nanocrystalline thin strip magnet, the specific steps are as follows:

The first step is to prepare raw materials:

Calculate the mass of each element according to the composition formula Fe _a Cu _b M _c Si _d Be _e in atomic percentage, where M is at least one element among Nb, V and Mo elements, and a, b, c, d and e represent the element composition Atomic percentage of 70.0≤a≤74.5, 1.0≤b≤1.5, 2.5≤c≤3.5, 11.5≤d≤14.5, 8.3≤e≤14.5, and satisfy a+b+c+d+e=100, weigh Required raw materials: ferro-niobium, ferro-boron, ferro-vanadium, ferro-molybdenum, pure silicon, pure copper and pure iron to complete the preparation of raw materials;

The second step is to prepare the main alloy A ingot:

Add the raw materials prepared in the first step above into the smelting furnace, evacuate the furnace body to a vacuum degree of <5×10 ^-1 Pa, heat and melt until all the raw materials added are melted and the ingredients are evenly distributed, and then the melted Slag removal and slag removal, and finally poured into a mold for cooling to obtain a main alloy A ingot whose atomic percentage composition is Fe _a Cu _b M _c Si _d Be _e ;

The third step is to prepare the amorphous ribbon F:

Put the main alloy A ingot obtained in the second step above into a melt quenching furnace, and after re-melting, perform melt quenching on a copper roller at a line speed of 20-45m/s, thereby producing non-alloy Crystal ribbon F;

The fourth step is to prepare iron-based amorphous and nanocrystalline thin strip magnets:

Put the ingot of the main alloy A obtained in the second step above into a remelting furnace to melt, smelt evenly and wait 10 to 20 minutes before it is released from the furnace. The composition expression of the amorphous strip F prepared in the third step above is expressed as The mass percentage of the composition is added to the melt of the remelted uniform main alloy A ingot. In the AxFy formula, the mass percentage composition x of the main alloy A is limited to 70≤x≤90, and the mass percentage composition of the amorphous strip F is y The limited range is 10≤y≤30, then slag the mixed AxFy melt, and spray it in the atmosphere at a speed of 20-40m/s to obtain an iron-based amorphous nanocrystalline thin-strip magnet;

Measured by a vernier caliper and a micrometer: the thickness of the prepared iron-based amorphous nanocrystalline thin strip magnet is 25-35 μm, and the bandwidth is 10-40 mm; calculated according to Jade software: the mass fraction of the crystalline phase in the amorphous thin strip F is 2.0-30.0%.

For the preparation method of the above-mentioned iron-based amorphous nanocrystalline thin strip magnet, the raw materials used are all obtained from known channels, the equipment is all known chemical equipment, and the process operation methods used are well known to those skilled in the art .

The application method of the above-mentioned iron-based amorphous nanocrystalline thin strip magnet is used to prepare iron-based amorphous nanocrystalline soft magnetic alloy iron core products, and the steps are as follows:

The first step is to prepare the iron-based amorphous iron core:

The iron-based amorphous nanocrystalline thin-ribbon magnet obtained by the above method for preparing the iron-based amorphous nanocrystalline thin-ribbon magnet is rolled into an iron-based amorphous iron core of corresponding specifications by a winding machine;

The second step is to prepare iron-based amorphous nanocrystalline soft magnetic alloy iron core products:

Put the iron-based amorphous iron core rolled in the first step above into an annealing furnace, and anneal at 540-580°C to obtain nanocrystals evenly distributed on the amorphous matrix, that is, to obtain iron-based amorphous nanocrystals Soft magnetic alloy iron core products.

Measured by a vernier caliper: the size of the obtained iron-based amorphous nanocrystalline soft magnetic alloy iron core product is outer diameter × inner diameter × height = D × d × h = Φ30mm × Φ24.92mm × (10-40) mm; according to Calculation by Jade software: the mass fraction of crystalline phase in AxFy iron-based amorphous nanocrystalline soft magnetic alloy iron core product is 78.4~86.2%; the magnetic properties of this product are measured by MATS-2010SD soft magnetic DC measuring device: saturation magnetic induction intensity It is 1.26~1.49T, and the initial magnetic permeability is 125k~148k.

For the application method of the above-mentioned iron-based amorphous nanocrystalline thin-strip magnet, the equipment used is all well-known chemical equipment, and the process operation methods used are well known to those skilled in the art.

The beneficial effects of the present invention are as follows:

Compared with the prior art, the outstanding substantive features of the present invention are:

(1) There is a short-range ordered amorphous phase in the amorphous ribbon F, and this short-range ordered amorphous structure is retained from the molten alloy whose mass percentage composition expression is AxFy, and is uniformly distributed. Bulk rapid quenching technology, based on the genetic effect of the structure, the alloy is more likely to form a uniformly distributed amorphous phase structure on the basis of a short-range ordered structure, and provides nucleation points for the crystallization nucleation of amorphous thin strips, that is, to reduce the formation of amorphous crystals. Optimized activation energy, thereby optimizing the ratio of nanocrystalline α-Fe(Si) phase and amorphous phase, overcoming the defects of low magnetic properties, high production cost and difficulty in mass production in existing similar products .

(2) In the preparation method of the present invention, the obtained amorphous ribbon F presents an amorphous crystal structure as a whole, but in fact this amorphous structure is composed of many short-range ordered nanoclusters. The crystal thin ribbon F is added to the remelting furnace, and it is rapidly melted in the main alloy liquid A within 10-20 minutes, and its nano-clusters with unchanged structures are evenly dispersed in the main alloy liquid A, which is equivalent to an additional increase in a short time Proportion of nanoclusters per unit volume in AxFy alloys. In the subsequent rapid cooling, these nanoclusters still retain the original structure, and in the subsequent annealing process, these clusters are the nucleation points for the beginning of crystallization, so that the annealed nanocrystalline phases are more, finer, and uniform, resulting in Beneficial effects of "tissue inheritance".

(3) The amorphous state is a high-energy metastable state. When the amorphous strip F is added to the main alloy A liquid, it will actually go through the process of amorphous state-crystallization-melting, and high energy will be released during the crystallization process of the amorphous state. It can increase the temperature of the main alloy A liquid before spraying thin strips, which can make the composition of the liquid more uniform, improve the fluidity of the liquid during spraying, reduce the generation of impurities and defects on the thin strips, and thus improve the yield , and ultimately the magnetic induction and permeability of the strip can be improved.

(4) In the application method of the present invention, after the amorphous iron core obtained by rolling is annealed, a nanocrystalline soft magnetic phase with a more uniform size and finer size is formed on the amorphous substrate, and the adjacent nanocrystals are formed through the amorphous substrate. Exchange coupling effect, the reduction of nanocrystalline size and the increase of the number of nanocrystalline phases equal to the increase of the interaction area, thereby improving the magnetic properties of the iron-based amorphous nanocrystalline soft magnetic alloy core products obtained after annealing.

(5) After searching, so far, no report has been found to improve the soft magnetic properties of Finemet-type alloy amorphous nanocrystals by adjusting the master alloy remelt.

Compared with prior art, remarkable progress of the present invention is:

(1) The iron-based amorphous nanocrystalline thin strip magnet of the present invention, by adding the same composition amorphous thin strip in the remelting liquid, compared with the product after annealing without adding the amorphous thin strip, the saturation magnetic induction of the material is improved Strength, with higher initial permeability and maximum permeability, the static saturation magnetic induction of the iron-based amorphous nanocrystalline soft magnetic alloy core product at room temperature is 1.26-1.49T, and the initial permeability can reach 125k ~148k, which is higher than the magnetic properties of existing similar products, and improves the comprehensive soft magnetic properties and mechanical properties of the material without changing the material composition.

(2) In the preparation method of the present invention, the amorphous thin ribbon F can be replaced by an unqualified amorphous thin ribbon with non-foreign component impurity defects during spraying in the early stage, which saves energy, improves the utilization rate of raw materials, and overcomes the need for prior art production. The disadvantages of high cost and difficulty in mass production in production.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the X-ray diffraction pattern of Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 amorphous ribbon F in Example 1 of the present invention.

Fig. 2 is the DSC test curve of Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 amorphous ribbon F in Example 1 of the present invention.

Fig. 3 is the DSC test curve of the (Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )70 (Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )30 iron-based amorphous nanocrystalline thin strip magnet in Example 1 of the present invention.

Fig. 4 is the X-ray diffraction pattern of (Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )70 (Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )30 iron-based amorphous nanocrystalline thin strip magnet in Example 1 of the present invention.

Hysteresis of (Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )70 (Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )30 iron-based amorphous nanocrystalline soft magnetic alloy core product in Fig. 5 of the present invention Wire.

Detailed ways

Example 1

The iron-based amorphous nanocrystalline thin strip magnet of this embodiment has a mass percentage composition expression of AxFy, where the A component is the main alloy A and F of which the atomic percentage composition is Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 The component is an amorphous thin strip F corresponding to the composition of the main alloy A of the A component, and the mass percentage of the crystalline phase contained in it is 10.5%; the composition mass percentage x of the A component is 70, and the composition of the F component The mass percentage y is 30.

The preparation method of the above-mentioned iron-based amorphous nanocrystalline thin strip magnet, the steps are as follows:

The first step is to prepare raw materials:

Calculate the mass of each element according to the composition formula Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 in atomic percentage, and weigh the required raw materials: ferroniobium, ferroboron, pure silicon, pure copper and pure iron to complete the preparation of raw materials;

The second step is to prepare Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 main alloy A ingot:

Add the raw materials prepared in the first step above into the smelting furnace, evacuate the furnace body to a vacuum degree of <5×10 ^-1 Pa, heat and melt until all the raw materials added are melted and the ingredients are evenly distributed, and then the melted Slag removal and slag removal, and finally poured into a mold for cooling to obtain a main alloy A ingot with an atomic percentage composition of Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 ;

The third step is to prepare Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 amorphous ribbon F:

Put the main alloy A ingot of Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 obtained in the second step above into the melt rapid quenching furnace, and melt it on the copper roller at a line speed of 40m/s after remelting Bulk rapid quenching, thus obtaining Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 amorphous ribbon F;

The fourth step is to prepare iron-based amorphous and nanocrystalline thin strip magnets:

Put the main alloy A ingot of Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 prepared in the second step above into the remelting furnace for melting, and melt evenly until 15 minutes before the furnace is released. Fe _74.5 Cu _1.5 Nb _2.7 prepared in the third step above The Si _11.5 B _9.8 amorphous ribbon F is expressed in terms of mass percentage as AxFy=(Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )70(Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )30 The mass percentage of the composition is added Remelt the homogeneous Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 master alloy A ingot melt, and then the mixed (Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )70(Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 ) 30 molten slag, in the atmosphere at a speed of 40m / s to spray tape, that is, the iron-based amorphous nanocrystalline thin strip magnets.

Measured by a vernier caliper and a micrometer: the thickness of the prepared iron-based amorphous nanocrystalline thin strip magnet is 25 μm, and the bandwidth is 10 mm; according to the calculation by Jade software, the mass fraction of the crystalline phase in the amorphous thin strip F is 10.5%.

The application method of the above-mentioned iron-based amorphous nanocrystalline thin strip magnet is used to prepare iron-based amorphous nanocrystalline soft magnetic alloy iron core products, and the steps are as follows:

The first step is to prepare the iron-based amorphous iron core:

The iron-based amorphous nanocrystalline thin-ribbon magnet obtained by the above method for preparing the iron-based amorphous nanocrystalline thin-ribbon magnet is rolled into an iron-based amorphous iron core of corresponding specifications by a winding machine;

The second step is to prepare iron-based amorphous nanocrystalline soft magnetic alloy iron core products:

Put the iron-based amorphous iron core prepared in the first step above into an annealing furnace, and anneal at 540°C to obtain nanocrystals uniformly distributed on the amorphous matrix, that is, to obtain iron-based amorphous nanocrystalline soft magnetic Alloy core products.

Measured by a vernier caliper: the size of the iron-based amorphous nanocrystalline soft magnetic alloy iron core product obtained in this embodiment is outer diameter × inner diameter × height = D × d × h = Φ30mm × Φ24.92mm × 10mm; according to Jade software Calculation: The mass fraction of crystalline phase in (Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )70(Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )30 Fe-based amorphous nanocrystalline thin strip magnet is 85.5%; -2010SD type soft magnetic DC measuring device measures the magnetic properties of this product: the saturation magnetic induction is 1.49T, and the initial permeability is 148k.

Figure 1 is the X-ray diffraction pattern of the Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 amorphous ribbon F of this example. Diffuse scattering peaks and diffraction peaks of crystalline phases, indicating that some crystalline phases exist in Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 thin ribbons.

Fig. 2 is the differential scanning calorimetry (DSC) curve of the Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 amorphous ribbon F of this embodiment, as can be seen from the figure that the first initial crystallization temperature of the amorphous ribbon F is 508°C, and the second onset crystallization temperature is 665°C.

Figure 3 is the DSC test curve of the (Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )70 (Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )30 iron-based amorphous nanocrystalline thin strip magnet of this example, as can be seen from the figure The first initial crystallization temperature of the ribbon is 498°C, and the second initial crystallization temperature is 670°C. Compared with Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 The activation energy decreases and the interval between the two crystallization temperatures increases, which is beneficial to enhance the soft magnetic properties of the thin strip.

Fig. 4 is the X-ray diffraction pattern of the (Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )70(Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )30 iron-based amorphous nanocrystalline thin ribbon magnet of this embodiment, in which There are three obvious diffraction peaks. According to Scherrer's formula, the average grain size is 12nm, and there are also some diffuse scattering peaks, indicating that there is still a small amount of amorphous in the thin ribbon.

Figure 5 is the hysteresis loop of the (Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )70 (Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )30 iron-based amorphous nanocrystalline soft magnetic alloy iron core product of this embodiment , the hysteresis loop presents typical soft magnetic characteristics.

Example 2

The iron-based amorphous nanocrystalline thin strip magnet of this embodiment has a mass percentage composition expression of AxFy, where the A component is the main alloy A and F of which the atomic percentage composition is Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 The component is an amorphous thin strip F corresponding to the composition of the main alloy A of the A component, and the mass percentage of the crystalline phase contained therein is 15.6%; the composition mass percentage x of the A component is 80, and the composition of the F component The mass percentage y is 20.

The preparation method of the above-mentioned iron-based amorphous nanocrystalline thin strip magnet, the steps are as follows:

The first step is to prepare raw materials:

With embodiment 1;

The second step is to prepare Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 main alloy A ingot:

With embodiment 1;

The third step is to prepare Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 amorphous ribbon F:

Put the main alloy A ingot of Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 obtained in the second step above into the melt quenching furnace, and melt it on the copper roller at a line speed of 35m/s after remelting Bulk rapid quenching, thus obtaining Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 amorphous ribbon F;

The fourth step is to prepare iron-based amorphous and nanocrystalline thin strip magnets:

Put the main alloy A ingot of Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 prepared in the second step above into the remelting furnace for melting, and melt evenly until 15 minutes before the furnace is released. Fe _74.5 Cu _1.5 Nb _2.7 prepared in the third step above The Si _11.5 B _9.8 amorphous ribbon F is expressed in terms of mass percentage as AxFy=(Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )80(Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )20 The composition mass percentage is added Remelt the homogeneous Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 master alloy A ingot melt, and then mix (Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 ) 80 (Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 ) 20 molten slag, in the atmosphere at a speed of 40m / s to spray tape, that is, the iron-based amorphous nanocrystalline thin strip magnets.

Measured by a vernier caliper and a micrometer: the thickness of the prepared iron-based amorphous nanocrystalline thin strip magnet is 25 μm, and the bandwidth is 20 mm; according to the calculation by Jade software, the mass fraction of the crystalline phase in the amorphous thin strip F is 15.6%.

The application method of the above-mentioned iron-based amorphous nanocrystalline thin strip magnet is used to prepare iron-based amorphous nanocrystalline soft magnetic alloy iron core products, and the steps are as follows:

The first step is to prepare the iron-based amorphous iron core:

With embodiment 1;

The second step is to prepare iron-based amorphous nanocrystalline soft magnetic alloy iron core products:

With embodiment 1;

Measured by a vernier caliper: the size of the iron-based amorphous nanocrystalline soft magnetic alloy iron core product obtained in this embodiment is outer diameter × inner diameter × height = D × d × h = Φ30mm × Φ24.92mm × 20mm; according to Jade software Calculation: The mass fraction of crystalline phase in (Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )80(Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )20 amorphous nanocrystalline thin strip magnet is 83.6%; by MATS-2010SD The magnetic properties of this product measured by the type soft magnetic DC measuring device are: the saturation magnetic induction is 1.35T, and the initial magnetic permeability is 135k.

Example 3

The iron-based amorphous nanocrystalline thin strip magnet of this embodiment has a mass percentage composition expression of AxFy, where the A component is the main alloy A and F of which the atomic percentage composition is Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 The component is an amorphous thin strip F corresponding to the composition of the main alloy A of the A component, and the mass percentage of the crystalline phase contained therein is 18.4%; the composition mass percentage x of the A component is 90, and the composition of the F component The mass percentage y is 10.

The preparation method of the above-mentioned iron-based amorphous nanocrystalline thin strip magnet, the steps are as follows:

The first step is to prepare raw materials:

With embodiment 1;

The second step is to prepare Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 main alloy A ingot:

With embodiment 1;

The third step is to prepare Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 amorphous ribbon F:

Put the main alloy A ingot of Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 obtained in the second step above into the melt quenching furnace, and melt it on the copper roller at a line speed of 30m/s after remelting Bulk rapid quenching, thus obtaining Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 amorphous ribbon F;

The fourth step is to prepare iron-based amorphous and nanocrystalline thin strip magnets:

Put the main alloy A ingot of Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 prepared in the second step above into the remelting furnace for melting, and melt evenly until 15 minutes before the furnace is released. Fe _74.5 Cu _1.5 Nb _2.7 prepared in the third step above The Si _11.5 B _9.8 amorphous ribbon F is expressed in terms of mass percentage as AxFy=(Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )90(Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 ) The composition mass percentage in 10 is added Remelt the homogeneous Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 master alloy A ingot melt, and then mix (Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )90(Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 ) 10 The melt is slagged, and sprayed with a speed of 40m/s in the atmosphere to obtain an iron-based amorphous nanocrystalline thin-strip magnet.

Measured by a vernier caliper and a micrometer: the thickness of the iron-based amorphous nanocrystalline thin strip magnet prepared in this embodiment is 25 μm, and the bandwidth is 30 mm; calculated according to Jade software, the mass fraction of the crystalline phase in the amorphous thin strip F is 18.4 %.

The application method of the above-mentioned iron-based amorphous nanocrystalline thin strip magnet is used to prepare iron-based amorphous nanocrystalline soft magnetic alloy iron core products, and the steps are as follows:

The first step is to prepare the iron-based amorphous iron core:

With embodiment 1;

The second step is to prepare iron-based amorphous nanocrystalline soft magnetic alloy iron core products:

With embodiment 1;

Measured by a vernier caliper: the size of the iron-based amorphous nanocrystalline soft magnetic alloy iron core product obtained in this embodiment is outer diameter × inner diameter × height = D × d × h = Φ30mm × Φ24.92mm × 30mm; according to Jade software Calculation: (Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )90(Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )10The mass fraction of crystalline phase in the amorphous and nanocrystalline thin strip magnet is 78.4%; by MATS-2010SD The magnetic properties of this product measured by the type soft magnetic DC measuring device are: the saturation magnetic induction is 1.32T, and the initial magnetic permeability is 127k.

Example 4

The iron-based amorphous nanocrystalline thin strip magnet of this embodiment has a mass percentage composition expression of AxFy, where the A component is the main alloy A and F of which the atomic percentage composition is Fe _74.5 Cu _1.5 V _2.7 Si _11.5 B _9.8 The component is an amorphous thin strip F corresponding to the composition of the main alloy A of the A component, and the mass percentage of the crystalline phase contained therein is 12.5%; the composition mass percentage x of the A component is 70, and the composition of the F component The mass percentage y is 30.

The preparation method of the above-mentioned iron-based amorphous nanocrystalline thin strip magnet, the steps are as follows:

The first step is to prepare raw materials:

Calculate the mass of each element according to the composition formula Fe _74.5 Cu _1.5 V _2.7 Si _11.5 B _9.8 in atomic percentage, and weigh the required raw materials: ferrovanadium, ferroboron, pure silicon, pure copper and pure iron to complete the preparation of raw materials;

The second step is to prepare Fe _74.5 Cu _1.5 V _2.7 Si _11.5 B _9.8 main alloy A ingot:

Add the raw materials prepared in the first step above into the smelting furnace, evacuate the furnace body to a vacuum degree of <5×10 ^-1 Pa, heat and melt until all the raw materials added are melted and the ingredients are evenly distributed, and then the melted Slagging and slag removal, and finally poured into a mold for cooling to obtain a main alloy A ingot with an atomic percentage composition of Fe _74.5 Cu _1.5 V _2.7 Si _11.5 B _9.8 ;

The third step is to prepare Fe _74.5 Cu _1.5 V _2.7 Si _11.5 B _9.8 amorphous ribbon F:

Put the main alloy A ingot of Fe _74.5 Cu _1.5 V _2.7 Si _11.5 B _9.8 obtained in the second step above into the melt quenching furnace, and melt it on the copper roller at a line speed of 40m/s after remelting Bulk rapid quenching, thus obtaining Fe _74.5 Cu _1.5 V _2.7 Si _11.5 B _9.8 amorphous ribbon F;

The fourth step is to prepare iron-based amorphous and nanocrystalline thin strip magnets:

Put the main alloy A ingot of Fe _74.5 Cu _1.5 V _2.7 Si _11.5 B _9.8 prepared in the second step above into the remelting furnace for melting, and melt evenly until 15 minutes before it is released from the furnace. Fe _74.5 Cu _1.5 V _2.7 prepared in the third step above The Si _11.5 B _9.8 amorphous ribbon F is expressed by mass percentage as AxFy=(Fe _74.5 Cu _1.5 V _2.7 Si _11.5 B _9.8 )70(Fe _74.5 Cu _1.5 V _2.7 Si _11.5 B _9.8 )30 The composition mass percentage is added Remelt the homogeneous Fe _74.5 Cu _1.5 V _2.7 Si _11.5 B _9.8 master alloy A ingot melt, and then mix (Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 )70(Fe _74.5 Cu _1.5 Nb _2.7 Si _11.5 B _9.8 ) 30 molten slag, in the atmosphere at a speed of 40m / s to spray tape, that is, the iron-based amorphous nanocrystalline thin strip magnets.

Measured by a vernier caliper and a micrometer: the thickness of the iron-based amorphous nanocrystalline thin strip magnet prepared in this embodiment is 25 μm, and the bandwidth is 10 mm; calculated according to Jade software, the mass fraction of the crystalline phase in the amorphous thin strip F is 12.5 %.

The application method of the above-mentioned iron-based amorphous nanocrystalline thin strip magnet is used to prepare iron-based amorphous nanocrystalline soft magnetic alloy iron core products, and the steps are as follows:

The first step is to prepare the iron-based amorphous iron core:

The iron-based amorphous nanocrystalline thin-ribbon magnet obtained by the above method for preparing the iron-based amorphous nanocrystalline thin-ribbon magnet is rolled into an iron-based amorphous iron core of corresponding specifications by a winding machine;

The second step is to prepare iron-based amorphous nanocrystalline soft magnetic alloy iron core products:

Put the iron-based amorphous iron core prepared in the first step above into an annealing furnace, and anneal at 540°C to obtain nanocrystals uniformly distributed on the amorphous matrix, that is, to obtain iron-based amorphous nanocrystalline soft magnetic Alloy core products.

Measured by a vernier caliper: the size of the iron-based amorphous nanocrystalline soft magnetic alloy iron core product obtained in this embodiment is outer diameter × inner diameter × height = D × d × h = Φ30mm × Φ24.92mm × 10mm; according to Jade software Calculation: The mass fraction of crystalline phase in (Fe _74.5 Cu _1.5 V _2.7 Si _11.5 B _9.8 )70(Fe _74.5 Cu _1.5 V _2.7 Si _11.5 B _9.8 )30 amorphous nanocrystalline thin strip magnet is 84.5%; by MATS-2010SD The magnetic properties of this product measured by the type soft magnetic DC measuring device are: the saturation magnetic induction is 1.32T, and the initial magnetic permeability is 138k.

Example 5

The iron-based amorphous nanocrystalline thin strip magnet of this embodiment has a mass percentage composition expression of AxFy, where the A component is the main alloy A and F of which the atomic percentage composition is Fe _74.5 Cu _1.5 Mo _2.7 Si _11.5 B _9.8 The component is an amorphous thin strip F corresponding to the composition of the main alloy A of the A component, and the mass percentage of the crystalline phase contained therein is 11.6%; the composition mass percentage x of the A component is 70, and the composition of the F component The mass percentage y is 30.

The preparation method of the above-mentioned iron-based amorphous nanocrystalline thin strip magnet, the steps are as follows:

The first step is to prepare raw materials:

Calculate the mass of each element according to the composition formula Fe _74.5 Cu _1.5 Mo _2.7 Si _11.5 B _9.8 in atomic percentage, and weigh the required raw materials: ferrovanadium, ferroboron, pure silicon, pure copper and pure iron to complete the preparation of raw materials;

The second step is to prepare Fe _74.5 Cu _1.5 Mo _2.7 Si _11.5 B _9.8 main alloy A ingot:

Add the raw materials prepared in the first step above into the smelting furnace, evacuate the furnace body to a vacuum degree of <5×10 ^-1 Pa, heat and melt until all the raw materials added are melted and the ingredients are evenly distributed, and then the melted Slag removal and slag removal, and finally poured into a mold for cooling to obtain a main alloy A ingot with an atomic percentage composition of Fe _74.5 Cu _1.5 Mo _2.7 Si _11.5 B _9.8 ;

The third step is to prepare Fe _74.5 Cu _1.5 Mo _2.7 Si _11.5 B _9.8 amorphous ribbon F:

Put the main alloy A ingot of Fe _74.5 Cu _1.5 Mo _2.7 Si _11.5 B _9.8 obtained in the second step above into the melt quenching furnace, and melt it on the copper roller at a line speed of 40m/s after remelting Bulk rapid quenching, thus producing Fe _74.5 Cu _1.5 Mo _2.7 Si _11.5 B _9.8 amorphous ribbon F;

The fourth step is to prepare iron-based amorphous and nanocrystalline thin strip magnets:

Put the main alloy A ingot of Fe _74.5 Cu _1.5 Mo _2.7 Si _11.5 B _9.8 prepared in the second step above into the remelting furnace for melting, and melt evenly until 15 minutes before it is released from the furnace. Fe _74.5 Cu _1.5 Mo _2.7 prepared in the third step above The Si _11.5 B _9.8 amorphous ribbon F is expressed in terms of mass percentage as AxFy=(Fe _74.5 Cu _1.5 Mo _2.7 Si _11.5 B _9.8 )70(Fe _74.5 Cu _1.5 Mo _2.7 Si _11.5 B _9.8 )30 The mass percentage of the composition is added Remelt the homogeneous Fe _74.5 Cu _1.5 Mo _2.7 Si _11.5 B _9.8 master alloy A ingot melt, and then mix (Fe _74.5 Cu _1.5 Mo _2.7 Si _11.5 B _9.8 )70(Fe _74.5 Cu _1.5 Mo _2.7 Si _11.5 B _9.8 ) 30 molten slag, in the atmosphere at a speed of 40m / s to spray tape, that is, the iron-based amorphous nanocrystalline thin strip magnets.

Measured by a vernier caliper and a micrometer: the thickness of the iron-based amorphous nanocrystalline thin strip magnet prepared in this embodiment is 25 μm, and the bandwidth is 40 mm; calculated according to Jade software, the mass fraction of the crystalline phase in the amorphous thin strip F is 11.6 %.

The application method of the above-mentioned iron-based amorphous nanocrystalline thin strip magnet is used to prepare iron-based amorphous nanocrystalline soft magnetic alloy iron core products, and the steps are as follows:

The first step is to prepare the iron-based amorphous iron core:

The iron-based amorphous nanocrystalline thin-ribbon magnet obtained by the above method for preparing the iron-based amorphous nanocrystalline thin-ribbon magnet is rolled into an iron-based amorphous iron core of corresponding specifications by a winding machine;

The second step is to prepare iron-based amorphous nanocrystalline soft magnetic alloy iron core products:

Put the iron-based amorphous iron core prepared in the first step above into an annealing furnace, and anneal at 540°C to obtain nanocrystals uniformly distributed on the amorphous matrix, that is, to obtain iron-based amorphous nanocrystalline soft magnetic Alloy core products.

Measured by a vernier caliper: the size of the iron-based amorphous nanocrystalline soft magnetic alloy iron core product obtained in this embodiment is outer diameter × inner diameter × height = D × d × h = Φ30mm × Φ24.92mm × 40mm; according to Jade software Calculation: The mass fraction of crystalline phase in (Fe _74.5 Cu _1.5 Mo _2.7 Si _11.5 B _9.8 )70(Fe _74.5 Cu _1.5 Mo _2.7 Si _11.5 B _9.8 )30 amorphous nanocrystalline thin strip magnet is 82.3%; by MATS-2010SD The magnetic properties of this product measured by the type soft magnetic DC measuring device are: the saturation magnetic induction is 1.28T, and the initial magnetic permeability is 132k.

Example 6

The iron-based amorphous nanocrystalline thin strip magnet of this embodiment has a mass percentage composition expression of AxFy, where the A component is the main alloy A with an atomic percentage composition of Fe _72.5 Cu _1.2 Nb ₂ V _1.5 Si _14.5 B _8.3 , the F component is an amorphous thin strip F corresponding to the composition of the main alloy A of the A component, and the mass percentage of the crystalline phase contained in it is 5.5%; the composition mass percentage x of the A component is 70, and the F component The composition mass percentage y is 30.

The preparation method of the above-mentioned iron-based amorphous nanocrystalline thin strip magnet, the steps are as follows:

The first step is to prepare raw materials:

The composition formula in atomic percentage is Fe _72.5 Cu _1.2 Nb ₂ V _1.5 Si _14.5 B _8.3 Calculate the mass of each element, weigh the required raw materials: ferroniobium, ferroboron, ferrovanadium, pure silicon, pure copper and pure iron, and complete the raw materials preparation;

The second step is to prepare Fe _72.5 Cu _1.2 Nb ₂ V _1.5 Si _14.5 B _8.3 main alloy A ingot:

Add the raw materials prepared in the first step above into the smelting furnace, evacuate the furnace body to a vacuum degree of <5×10 ^-1 Pa, heat and melt until all the raw materials added are melted and the ingredients are evenly distributed, and then the melted Slagging and slag removal, and finally poured into a mold for cooling to obtain a main alloy A ingot with an atomic percentage composition of Fe _72.5 Cu _1.2 Nb ₂ V _1.5 Si _14.5 B _8.3 ;

The third step is to prepare Fe _72.5 Cu _1.2 Nb ₂ V _1.5 Si _14.5 B _8.3 thin amorphous ribbon F:

Put the ingot of Fe _72.5 Cu _1.2 Nb ₂ V _1.5 Si _14.5 B _8.3 main alloy A obtained in the second step above into the melt rapid quenching furnace, and re-melt it on the copper roller at a line speed of 45m/s Rapid quenching of the melt, thus producing Fe _72.5 Cu _1.2 Nb ₂ V _1.5 Si _14.5 B _8.3 amorphous ribbon F;

The fourth step is to prepare iron-based amorphous and nanocrystalline thin strip magnets:

Put the ingot of Fe _72.5 Cu _1.2 Nb ₂ V _1.5 Si _14.5 B _8.3 main alloy A prepared in the second step above into the remelting furnace and melt it, and melt it _{evenly .} The composition expression of ₂ V _1.5 Si _14.5 B _8.3 amorphous ribbon F in terms of mass percentage is AxFy=(Fe _72.5 Cu _1.2 Nb ₂ V _1.5 Si _14.5 B _8.3 )70(Fe _72.5 Cu _1.2 Nb ₂ V _1.5 Si _14.5 B _8.3 ) The mass percentage of the composition in 30 is added to the melt of the main alloy A ingot of remelted uniform Fe _72.5 Cu _1.2 Nb ₂ V _1.5 Si _14.5 B _8.3 , and then the mixed (Fe _72.5 Cu _1.2 Nb ₂ V _1.5 Si _14.5 B _8.3 )70(Fe _72.5 Cu _1.2 Nb ₂ V _1.5 Si _14.5 B _8.3 )30 melt is slag-stripped, and sprayed in the atmosphere at a speed of 20m/s to obtain an iron-based amorphous and nanocrystalline thin-ribbon magnet.

Measured by a vernier caliper and a micrometer: the thickness of the iron-based amorphous nanocrystalline thin strip magnet prepared in this embodiment is 35 μm, and the bandwidth is 40 mm; calculated according to Jade software: the mass fraction of the crystalline phase in the amorphous thin strip F is 5.5 %.

The application method of the above-mentioned iron-based amorphous nanocrystalline thin strip magnet is used to prepare iron-based amorphous nanocrystalline soft magnetic alloy iron core products, and the steps are as follows:

The first step is to prepare the iron-based amorphous iron core:

The iron-based amorphous nanocrystalline thin-ribbon magnet obtained by the above method for preparing the iron-based amorphous nanocrystalline thin-ribbon magnet is rolled into an iron-based amorphous iron core of corresponding specifications by a winding machine;

The second step is to prepare iron-based amorphous nanocrystalline soft magnetic alloy iron core products:

Put the iron-based amorphous iron core rolled in the first step above into an annealing furnace, and anneal at 560°C to obtain nanocrystals uniformly distributed on the amorphous matrix, that is, to obtain iron-based amorphous nanocrystalline soft magnetic Alloy core products.

Measured by a vernier caliper: the size of the iron-based amorphous nanocrystalline soft magnetic alloy iron core product obtained in this embodiment is outer diameter × inner diameter × height = D × d × h = Φ30mm × Φ24.92mm × 40mm; according to Jade software Calculation: The mass fraction of crystalline phase in (Fe _72.5 Cu _1.2 Nb ₂ V _1.5 Si _14.5 B _8.3 )70(Fe _72.5 Cu _1.2 Nb ₂ V _1.5 Si _14.5 B _8.3 )30 Fe-based amorphous nanocrystalline thin strip magnet is 83.3 %; The magnetic properties of this product are measured by the MATS-2010SD soft magnetic DC measuring device: the saturation magnetic induction is 1.41T, and the initial magnetic permeability is 146k.

Example 7

The iron-based amorphous nanocrystalline thin strip magnet of this embodiment has a mass percentage composition expression of AxFy, where the A component is the main alloy A with an atomic percentage composition of Fe _72.5 Cu _1.2 Nb ₂ Mo _1.5 Si _14.5 B _8.3 , the F component is an amorphous thin strip F corresponding to the composition of the main alloy A of the A component, and the mass percentage of the crystalline phase contained in it is 2.0%; the composition mass percentage of the A component is 70, and the F component Composition mass percentage y is 30.

The preparation method of the above-mentioned iron-based amorphous nanocrystalline thin strip magnet, the steps are as follows:

The first step is to prepare raw materials:

The composition formula in atomic percentage is Fe _72.5 Cu _1.2 Nb ₂ Mo _1.5 Si _14.5 B _8.3 Calculate the mass of each element, weigh the required raw materials: ferroniobium, ferroboron, ferromolybdenum, pure silicon, pure copper and pure iron, and complete the raw materials preparation;

The second step is to prepare Fe _72.5 Cu _1.2 Nb ₂ Mo _1.5 Si _14.5 B _8.3 main alloy A ingot:

Add the raw materials prepared in the first step above into the smelting furnace, evacuate the furnace body to a vacuum degree of <5×10 ^-1 Pa, heat and melt until all the raw materials added are melted and the ingredients are evenly distributed, and then the melted Slag removal and slag removal, and finally poured into a mold for cooling to obtain a main alloy A ingot with an atomic percentage composition of Fe _72.5 Cu _1.2 Nb ₂ Mo _1.5 Si _14.5 B _8.3 ;

The third step is to prepare Fe _72.5 Cu _1.2 Nb ₂ Mo _1.5 Si _14.5 B _8.3 thin amorphous ribbon F:

Put the ingot of Fe _72.5 Cu _1.2 Nb ₂ Mo _1.5 Si _14.5 B _8.3 main alloy A obtained in the second step above into the melt quenching furnace, re-melt it on the copper roller at a line speed of 45m/s Rapid quenching of the melt, thus producing Fe _72.5 Cu _1.2 Nb ₂ Mo _1.5 Si _14.5 B _8.3 amorphous ribbon F;

The fourth step is to prepare iron-based amorphous and nanocrystalline thin strip magnets:

Put the ingot of Fe _72.5 Cu _1.2 Nb ₂ Mo _1.5 Si _14.5 B _8.3 main alloy A prepared in the second step above into the remelting furnace and melt it, and melt it _{evenly . 2} Mo _1.5 Si _14.5 B _8.3 Amorphous ribbon F is expressed in mass percent as AxFy=(Fe _72.5 Cu _1.2 Nb ₂ Mo _1.5 Si _14.5 B _8.3 )70(Fe _72.5 Cu _1.2 Nb ₂ Mo _1.5 Si _14.5 B _8.3 ) The mass percentage of the composition in 30 is added to the melt of the main alloy A ingot of remelted uniform Fe _72.5 Cu _1.2 Nb ₂ Mo _1.5 Si _14.5 B _8.3 , and then the mixed (Fe _72.5 Cu _1.2 Nb ₂ Mo _1.5 Si _14.5 B _8.3 )70(Fe _72.5 Cu _1.2 Nb ₂ Mo _1.5 Si _14.5 B _8.3 )30 melt is slag-stripped, and sprayed with a speed of 20m/s in the atmosphere to obtain an iron-based amorphous nanocrystalline thin-ribbon magnet.

Measured by a vernier caliper and a micrometer: the thickness of the iron-based amorphous nanocrystalline thin strip magnet prepared in this embodiment is 35 μm, and the bandwidth is 40 mm; calculated according to Jade software, the mass fraction of the crystalline phase in the amorphous thin strip F is 2.0 %.

The application method of the above-mentioned iron-based amorphous nanocrystalline thin strip magnet is used to prepare iron-based amorphous nanocrystalline soft magnetic alloy iron core products, and the steps are as follows:

The first step is to prepare the iron-based amorphous iron core:

The iron-based amorphous nanocrystalline thin-ribbon magnet obtained by the above method for preparing the iron-based amorphous nanocrystalline thin-ribbon magnet is rolled into an iron-based amorphous iron core of corresponding specifications by a winding machine;

The second step is to prepare iron-based amorphous nanocrystalline soft magnetic alloy iron core products:

Put the iron-based amorphous iron core rolled in the first step above into an annealing furnace, and anneal at 560°C to obtain nanocrystals uniformly distributed on the amorphous matrix, that is, to obtain iron-based amorphous nanocrystalline soft magnetic Alloy core products.

Measured by a vernier caliper: the size of the iron-based amorphous nanocrystalline soft magnetic alloy iron core product obtained in this embodiment is outer diameter × inner diameter × height = D × d × h = Φ30mm × Φ24.92mm × 40mm; according to Jade software Calculation: the mass fraction of crystalline phase in (Fe _72.5 Cu _1.2 Nb ₂ Mo _1.5 Si _14.5 B _8.3 )70(Fe _72.5 Cu _1.2 Nb ₂ Mo _1.5 Si _14.5 B _8.3 )30 amorphous nanocrystalline thin strip magnet is 81.6%; The magnetic properties of this product are measured by the MATS-2010SD soft magnetic DC measuring device: the saturation magnetic induction is 1.38T, and the initial magnetic permeability is 137k.

Example 8

The iron-based amorphous nanocrystalline thin strip magnet of this embodiment has a mass percentage composition expression of AxFy, where the A component is the main alloy A and F of which the atomic percentage composition is Fe ₇₀ Cu ₁ Nb _2.5 Si ₁₂ B _14.5 The component is an amorphous thin strip F corresponding to the composition of the main alloy A of the A component, and the mass percentage of the crystalline phase contained therein is 30.0%; the composition mass percentage x of the A component is 70, and the composition of the F component The mass percentage y is 30.

The first step is to prepare raw materials:

Calculate the mass of each element according to the composition formula Fe ₇₀ Cu ₁ Nb _2.5 Si ₁₂ B _14.5 in atomic percentage, and weigh the required raw materials: ferroniobium, ferroboron, pure silicon, pure copper and pure iron to complete the preparation of raw materials;

The second step is to prepare Fe ₇₀ Cu ₁ Nb _2.5 Si ₁₂ B _14.5 main alloy A ingot:

Add the raw materials prepared in the first step above into the smelting furnace, evacuate the furnace body to a vacuum degree of <5×10 ^-1 Pa, heat and melt until all the raw materials added are melted and the ingredients are evenly distributed, and then the melted Slag removal and slag removal, and finally poured into a mold for cooling to obtain a main alloy A ingot with an atomic percentage composition of Fe ₇₀ Cu ₁ Nb _2.5 Si ₁₂ B _14.5 ;

The third step is to prepare Fe ₇₀ Cu ₁ Nb _2.5 Si ₁₂ B _14.5 amorphous ribbon F:

Put the Fe ₇₀ Cu ₁ Nb _2.5 Si ₁₂ B _14.5 main alloy A ingot obtained in the second step above into the melt quenching furnace, and melt it on the copper roller at a line speed of 20m/s after remelting Rapid quenching, thus producing Fe ₇₀ Cu ₁ Nb _2.5 Si ₁₂ B _14.5 amorphous ribbon F;

The fourth step is to prepare iron-based amorphous and nanocrystalline thin strip magnets:

Put the ingot of Fe ₇₀ Cu ₁ Nb _2.5 Si ₁₂ B _14.5 main alloy A prepared in the second step above into the remelting furnace to melt, melt evenly and wait for 20 minutes before being released from the furnace to melt the Fe ₇₀ Cu ₁ Nb _2.5 Si prepared in the third step above ₁₂ B _14.5 Amorphous Ribbon F is expressed in mass percentage as AxFy=(Fe ₇₀ Cu ₁ Nb _2.5 Si ₁₂ B _14.5 )70(Fe ₇₀ Cu ₁ Nb _2.5 Si ₁₂ B _14.5 ) Melt homogeneous Fe ₇₀ Cu ₁ Nb _2.5 Si ₁₂ B _14.5 main alloy A ingot melt, and then mix (Fe ₇₀ Cu ₁ Nb _2.5 Si ₁₂ B _14.5 )70(Fe ₇₀ Cu ₁ Nb _2.5 Si ₁₂ B _14.5 ) Slagging the 30% melt, and spraying strips in the atmosphere at a speed of 30m/s to obtain an iron-based amorphous and nanocrystalline thin-strip magnet.

Measured by a vernier caliper and a micrometer: the thickness of the iron-based amorphous nanocrystalline thin strip magnet prepared in this embodiment is 30 μm, and the bandwidth is 20 mm; calculated according to Jade software: the mass fraction of the crystalline phase in the amorphous thin strip F is 30.0 %.

The application method of the above-mentioned iron-based amorphous nanocrystalline thin strip magnet is used to prepare iron-based amorphous nanocrystalline soft magnetic alloy iron core products, and the steps are as follows:

The first step is to prepare the iron-based amorphous iron core:

The iron-based amorphous nanocrystalline thin-ribbon magnet obtained by the above method for preparing the iron-based amorphous nanocrystalline thin-ribbon magnet is rolled into an iron-based amorphous iron core of corresponding specifications by a winding machine;

The second step is to prepare iron-based amorphous nanocrystalline soft magnetic alloy iron core products:

Put the iron-based amorphous iron core rolled in the first step above into an annealing furnace, and anneal at 580°C to obtain nanocrystals uniformly distributed on the amorphous matrix, that is, to obtain iron-based amorphous nanocrystalline soft magnetic Alloy core products.

Measured by a vernier caliper: the size of the iron-based amorphous nanocrystalline soft magnetic alloy iron core product obtained in this embodiment is outer diameter × inner diameter × height = D × d × h = Φ30mm × Φ24.92mm × 20mm; according to Jade software Calculation: The mass fraction of crystalline phase in (Fe ₇₀ Cu ₁ Nb _2.5 Si ₁₂ B _14.5 )70(Fe ₇₀ Cu ₁ Nb _2.5 Si ₁₂ B _14.5 )30 Fe-based amorphous nanocrystalline thin strip magnet is 86.2%; by MATS -2010SD type soft magnetic DC measuring device measures the magnetic properties of this product: the saturation magnetic induction is 1.26T, and the initial permeability is 125k.

Claims (4)

1. iron-based amorphous nanometer crystalline thin strip magnet, it is characterised in that: be Finemet type amorphous nano-crystalline thin strip magnet, quality Percentage forms expression formula as AxFy, and in formula, component A is that atomic percent group becomes Fe_aCu_bM_cSi_dB_eMaster alloying A, wherein M For at least one of Nb, V and Mo element element, a, b, c, d and e indicate the atomic percentage of element composition, 70.0≤a≤ 74.5,1.0≤b≤1.5,2.5≤c≤3.5,11.5≤d≤14.5,8.3≤e≤14.5, and meet a+b+c+d+e=100； F component is amorphous thin ribbon, and constituent is identical as component A master alloying A, and the mass percent range of crystalline phases contained therein is 2.0%~30.0%, the composition mass percent x's of component A limits range as 70≤x≤90, the composition quality percentage of F component Range is limited as 10≤y≤30 than y.

2. iron-based amorphous nanometer crystalline thin strip magnet according to claim 1, it is characterised in that: the iron-based amorphous nanometer crystalline is thin Magnet carrier with a thickness of 25~35 μm, bandwidth is 10~40mm.

3. the preparation method of iron-based amorphous nanometer crystalline thin strip magnet as described in a kind of claim 1, it is characterised in that specific steps It is as follows:

The first step, preparation raw material:

By the composition formula Fe of atomic percentage_aCu_bM_cSi_dB_eCalculate each element quality, wherein M be Nb, V and Mo element in extremely A kind of few element, the atomic percentage of a, b, c, d and e expression element composition, 70.0≤a≤74.5,1.0≤b≤1.5,2.5≤ C≤3.5,11.5≤d≤14.5,8.3≤e≤14.5, and meet a+b+c+d+e=100, weigh required raw material: ferro-niobium, boron Iron, vanadium iron, molybdenum-iron, pure silicon, fine copper and pure iron complete the preparation of raw material；

Second step prepares master alloying A ingot casting:

The raw material that the above-mentioned first step is prepared is added in smelting furnace, is evacuated to vacuum degree < 5 × 10 to furnace body^-1Pa, heating are molten Refining carries out slag hitting and slagging-off to molten liquid later until the whole melting sources being added, and until being uniformly distributed ingredient, Cooling in mold is finally poured into, atomic percent group, which is made, becomes Fe_aCu_bM_cSi_dB_eMaster alloying A ingot casting；

Third step prepares amorphous thin ribbon F:

Master alloying A ingot casting made from above-mentioned second step is fitted into fast melt-quenching furnace, with the linear speed of 20~45m/s after re-melting Degree carries out fast melt-quenching on copper roller, and amorphous thin ribbon F is thus made；

4th step prepares iron-based amorphous nanometer crystalline thin strip magnet:

Master alloying A ingot casting made from above-mentioned second step is put into remelting furnace and is melted, melting uniformly will wait 10~20min before coming out of the stove It is that weight is added in the composition mass percent in AxFy that the amorphous thin ribbon F of above-mentioned third step preparation forms expression formula by mass percentage In the melt for melting uniform master alloying A ingot casting, in AxFy formula, the mass percentage composition x of master alloying A limit range as 70≤ X≤90, the mass percentage composition y's of amorphous thin ribbon F limits range as 10≤y≤30, then to mixed AxFy melt into Row slag hitting carries out spray band in an atmosphere with 20~40m/s speed, obtains iron-based amorphous nanometer crystalline thin strip magnet；

Measured through vernier caliper and micrometer: obtained iron-based amorphous nanometer crystalline thin strip magnet with a thickness of 25~35 μm, band Width is 10~40mm；Calculated according to Jade software: the mass fraction of crystalline phases is 2.0~30.0% in amorphous thin ribbon F.

4. the application method of iron-based amorphous nanometer crystalline thin strip magnet as described in a kind of claim 1, it is characterised in that be used to prepare Iron-based amorphous and nanocrystalline soft magnetic alloy core products, steps are as follows:

The first step prepares Fe-based amorphous iron core:

Iron-based amorphous nanometer crystalline thin strip magnet described in claim 1 is rolled into the iron-based of required dimension by tape handler Amorphous iron core；

Second step prepares iron-based amorphous and nanocrystalline soft magnetic alloy core products:

The above-mentioned first step is rolled up Fe-based amorphous iron core obtained to be put into annealing furnace, anneals, obtains at 540~580 DEG C It is equally distributed nanocrystalline on noncrystal substrate, obtain iron-based amorphous and nanocrystalline soft magnetic alloy core products；

Measured through vernier caliper: the size of obtained iron-based amorphous and nanocrystalline soft magnetic alloy core products be outer diameter × internal diameter × Height=D × d × h=Φ 30mm × Φ 24.92mm × (10~40) mm；It is calculated according to Jade software: the Fe-based amorphous nanometer of AxFy The mass fraction of crystalline phases is 78.4~86.2% in brilliant soft magnetic alloy core product；It is surveyed through MATS-2010SD type soft magnetism direct current Amount device measures the product magnetic property are as follows: saturation induction density is 1.26~1.49T, and initial permeability is 125k~148k.