CN112877616B - Preparation method of low-remanence amorphous nanocrystalline soft magnetic material - Google Patents
Preparation method of low-remanence amorphous nanocrystalline soft magnetic material Download PDFInfo
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Abstract
The invention discloses a preparation method of a low remanence amorphous nanocrystalline soft magnetic material, which comprises the steps of S1 batching; s2, smelting an alloy ingot; s3, preparing an amorphous strip; s4 verifying the amorphous material; s5 annealing to obtain nanocrystalline structure; s6 verifying amorphous crystallization; s7 the magnetization intensity and the coercive force of the amorphous strip obtained in S5 are measured by a vibration sample magnetometer. The amorphous nanocrystalline strip obtains excellent soft magnetic performance after crystallization annealing, the annealing phase is a composite phase consisting of an amorphous phase and a nanocrystalline phase, the saturation magnetic induction intensity of the material is improved by the precipitation of the nanocrystalline phase, the exchange coupling effect between the nanocrystalline phases enables the material to keep smaller coercive force, and meanwhile, the remanence is low, so the amorphous nanocrystalline strip has excellent soft magnetic performance. The low remanence is an important index, and can provide better performance for products in application.
Description
Technical Field
The invention relates to the technical field of soft magnetic materials, in particular to a preparation method of a low-remanence amorphous nanocrystalline soft magnetic material.
Background
At the end of the last 80 s, researchers in japan developed amorphous nanocrystalline soft magnetic materials based on amorphous alloys. The material has high magnetic permeability, saturation magnetization and low coercive force, has excellent high-frequency characteristics, low loss, magnetostriction coefficient and other excellent characteristics, and is called as 'green electronic material in twenty-first century'. The material can replace silicon steel, permalloy and ferrite, can be used as the magnetic core materials of large, medium and small power main transformers, control transformers, filter inductors, energy storage inductors, reactors, accelerators, inductors, magnetic amplifiers and saturable reactors in various forms of high-frequency (20kHz-100kHz) switching power supplies, and EMC filter common mode inductors and differential mode inductors, and can also be widely applied to the magnetic core materials of various types of mutual inductors with different precisions.
In the prior art, an iron-based nanocrystalline soft magnetic alloy exists, the soft magnetic alloy with high saturation induction density is not the best electromagnet material, and low remanence is also an important index. When the electromagnet is released, a larger external force is needed to overcome the attraction formed by the residual magnetism; for a high-remanence-ratio magnetic core for an induction accelerator, the volt-second number of the magnetic core must be larger than the sum of integral of several pulse volt-seconds, so that the cross-sectional area and the number of the magnetic core are increased, and the use efficiency of the magnetic core is greatly reduced; when the iron core of the inductor for metering has residual magnetism, the measurement result is smaller, and the electric energy metering is smaller; if the transformer has residual magnetism, the exciting current is larger and reaches 6-8 times of rated current, and the misoperation of transformer protection is directly caused; the existence of residual magnetism may accelerate the saturation speed of the protection inductor, greatly aggravate the saturation, cause differential protection misoperation and damage the safe and stable operation of the power system. The preparation and the development of the low-remanence soft magnetic material are problems worthy of solution.
Disclosure of Invention
In order to solve the problems, the invention discloses a preparation method and a product of a low-remanence amorphous nanocrystalline soft magnetic material.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the preparation method of the low-remanence amorphous nanocrystalline soft magnetic material comprises the following steps:
s1, batching: fe, Si, B, Nb and Cu are mixed in accordance with FeaSibBcNbdCueProportioning, wherein a, b, c, d and e are atomic percent, a is 100-b-c-d-e, b is 11-14, c is 7-10, d is 1-4, and e is 0.3-2;
s2 smelting of alloy ingot: putting the prepared raw materials of S1 into a high-vacuum melt-spun machine and a water-cooled copper crucible of a button furnace, vacuumizing, then filling high-purity argon gas for protection, carrying out arc melting, and cooling to obtain a button alloy ingot with uniform components; the using equipment is a smelting and melt-spinning integrated furnace, one part of the water-cooled copper crucible is used for smelting by a button furnace, the other part of the water-cooled copper crucible is used for preparing amorphous strips, and a gate valve is arranged between the two parts and can be communicated or separated. The shape of the button alloy ingot is like a button and a hemisphere.
S3 preparation of amorphous strips: crushing the button alloy ingot obtained in the step S2 into alloy blocks, putting the alloy blocks into a quartz tube with a small hole at the lower end, putting the quartz tube into an induction coil of a high-vacuum melt-spun machine, adjusting the alloy blocks in the tube to be within the range of the induction coil, vacuumizing, filling high-purity argon, and heating to melt the alloy blocks; after the alloy blocks are completely melted, filling high-purity argon into a quartz tube for protection, and performing single-roller melt rapid quenching to obtain an amorphous strip; the quartz tube is required to be provided with small holes, and the molten liquid metal can be sprayed on a copper roller rotating at high speed through the small holes under the pressure difference to form an amorphous strip; the alloy block filled in the quartz tube must be placed in the range of the induction coil, and the alloy block cannot be melted beyond the range of the induction coil.
S4 verification of amorphous material: the amorphous strip obtained in S3 is verified to be an amorphous material by X-ray diffraction;
s5 annealing to prepare a nanocrystalline structure: sealing the amorphous strip obtained in S3 in a quartz tube, and vacuumizing to 10 DEG-1And Pa, placing the alloy into a heat treatment furnace for annealing: raising the temperature to 450-; sealing in a quartz tube and vacuumizing to prevent the amorphous strip from being oxidized. Taken together, saturation of the sample after annealingThe higher the magnetization M is, the better the coercivity Hc is, the better the amorphous strip obtained by annealing has higher saturation magnetic induction and smaller coercivity, and simultaneously has low remanence.
S6 verification of amorphous crystallization: verifying whether the amorphous strip obtained by the S5 is crystallized and the crystallization degree by X-ray diffraction; the crystallization degree can be reached when the annealing temperature of the heat treatment reaches more than 500 ℃.
S7 the magnetization and coercive force of the amorphous ribbon obtained in S5 were measured by a Vibrating Sample Magnetometer (VSM).
In the preparation method of the low-remanence amorphous nanocrystalline soft magnetic material, Fe, Si, B, Nb and Cu in step S1 are converted into weight ratio according to atomic percent and mixed to obtain Fe74.8Cu0.3Nb1.9Si14B9Or Fe73.5(SiB)22.5Nb3Cu1。
The preparation method of the low-remanence amorphous nanocrystalline soft magnetic material comprises the step of vacuumizing to 10 in the step S2-4Pa; arc melting is carried out for 5 times.
In the preparation method of the low-remanence amorphous nanocrystalline soft magnetic material, the maximum diameter of the crushed alloy block is less than 15mm in shape in step S3, and the total weight of the crushed alloy block filled in a quartz tube is less than 10 g. The diameter of the alloy block is smaller than that of the quartz tube, and the alloy block can be filled into the tube.
In the preparation method of the low remanence amorphous nanocrystalline soft magnetic material, the specific method for melting the alloy in the induction coil in the step S3 is as follows: vacuum pumping is carried out to 10-3And (4) after Pa, filling high-purity argon to 0.05MPa, and performing high-frequency induction heating.
According to the preparation method of the low-remanence amorphous nanocrystalline soft magnetic material, high-purity argon with the pressure difference of 0.06 +/-0.01 MPa is filled after the alloy in the step S3 is melted; the melt rapid quenching melt spinning speed of the single roller is 50-60 m/s; the width of the obtained amorphous strip is 2-3mm, and the thickness is 20 +/-5 um.
The preparation method of the low-remanence amorphous nanocrystalline soft magnetic material comprises the following steps of annealing in step S5: heating to 520 ℃ and 560 ℃ at the speed of 5-8 ℃/min, and keeping the temperature for 45-75 min.
The temperature can be raised to 535-555 ℃ at a speed of 5-8 ℃/min, and the temperature is maintained for 60 min.
In the preparation method of the low-remanence amorphous nanocrystalline soft magnetic material, the annealing in step S5 is: heating to 520-560 ℃ at the speed of 8 ℃/min: 460 ℃ X1 h, 510 ℃ X1 h, 535 ℃ X1 h, 545 ℃ X1 h, 555 ℃ X1 h, 600 ℃ X1 h, 690 ℃ X1 h.
In the preparation method of the low-remanence amorphous nanocrystalline soft magnetic material, the annealing in step S5 is: heating to a set temperature at a speed of 8 ℃/min: 545 ℃ for 15min, 545 ℃ for 30min and 545 ℃ for 120 min.
In the preparation method of the low-remanence amorphous nanocrystalline soft magnetic material, the concentration of the high-purity argon in the steps S1-S5 is more than 99.99%. Industrial nitrogen or high-purity nitrogen is selected according to actual conditions.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a preparation method of a low-remanence amorphous nanocrystalline soft magnetic material and a product thereof. The precipitation of the nano crystal phase improves the saturation magnetic induction intensity of the material, and the exchange coupling effect between the nano crystal phases enables the material to keep smaller coercive force, so that the amorphous nano crystal soft magnetic material has better soft magnetic comprehensive performance. The low remanence of the amorphous nanocrystalline soft magnetic material prepared by the method is also an important index, and the amorphous nanocrystalline soft magnetic material can provide better performance for equipment in application, and reduce accidents or be easy to overhaul, such as: when the electromagnet is released, a larger external force is needed to overcome the attraction formed by the residual magnetism; the induction accelerator is used for a magnetic core with low remanence ratio, the voltage second number of the magnetic core is less than the sum of the integral of several pulse voltage seconds, the sectional area and the number of the magnetic core are reduced, and the use efficiency of the magnetic core is greatly improved; when the remanence does not exist in the iron core of the sensor for metering or the remanence is low, the deviation between the measurement result and the electric energy metering is small, and the data is more accurate; the low residual magnetism can reduce the exciting current of the transformer, so that the exciting current is in the rated current range, and the false operation of the transformer protection is reduced or eliminated; the power system can prevent the protective inductor from being saturated due to overload, thereby eliminating the false operation of differential protection and ensuring the safe and stable operation of the system.
Drawings
FIG. 1 is an X-ray diffraction pattern of an amorphous material;
FIG. 2 is an X-ray diffraction spectrum (spectrum of b-g amorphous nanocrystal) of annealing at different temperatures for 1 h; wherein: (a)460 ℃, (b)510 ℃, (c)535 ℃, (d)545 ℃, (e)555 ℃, (f)600 ℃, (g)690 ℃.
Detailed Description
Embodiment 1 of the present invention: the preparation method of the low-remanence amorphous nanocrystalline soft magnetic material comprises the following steps:
s1, batching: fe, Si, B, Nb and Cu are mixed in accordance with FeaSibBcNbdCueProportioning according to the weight proportion, wherein a, b, c, d and e are weight percentages to obtain Fe74.8Cu0.3Nb1.9Si14B9；
S2 smelting of alloy ingot: putting the prepared raw materials of S1 into a water-cooled copper crucible of a high-vacuum melt-spun machine and a button furnace, and vacuumizing to 10 DEG C-4Pa, then filling high-purity argon for protection to perform arc melting, repeatedly melting for 5 times, and cooling to obtain button alloy ingots with uniform components;
s3 preparation of amorphous strips: mechanically crushing the alloy ingot obtained in the step S2 into alloy blocks, putting the alloy blocks into a quartz tube with a small hole at the lower end, wherein the diameter of the alloy blocks is 10mm at most, then putting the quartz tube filled with 10g of the alloy blocks into an induction coil of a vacuum melt-spun machine, adjusting the alloy blocks in the tube to be within the range of the induction coil, vacuumizing to 10 DEG-3Introducing high-purity argon to 0.05MPa after Pa, and heating and melting the alloy block by a high-frequency induction power supply; after the alloy blocks are completely melted, filling high-purity argon with the pressure difference of 0.07MPa into the quartz tube for protection, and performing single-roller melt rapid quenching at the strip throwing speed of 50m/s to obtain an amorphous strip with the width of 2mm and the thickness of 20 mu m;
s4 verification of amorphous material: the amorphous strip obtained in the S3 is verified to be an amorphous material through X-ray diffraction; as shown in fig. 1;
s5 annealing to prepare a nanocrystalline structure: sealing the amorphous strip obtained in the step S3 in a quartz tube and vacuumizing to 10 DEG-1And Pa, placing the alloy into a heat treatment furnace for annealing: heating at the speed of 8 ℃/min, preserving heat for a certain time, cooling to 350 ℃ along with the furnace, and then air-cooling, wherein the specific process comprises the following steps:
keeping the temperature at different temperatures for 1 h: 460 ℃ multiplied by 1h, 510 ℃ multiplied by 1h, 535 ℃ multiplied by 1h, 545 ℃ multiplied by 1h, 555 ℃ multiplied by 1h, 600 ℃ multiplied by 1h and 690 ℃ multiplied by 1 h;
s6 verification of amorphous crystallization: verifying whether the amorphous strip obtained by the S5 is crystallized and the crystallization degree by X-ray diffraction;
s7 the magnetization and coercive force of the amorphous ribbon obtained in S5 were measured by a Vibrating Sample Magnetometer (VSM).
Example 2: the preparation method of the low-remanence amorphous nanocrystalline soft magnetic material comprises the following steps:
s1, batching: fe, Si, B, Nb and Cu are mixed in accordance with FeaSibBcNbdCueProportioning according to the weight proportion, wherein a, b, c, d and e are weight percentages to obtain Fe73.5(SiB)22.5Nb3Cu1；
S2 smelting of alloy ingot: putting the prepared raw materials of S1 into a water-cooled copper crucible of a high-vacuum melt-spun machine and a button furnace, and vacuumizing to 10 DEG C-4Pa, then filling high-purity argon for protection to perform arc melting, repeatedly melting for 5 times, and cooling to obtain button alloy ingots with uniform components;
s3 preparation of amorphous strips: mechanically crushing the alloy ingot obtained in the step S2 into alloy blocks, putting the alloy blocks into a quartz tube with a small hole at the lower end, wherein the diameter of the alloy blocks is 15mm at most, then putting the quartz tube filled with 8g of the alloy blocks into an induction coil of a vacuum melt-spun machine, adjusting the alloy blocks in the tube to be within the range of the induction coil, vacuumizing to 10 DEG-3Introducing high-purity argon to 0.05MPa after Pa, and heating and melting the alloy block by a high-frequency induction power supply; after the alloy blocks are completely melted, filling high-purity argon with the pressure difference of 0.05MPa into the quartz tube for protection, and performing single-roller melt rapid quenching at the strip throwing speed of 60m/s to obtain an amorphous strip with the width of 3mm and the thickness of 25 mu m;
s4 verification of amorphous material: the amorphous strip obtained in S3 is verified to be an amorphous material by X-ray diffraction;
s5 annealing to prepare a nanocrystalline structure: sealing the amorphous strip obtained in the step S3 in a quartz tube, and vacuumizing to 10 DEG-1And Pa, placing the alloy into a heat treatment furnace for annealing: heating at the speed of 8 ℃/min, preserving heat for a certain time, cooling to 250 ℃ along with the furnace, and then air-cooling, wherein the specific process comprises the following steps:
keeping the temperature at the same temperature for different time: annealing at 545 deg.C for 15min, at 545 deg.C for 30min, and at 545 deg.C for 120 min;
s6 verification of amorphous crystallization: verifying whether the amorphous strip obtained by the S5 is crystallized and the crystallization degree by X-ray diffraction;
s7 the magnetization and coercive force of the amorphous ribbon obtained in S5 were measured by a Vibrating Sample Magnetometer (VSM).
Example 3: the preparation method of the low-remanence amorphous nanocrystalline soft magnetic material comprises the following steps:
s1, batching: fe, Si, B, Nb and Cu are mixed in accordance with FeaSibBcNbdCueProportioning according to the weight proportion, wherein a, b, c, d and e are weight percentages to obtain Fe73.5(SiB)22.5Nb3Cu1；
S2 smelting of alloy ingot: putting the prepared raw materials of S1 into a water-cooled copper crucible of a high-vacuum melt-spun machine and a button furnace, and vacuumizing to 10 DEG C-4Pa, then filling high-purity argon for protection to perform arc melting, repeatedly melting for 5 times, and cooling to obtain button alloy ingots with uniform components;
s3 preparation of amorphous strips: crushing the alloy ingot obtained in the step S2 into alloy blocks, putting the alloy blocks into a quartz tube with a small hole at the lower end, wherein the diameter of the alloy blocks is 8mm at most, then putting the quartz tube filled with 5g of the alloy blocks into an induction coil of a vacuum melt-spun machine, adjusting the alloy blocks in the tube to be within the range of the induction coil, vacuumizing to 10 DEG-3Introducing high-purity argon to 0.05MPa after Pa, and heating to melt the alloy block; after the alloy blocks are completely melted, filling high-purity argon with the pressure difference of 0.06MPa into the quartz tube for protection, and performing single-roller melt rapid quenching at the melt spinning speed of 55m/s to obtain an amorphous strip with the width of 3mm and the thickness of 15 um;
s4 verification of amorphous material: the amorphous strip obtained in S3 is verified to be an amorphous material by X-ray diffraction;
s5 annealing to prepare a nanocrystalline structure: sealing the amorphous strip obtained in the step S3 in a quartz tube, and vacuumizing to 10 DEG-1And (4) after Pa, placing the blank into a heat treatment furnace for annealing: heating at the speed of 10 ℃/min, preserving heat for a certain time, cooling to 300 ℃ along with the furnace, and then air-cooling, wherein the specific process comprises the following steps:
keeping the temperature at the same temperature for different time: annealing at 545 deg.C for 15min, at 545 deg.C for 30min, and at 545 deg.C for 120 min;
s6 verification of amorphous crystallization: verifying whether the amorphous strip obtained by the S5 is crystallized and the crystallization degree by X-ray diffraction;
s7 the magnetization and coercive force of the amorphous ribbon obtained in S5 were measured by a Vibrating Sample Magnetometer (VSM).
Example 4: the preparation method of the low-remanence amorphous nanocrystalline soft magnetic material comprises the following steps:
s1, batching: fe, Si, B, Nb and Cu are mixed in accordance with FeaSibBcNbdCueProportioning according to the weight proportion, wherein a, b, c, d and e are weight percentages to obtain Fe74.8Cu0.3Nb1.9Si14B9；
S2 smelting of alloy ingot: putting the prepared raw materials of S1 into a water-cooled copper crucible of a high-vacuum melt-spun machine and a button furnace, and vacuumizing to 10 DEG C-4Pa, then filling high-purity argon for protection to perform arc melting, repeatedly melting for 5 times, and cooling to obtain a button alloy ingot with uniform components;
s3 preparation of amorphous strips: crushing the alloy ingot obtained in the step S2 into alloy blocks, putting the alloy blocks into a quartz tube with a small hole at the lower end, wherein the diameter of the alloy blocks is 12mm at most, then putting the quartz tube filled with 10g of the alloy blocks into an induction coil of a vacuum melt-spun machine, adjusting the alloy blocks in the tube to be within the range of the induction coil, vacuumizing to 10 DEG-3Introducing high-purity argon to 0.05MPa after Pa, and heating to melt the alloy blocks; after the alloy blocks are completely melted, filling high-purity argon with the pressure difference of 0.06MPa into the quartz tube for protection, and performing single-roller melt rapid quenching at the melt spinning speed of 55m/s to obtain an amorphous strip with the width of 2mm and the thickness of 22 um;
s4 verification of amorphous material: the amorphous strip obtained in S3 is verified to be an amorphous material by X-ray diffraction;
s5 annealing to prepare a nanocrystalline structure: sealing the amorphous strip obtained in the step S3 in a quartz tube and vacuumizing to 10 DEG-1And Pa, placing the alloy into a heat treatment furnace for annealing: heating at the speed of 5 ℃/min, preserving heat for a certain time, cooling to 280 ℃ along with the furnace, and then air-cooling, wherein the specific process comprises the following steps:
keeping the temperature at different temperatures for 1 h: 460 ℃ multiplied by 1h, 510 ℃ multiplied by 1h, 535 ℃ multiplied by 1h, 545 ℃ multiplied by 1h, 555 ℃ multiplied by 1h, 600 ℃ multiplied by 1h and 690 ℃ multiplied by 1 h;
s6 verification of amorphous crystallization: verifying whether the amorphous strip obtained by the S5 is crystallized and the crystallization degree by X-ray diffraction;
s7 the magnetization and coercive force of the amorphous ribbon obtained in S5 were measured by a Vibrating Sample Magnetometer (VSM).
Experimental example:
firstly, heat preservation at different temperatures for 1h experimental data:
TABLE 5.1 variation of saturation magnetization for annealing at different temperatures
TABLE 5.2 variation of remanent magnetization at different temperatures
TABLE 5.3 coercivity change at different temperature anneals
FIG. 2 is an X-ray diffraction spectrum of annealing at different temperatures for 1 h.
Secondly, keeping the temperature at 545 ℃ for different times:
TABLE 5.4 variation of saturation magnetization at different times of annealing
TABLE 5.5 values of the change in remanent magnetization at different times of annealing
TABLE 5.6 coercivity Change values at different times of annealing
The above experimental results show that the optimal annealing process of the preparation method of the present application is as follows: raising the temperature at the speed of 5-8 ℃/min, preserving the temperature for 45-75min in the range of 520-560 ℃, cooling the temperature to 250 ℃ along with the furnace, and then air-cooling the temperature. The obtained low-remanence amorphous nanocrystalline soft magnetic material has high saturation magnetic induction intensity, low coercive force, low remanence and excellent soft magnetic performance.
Claims (8)
1. The preparation method of the low-remanence amorphous nanocrystalline soft magnetic material is characterized by comprising the following steps:
s1, batching: fe, Si, B, Nb and Cu are mixed in accordance with Fe74.8Cu0.3Nb1.9Si14B9Proportioning materials in proportion;
s2 smelting of alloy ingot: putting the prepared raw materials of S1 into a high-vacuum melt-spun machine and a water-cooled copper crucible of a button furnace, vacuumizing, then filling high-purity argon gas for protection, carrying out arc melting, and cooling to obtain a button alloy ingot with uniform components; the vacuum is pumped to 10-4Pa; arc melting for 5 times;
s3 preparation of amorphous strips: crushing the button alloy ingot obtained in the step S2 into alloy blocks, putting the alloy blocks into a quartz tube with a small hole at the lower end, putting the quartz tube into an induction coil of a high-vacuum melt-spun machine, adjusting the alloy blocks in the tube to be within the range of the induction coil, vacuumizing, filling high-purity argon, and heating to melt the alloy blocks; after the alloy blocks are completely melted, filling high-purity argon into a quartz tube for protection, and performing single-roller melt rapid quenching to obtain an amorphous strip;
s4 verification of amorphous material: the amorphous strip obtained in S3 is verified to be an amorphous material by X-ray diffraction;
s5 annealing to prepare a nanocrystalline structure: sealing the amorphous strip obtained in S3 in a quartz tube, and vacuumizing to 10 DEG-1And Pa, placing the alloy into a heat treatment furnace for annealing: raising the temperature to 450-;
s6 verification of amorphous crystallization: verifying whether the amorphous strip obtained by the S5 is crystallized and the crystallization degree by X-ray diffraction;
s7 the magnetization intensity and the coercive force of the amorphous strip obtained in S5 are measured by a vibration sample magnetometer.
2. The method for preparing the low remanence amorphous nanocrystalline soft magnetic material according to claim 1, characterized in that: and S3, the maximum diameter of the crushed alloy block is less than 15mm, and the total weight of the crushed alloy block filled into the quartz tube is less than 10 g.
3. The method for preparing the low remanence amorphous nanocrystalline soft magnetic material according to claim 1, characterized in that: the specific method for melting the alloy in the induction coil in the step S3 is as follows: vacuum pumping to 10-3And (4) after Pa, filling high-purity argon to 0.05MPa, and performing high-frequency induction heating.
4. The method for preparing the low remanence amorphous nanocrystalline soft magnetic material according to claim 1, characterized in that: after the alloy in the step S3 is melted, filling high-purity argon with the pressure difference of 0.06 +/-0.01 MPa; the melt rapid quenching melt spinning speed of the single roller is 50-60 m/s; the width of the obtained amorphous strip is 2-3mm, and the thickness is 20 +/-5 mu m.
5. The method for preparing the low remanence amorphous nanocrystalline soft magnetic material according to claim 1, characterized in that: annealing in step S5: heating to 520 ℃ and 560 ℃ at the speed of 5-8 ℃/min, and keeping the temperature for 45-75 min.
6. The method for preparing the low remanence amorphous nanocrystalline soft magnetic material according to claim 1, characterized in that: the annealing in the step S5 is: heating to a set temperature at a speed of 8 ℃/min: 460 ℃ X1 h, 510 ℃ X1 h, 535 ℃ X1 h, 545 ℃ X1 h, 555 ℃ X1 h, 600 ℃ X1 h, 690 ℃ X1 h.
7. The method for preparing the low remanence amorphous nanocrystalline soft magnetic material according to claim 1, characterized in that: the annealing in the step S5 is: heating to a set temperature at a speed of 8 ℃/min: 545 ℃ for 15min, 545 ℃ for 30min and 545 ℃ for 120 min.
8. The method for preparing the low remanence amorphous nanocrystalline soft magnetic material according to claim 1, characterized in that: the high-purity argon is more than 99.99 percent in concentration in steps S1-S5.
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