Heat treatment method, system and equipment for regulating and controlling soft magnetic performance and medium

Abstract

The invention discloses a heat treatment method, a heat treatment system, heat treatment equipment and a medium for regulating and controlling soft magnetic performance, and aims to determine an optimized heat treatment temperature range through a large number of experimental researches and theoretical analysis in amorphous magnetically soft alloy researches, specifically, the heat treatment temperature range is determined by testing the relationship between saturation magnetic induction intensity Bs (or saturation magnetization intensity Ms) of amorphous magnetically soft alloy and temperature. According to the method, a Bs (T)-T curve is obtained, a derivative (dBs (T) / dT) of the Bs (T)-T curve is solved, and then an optimized heat treatment temperature range is determined and used for guiding structural relaxation annealing heat treatment of the iron-based soft magnetic amorphous alloy so as to obtain optimized soft magnetic performance. The invention provides a new method for rapidly determining the relaxation annealing temperature and the annealing process of the amorphous magnetically soft alloy structure, which has important significance in determining the relaxation annealing temperature and the annealing process of the iron-based amorphous magnetically soft alloy structure and has important practical value in application of the iron-based amorphous magnetically soft alloy.

Description

Technical Field

[0001] The present invention relates to the technical field of alloy materials, and in particular to a heat treatment method, system, equipment and medium for regulating soft magnetic properties. Background Art

[0002] Amorphous alloy (also known as metallic glass) is a new type of metal material. Compared with traditional crystalline soft magnetic alloy materials, amorphous soft magnetic alloys have high magnetic permeability and low coercivity, and high resistivity, because the atoms of amorphous alloys are disorderly arranged and do not have the anisotropic characteristics of crystals. The core loss after being made into an iron core is much lower than that of traditional silicon steel cores, and it is a soft magnetic material with excellent performance.

[0003] The most widely used amorphous soft magnetic alloy at present is the iron-based amorphous soft magnetic alloy, which is produced by a planar flow casting rapid solidification process of melt spinning. One of the characteristics of this process technology is that the cooling rate from the alloy melt to the solidification process is as high as one million degrees per second. Such a high cooling rate will cause a large thermal stress to be generated in the alloy melt during the rapid cooling and solidification process. Studies have found that this thermal stress will have a great impact on the properties of the alloy. In fact, the various properties of amorphous alloys are often very sensitive to their thermal history: amorphous alloys made at different cooling rates have significant differences in toughness, coercive force, magnetic permeability and other properties. Therefore, in the industrial application of amorphous soft magnetic alloys, it is often necessary to use structural relaxation treatment methods to reduce the influence of the thermal history of amorphous alloys and adjust the fine structure of the amorphous alloy material itself, and at the same time regulate the soft magnetic properties of the alloy.

[0004] At present, the main means of structural relaxation of amorphous alloys is heat treatment, that is, placing the amorphous alloy at a temperature below the crystallization temperature for a certain period of time and then cooling it to room temperature. This heat treatment is usually called structural relaxation annealing. However, due to the low efficiency of heat conduction from the heat treatment device to the amorphous alloy, a longer heat treatment time is usually required to achieve a better structural relaxation effect. At the same time, in application, because the iron core wound or processed by the amorphous alloy strip has a certain size, it takes a certain amount of time to even out the internal and external temperatures during heating. If the annealing time is too short, the internal structure of the iron core will have insufficient relaxation effect. If the annealing time is extended, the external crystallization problem caused by the long annealing time will occur. These will affect the annealing effect and soft magnetic properties of the iron-based amorphous soft magnetic alloy.

[0005] It can be seen that the structural relaxation annealing process will eventually affect the microstructure and soft magnetic properties of amorphous soft magnetic alloys. Therefore, it is necessary to explore a concise and effective new method to determine the structural relaxation annealing process to meet the needs of achieving the structure and performance regulation and engineering application of amorphous soft magnetic alloys. Summary of the invention

[0006] The present invention provides a heat treatment method, system, equipment and medium for regulating soft magnetic properties, which are used to quickly determine the structural relaxation annealing temperature and annealing process of an amorphous soft magnetic alloy, and to guide the structural relaxation annealing heat treatment of an iron-based soft magnetic amorphous alloy to obtain optimized soft magnetic properties.

[0007] In view of this, the first aspect of the present application provides a heat treatment method for regulating soft magnetic properties, the method comprising:

[0008] Obtaining the variation law of the saturation magnetic induction intensity Bs of the amorphous soft magnetic alloy with temperature, obtaining a Bs(T)-T curve, and calculating the variation value of the Bs(T)-T curve with temperature, obtaining a dBs(T) / dT-T curve;

[0009] Based on the Bs(T)-T curve, the Bs value of the amorphous soft magnetic alloy at the preset temperature T1 is obtained, and the temperature value Tai when Bs(T) / Bs(T1)=45% is used as the lower limit temperature of the saturated annealing process of the amorphous soft magnetic alloy;

[0010] Obtaining and analyzing the DSC curve of the amorphous soft magnetic alloy to obtain the initial crystallization temperature Tx and Curie Tc of the amorphous soft magnetic alloy, and determining the upper limit temperature Tco of the annealing process of the amorphous soft magnetic alloy according to the initial crystallization temperature Tx and the Curie Tc, and the dBs(T) / dT-T curve;

[0011] The lower limit temperature is optimized according to the starting crystallization temperature Tx and the Curie Tc to determine the optimized degradation temperature, thereby determining the temperature range of the annealing process of the amorphous soft magnetic alloy according to the upper limit temperature Tco and the optimized degradation temperature, thereby performing structural relaxation annealing heat treatment on the amorphous soft magnetic alloy to obtain optimized soft magnetic properties.

[0012] Optionally, obtaining the variation law of the saturation magnetic induction intensity Bs of the amorphous soft magnetic alloy with temperature to obtain a Bs(T)-T curve includes:

[0013] The amorphous soft magnetic alloy is subjected to a temperature increase treatment and a test using a superconducting quantum interference device to obtain a law of variation of the saturation magnetic induction intensity Bs of the amorphous soft magnetic alloy with temperature, thereby obtaining a Bs(T)-T curve.

[0014] Optionally, the obtaining and analyzing the DSC curve of the amorphous soft magnetic alloy to obtain the initial crystallization temperature Tx and Curie Tc of the amorphous soft magnetic alloy includes:

[0015] The amorphous soft magnetic alloy is tested by using a scanning differential calorimeter (DSC) to obtain a DSC curve of the amorphous soft magnetic alloy, thereby determining the initial crystallization temperature Tx and Curie Tc of the amorphous soft magnetic alloy based on the DSC curve.

[0016] Optionally, determining the upper limit temperature Tco of the annealing process of the amorphous soft magnetic alloy according to the starting crystallization temperature Tx and the Curie Tc, and the dBs(T) / dT-T curve, comprises:

[0017] When the initial crystallization temperature Tx differs from the Curie Tc by a preset temperature value or more, the temperature corresponding to the lowest value in the dBs(T) / dT-T curve is used as the upper limit temperature Tco of the annealing process of the amorphous soft magnetic alloy.

[0018] Optionally, the step of optimizing the lower limit temperature according to the starting crystallization temperature Tx and the Curie Tc to determine an optimized degradation temperature, thereby determining a temperature range of the annealing process of the amorphous soft magnetic alloy according to the upper limit temperature Tco and the optimized degradation temperature, comprises:

[0019] The lower limit temperature is optimized according to the starting crystallization temperature Tx and the Curie Tc, and the optimized degradation temperature is obtained as Ta≥Tc-(Tx-Tc) / 3K. Therefore, according to the upper limit temperature Tco and the optimized degradation temperature, the temperature range of the annealing process of the amorphous soft magnetic alloy is determined to be Tc-(Tx-Tc) / 3K≤Ta<Tco.

[0020] Optionally, performing structural relaxation annealing heat treatment on the amorphous soft magnetic alloy to obtain optimized soft magnetic properties includes:

[0021] Based on the temperature range of the annealing process of the amorphous soft magnetic alloy, the amorphous soft magnetic alloy is subjected to heating, heat preservation and quenching cooling treatment to obtain optimized soft magnetic properties.

[0022] Optionally, it is characterized in that the amorphous soft magnetic alloy comprises: Fe 81.4 B 13.2 C 2.8 Si 1.8 P 0.8 Amorphous alloy and Fe 82.2 B 12.4 C 2.8 Si 1.8 P 0.8 Amorphous alloy.

[0023] A second aspect of the present application provides a heat treatment system for regulating soft magnetic properties, the system comprising:

[0024] The first calculation unit is used to obtain the variation law of the saturation magnetic induction intensity Bs of the amorphous soft magnetic alloy with temperature, obtain the Bs(T)-T curve, and calculate the variation value of the Bs(T)-T curve with temperature to obtain the dBs(T) / dT-T curve;

[0025] A second calculation unit is used to obtain the Bs value of the amorphous soft magnetic alloy at a preset temperature T1 based on the Bs(T)-T curve, and use the temperature value Tai when Bs(T) / Bs(T1)=45% as the lower limit temperature of the saturation annealing process of the amorphous soft magnetic alloy;

[0026] a third calculation unit, configured to obtain and analyze the DSC curve of the amorphous soft magnetic alloy, obtain the initial crystallization temperature Tx and Curie Tc of the amorphous soft magnetic alloy, and determine the upper limit temperature Tco of the annealing process of the amorphous soft magnetic alloy according to the initial crystallization temperature Tx and the Curie Tc, and the dBs(T) / dT-T curve;

[0027] An analysis and processing unit is used to optimize the lower limit temperature according to the starting crystallization temperature Tx and the Curie Tc, determine the optimized degradation temperature, and thus determine the temperature range of the annealing process of the amorphous soft magnetic alloy according to the upper limit temperature Tco and the optimized degradation temperature, so as to perform structural relaxation annealing heat treatment on the amorphous soft magnetic alloy to obtain optimized soft magnetic properties.

[0028] A third aspect of the present invention provides a heat treatment device for regulating soft magnetic properties, the device comprising a processor and a memory:

[0029] The memory is used to store program code and transmit the program code to the processor;

[0030] The processor is used to execute the steps of the heat treatment method for regulating soft magnetic properties as described in the first aspect according to the instructions in the program code.

[0031] A fourth aspect of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium is used to store program codes, and the program codes are used to execute the heat treatment method for regulating soft magnetic properties described in the first aspect.

[0032] It can be seen from the above technical solutions that the present invention has the following advantages:

[0033] The heat treatment method for regulating soft magnetic properties provided by the present invention tests the relationship between the saturation magnetic induction intensity Bs (or saturation magnetization intensity Ms) and temperature of the amorphous soft magnetic alloy, that is, the Bs(T)-T curve, and calculates its derivative (dBs(T) / dT), and then determines the optimized heat treatment temperature range to guide the structural relaxation annealing heat treatment of the iron-based soft magnetic amorphous alloy to obtain optimized soft magnetic properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0035] Figure 1 A schematic flow chart of a heat treatment method for regulating soft magnetic properties provided in an embodiment of the present invention;

[0036] Figure 2 The Fe provided by the embodiment of the present invention 81.4 B 13.2 C 2.8 Si 1.8 P 0.8 and Fe 82.2 B 12.4 C 2.8 Si 1.8 P 0.8 Bs(T)-T curve of the amorphous alloy strip showing the change of Bs(T) with temperature;

[0037] Figure 3 The Fe provided by the embodiment of the present invention 81.4 B 13.2 C 2.8 Si 1.8 P 0.8 and Fe 82.2 B 12.4 C 2.8 Si 1.8 P 0.8 The curves showing the variation of Bs(T) / Bs(5K) and dBs(T) / dT of amorphous alloy with increasing temperature;

[0038] Figure 4 A schematic structural diagram of a heat treatment system for regulating soft magnetic properties provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The following is a description of the principles of the present invention:

[0041] In the study of amorphous soft magnetic alloys with high iron content and high saturation magnetic induction, the present invention, based on a large number of experimental studies and combined with theoretical analysis, has discovered a lower limit temperature Tai related to the optimal annealing process range. Annealing temperature Ta should be carried out at a temperature slightly higher than Tai, and even annealing for a longer time can obtain a good annealing effect, that is, the coercive force is significantly reduced. Furthermore, the optimized temperature Ta should be: Ta≥Tc-(Tx-Tc) / 3 (K). The present invention provides a new method for quickly determining the annealing temperature of iron-based soft magnetic amorphous alloys with high iron content, which is of great significance for determining the structural relaxation annealing temperature and annealing process of iron-based amorphous soft magnetic alloys, and has important practical value for the application of iron-based amorphous soft magnetic alloys.

[0042] Through in-depth research, the present invention proposes a new heat treatment process combination for obtaining excellent soft magnetic properties, especially obtaining amorphous soft magnetic alloy materials with low coercivity and low core loss. That is, after obtaining the optimized heat treatment annealing temperature Ta:

[0043] 1) At Ta temperature, the cast amorphous soft magnetic alloy material is placed in a heat treatment furnace at Ta temperature. After keeping warm for 1-2 hours, the heat-treated soft magnetic material is placed in a quenching liquid and quickly cooled to room temperature to obtain relatively excellent soft magnetic properties;

[0044] 2) At Ta temperature, the cast amorphous soft magnetic alloy material is placed in a heat treatment furnace at Ta temperature. After keeping warm for 1-2 hours, the heat-treated soft magnetic material is cooled with the furnace or slowly cooled to room temperature. This is not conducive to obtaining low coercive force and low core loss - that is, slow cooling deteriorates the soft magnetic properties;

[0045] 3) If the amorphous soft magnetic alloy is placed in a heat treatment furnace at a temperature of (Ta-100k) or below, and then the furnace temperature is raised to below Ta, and kept warm for 1-2 hours, the amorphous soft magnetic material is placed in a quenching liquid and quickly cooled to room temperature, relatively excellent soft magnetic properties can be obtained;

[0046] 4) If the amorphous soft magnetic alloy is placed in a heat treatment furnace at a temperature of (Ta-100k) or below, and then the furnace temperature is raised to temperature Ta, and kept at this temperature for 1-2 hours, and then the amorphous soft magnetic material is cooled to room temperature or slowly cooled to room temperature along with the furnace, relatively excellent soft magnetic properties can be obtained - that is, slow heating can reduce or even offset the adverse effects of slow cooling on the soft magnetic properties.

[0047] Embodiment 1:

[0048] See also Figure 1 , a heat treatment method for regulating soft magnetic properties provided in an embodiment of the present invention comprises:

[0049] Step 101, obtain the variation law of the saturation magnetic flux density Bs of the amorphous soft magnetic alloy with temperature, obtain the Bs(T)-T curve, and calculate the variation value of the Bs(T)-T curve with temperature to obtain the dBs(T) / dT-T curve.

[0050] Step 102, based on the Bs(T)-T curve, obtain the Bs value of the amorphous soft magnetic alloy at the preset temperature T1, and use the temperature value Tai when Bs(T) / Bs(T1)=45% as the lower limit temperature of the saturation annealing process of the amorphous soft magnetic alloy.

[0051] Step 103, obtain the DSC curve of the amorphous soft magnetic alloy and analyze it to obtain the initial crystallization temperature Tx and Curie Tc of the amorphous soft magnetic alloy, and determine the upper limit temperature Tco of the annealing process of the amorphous soft magnetic alloy according to the initial crystallization temperature Tx and Curie Tc, and the dBs(T) / dT-T curve.

[0052] Step 104, optimize the lower limit temperature according to the initial crystallization temperature Tx and Curie Tc, determine the optimized degradation temperature, and then determine the temperature range of the annealing process of the amorphous soft magnetic alloy according to the upper limit temperature Tco and the optimized degradation temperature, so as to perform structural relaxation annealing heat treatment on the amorphous soft magnetic alloy to obtain optimized soft magnetic properties.

[0053] In one embodiment, in step 101, obtaining the variation law of the saturation magnetic induction intensity Bs of the amorphous soft magnetic alloy with temperature to obtain a Bs(T)-T curve includes:

[0054] The amorphous soft magnetic alloy was subjected to temperature treatment and testing using a superconducting quantum interference device, and the variation law of the saturation magnetic induction intensity Bs of the amorphous soft magnetic alloy with temperature was obtained, thereby obtaining the Bs(T)-T curve.

[0055] In one embodiment, step 102 includes:

[0056] The amorphous soft magnetic alloy is tested by a scanning differential calorimeter DSC to obtain the DSC curve of the amorphous soft magnetic alloy, and then the initial crystallization temperature Tx and Curie Tc of the amorphous soft magnetic alloy are determined based on the DSC curve.

[0057] When the initial crystallization temperature Tx differs from the Curie Tc by a preset temperature value or more, the temperature corresponding to the lowest value in the dBs(T) / dT-T curve is used as the upper limit temperature Tco of the annealing process of the amorphous soft magnetic alloy.

[0058] In one embodiment, step 103 includes:

[0059] The lower limit temperature is optimized according to the starting crystallization temperature Tx and Curie Tc, and the optimized degradation temperature is Ta≥Tc-(Tx-Tc) / 3K. Therefore, the temperature range of the annealing process of the amorphous soft magnetic alloy is determined to be Tc-(Tx-Tc) / 3K≤Ta<Tco according to the upper limit temperature Tco and the optimized degradation temperature.

[0060] In one embodiment, in step 104, the amorphous soft magnetic alloy is subjected to a structural relaxation annealing heat treatment to obtain optimized soft magnetic properties, including:

[0061] Based on the temperature range of the annealing process of the amorphous soft magnetic alloy, the amorphous soft magnetic alloy is subjected to heating, heat preservation and quenching cooling treatment to obtain optimized soft magnetic properties.

[0062] In one embodiment, the amorphous soft magnetic alloy comprises: Fe 81.4 B 13.2 C 2.8 Si 1.8 P 0.8 Amorphous alloy and Fe 82.2 B 12.4 C 2.8 Si 1.8 P 0.8 Amorphous alloy.

[0063] The following examples 2 and 3 are respectively Fe 81.4 B 13.2 C 2.8 Si 1.8 P 0.8 Amorphous alloy and Fe 82.2 B 12.4 C 2.8 Si 1.8 P 0.8 For a detailed description of the heat treatment methods for regulating the soft magnetic properties of amorphous alloys, please refer to Figure 2 and Figure 3 .

[0064] in, Figure 3 Tai in the figure is the starting optimized annealing temperature of the alloy, that is, the optimized annealing lower limit temperature. For amorphous alloys whose starting crystallization temperature Tx differs from Curie Tc by more than 100K, the lowest value point (or d 2 Bs / dT 2 =0) are the optimized annealing upper limit temperatures of the alloys. That is, when the annealing temperature is greater than or equal to Tco, the coercivity of the amorphous alloy increases significantly after structural relaxation annealing.

[0065] Embodiment 2:

[0066] In this embodiment, the specific steps of the method are as follows:

[0067] (1) Prepare Fe 81.4 B 13.2 C 2.8 Si 1.8 P 0.8 Amorphous alloy strips were sampled and tested using a superconducting quantum interference magnetometer (SQUID). The sample was placed on the SQUID sample, and the temperature was raised from a low temperature (nearly 4K) to a temperature close to zero or a significant increase in Bs using a heating rate of 10K / min and an external field of 80KA / m. The Bs(T)-T curve was obtained. The dBs(T) / dT-T curve of dBs / dT changing with temperature was calculated;

[0068] (2) Confirm that the temperature Tai value when Bs(T) / Bs(5K)=45% is 620K;

[0069] (3) The amorphous alloy was tested by differential scanning calorimetry (DSC) to confirm that its Curie temperature (TC) and crystallization temperature (Tx) were 661K and 776K, respectively. When the difference between the initial crystallization temperature Tx and the Curie Tc was more than 100K, the lowest dBs / dT value (or d 2 Bs / dT 2 =0) corresponds to the temperature Tco which is the upper limit temperature of isothermal annealing, and the corresponding temperature value for this alloy is 667K.

[0070] (4) Through the DSC curve, it is confirmed that the optimized annealing Ta should be greater than or equal to Tc-(Tx-Tc) / 3K. That is: Tc-(Tx-Tc) / 3K≤Ta<Tco, or 622.7K≤Ta<667K) 623K is used as the annealing temperature Ta, and the annealing heat treatment is carried out at this temperature for 90-330 minutes, and the heating rates are approximately: 100K / min and 5K / min, respectively. After heat preservation, quenching cooling (cooling rate greater than or equal to 850 K / min) and slow cooling (cooling rate less than or equal to 5K / min) are used to 150 degrees and then air-cooled to room temperature. Then the annealed sample is tested for its coercive force Hc and B800 using a BH instrument. The results show that the coercive force is kept below 2A / m, and the B800 is kept above 1.64T, and the soft magnetic properties are excellent. When annealed at 613K (lower than Tai) for 90 minutes, the coercivity was above 4A / m, which was obviously not as good as the soft magnetic properties when annealed at 623K; 2) When isothermal annealing was performed at around 667K (Tco) for 90 minutes, crystallization occurred and the coercivity increased to above 9A / m. Obviously, the annealing temperature cannot be greater than or equal to 667K.

[0071] Embodiment 3:

[0072] In this embodiment, the specific steps of the method are as follows:

[0073] (1) The Fe 82.2 B 12.4 C 2.8 Si 1.8 P 0.8 Amorphous alloy strips were sampled and tested using a superconducting quantum interference magnetometer (SQUID). The sample was placed on the SQUID sample, and the temperature was raised from a low temperature (nearly 4K) to Bs or Bs obviously increased using a heating rate of 10K / min and an external field of 80KA / m. The Bs(T)-T curve was obtained. The dBs(T) / dT-T curve of dBs / dT changing with temperature was calculated;

[0074] (2) Confirm that the temperature Tai value when Bs(T) / Bs(5K)=45% is 589K;

[0075] (3) The amorphous alloy was tested by differential scanning calorimetry (DSC) to confirm that its Curie temperature (TC) and crystallization temperature (Tx) were 635K and 765K, respectively. When the difference between the initial crystallization temperature Tx and the Curie Tc was more than 100K, the lowest dBs / dT value (or d 2 Bs / dT 2 =0) corresponds to the temperature Tco which is the upper limit temperature of isothermal annealing, and the corresponding temperature value for this alloy is 637K.

[0076] (4) Through the DSC curve, it is confirmed that the optimized Ta should satisfy: Ta ≥ Tc-(Tx-Tc) / 3K and Ta is less than Tco. That is: Tc-(Tx-Tc) / 3≤Ta<TcoK, or 591.7K≤Ta<667K. Based on this, 1) annealing heat treatment was carried out at 593K for 90-330 minutes, and the heating rates were approximately: 100K / min and 5K / min, respectively. After heat preservation, quenching cooling (cooling rate greater than or equal to 850K / min) and slow cooling (cooling rate less than or equal to 5K / min) were used to 150 degrees and then air-cooled to room temperature. Then the annealed sample was tested for its coercive force Hc and B800 using a BH instrument. The results showed that the coercive force remained below 2A / m and B800 remained above 1.65T. The soft magnetic properties are excellent. However, after annealing at 583K for 90 minutes, the coercivity is about 4A / m, which is obviously not as good as the soft magnetic properties when annealed at 593K; 2) If isothermal annealing is performed at around 637K (Tco) for 90 minutes, crystallization occurs, and the coercivity increases to more than 7A / m. Obviously, the annealing temperature cannot be higher than 637K.

[0077] The heat treatment method for regulating soft magnetic properties provided by the present invention tests the relationship between the saturation magnetic induction intensity Bs (or saturation magnetization intensity Ms) and temperature of the amorphous soft magnetic alloy, that is, the Bs(T)-T curve, and calculates its derivative (dBs(T) / dT), and then determines the optimized heat treatment temperature range to guide the structural relaxation annealing heat treatment of the iron-based soft magnetic amorphous alloy to obtain optimized soft magnetic properties.

[0078] The above is a heat treatment method for regulating soft magnetic properties provided in an embodiment of the present invention, and the following is a heat treatment system for regulating soft magnetic properties provided in an embodiment of the present invention.

[0079] See also Figure 4 , a heat treatment system for regulating soft magnetic properties provided in an embodiment of the present invention comprises:

[0080] The first calculation unit 201 is used to obtain the variation law of the saturation magnetic induction intensity Bs of the amorphous soft magnetic alloy with temperature, obtain the Bs(T)-T curve, and calculate the variation value of the Bs(T)-T curve with temperature to obtain the dBs(T) / dT-T curve;

[0081] The second calculation unit 202 is used to obtain the Bs value of the amorphous soft magnetic alloy at the preset temperature T1 based on the Bs(T)-T curve, and use the temperature value Tai when Bs(T) / Bs(T1)=45% as the lower limit temperature of the saturation annealing process of the amorphous soft magnetic alloy;

[0082] The third calculation unit 203 is used to obtain and analyze the DSC curve of the amorphous soft magnetic alloy to obtain the initial crystallization temperature Tx and Curie Tc of the amorphous soft magnetic alloy, and determine the upper limit temperature Tco of the annealing process of the amorphous soft magnetic alloy according to the initial crystallization temperature Tx and Curie Tc, and the dBs(T) / dT-T curve;

[0083] The analysis and processing unit 204 is used to optimize the lower limit temperature according to the initial crystallization temperature Tx and the Curie Tc, determine the optimized degradation temperature, and then determine the temperature range of the annealing process of the amorphous soft magnetic alloy according to the upper limit temperature Tco and the optimized degradation temperature, so as to perform structural relaxation annealing heat treatment on the amorphous soft magnetic alloy to obtain optimized soft magnetic properties.

[0084] Furthermore, an embodiment of the present invention also provides a heat treatment device for regulating soft magnetic properties, the device comprising a processor and a memory:

[0085] The memory is used to store program code and transmit the program code to the processor;

[0086] The processor is used to execute the steps of the heat treatment method for regulating soft magnetic properties as described in the above method embodiment according to the instructions in the program code.

[0087] Furthermore, a computer-readable storage medium is provided in an embodiment of the present invention, and the computer-readable storage medium is used to store program codes, and the program codes are used to execute the heat treatment method for regulating soft magnetic properties described in the above method embodiment.

[0088] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0089] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0090] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0091] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0092] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0093] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat treatment method for regulating soft magnetic properties, characterized in that: include: Obtaining the variation law of the saturation magnetic induction intensity Bs of the amorphous soft magnetic alloy with temperature, obtaining a Bs(T)-T curve, and calculating the variation value of the Bs(T)-T curve with temperature, obtaining a dBs(T) / dT-T curve; Based on the Bs(T)-T curve, the Bs value of the amorphous soft magnetic alloy at the preset temperature T1 is obtained, and the temperature value Tai when Bs(T) / Bs(T1)=45% is used as the lower limit temperature of the saturated annealing process of the amorphous soft magnetic alloy; Obtaining and analyzing the DSC curve of the amorphous soft magnetic alloy to obtain the initial crystallization temperature Tx and Curie Tc of the amorphous soft magnetic alloy, and determining the upper limit temperature Tco of the annealing process of the amorphous soft magnetic alloy according to the initial crystallization temperature Tx and the Curie Tc, and the dBs(T) / dT-T curve; The lower limit temperature is optimized according to the starting crystallization temperature Tx and the Curie Tc to determine the optimized degradation temperature, thereby determining the temperature range of the annealing process of the amorphous soft magnetic alloy according to the upper limit temperature Tco and the optimized degradation temperature, thereby performing structural relaxation annealing heat treatment on the amorphous soft magnetic alloy to obtain optimized soft magnetic properties.

2. The heat treatment method for regulating soft magnetic properties according to claim 1, characterized in that: The method of obtaining the variation law of the saturation magnetic induction intensity Bs of the amorphous soft magnetic alloy with temperature to obtain the Bs(T)-T curve includes: The amorphous soft magnetic alloy is subjected to a temperature increase treatment and a test using a superconducting quantum interference instrument to obtain a law of variation of the saturation magnetic induction intensity Bs of the amorphous soft magnetic alloy with temperature, thereby obtaining a Bs(T)-T curve.

3. The heat treatment method for regulating soft magnetic properties according to claim 1, characterized in that: The method of obtaining and analyzing the DSC curve of the amorphous soft magnetic alloy to obtain the initial crystallization temperature Tx and Curie Tc of the amorphous soft magnetic alloy includes: The amorphous soft magnetic alloy is tested by using a scanning differential calorimeter (DSC) to obtain a DSC curve of the amorphous soft magnetic alloy, thereby determining the initial crystallization temperature Tx and Curie Tc of the amorphous soft magnetic alloy based on the DSC curve.

4. The heat treatment method for regulating soft magnetic properties according to claim 1, characterized in that: The step of determining the upper limit temperature Tco of the annealing process of the amorphous soft magnetic alloy according to the initial crystallization temperature Tx, the Curie Tc, and the dBs(T) / dT-T curve comprises: When the initial crystallization temperature Tx differs from the Curie Tc by a preset temperature value or more, the temperature corresponding to the lowest value in the dBs(T) / dT-T curve is used as the upper limit temperature Tco of the annealing process of the amorphous soft magnetic alloy.

5. The heat treatment method for regulating soft magnetic properties according to claim 1, characterized in that: The step of optimizing the lower limit temperature according to the starting crystallization temperature Tx and the Curie Tc to determine the optimized degradation temperature, thereby determining the temperature range of the annealing process of the amorphous soft magnetic alloy according to the upper limit temperature Tco and the optimized degradation temperature, comprises: The lower limit temperature is optimized according to the starting crystallization temperature Tx and the Curie Tc, and the optimized degradation temperature is obtained as Ta≥Tc-(Tx-Tc) / 3K. Therefore, according to the upper limit temperature Tco and the optimized degradation temperature, the temperature range of the annealing process of the amorphous soft magnetic alloy is determined to be Tc-(Tx-Tc) / 3K≤Ta<Tco.

6. The heat treatment method for regulating soft magnetic properties according to claim 1, characterized in that: The step of performing structural relaxation annealing heat treatment on the amorphous soft magnetic alloy to obtain optimized soft magnetic properties comprises: Based on the temperature range of the annealing process of the amorphous soft magnetic alloy, the amorphous soft magnetic alloy is subjected to heating, heat preservation and quenching cooling treatment to obtain optimized soft magnetic properties.

7. The heat treatment method for regulating soft magnetic properties according to any one of claims 1 to 6, characterized in that: The amorphous soft magnetic alloy comprises: Fe 81.4 B 13.2 C 2.8 Si 1.8 P 0.8 Amorphous alloy and Fe 82.2 B 12.4 C 2.8 Si 1.8 P 0.8 Amorphous alloy.

8. A heat treatment system for regulating soft magnetic properties, characterized in that: include: The first calculation unit is used to obtain the variation law of the saturation magnetic induction intensity Bs of the amorphous soft magnetic alloy with temperature, obtain the Bs(T)-T curve, and calculate the variation value of the Bs(T)-T curve with temperature to obtain the dBs(T) / dT-T curve; A second calculation unit is used to obtain the Bs value of the amorphous soft magnetic alloy at a preset temperature T1 based on the Bs(T)-T curve, and use the temperature value Tai when Bs(T) / Bs(T1)=45% as the lower limit temperature of the saturation annealing process of the amorphous soft magnetic alloy; a third calculation unit, configured to obtain and analyze the DSC curve of the amorphous soft magnetic alloy, obtain the initial crystallization temperature Tx and Curie Tc of the amorphous soft magnetic alloy, and determine the upper limit temperature Tco of the annealing process of the amorphous soft magnetic alloy according to the initial crystallization temperature Tx and the Curie Tc, and the dBs(T) / dT-T curve; An analysis and processing unit is used to optimize the lower limit temperature according to the starting crystallization temperature Tx and the Curie Tc, determine the optimized degradation temperature, and thus determine the temperature range of the annealing process of the amorphous soft magnetic alloy according to the upper limit temperature Tco and the optimized degradation temperature, so as to perform structural relaxation annealing heat treatment on the amorphous soft magnetic alloy to obtain optimized soft magnetic properties.

9. A heat treatment device for regulating soft magnetic properties, characterized in that: The device comprises a processor and a memory: The memory is used to store program code and transmit the program code to the processor; The processor is used to execute the heat treatment method for regulating soft magnetic properties according to any one of claims 1 to 7 according to the instructions in the program code.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium is used to store program codes, and the program codes are used to execute the heat treatment method for regulating soft magnetic properties according to any one of claims 1 to 7.

Images