Fe-B-P-C-Cu-Co series amorphous-nanocrystalline transition state structure alloy with excellent magnetic-electric synergistic effect and preparation method of Fe-B-P-C-Cu-Co series amorphous-nanocrystalline transition state structure alloy

Abstract

The invention discloses a Fe-B-P-C-Cu-Co series amorphous-nanocrystalline transition state structure alloy with an excellent magnetic-electric synergistic effect and a preparation method of the Fe-B-P-C-Cu-Co series amorphous-nanocrystalline transition state structure alloy, and belongs to the field of metal material processing and manufacturing, the chemical components of the alloy comprise, by atomic percent, Fe B Pc < d > Cu < e > Co < f >, a is equal to 80-85, b is equal to 10-15, c is equal to 1-5, d is equal to 0.5-2, e is equal to 0.2-1, f is equal to 0-5, and the balance is inevitable impurities; the mother alloy is prepared by melting raw materials through vacuum induction, and an amorphous alloy thin strip is prepared by adopting a single-roller rapid quenching method; after the amorphous alloy is treated by a specific heat treatment process, the saturation magnetization of the amorphous alloy is 1.81 T, the coercive force is 3.8 A / m, and the resistivity is 117.2 [mu] omega.cm. The method has important theoretical and practical significance for developing amorphous-nanocrystalline transition-state structure alloy with an excellent magnetic-electric synergistic effect.

Description

Technical Field

[0001] This invention relates to the field of metal material processing and manufacturing, specifically to a Fe-BPC-Cu-Co amorphous-nanocrystalline transition state structure alloy with excellent magneto-electric synergistic effect and its preparation method. Background Technology

[0002] Amorphous alloys (also known as metallic glasses) are novel non-equilibrium metallic materials prepared through rapid solidification technology. Their long-range disordered atomic arrangement breaks free from lattice constraints, resulting in a series of unique properties surpassing those of traditional crystalline alloys: high strength and elasticity, high resistivity, excellent wave absorption capabilities, ultra-low elastic modulus matching human bone structure, superhydrophobicity and superoleophobicity, good wear and corrosion resistance, and superior soft magnetic properties. Leveraging these advantages, amorphous alloys demonstrate enormous application potential in numerous high-tech fields: in the new energy sector, they can be used for key components such as high-efficiency transformer cores, new energy vehicle drive motors, and photovoltaic inverter cores; in the micro-nano fabrication sector, they are suitable for manufacturing precision molds and micro-functional devices; in the aerospace sector, they can serve as lightweight, high-strength structural components or wear-resistant coating materials; and in the biomedical sector, they can be applied to orthopedic implants and surgical instruments. As an important candidate material for upgrading energy-efficient equipment, improving production processes, and promoting the development of new productive forces, amorphous alloys are continuously expanding their technological application boundaries.

[0003] In the field of soft magnetic materials, saturation magnetization (Ms) and coercivity (Hc) are two key soft magnetic performance indicators of Fe-based amorphous alloys. Saturation magnetization Ms is mainly determined by the average atomic magnetic moment mav in the alloy. When the directions of all atomic magnetic moments are parallel to and stable with the direction of the external magnetic field, the material reaches magnetization saturation. Amorphous alloys with high saturation magnetization and low coercivity enable magnetic components to achieve higher energy conversion efficiency in smaller size and weight, thus meeting the development requirements of miniaturization, lightweighting, and high performance in modern electronic devices. Currently, although common iron-based amorphous alloys show certain advantages in soft magnetic properties, their saturation magnetization needs further improvement.

[0004] On the other hand, the resistivity of Fe-based amorphous alloys is also one of their core physical properties, playing a crucial role in soft magnetic material applications. Compared to traditional crystalline Fe-Si soft magnetic alloys, the resistivity of currently commercially available Fe-based amorphous materials is typically 2-3 times higher, with typical values ​​ranging from 120-180 μΩ·cm. According to the eddy current loss formula, loss is inversely proportional to resistivity; therefore, the high resistivity characteristic gives amorphous alloys a significant advantage in high-frequency electromagnetic environments. The development of these Fe-based soft magnetic amorphous alloys with significantly high resistivity can effectively suppress high-frequency eddy current losses, greatly enhancing their application potential and competitiveness in high-frequency power electronic devices.

[0005] In recent years, global energy consumption has surged, and ecological and environmental problems have become increasingly severe, posing a serious threat to human survival and social development. As the world's largest electricity consumer, developing high-performance new materials and upgrading energy-efficient equipment in the industrial sector is an important way to achieve green and low-carbon development of my country's economy and society. Currently, with the innovative breakthroughs in modern power equipment and microelectronics technology, magnetic core materials are being developed towards high frequency and high power, energy saving and environmental protection, and lightweight miniaturization, which places higher demands on the performance of magnetic core materials. On the one hand, to achieve higher power density and lightweight miniaturization design, it is necessary to improve the saturation magnetization (Ms) of the material; on the other hand, to suppress the eddy current effect under high-frequency operating conditions and reduce magnetic core losses, high resistivity (ρ) has become a key performance indicator. Although traditional crystalline Fe-Si alloys have high Ms, their development is limited due to strong magnetocrystalline anisotropy and low ρ (<80 μΩ·cm), resulting in significant losses in high-frequency applications; while ferrite soft magnetic materials, despite their extremely high ρ values, have Ms (<0.5 T) that is difficult to meet the needs of practical applications. Therefore, developing novel soft magnetic materials with both high Ms and high ρ is particularly important. Fe-based amorphous alloys, with their unique structure of long-range disorder and short-range order in atomic arrangement, effectively eliminate magnetocrystalline anisotropy and significantly enhance electron scattering effects, exhibiting high Ms and ρ, making them a highly promising mid-to-high frequency magnetic material. Furthermore, appropriate heat treatment can induce the formation of highly refined amorphous / nanocrystalline composite structures in the alloys, further optimizing their soft magnetic properties. However, several key scientific problems still exist for these materials, and the urgent need to develop novel Fe-based amorphous / nanocrystalline alloy systems with excellent comprehensive performance has become a core research topic at the forefront of this field.

[0006] This invention introduces Cu and Co elements into the Fe-BPC alloy and optimizes their ratio, successfully developing a novel Fe alloy that combines excellent soft magnetic properties, a wide heat treatment window, good bending toughness, and relatively low material cost. a B b P c C d Cu e Cof Alloy. By establishing a quantitative correlation between alloy annealing process parameters, structural parameters, and magnetoelectric properties, a soft magnetic material with both high Ms and high ρ was designed and developed. This patented alloy has extremely high application potential and competitiveness in high-frequency power electronic devices. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a Fe-BPC-Cu-Co amorphous-nanocrystalline transition state structure alloy with excellent magneto-electric synergistic effect and its preparation method. This invention belongs to the field of metal material processing and manufacturing. The chemical composition of the alloy, by atomic percentage, is Fe... a B b P c C d Cu e Co f Where a=80-85, b=10-15, c=1-5, d=0.5-2, e=0.2-1, f=0-5, and the balance is unavoidable impurities; the master alloy is prepared by vacuum induction melting of raw materials, and amorphous alloy strips are prepared by single-roll rapid quenching; after a specific heat treatment process, the saturation magnetization of the amorphous alloy is 1.81T, the coercivity is 3.8A / m, and the resistivity is 117.2 μΩ·cm. This invention has important theoretical and practical significance for developing amorphous-nanocrystalline transition state structure alloys with excellent magneto-electric synergistic effects.

[0008] This invention, through the rational design of alloy composition and optimization of annealing preparation process, produces a material that maintains high saturation magnetization while possessing excellent soft magnetic properties, a wide heat treatment window, good bending toughness, and relatively low material cost, thus meeting the needs of industrial production and practical applications.

[0009] To achieve the above technical effects, the following technical solution is adopted: A Fe-BPC-Cu-Co amorphous-nanocrystalline transition state structure alloy with excellent magneto-electric synergistic effect. The alloy's chemical composition, by atomic percentage, is Fe. a B b P c C d Cu e Co f Where a=80-85, b=10-15, c=1-5, d=0.5-2, e=0.2-1, f=0-5, and the balance is unavoidable impurities.

[0010] Furthermore, the amorphous-nanocrystalline transition state structure alloy has a saturation magnetization of 1.81T, a coercivity of 3.8A / m, and a resistivity of 117.2 μΩ·cm.

[0011] A method for preparing a Fe-BPC-Cu-Co amorphous-nanocrystalline transition state structure alloy with excellent magneto-electric synergistic effect, specifically including the following steps: Step S1: Ingredients According to the above alloy composition, accurately weigh the Fe, B, P, C, Cu and Co raw materials, and ensure that the purity of the raw materials is not less than 99.9% to ensure that the purity and quality of the raw materials meet the requirements. Step S2: Smelting The weighed raw materials are placed in a vacuum induction melting furnace and melted under vacuum conditions. The temperature is first slowly increased to fully melt and mix the raw materials evenly, resulting in a melted alloy liquid. Step S3: Casting The molten alloy liquid is poured into a copper mold under argon protection to obtain a master alloy ingot. Step S4: Belt making Amorphous alloy strips were prepared using a single-roller rapid quenching method: the master alloy ingot was placed in a quartz tube and heated to melt under argon protection. Then, the alloy liquid was sprayed onto the surface of a high-speed rotating copper roller by argon pressure. After cooling, an amorphous-nanocrystalline transition state structure alloy strip was obtained.

[0012] Step S5: Heat treatment The obtained amorphous-nanocrystalline transition state structure alloy strip was sealed in a vacuum quartz tube and placed in a muffle furnace for isothermal heat treatment for 10 minutes. Subsequently, the muffle furnace was set to the target annealing temperature, and the heat treatment temperature was 20-200℃ lower than the crystallization temperature for 10-15 minutes. Finally, the quartz tube was removed and immediately subjected to water quenching.

[0013] Furthermore, in step S2, the weighed raw materials are placed in a vacuum induction melting furnace, and the furnace is heated to a vacuum degree of not less than 10. -3 Melting is carried out under the conditions of Pa; first, the temperature is slowly raised to 1200-1400℃ to fully melt and mix the raw materials evenly, and then the melting is carried out at this temperature for 15-20 minutes.

[0014] Furthermore, in step S4, the master alloy ingot is melted by induction heating to 1100-1200℃, and then the molten alloy is sprayed onto the surface of a high-speed rotating copper roller by argon pressure of 0.03-0.05MPa. The linear speed of the copper roller is 30-50m / s, thereby obtaining an amorphous-nanocrystalline transition state structure alloy strip with a thickness of 20-30μm.

[0015] Furthermore, in step S4, the cooling rate is 10. 3 ~10 6 K / s.

[0016] Furthermore, in step S4, the conditions for heating to melt the master alloy ingot are: induced current 6-15A, heating for 3-6 seconds.

[0017] Furthermore, in step S5, the heat treatment temperature is determined to be 653K using a DSC curve.

[0018] The above-mentioned amorphous-nanocrystalline transition state structure alloys are used in high-frequency, high-power power equipment such as distribution transformers, inductors, and motor cores.

[0019] The beneficial effects of this invention are as follows: 1. High saturation magnetization: By rationally controlling the content of Fe, Cu and Co, the alloy has extremely high saturation magnetization, which can reach more than 1.8T, and the coercivity is as low as 3.8 A / m, meeting the requirements of high-performance magnetic components.

[0020] 2. High resistivity: By rationally controlling the heat treatment process, the alloy forms a transitional structure between amorphous and traditional nanocrystalline structures. This transitional structure enables the alloy to exhibit a unique magneto-electric synergistic effect, increasing the alloy resistivity to 117.2 μΩ·cm, which greatly broadens the application range of the alloy.

[0021] 3. Excellent amorphous forming ability: The addition of P and B elements optimizes the atomic arrangement of the alloy and improves its amorphous forming ability, enabling the stable acquisition of amorphous structures during the preparation process.

[0022] 4. Excellent overall performance: This alloy not only has high saturation magnetization and good amorphous forming ability, but also has good soft magnetic properties, strength and corrosion resistance. It has excellent overall performance and is suitable for a variety of application scenarios.

[0023] 5. Simple preparation process: The preparation method of the present invention adopts common vacuum induction melting and single-roll rapid quenching technology. The process is simple, easy to operate, conducive to large-scale industrial production, and at the same time reduces production costs. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 For the present invention Fe 84.5-x B 12 P2C1Cu 0.5 Co xXRD patterns of quenched alloy strips (x=0, 2, 4, 6, 8, 10), where, Figure 1 a is the XRD pattern of the roller surface. Figure 1 b is the free surface XRD pattern; Figure 2 For the present invention Fe 84.5-x B 12 P2C1Cu 0.5 Co x (x=0, 2, 4, 6, 8, 10) DSC thermal analysis curves of quenched alloy strips; Figure 3 For the present invention Fe 84.5-x B 12 P2C1Cu 0.5 Co x The graph shows the relationship between the annealing temperature of alloys (x=0, 2, 4, 6, 8, 10); where, Figure 3 a is M s Graph showing the relationship between annealing temperature and temperature. Figure 3 b is H c Graph showing the relationship between annealing temperature and annealing temperature; Figure 4 The Fe in the quenched state and after annealing at 633-833 K are examples of the Fe of this invention. 82.5 B 12 P2C1Cu 0.5 XRD pattern of Co2 alloy; Figure 5 The Fe in the quenched state and after annealing at 633-833 K are examples of the Fe of this invention. 82.5 B 12 P2C1Cu 0.5 DSC curve of Co2 alloy Figure 6 For the present invention Fe 82.5 B 12 P2C1Cu 0.5 TEM bright-field images of Co2 alloy in different states; among them. Figure 6 a1- Figure 6 a3 is in the quenched state; Figure 6 b1- Figure 6 b2 is 633 K. Figure 6 c1- Figure 6 c2 is 653 K. Figure 6 d1- Figure 6 d2 is 693 K. Figure 6 e1- Figure 6 e2 is 733 K and Figure 6 f1- Figure 6f2 is annealed at 773 K for 10 min; Figure 6 a1、 Figure 6 b1、 Figure 6 c1、 Figure 6 d1、 Figure 6 e1 and Figure 6 The illustration in f1 is the corresponding SAED image; Figure 6 b3、 Figure 6 c3 Figure 6 d3、 Figure 6 e3 and Figure 6 f3 is a statistical chart of the grain size of the corresponding annealed sample. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0027] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, and / or combinations thereof.

[0029] Example 1: 1. Ingredients: Weigh out Fe by atomic percentage. a B b P c C d Cu e Co f The raw materials have the following properties: a=82.5, b=12, c=2, d=1, e=0.5, f=2, and the purity of all raw materials is 99.9%.

[0030] 2. Melting: Place the raw materials into a vacuum induction melting furnace, and evacuate the vacuum to 10. -3 Pa, slowly heat to 1350℃, and melt for 18 minutes.

[0031] 3. Casting: Under argon protection, the molten alloy is cast into a copper mold to obtain the master alloy ingot.

[0032] 4. Strip making: The single-roll rapid quenching method is adopted. The master alloy ingot is heated to 1150℃ under argon protection and melted. The alloy liquid is sprayed onto the surface of a high-speed rotating copper roller with a linear speed of 40m / s using argon pressure of 0.04MPa to obtain an amorphous alloy thin strip with a thickness of 25μm.

[0033] 5. Heat treatment: Seal the alloy strip in a vacuum quartz tube, then set the TSK-1400 muffle furnace to 653K. After heating to this temperature, place the quartz tube in the muffle furnace for isothermal heat treatment for 10 minutes. Finally, remove the quartz tube and immediately perform water quenching.

[0034] X-ray diffraction analysis revealed no obvious crystal diffraction peaks, indicating a typical amorphous structure with good amorphous forming ability. Performance tests were conducted on the prepared amorphous alloy ribbon and its properties after heat treatment. The results showed that annealing at 653 K for 10 min yielded Fe alloy ribbons exhibiting both high soft magnetic properties (Ms=1.81 T, Hc=3.8 A / m) and high resistivity (ρ=117.2 μΩ·cm). 82.5 B 12 P2C1Cu 0.5 Co2 nanocrystalline alloy. Its excellent soft magnetic properties are mainly attributed to its unique structure (Nd = 2.06 × 10⁻⁶). 23 / m 3 The extremely low magnetic anisotropy and strong magnetic exchange brought about by the D=9.2 nm alloy, while the high resistivity is related to the low crystallinity (φc=14.8%, Vc=15.7%) of the alloy, which is close to the percolation threshold.

[0035] Example 2: 1. Ingredients: Weigh out Fe by atomic percentage. a B b P c C d Cu e Co f The raw materials have the following properties: a=84.5, b=12, c=2, d=1, e=0.5, f=0, and the purity of all raw materials is 99.9%.

[0036] 2. Melting: Place the raw materials into a vacuum induction melting furnace, and evacuate the vacuum to 10. -3 Pa, slowly heat to 1350℃, and melt for 18 minutes.

[0037] 3. Casting: Under argon protection, the molten alloy is cast into a copper mold to obtain the master alloy ingot.

[0038] 4. Strip making: The single-roll rapid quenching method is adopted. The master alloy ingot is heated to 1150℃ under argon protection and melted. The alloy liquid is sprayed onto the surface of a high-speed rotating copper roller with a linear speed of 40m / s using argon pressure of 0.04MPa to obtain an amorphous alloy thin strip with a thickness of 25μm.

[0039] 5. Heat treatment: Seal the alloy strip in a vacuum quartz tube, then set the TSK-1400 muffle furnace to 653K, heat it to this temperature, and place the quartz tube in the muffle furnace for 10 minutes of isothermal heat treatment. Finally, remove the quartz tube and immediately perform water quenching.

[0040] Example 3: 1. Ingredients: Weigh out Fe by atomic percentage. a B b P c C d Cu e Co f The raw materials have the following properties: a=80.5, b=12, c=2, d=1, e=0.5, f=4, and the purity of all raw materials is 99.9%.

[0041] 2. Melting: Place the raw materials into a vacuum induction melting furnace, and evacuate the vacuum to 10. -3 Pa, slowly heat to 1350℃, and melt for 18 minutes.

[0042] 3. Casting: Under argon protection, the molten alloy is cast into a copper mold to obtain the master alloy ingot.

[0043] 4. Strip making: The single-roll rapid quenching method is adopted. The master alloy ingot is heated to 1150℃ under argon protection and melted. The alloy liquid is sprayed onto the surface of a high-speed rotating copper roller with a linear speed of 40m / s using argon pressure of 0.04MPa to obtain an amorphous alloy thin strip with a thickness of 25μm.

[0044] 5. Heat treatment: Seal the alloy strip in a vacuum quartz tube, then set the TSK-1400 muffle furnace to 653K, heat it to this temperature, and place the quartz tube in the muffle furnace for 10 minutes of isothermal heat treatment. Finally, remove the quartz tube and immediately perform water quenching.

[0045] Comparative Example 1: 1. Ingredients: Weigh out Fe by atomic percentage. a B b P c C d Cu e Co f The raw materials have the following properties: a=78.5, b=12, c=2, d=1, e=0.5, f=6, and the purity of all raw materials is 99.9%.

[0046] 2. Melting: Place the raw materials into a vacuum induction melting furnace, and evacuate the vacuum to 10. -3 Pa, slowly heat to 1350℃, and melt for 18 minutes.

[0047] 3. Casting: Under argon protection, the molten alloy is cast into a copper mold to obtain the master alloy ingot.

[0048] 4. Strip making: The single-roll rapid quenching method is adopted. The master alloy ingot is heated to 1150℃ under argon protection and melted. The alloy liquid is sprayed onto the surface of a high-speed rotating copper roller with a linear speed of 40m / s using argon pressure of 0.04MPa to obtain an amorphous alloy thin strip with a thickness of 25μm.

[0049] 5. Heat treatment: Seal the alloy strip in a vacuum quartz tube, then set the TSK-1400 muffle furnace to 653K, heat it to this temperature, and place the quartz tube in the muffle furnace for 10 minutes of isothermal heat treatment. Finally, remove the quartz tube and immediately perform water quenching.

[0050] Comparative Example 2: 1. Ingredients: Weigh out Fe by atomic percentage. a B b P c C d Cu e Co f The raw materials have the following properties: a=76.5, b=12, c=2, d=1, e=0.5, f=8, and the purity of all raw materials is 99.9%.

[0051] 2. Melting: Place the raw materials into a vacuum induction melting furnace, and evacuate the vacuum to 10. -3 Pa, slowly heat to 1350℃, and melt for 18 minutes.

[0052] 3. Casting: Under argon protection, the molten alloy is cast into a copper mold to obtain the master alloy ingot.

[0053] 4. Strip making: The single-roll rapid quenching method is adopted. The master alloy ingot is heated to 1150℃ under argon protection and melted. The alloy liquid is sprayed onto the surface of a high-speed rotating copper roller with a linear speed of 40m / s using argon pressure of 0.04MPa to obtain an amorphous alloy thin strip with a thickness of 25μm.

[0054] 5. Heat treatment: Seal the alloy strip in a vacuum quartz tube, then set the TSK-1400 muffle furnace to 653K, heat it to this temperature, and place the quartz tube in the muffle furnace for 10 minutes of isothermal heat treatment. Finally, remove the quartz tube and immediately perform water quenching.

[0055] Comparative Example 3: 1. Ingredients: Weigh out Fe by atomic percentage.a B b P c C d Cu e Co f The raw materials have the following properties: a=74.5, b=12, c=2, d=1, e=0.5, f=10, and the purity of all raw materials is 99.9%.

[0056] 2. Melting: Place the raw materials into a vacuum induction melting furnace, and evacuate the vacuum to 10. -3 Pa, slowly heat to 1350℃, and melt for 18 minutes.

[0057] 3. Casting: Under argon protection, the molten alloy is cast into a copper mold to obtain the master alloy ingot.

[0058] 4. Strip making: The single-roll rapid quenching method is adopted. The master alloy ingot is heated to 1150℃ under argon protection and melted. The alloy liquid is sprayed onto the surface of a high-speed rotating copper roller with a linear speed of 40m / s using argon pressure of 0.04MPa to obtain an amorphous alloy thin strip with a thickness of 25μm.

[0059] 5. Heat treatment: Seal the alloy strip in a vacuum quartz tube, then set the TSK-1400 muffle furnace to 653K, heat it to this temperature, and place the quartz tube in the muffle furnace for 10 minutes of isothermal heat treatment. Finally, remove the quartz tube and immediately perform water quenching.

[0060] Comparative Example 4: 1. Ingredients: Weigh out Fe by atomic percentage. a B b P c C d Cu e Co f The raw materials have the following properties: a=82.5, b=12, c=2, d=1, e=0.5, f=2, and the purity of all raw materials is 99.9%.

[0061] 2. Melting: Place the raw materials into a vacuum induction melting furnace, and evacuate the vacuum to 10. -3 Pa, slowly heat to 1350℃, and melt for 18 minutes.

[0062] 3. Casting: Under argon protection, the molten alloy is cast into a copper mold to obtain the master alloy ingot.

[0063] 4. Strip making: The single-roll rapid quenching method is adopted. The master alloy ingot is heated to 1150℃ under argon protection and melted. The alloy liquid is sprayed onto the surface of a high-speed rotating copper roller with a linear speed of 40m / s using argon pressure of 0.04MPa to obtain an amorphous alloy thin strip with a thickness of 25μm.

[0064] 5. Heat treatment: As-cast, without heat treatment.

[0065] Comparative Example 5: 1. Ingredients: Weigh out Fe by atomic percentage. a B b P c C d Cu e Co f The raw materials have the following properties: a=82.5, b=12, c=2, d=1, e=0.5, f=2, and the purity of all raw materials is 99.9%.

[0066] 2. Melting: Place the raw materials into a vacuum induction melting furnace, and evacuate the vacuum to 10. -3 Pa, slowly heat to 1350℃, and melt for 18 minutes.

[0067] 3. Casting: Under argon protection, the molten alloy is cast into a copper mold to obtain the master alloy ingot.

[0068] 4. Strip making: The single-roll rapid quenching method is adopted. The master alloy ingot is heated to 1150℃ under argon protection and melted. The alloy liquid is sprayed onto the surface of a high-speed rotating copper roller with a linear speed of 40m / s using argon pressure of 0.04MPa to obtain an amorphous alloy thin strip with a thickness of 25μm.

[0069] 5. Heat treatment: Seal the alloy strip in a vacuum quartz tube, then set the TSK-1400 muffle furnace to 633K. After heating to this temperature, place the quartz tube in the muffle furnace for isothermal heat treatment for 10 minutes. Finally, remove the quartz tube and immediately perform water quenching.

[0070] Comparative Example 6: 1. Ingredients: Weigh out Fe by atomic percentage. a B b P c C d Cu e Co f The raw materials have the following properties: a=82.5, b=12, c=2, d=1, e=0.5, f=2, and the purity of all raw materials is 99.9%.

[0071] 2. Melting: Place the raw materials into a vacuum induction melting furnace, and evacuate the vacuum to 10. -3 Pa, slowly heat to 1350℃, and melt for 18 minutes.

[0072] 3. Casting: Under argon protection, the molten alloy is cast into a copper mold to obtain the master alloy ingot.

[0073] 4. Strip making: The single-roll rapid quenching method is adopted. The master alloy ingot is heated to 1150℃ under argon protection and melted. The alloy liquid is sprayed onto the surface of a high-speed rotating copper roller with a linear speed of 40m / s using argon pressure of 0.04MPa to obtain an amorphous alloy thin strip with a thickness of 25μm.

[0074] 5. Heat treatment: Seal the alloy strip in a vacuum quartz tube, then set the TSK-1400 muffle furnace to 673K. After heating to this temperature, place the quartz tube in the muffle furnace for isothermal heat treatment for 10 minutes. Finally, remove the quartz tube and immediately perform water quenching.

[0075] Comparative Example 7: 1. Ingredients: Weigh out Fe by atomic percentage. a B b P c C d Cu e Co f The raw materials have the following properties: a=82.5, b=12, c=2, d=1, e=0.5, f=2, and the purity of all raw materials is 99.9%.

[0076] 2. Melting: Place the raw materials into a vacuum induction melting furnace, and evacuate the vacuum to 10. -3 Pa, slowly heat to 1350℃, and melt for 18 minutes.

[0077] 3. Casting: Under argon protection, the molten alloy is cast into a copper mold to obtain the master alloy ingot.

[0078] 4. Strip making: The single-roll rapid quenching method is adopted. The master alloy ingot is heated to 1150℃ under argon protection and melted. The alloy liquid is sprayed onto the surface of a high-speed rotating copper roller with a linear speed of 40m / s using argon pressure of 0.04MPa to obtain an amorphous alloy thin strip with a thickness of 25μm.

[0079] 5. Heat treatment: Seal the alloy strip in a vacuum quartz tube, then set the TSK-1400 muffle furnace to 693K. After heating to this temperature, place the quartz tube in the muffle furnace for 10 minutes of isothermal heat treatment. Finally, remove the quartz tube and immediately perform water quenching.

[0080] Comparative Example 8: 1. Ingredients: Weigh out Fe by atomic percentage. a B b P c C d Cu e Co f The raw materials have the following properties: a=82.5, b=12, c=2, d=1, e=0.5, f=2, and the purity of all raw materials is 99.9%.

[0081] 2. Melting: Place the raw materials into a vacuum induction melting furnace, and evacuate the vacuum to 10. -3 Pa, slowly heat to 1350℃, and melt for 18 minutes.

[0082] 3. Casting: Under argon protection, the molten alloy is cast into a copper mold to obtain the master alloy ingot.

[0083] 4. Strip making: The single-roll rapid quenching method is adopted. The master alloy ingot is heated to 1150℃ under argon protection and melted. The alloy liquid is sprayed onto the surface of a high-speed rotating copper roller with a linear speed of 40m / s using argon pressure of 0.04MPa to obtain an amorphous alloy thin strip with a thickness of 25μm.

[0084] 5. Heat treatment: Seal the alloy strip in a vacuum quartz tube, then set the TSK-1400 muffle furnace to 713K. After heating to this temperature, place the quartz tube in the muffle furnace for 10 minutes of isothermal heat treatment. Finally, remove the quartz tube and immediately perform water quenching.

[0085] Comparative Example 9: 1. Ingredients: Weigh out Fe by atomic percentage. a B b P c C d Cu e Co f The raw materials have the following properties: a=82.5, b=12, c=2, d=1, e=0.5, f=2, and the purity of all raw materials is 99.9%.

[0086] 2. Melting: Place the raw materials into a vacuum induction melting furnace, and evacuate the vacuum to 10. -3 Pa, slowly heat to 1350℃, and melt for 18 minutes.

[0087] 3. Casting: Under argon protection, the molten alloy is cast into a copper mold to obtain the master alloy ingot.

[0088] 4. Strip making: The single-roll rapid quenching method is adopted. The master alloy ingot is heated to 1150℃ under argon protection and melted. The alloy liquid is sprayed onto the surface of a high-speed rotating copper roller with a linear speed of 40m / s using argon pressure of 0.04MPa to obtain an amorphous alloy thin strip with a thickness of 25μm.

[0089] 5. Heat treatment: Seal the alloy strip in a vacuum quartz tube, then set the TSK-1400 muffle furnace to 733K. After heating to this temperature, place the quartz tube in the muffle furnace for 10 minutes of isothermal heat treatment. Finally, remove the quartz tube and immediately perform water quenching.

[0090] Comparative Example 10: 1. Ingredients: Weigh out Fe by atomic percentage.a B b P c C d Cu e Co f The raw materials have the following properties: a=82.5, b=12, c=2, d=1, e=0.5, f=2, and the purity of all raw materials is 99.9%.

[0091] 2. Melting: Place the raw materials into a vacuum induction melting furnace, and evacuate the vacuum to 10. -3 Pa, slowly heat to 1350℃, and melt for 18 minutes.

[0092] 3. Casting: Under argon protection, the molten alloy is cast into a copper mold to obtain the master alloy ingot.

[0093] 4. Strip making: The single-roll rapid quenching method is adopted. The master alloy ingot is heated to 1150℃ under argon protection and melted. The alloy liquid is sprayed onto the surface of a high-speed rotating copper roller with a linear speed of 40m / s using argon pressure of 0.04MPa to obtain an amorphous alloy thin strip with a thickness of 25μm.

[0094] 5. Heat treatment: Seal the alloy strip in a vacuum quartz tube, then set the TSK-1400 muffle furnace to 753K. After heating to this temperature, place the quartz tube in the muffle furnace for isothermal heat treatment for 10 minutes. Finally, remove the quartz tube and immediately perform water quenching.

[0095] Comparative Example 11: 1. Ingredients: Weigh out Fe by atomic percentage. a B b P c C d Cu e Co f The raw materials have the following properties: a=82.5, b=12, c=2, d=1, e=0.5, f=2, and the purity of all raw materials is 99.9%.

[0096] 2. Melting: Place the raw materials into a vacuum induction melting furnace, and evacuate the vacuum to 10. -3 Pa, slowly heat to 1350℃, and melt for 18 minutes.

[0097] 3. Casting: Under argon protection, the molten alloy is cast into a copper mold to obtain the master alloy ingot.

[0098] 4. Strip making: The single-roll rapid quenching method is adopted. The master alloy ingot is heated to 1150℃ under argon protection and melted. The alloy liquid is sprayed onto the surface of a high-speed rotating copper roller with a linear speed of 40m / s using argon pressure of 0.04MPa to obtain an amorphous alloy thin strip with a thickness of 25μm.

[0099] 5. Heat treatment: Seal the alloy strip in a vacuum quartz tube, then set the TSK-1400 muffle furnace to 773K. After heating to this temperature, place the quartz tube in the muffle furnace for isothermal heat treatment for 10 minutes. Finally, remove the quartz tube and immediately perform water quenching.

[0100] Comparative Example 12: 1. Ingredients: Weigh out Fe by atomic percentage. a B b P c C d Cu e Co f The raw materials have the following properties: a=82.5, b=12, c=2, d=1, e=0.5, f=2, and the purity of all raw materials is 99.9%.

[0101] 2. Melting: Place the raw materials into a vacuum induction melting furnace, and evacuate the vacuum to 10. -3 Pa, slowly heat to 1350℃, and melt for 18 minutes.

[0102] 3. Casting: Under argon protection, the molten alloy is cast into a copper mold to obtain the master alloy ingot.

[0103] 4. Strip making: The single-roll rapid quenching method is adopted. The master alloy ingot is heated to 1150℃ under argon protection and melted. The alloy liquid is sprayed onto the surface of a high-speed rotating copper roller with a linear speed of 40m / s using argon pressure of 0.04MPa to obtain an amorphous alloy thin strip with a thickness of 25μm.

[0104] 5. Heat treatment: Seal the alloy strip in a vacuum quartz tube, then set the TSK-1400 muffle furnace to 833K, heat it to this temperature, place the quartz tube in the muffle furnace for 10 minutes of isothermal heat treatment, and finally remove the quartz tube and immediately perform water quenching treatment.

[0105] Examples and comparative examples of quenched and annealed Fe 82.5 B 12 P2C1Cu 0.5 The number density of nanocrystals in Co2 alloys ( N d ), crystallization volume fraction ( V c ), average grain size ( D ) and saturation magnetization ( M s ), coercivity ( H c ) and resistivity ( ρ The values ​​are shown in Table 1: Table 1. Quenched and Annealed Fe 82.5 B 12P2C1Cu 0.5 The number density of nanocrystals in Co2 alloys ( N d ), crystallization volume fraction ( V c ), average grain size ( D ) and saturation magnetization ( M s ), coercivity ( H c ) and resistivity ( ρ )

[0106] like Figures 1-6 As shown in the above examples and comparative examples, the Fe-BPC-Cu-Co amorphous alloy with high saturation magnetization prepared by the present invention has high saturation magnetization, low coercivity, high resistivity, good amorphous forming ability and comprehensive performance. The preparation process is simple and suitable for industrial production.

[0107] In summary, this invention discloses an Fe-BPC-Cu-Co amorphous-nanocrystalline transition state structure alloy with excellent magneto-electric synergistic effect and its preparation method, belonging to the field of metal material processing and manufacturing. The chemical composition of the alloy, by atomic percentage, is Fe. a B b P c C d Cu e Co f Where a=80-85, b=10-15, c=1-5, d=0.5-2, e=0.2-1, f=0-5, and the balance is unavoidable impurities; the master alloy is prepared by vacuum induction melting of raw materials, and amorphous alloy strips are prepared by single-roll rapid quenching; after a specific heat treatment process, the saturation magnetization of the amorphous alloy is 1.81T, the coercivity is 3.8A / m, and the resistivity is 117.2 μΩ·cm. This invention has important theoretical and practical significance for developing amorphous-nanocrystalline transition state structure alloys with excellent magneto-electric synergistic effects.

[0108] This invention, through the rational design of alloy composition and optimization of preparation process, produces a material that maintains high saturation magnetization while possessing excellent soft magnetic properties, a wide heat treatment window, good bending toughness, and relatively low material cost, thus meeting the needs of industrial production and practical applications.

[0109] Therefore, those skilled in the art will recognize that although embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A Fe-BPC-Cu-Co amorphous-nanocrystalline transition state structure alloy with excellent magneto-electric synergistic effect, characterized in that, The chemical composition of the alloy, by atomic percentage, is Fe. a B b P c C d Cu e Co f Where a=80-85, b=10-15, c=1-5, d=0.5-2, e=0.2-1, f=0-5, and the balance is unavoidable impurities.

2. The Fe-BPC-Cu-Co amorphous-nanocrystalline transition state structure alloy with excellent magneto-electric synergistic effect as described in claim 1, characterized in that, The amorphous-nanocrystalline transition state structure alloy has a saturation magnetization of 1.81T, a coercivity of 3.8A / m, and a resistivity of 117.2 μΩ·cm.

3. The method for preparing a Fe-BPC-Cu-Co amorphous-nanocrystalline transition state structure alloy with excellent magneto-electric synergistic effect as described in claim 1, characterized in that, The preparation method specifically includes the following steps: Step S1: Ingredients According to the above alloy composition, accurately weigh the Fe, B, P, C, Cu and Co raw materials, and ensure that the purity of the raw materials is not less than 99.9% to ensure that the purity and quality of the raw materials meet the requirements. Step S2: Smelting The weighed raw materials are placed in a vacuum induction melting furnace and melted under vacuum conditions. The temperature is first slowly increased to fully melt and mix the raw materials evenly, resulting in a melted alloy liquid. Step S3: Casting The molten alloy liquid is poured into a copper mold under argon protection to obtain a master alloy ingot. Step S4: Belt making Amorphous alloy strips were prepared by a single-roller rapid quenching method: the master alloy ingot was placed in a quartz tube and heated to melt under argon protection. Then, the alloy liquid was sprayed onto the surface of a high-speed rotating copper roller by argon pressure. After cooling, an amorphous-nanocrystalline transition state structure alloy strip was obtained.

4. Step S5: Heat treatment The obtained amorphous-nanocrystalline transition state structure alloy strip was sealed in a vacuum quartz tube and placed in a muffle furnace for isothermal heat treatment for 10 minutes. Subsequently, the muffle furnace was set to the target annealing temperature, and the heat treatment temperature was 20-200℃ lower than the crystallization temperature for 10-15 minutes. Finally, the quartz tube was removed and immediately subjected to water quenching.

5. The method for preparing a Fe-BPC-Cu-Co amorphous-nanocrystalline transition state structure alloy with excellent magneto-electric synergistic effect as described in claim 3, characterized in that, In step S2, the weighed raw materials are placed in a vacuum induction melting furnace, and the vacuum degree is not less than 10. -3 Melting is carried out under the conditions of Pa; first, the temperature is slowly raised to 1200-1400℃ to fully melt and mix the raw materials evenly, and then the melting is carried out at this temperature for 15-20 minutes.

6. The method for preparing a Fe-BPC-Cu-Co amorphous-nanocrystalline transition state structure alloy with excellent magneto-electric synergistic effect as described in claim 3, characterized in that, In step S4, the master alloy ingot is melted by induction heating to 1100-1200℃, and then the alloy liquid is sprayed onto the surface of a high-speed rotating copper roller by argon pressure of 0.03-0.05MPa. The linear speed of the copper roller is 30-50m / s, thereby obtaining an amorphous-nanocrystalline transition state structure alloy strip with a thickness of 20-30μm.

7. The method for preparing a Fe-BPC-Cu-Co amorphous-nanocrystalline transition state structure alloy with excellent magneto-electric synergistic effect as described in claim 3, characterized in that, In step S4, the cooling rate is 10. 3 ~10 6 K / s.

8. The method for preparing a Fe-BPC-Cu-Co amorphous-nanocrystalline transition state structure alloy with excellent magneto-electric synergistic effect as described in claim 3, characterized in that, In step S4, the conditions for heating to melt the master alloy ingot are: induced current 6-15A, heating for 3-6 seconds.

9. The method for preparing a Fe-BPC-Cu-Co amorphous-nanocrystalline transition state structure alloy with excellent magneto-electric synergistic effect as described in claim 3, characterized in that, In step S5, the heat treatment temperature is determined to be 653K using a DSC curve.

10. The application of the alloy according to any one of claims 1-2 or the alloy prepared by the method according to any one of claims 3-8 in high-frequency, high-power power equipment such as distribution transformers, inductors and motor cores.

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