A full transition group co-v-ti-mn soft magnetic alloy and a preparation method thereof

Abstract

The application provides a full transition group Co-V-Ti-Mn soft magnetic alloy and a preparation method thereof. a V b Ti c Mn d (at. %), wherein 45<=a<=58, 10<=b<=23, 10<=c<=15, 10<=d<=20, and a+b+c+d=100, the application uses multiple component transition group metal elements to strengthen the interatomic ferromagnetic interaction, and in the preparation process, a heat treatment process is used to control the phase composition and eliminate the dendritic segregation of the initial ingot, and a new type of Co-V-Ti-Mn soft magnetic alloy and a preparation method thereof are provided, the full transition group Co-V-Ti-Mn material has high saturation magnetization and low coercivity, and the preparation method is simple and easy to implement, and is suitable for batch industrial production.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new materials, and particularly relates to a full transition group Co-V-Ti-Mn soft magnetic alloy and a preparation method thereof. BACKGROUND

[0002] Metallic soft magnetic materials are key basic materials for electronic industry and information technology industry, have high saturation magnetization, low coercivity, low magnetic loss and high stability, and can be widely used in the production of various inductors, filters, transformers, inductor coils, generator magnetic cores and the like. The high-speed development of modern information technology continuously puts forward higher requirements for the magnetic properties of soft magnetic materials. In order to obtain high-performance soft magnetic properties, magnetic elements and transition group non-magnetic metal elements can be added to make the alloy have high saturation magnetization and low coercivity. However, the soft magnetic materials currently applied in traditional industries still cannot simultaneously meet the performance requirements of high saturation magnetization and ultra-low coercivity.

[0003] Although amorphous soft magnetic alloys have ultra-low coercivity and relatively high permeability, the amorphous forming ability of the alloy depends on complex chemical components, and the required preparation process conditions are harsh. Although ferrite soft magnetic materials have low coercivity, high resistivity and other advantages, the saturation magnetization of the material is low, so they are mostly applied in high-frequency low-power scenarios. Silicon steel, as a widely used traditional soft magnetic material, has the advantages of low cost, high saturation magnetization, small coercivity and the like. However, in the actual application process, the oriented silicon steel has more excellent magnetic properties, but its production process is complex and the material yield is low.

[0004] Therefore, it is one of the important goals of the application development in the magnetic field to research and develop a new type of metallic soft magnetic alloy system which has simple preparation process and simultaneously has high saturation magnetization and low coercivity. It is necessary to study a full transition group Co-V-Ti-Mn soft magnetic alloy and a preparation method thereof to overcome the deficiencies of the prior art, so as to solve or alleviate one or more of the above problems. SUMMARY

[0005] Therefore, the present application provides a full transition group Co-V-Ti-Mn soft magnetic alloy and a preparation method thereof. In view of the problems of complex preparation process, low material yield and insufficient comprehensive magnetic properties of the current industrial soft magnetic materials, multi-group element transition group metal elements are used for alloy design to strengthen the ferromagnetic interaction between atoms, and a heat treatment process is used in the preparation process to control the phase composition and eliminate the dendritic segregation of the initial ingot. A new type of Co-V-Ti-Mn soft magnetic alloy and a preparation method thereof are provided. The full transition group Co-V-Ti-Mn material has high saturation magnetization and low coercivity, and the preparation method is simple and easy to implement, and is suitable for batch industrial production.

[0006] In one aspect, the present application provides a full transition group Co-V-Ti-Mn soft magnetic alloy, the chemical formula of which is Co a V b Ti c Mn d (at.%) wherein 45≤a≤58, 10≤b≤23, 10≤c≤15, 10≤d≤20, and a+b+c+d=100.

[0007] Further to the aspect and any possible implementation mode as described above, the full transition group Co-V-Ti-Mn soft magnetic alloy has a BCC structure, and a Ti-rich second phase is uniformly distributed in the matrix, and the volume fraction of the Ti-rich second phase is not more than 5%.

[0008] Further to the aspect and any possible implementation mode as described above, the full transition group Co-V-Ti-Mn soft magnetic alloy has a saturation magnetization of 70-90emu / g and a coercivity of 0.1-2.0Oe.

[0009] Further to the full transition group soft magnetic alloy, when a=50, b=22, c=13, and d=15, Co 50 V 22 Ti 13 Mn 15 The soft magnetic alloy has a saturation magnetization of 83-89emu / g and a coercivity of 0.1-0.7Oe.

[0010] Further to the full transition group soft magnetic alloy, when a=51, b=19, c=15, and d=15, Co 51 V 19 Ti 15 Mn 15 The soft magnetic alloy has a saturation magnetization of 77-83emu / g and a coercivity of 1.4-2.0Oe.

[0011] Further to the full transition group soft magnetic alloy, when a=56, b=14, c=15, and d=15, Co 56 V 14 Ti 15 Mn 15 The soft magnetic alloy has a saturation magnetization of 76-82emu / g and a coercivity of 1.4-2.0Oe.

[0012] Further to the aspect and any possible implementation mode as described above, the present application further provides a preparation method of the full transition group Co-V-Ti-Mn soft magnetic alloy, the preparation method comprising the following steps:

[0013] Step 1: preparing a Coa V b Ti c Mn d (at.%) preset raw material ratio, Co, V, Ti and Mn elemental raw materials are selected according to the ratio and pretreated;

[0014] Step two: the pretreated elemental raw materials are arc melted for more than four times to obtain an alloy ingot;

[0015] Step three: the alloy ingot is subjected to homogenization heat treatment to obtain a Co-V-Ti-Mn soft magnetic alloy with high saturation magnetization and low coercivity.

[0016] According to the above-mentioned aspect and any possible implementation manner, further provided is an implementation manner, in the step one:

[0017] The purity of Co, V, Ti and Mn elemental raw materials is greater than 99.9wt.%;

[0018] The pretreatment process specifically comprises: after removing the oxide scale by sandpaper grinding, ultrasonic cleaning with anhydrous ethanol and sufficient drying;

[0019] The preset ratio is: according to the alloy chemical formula Co a V b Ti c Mn d (at.%) preset, wherein 45≤a≤58, 10≤b≤23, 10≤c≤15, 10≤d≤20, and a+b+c+d=100.

[0020] According to the above-mentioned aspect and any possible implementation manner, further provided is an implementation manner, in the step two, the arc melting process specifically comprises: the Co, V, Ti and Mn elemental raw materials weighed in step one are placed in a water-cooled copper crucible of a non-consumable vacuum arc melting furnace, wherein the Mn and V easy-splashing elements are placed in the bottom layer; the furnace body is vacuumed to 5×10 -3 Pa or below, then argon is filled to 0.04MPa for gas washing; then the furnace body is vacuumed again to 3.5×10 -3 Pa or below, and argon is filled to 0.04MPa; under the argon protective atmosphere, arc melting is carried out, and the melting is repeated for more than 4 times to obtain an alloy ingot.

[0021] According to the above-mentioned aspect and any possible implementation manner, further provided is an implementation manner, in the step three, the homogenization heat treatment specifically comprises: the alloy ingot prepared in step two is packaged into a quartz tube, vacuumed to 5×10 -4Pa below is filled with argon gas as a protective gas; the packaged quartz tube is placed in a 1200 DEG C box-type resistance furnace for homogenization heat treatment for 24h, and air-cooled to room temperature to obtain a Co-V-Ti-Mn soft magnetic alloy with high saturation magnetization and low coercivity.

[0022] Compared with the prior art, the application can obtain the following technical effects:

[0023] (1) The application discloses a new Co-V-Ti-Mn soft magnetic alloy by reasonably designing the components and proportion of transition group metal elements to strengthen the ferromagnetic interaction between atoms, and the alloy has not been reported in the prior art, which opens up a new research direction and material system for soft magnetic alloys.

[0024] (2) The Co-V-Ti-Mn alloy has high saturation magnetization (70-90emu / g) and ultra-low coercivity (0.1-2.0Oe), and has important application value in the field of electronic components such as inductors and filters.

[0025] (3) The preparation process of the Co-V-Ti-Mn soft magnetic alloy is simple, and excellent comprehensive magnetic properties can be obtained only by arc melting and homogenization heat treatment, and the operation process is simple, and the production efficiency is high.

[0026] Of course, any product implementing the application does not necessarily need to achieve all the technical effects described above. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0028] Figure 1 The XRD test curve of the Co-V-Ti-Mn alloy prepared for example 1; 50 V 22 Ti 13 Mn 15 alloy prepared for example 1;

[0029] Figure 2 The SEM microstructure diagram of the Co-V-Ti-Mn alloy prepared for example 1; 50 V 22 Ti 13 Mn 15 alloy prepared for example 1;

[0030] Figure 3 The Co-V-Ti-Mn alloy prepared for example 1;50 V 22 Ti 13 Mn 15 The magnetic properties test results of the alloy are shown in (a) as a hysteresis loop diagram and (b) as a magnified view of a portion of the hysteresis loop.

[0031] Figure 4 Co prepared in Example 2 51 V 19 Ti 15 Mn 15 XRD test curves of the alloy;

[0032] Figure 5 Co prepared in Example 2 51 V 19 Ti 15 Mn 15 SEM microstructure of the alloy;

[0033] Figure 6 Co prepared in Example 2 51 V 19 Ti 15 Mn 15 The magnetic properties test results of the alloy are shown in (a) as a hysteresis loop diagram and (b) as a magnified view of a portion of the hysteresis loop.

[0034] Figure 7 Co prepared in Example 3 56 V 14 Ti 15 Mn 15 XRD test curves of the alloy;

[0035] Figure 8 Co prepared in Example 3 56 V 14 Ti 15 Mn 15 SEM microstructure of the alloy;

[0036] Figure 9 Co prepared in Example 3 56 V 14 Ti 15 Mn 15 The results of the magnetic properties test of the alloy are shown in (a) as a hysteresis loop diagram and (b) as a magnified view of a portion of the hysteresis loop.

Detailed Implementation Methods

[0037] To better understand the technical solution of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] It should be noted that the embodiments described are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0039] The terms used in the embodiments of the present application are merely for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0040] The present application provides a low-coercivity Co-V-Ti-Mn soft magnetic alloy, the chemical composition of which is Co a V b Ti c Mn d (at.%), wherein 45≤a≤58, 10≤b≤23, 10≤c≤15, 10≤d≤20, and a+b+c+d=100.

[0041] The preparation process of the full-transition-group Co-V-Ti-Mn soft magnetic alloy described in the present application comprises the following steps:

[0042] Step one, weighing raw materials

[0043] Select Co, V, Ti, and Mn elemental raw materials with a purity greater than 99.9wt.%, polish them with sandpaper to remove the oxide skin, then ultrasonically clean them with anhydrous ethanol and dry them thoroughly. According to the alloy chemical formula Co a V b Ti c Mn d (at.%), use an electronic balance for precise weighing, wherein 45≤a≤58, 10≤b≤23, 10≤c≤15, 10≤d≤20, and a+b+c+d=100.

[0044] Step two, preparing alloy ingots

[0045] Put the Co, V, Ti, and Mn elemental raw materials weighed in step one into the water-cooled copper crucible of the non-consumable vacuum arc melting furnace, with Mn and V placed in the bottom layer to prevent spattering; after the furnace body is vacuumed to 5×10 -3 Pa or below, wash the gas by filling in argon gas to 0.04MPa; then vacuum again to 3.5×10 -3 Pa or below, fill in argon gas to 0.04MPa; under the protection of argon gas atmosphere, arc melting is carried out, and the alloy ingot is obtained after repeated melting for more than 4 times.

[0046] Step three, homogenization heat treatment

[0047] The alloy ingot prepared in step two is packaged into a quartz tube, vacuumed to 5×10 -4 Pa, and then filled with argon as a protective gas; the packaged quartz tube is placed in a 1200°C box-type resistance furnace, and homogenization heat treatment is performed for 24h, and then air-cooled to room temperature to obtain a Co-V-Ti-Mn soft magnetic alloy with high saturation magnetization and low coercivity.

[0048] The Co-V-Ti-Mn soft magnetic alloy prepared by this method has a BCC structure, and contains a small amount of micron-scale Ti-rich second phase in the matrix, and the volume fraction of the second phase is not more than 5%, and the second phase has little effect on the magnetic properties.

[0049] Example 1:

[0050] This embodiment discloses a full transition group Co 50 V 22 Ti 13 Mn 15 soft magnetic alloy, and specifically includes the following preparation steps:

[0051] Step one, weighing raw materials

[0052] Purity greater than 99.9wt.% Co, V, Ti, Mn elemental raw materials are selected, and after being polished with sandpaper to remove the oxide skin, they are ultrasonically cleaned with anhydrous ethanol and fully dried. According to the alloy chemical formula Co 50 V 22 Ti 13 Mn 15 (at.%) is precisely weighed using an electronic balance.

[0053] Step two, preparing an alloy ingot

[0054] The elemental raw materials weighed in step one are placed into a non-consumable vacuum arc melting furnace, and to prevent splashing during the melting process of Mn, it is placed at the bottom layer of the crucible, and then V, Co, Ti are sequentially placed, the furnace door is closed, the furnace body is vacuumed to 5×10 -3 Pa or lower, and then filled with argon to 0.04MPa for gas washing; then vacuumed again to 3.5×10 -3 Pa or lower, and filled with argon to 0.04MPa; under the protection of an argon atmosphere, arc melting is performed, the melting current is adjusted to 80-300A, and repeated melting is performed more than 4 times to obtain an alloy ingot.

[0055] Step three, homogenization heat treatment

[0056] The alloy ingot prepared in step two is packaged into a quartz tube, vacuumed to 5×10 -4 Pa or lower, and then filled with argon as a protective gas; the packaged quartz tube is placed in a 1200°C box-type resistance furnace, and homogenization heat treatment is performed for 24h, and then air-cooled to room temperature to obtain a Co 50 V22 Ti 13 Mn 15 soft magnetic alloy.

[0057] Figure 1 Co prepared in Example 1 50 V 22 Ti 13 Mn 15 The XRD test results of the alloy show that the soft magnetic alloy of the application has BCC structure at room temperature. Microstructure observation of the alloy shows that a small amount of Ti-rich second phase with a size of 3-6 μm is distributed in the alloy matrix, and the volume fraction is not more than 2%. Figure 2 The secondary electron image of the alloy prepared in Example 1 shows that a small amount of Ti-rich second phase with a size of 3-6 μm is distributed in the alloy matrix, and the volume fraction is not more than 2%. Figure 3 The magnetic property test results of the alloy show that the coercivity of the prepared alloy is only 0.45 Oe, and the saturation magnetization is as high as 86 emu / g, which is a soft magnetic alloy with excellent performance.

[0058] Example 2

[0059] The embodiment discloses a full transition group Co 51 V 19 Ti 15 Mn 15 soft magnetic alloy, specifically comprising the following preparation steps:

[0060] Step one, weighing raw materials

[0061] Select Co, V, Ti and Mn single element raw materials with a purity of more than 99.9 wt.%, polish them with sandpaper to remove the oxide skin, then ultrasonically clean them with anhydrous ethanol and dry them thoroughly. According to the chemical formula Co 51 V 19 Ti 15 Mn 15 (at.%) are precisely weighed by an electronic balance.

[0062] Step two, preparing alloy ingot

[0063] Put the single element raw materials weighed in step one into a non-consumable vacuum arc melting furnace. To prevent splashing during the melting process of Mn, place it at the bottom layer of the crucible, then place V, Co and Ti in turn, close the furnace door, vacuum the furnace body to 5×10 -3 Pa or below, then fill argon gas to 0.04 MPa for gas washing; then vacuum again to 3.5×10 -3 Pa or below, and fill argon gas to 0.04 MPa; under the protection of argon gas atmosphere, arc melting is carried out, the melting current is adjusted to 80-300 A, and the alloy ingot is obtained after repeated melting for more than 4 times.

[0064] Step three, homogenization heat treatment

[0065] The alloy ingot prepared in step two is sealed in a quartz tube, vacuumed to 5x10 -4 Pa, and then filled with argon as a protective gas; the sealed quartz tube is placed in a 1200℃ box-type resistance furnace, and homogenized heat treatment is performed for 24h to obtain a Co 51 V 19 Ti 15 Mn 15 soft magnetic alloy.

[0066] Figure 2 The Co 51 V 19 Ti 15 Mn 15 alloy prepared in Example 2 is subjected to XRD testing, and it can be seen from the figure that the soft magnetic alloy of the application has a BCC structure at room temperature; Figure 2 is a secondary electron image of the alloy, and it can be seen from the figure that a small amount of Ti-rich second phase with a size of 3-6μm is distributed on the alloy matrix, and the volume fraction is not more than 2%;

[0067] Figure 3 The magnetic property of the alloy prepared in Example 2 is tested, and the coercivity of the alloy is only 1.7Oe, and the saturation magnetization is as high as 80emu / g, which is a soft magnetic alloy with excellent comprehensive performance.

[0068] Example 3:

[0069] The embodiment discloses a full transition group Co 56 V 14 Ti 15 Mn 15 soft magnetic alloy, and specifically comprises the following preparation steps:

[0070] Step one, weighing raw materials

[0071] Co, V, Ti and Mn single-element raw materials with a purity of greater than 99.9wt.% are selected, and after being polished with sandpaper to remove the oxide skin, they are ultrasonically cleaned with anhydrous ethanol and fully dried. According to the alloy chemical formula Co 56 V 14 Ti 15 Mn 15 (at.%) are precisely weighed by using an electronic balance.

[0072] Step two, preparing an alloy ingot

[0073] The single-element raw materials weighed in step one are placed in a non-consumable vacuum arc melting furnace, and in order to prevent splashing during the melting process of Mn, the Mn is placed at the bottom layer of the crucible, and then V, Co and Ti are sequentially placed, the furnace door is closed, and the furnace body is vacuumed to 5x10 -3Pa, and then argon is filled to 0.04 MPa to perform gas washing; then vacuum is extracted to 3.5*10 -3 Pa, and then argon is filled to 0.04 MPa; arc melting is performed under the argon protection atmosphere, the melting current is adjusted to 80-300 A, and the alloy ingot is obtained after repeated melting for more than 4 times.

[0074] Step three, homogenization heat treatment

[0075] The alloy ingot prepared in step two is packaged into a quartz tube, vacuum is extracted to 5*10 -4 Pa, and then argon is filled to 0.04 MPa to perform gas washing; then vacuum is extracted to 3.5*10 56 V 14 Ti 15 Mn 15 soft magnetic alloy.

[0076] Figure 3 The XRD test result of the Co 56 V 14 Ti 15 Mn 15 alloy prepared in example 3, as shown in the figure, the soft magnetic alloy of the present application is BCC structure at room temperature; Figure 2 is the secondary electron image of the alloy, as shown in the figure, a small amount of Ti-rich second phase with a size of 3-6 μm is distributed on the alloy matrix, and the volume fraction is not more than 2%; Figure 3 The magnetic performance test of the Co 56 V 14 Ti 15 Mn 15 alloy prepared in example 2, the coercivity of the alloy is only 1.7 Oe, and the saturation magnetization is as high as 79 emu / g, which is a soft magnetic alloy with excellent comprehensive performance.

[0077] The microstructure of the alloy prepared in the above examples contains a small amount of Ti-rich second phase, which is caused by the small solid solubility of the alloy to Ti element, and has little effect on the soft magnetic performance of the alloy.

[0078] The above provides a kind of full transition group Co-V-Ti-Mn soft magnetic alloy and its preparation method provided by the embodiment of the present application. The above embodiment is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, the specific embodiment and application range will be changed; according to the above, the content of the specification should not be understood as the limitation of the present application.

[0079] As used in the specification and claims, certain terms have particular meanings. One skilled in the art will understand that different manufacturers can refer to a component by different names. The specification and claims should not be construed as limited to components by a particular name, but should be construed by the component's function. As used in the specification and claims, "comprising" and "including" are meant to be interpreted as specifying open-ended claims that are not limited to the listed elements. "Approximately" means within an acceptable error range for the corresponding function, which will vary from one context to another. The description that follows is intended to provide a better understanding of the preferred embodiments of the present application, and is not intended to be a complete description of all possible embodiments of the present application. The description serves only to illustrate the general principles of the present application, and is not meant to limit the present application to specific embodiments.

[0080] It should also be noted that the terms "comprising," "including," and "having" or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a process, product, or composition that comprises a list of elements is not necessarily limited to only those elements but can include other elements not expressly listed or inherent to such process, product, or composition. An element proceeded by "comprises... a" does not, without further recitation, preclude the existence of additional elements of the same type in the process, product, or composition.

[0081] It should be understood that the term "and / or" as used herein is merely an open-ended descriptive term indicating that three conditions exist, for example, A and / or B can mean: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " as used herein generally represents an "or" relationship between the front and rear associated objects.

[0082] The above specification and description of various preferred embodiments of the present application has been presented for the purpose of illustration and description. It is not intended to be exhaustive or to limit the application to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching or knowledge of the skilled artisan, or logical deductions permitted under the doctrines of equivalents to the extent that such do not depart from the spirit and scope of the application. Changes can be made to the details of the application without departing from the underlying principles disclosed above, the preferred embodiments being thus indicated to be illustrative only. The particular implementation described is indicative of an application that can be practiced with the subject matter disclosed.

Claims

1. A full transition group Co-V-Ti-Mn soft magnetic alloy, characterized by, The full transition group Co-V-Ti-Mn soft magnetic alloy has a chemical formula of Co a V b Ti c Mn d (at. %), wherein 45 ≤ a ≤ 58, 10 ≤ b ≤ 23, 10 ≤ c ≤ 15, 10 ≤ d ≤ 20, a+b+c+d=100; The full transition group Co-V-Ti-Mn soft magnetic alloy has a BCC structure, and a Ti-rich second phase is uniformly distributed in the matrix, and the volume fraction of the Ti-rich second phase is not more than 5%; The full transition group Co-V-Ti-Mn soft magnetic alloy has a saturation magnetization of 70-90 emu / g and a coercivity of 0.1-2.0 Oe.

2. The all-transition-group Co-V-Ti-Mn soft magnetic alloy according to claim 1, characterized by, Co when a = 50, b = 22, c = 13, d = 15 50 V 22 Ti 13 Mn 15 The soft magnetic alloy has a saturation magnetization of 83-89 emu / g and a coercivity of 0.1-0.7 Oe.

3. The all-transition-group Co-V-Ti-Mn soft magnetic alloy according to claim 2, characterized by, Co when a = 51, b = 19, c = 15, d = 15 51 V 19 Ti 15 Mn 15 The soft magnetic alloy has a saturation magnetization of 77-83 emu / g and a coercivity of 1.4-2.0 Oe.

4. The all-transition-group Co-V-Ti-Mn soft magnetic alloy according to claim 2, characterized by, Co when a = 56, b = 14, c = 15, d = 15 56 V 14 Ti 15 Mn 15 The soft magnetic alloy has a saturation magnetization of 76-82 emu / g and a coercivity of 1.4-2.0 Oe.

5. A method for producing a soft magnetic alloy of the full transition group Co-V-Ti-Mn, for producing the soft magnetic alloy of the full transition group Co-V-Ti-Mn according to any one of claims 1 to 4, characterized in that The preparation method comprises the following steps: Step one: according to the alloy chemical formula Co a V b Ti c Mn d (at. %) preset raw material ratio, select Co, V, Ti and Mn elemental raw materials according to the ratio and pretreat. Step two: performing at least four times of arc melting on the pretreated elemental raw materials to obtain an alloy ingot; Step three: performing homogenization heat treatment on the alloy ingot to obtain a Co-V-Ti-Mn soft magnetic alloy with high saturation magnetization and low coercivity.

6. The method of producing a full transition group Co-V-Ti-Mn soft magnetic alloy according to claim 5, characterized by, In the step one: The purity of the elemental raw materials of Co, V, Ti and Mn is greater than 99.9 wt.%; The pretreatment process specifically comprises: removing the oxide scale by sanding, ultrasonic cleaning with anhydrous ethanol and sufficient drying; The preset ratio is: according to the alloy chemical formula Co a V b Ti c Mn d (at. %) preset, wherein 45 ≤ a ≤ 58, 10 ≤ b≤23, 10 ≤ c ≤ 15, 10 ≤ d ≤ 20, a+b+c+d=100.

7. The method of producing a full transition group Co-V-Ti-Mn soft magnetic alloy according to claim 5, characterized by, The arc melting process in the second step is as follows: the Co, V, Ti and Mn elementary materials weighed in the first step are put into a water-cooled copper crucible of a non-consumable vacuum arc melting furnace, wherein the Mn and V easy-splashing elements are placed in the bottom layer; the furnace body is vacuumized to 5*10 -3 Pa, argon is filled to 0.04 MPa to perform gas washing; then the furnace body is vacuumized to 3.5*10 -3 Pa again, argon is filled to 0.04 MPa; arc melting is performed under the argon protective atmosphere, and the alloy ingot is obtained after repeated melting for more than 4 times.

8. The method of producing a full transition group Co-V-Ti-Mn soft magnetic alloy according to claim 5, characterized by, The homogenization heat treatment in the third step is specifically as follows: the alloy ingot prepared in the second step is packaged into a quartz tube, vacuumized to 5×10 -4 Pa, then argon is filled as a protective gas; the packaged quartz tube is placed in a 1200 ℃ box-type resistance furnace for homogenization heat treatment for 24 h, and air-cooled to room temperature to obtain a Co-V-Ti-Mn soft magnetic alloy with high saturation magnetization and low coercivity.

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