CN112620632A - Method for modifying powder metallurgy magnetic material based on pulsed magnetic field - Google Patents
Method for modifying powder metallurgy magnetic material based on pulsed magnetic field Download PDFInfo
- Publication number
- CN112620632A CN112620632A CN202011371941.8A CN202011371941A CN112620632A CN 112620632 A CN112620632 A CN 112620632A CN 202011371941 A CN202011371941 A CN 202011371941A CN 112620632 A CN112620632 A CN 112620632A
- Authority
- CN
- China
- Prior art keywords
- magnetic field
- pulsed magnetic
- pulsed
- powder metallurgy
- materials based
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 119
- 239000000696 magnetic material Substances 0.000 title claims abstract description 27
- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 230000005415 magnetization Effects 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 239000010941 cobalt Substances 0.000 claims description 4
- 229910017052 cobalt Inorganic materials 0.000 claims description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 4
- 239000000470 constituent Substances 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 238000002715 modification method Methods 0.000 claims 2
- 238000002955 isolation Methods 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 230000006698 induction Effects 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 229910017061 Fe Co Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 229910002546 FeCo Inorganic materials 0.000 description 2
- 244000137852 Petrea volubilis Species 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000002932 luster Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- QVYYOKWPCQYKEY-UHFFFAOYSA-N [Fe].[Co] Chemical compound [Fe].[Co] QVYYOKWPCQYKEY-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000036314 physical performance Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/04—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering with simultaneous application of supersonic waves, magnetic or electric fields
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
Abstract
本发明公开了一种基于脉冲磁场对粉末冶金磁性材料的改性方法，属于磁性材料技术领域，包括以下步骤：S1，获得表面清洁平整的待处理零件；S2，获得待处理零件的信息，包括零件外表面具有的几何形状、零件的最大截面尺寸、零件的成分组成、零件的晶粒尺寸、零件的材料密度和零件的电阻率；S3，根据S2获得的零件材料密度、电阻率等信息确定脉冲磁场的参数，包括脉冲磁场的方向、峰值强度、频率和脉冲数量；S4，将零件放入脉冲磁场中；S5，释放脉冲磁场，完成脉冲磁场处理。
The invention discloses a method for modifying powder metallurgy magnetic materials based on a pulsed magnetic field, which belongs to the technical field of magnetic materials and includes the following steps: S1, obtaining parts to be processed with clean and flat surfaces; The geometry of the outer surface of the part, the maximum cross-sectional size of the part, the composition of the part, the grain size of the part, the material density of the part and the resistivity of the part; S3, determined according to the information of the material density and resistivity of the part obtained from S2 The parameters of the pulsed magnetic field, including the direction, peak intensity, frequency and number of pulses of the pulsed magnetic field; S4, put the parts into the pulsed magnetic field; S5, release the pulsed magnetic field to complete the pulsed magnetic field processing.
Description
Technical Field
The invention belongs to the technical field of magnetic materials, and particularly relates to a method for modifying a powder metallurgy magnetic material based on a pulsed magnetic field.
Background
As a functional material with special physical properties, magnetic materials are widely used in electrical and electronic devices. With the development of science and technology, higher requirements are made on electromagnetic parts made of magnetic materials, and besides the requirements for more excellent physical properties such as saturation magnetic strength and magnetic conductivity, the electromagnetic parts also have good comprehensive mechanical properties, and in many occasions, new requirements are also made on the miniaturization of the electromagnetic parts. At present, the main process method for preparing the small-sized magnetic material electromagnetic part is powder metallurgy, and the formed electromagnetic part is obtained through original magnetic material powder.
The main post-treatment means for improving the performance of the powder metallurgy magnetic material part is to perform tempering and annealing treatment on the part after the part is formed, so as to improve the matrix structure of the part and eliminate residual stress, thereby improving the physical performance and the comprehensive mechanical performance of the magnetic material powder metallurgy part. However, the traditional heat treatment method has high energy consumption and long treatment period, and inevitable burning loss occurs on small parts. Therefore, a process for modifying magnetic material powder metallurgy parts, which is efficient, environment-friendly and miniaturized, is needed.
Disclosure of Invention
The invention aims to provide a method for modifying a powder metallurgy magnetic material based on a pulse magnetic field, and solves the technical problems that the traditional heat treatment method in the prior art is high in energy consumption and long in treatment period, and inevitable burning loss occurs on small parts.
The invention provides a method for modifying a powder metallurgy magnetic material based on a pulse magnetic field, which comprises the following steps:
s1, obtaining a part to be processed with a clean and flat surface;
s2, obtaining information of the part to be processed, including the geometric shape of the outer surface of the part, the maximum section size of the part, the composition of the part, the grain size of the part, the material density of the part and the resistivity of the part;
s3, determining parameters of the pulse magnetic field according to the information such as the density and the resistivity of the part material obtained in the step S2, wherein the parameters comprise the direction, the peak intensity, the frequency and the pulse number of the pulse magnetic field;
s4, placing the part into a pulse magnetic field;
and S5, releasing the pulse magnetic field and finishing the pulse magnetic field treatment.
Further, when the total content of iron, cobalt and nickel in the parts is lower than 70% in the step S2, a bidirectional pulse magnetic field is used; when the total content is higher than 70%, a unidirectional pulsed magnetic field is used.
Further, in the step S3, the peak intensity of the sample whose saturation magnetization can be directly measured is set to be between the saturation magnetization of the sample and the theoretical maximum magnetic saturation intensity of the sample.
Further, in step S3, the saturation magnetization cannot be directly measured, and a sample of the part which has no national standard reference is not obtained, and the peak intensity of the pulsed magnetic field is set to be between the minimum value and the maximum value of the saturation magnetization of each constituent element in the sample.
Further, when the waveform of the pulsed magnetic field is a chord curve in step S3, the formula is shown
And calculating the energy loss of the part in the pulsed magnetic field, and controlling the energy loss to be less than 15% of the total energy input.
In the above formula, P is the energy consumption (W/kg) of the unit mass of the part; k is a constant, 2 is taken for parts with curved surfaces, and 1 is taken for parts without curved surfaces; bp is the pulsed magnetic field peak intensity; d is the dimension of the part at the maximum wall thickness; f is the frequency of the pulse magnetic field to be set; ρ is the part material resistivity; and D is the density of the part material.
Further, in step S3, the total time for which the part is subjected to the magnetic field treatment is longer than 10S, based on the waveform of the pulsed magnetic field.
Further, in step S4, the area where the outer surface of the part is perpendicular to and parallel to the magnetic induction line is maximized.
Further, the part is one in step S4, and is placed in the central area of the magnetic field processing apparatus.
Further, in step S4, the number of the parts is multiple, and the minimum distance between two adjacent parts should be greater than the maximum physical requirement size of a single part.
Further, in step S4, the component is fixed by a non-magnetic and non-electric vibration-proof device.
The invention has the beneficial effects that:
1. the ferromagnetic material is modified by using the pulsed magnetic field as an energy source, so that the energy consumption is low, the processing time is short, and the efficiency is high. The pulse magnetic field parameters are easy to adjust, the parts do not need further treatment after being treated by the pulse magnetic field, the steps are simple, and the parts with small sizes and small batches can be quickly treated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a diagram of grain boundary morphology of an Fe-Co soft magnetic part without being treated by a pulsed magnetic field;
FIG. 2 is a waveform of a pulse magnetic field used in a pulse magnetic field treatment of an Fe-Co soft magnetic part;
FIG. 3 is a diagram of grain boundary morphology of the Fe-Co soft magnetic part subjected to pulsed magnetic field treatment;
FIG. 4 is a microstructure SEM photograph of a FeCoV part which is not treated by a pulsed magnetic field in example 2;
FIG. 5 is a diagram illustrating the waveform parameters of the pulsed magnetic field used in the pulsed magnetic field treatment of FeCoV parts in example 2;
FIG. 6 is a microstructure SEM photograph of FeCoV parts subjected to pulsed magnetic field treatment in example 2;
FIG. 7 is a hysteresis loop of FeCoV parts before and after pulsed magnetic field treatment in example 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally arranged when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, which are merely used for convenience of description and simplification of description, and do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
The embodiment of the invention provides a method for modifying a powder metallurgy magnetic material based on a pulse magnetic field, wherein parts of the powder metallurgy magnetic material to be processed are prepared by the following steps of (1): 1, polishing the surface of the cylindrical FeCo soft magnetic part by using sand paper until the part is bright and has metallic luster, removing a surface oxide layer, and cleaning by using an ultrasonic cleaner and using absolute ethyl alcohol as a medium to obtain a part to be treated with a clean and flat surface;
the dimensions of the cylindrical FeCo soft-magnetic part were measured to be a diameter of 8mm x a height of 10mm, with a composition of 50 w% Fe and 50 wt% Co; the microstructure and grain size of the sample are shown in FIG. 1, and the density of the part is 7.68g/cm3The resistivity was 8.16. omega. m;
determining parameters of the pulsed magnetic field: the component composition of the part is 100% composed of iron and cobalt, so a unidirectional pulsed magnetic field is used;
analyzing theoretical magnetic saturation intensity of each component in the part according to the maximum magnetic saturation intensity and phase composition of the constituent elements of the part, and setting the peak intensity 1T of a pulse magnetic field to be between the maximum saturation intensity and the minimum saturation intensity of different components by estimating about 1.1T of Fe and about 0.8T of Co;
in this embodiment, the waveform of the pulsed magnetic field is a sawtooth wave as shown in FIG. 2, and a so-called pulsed magnetic field frequency of 0.1Hz is used according to the performance of the magnetic treatment apparatus;
in this embodiment, the pulsed magnetic field single magnetic treatment has a magnetic field time of 0.05s or more as shown in FIG. 2, and thus the number of pulses of the pulsed magnetic field is set to 20 times;
the parts in the embodiment are cylindrical, so that the upper circular bottom surface and the lower circular bottom surface of the part are set to be perpendicular to the magnetic induction lines, and the side surfaces of the part are arranged to be parallel to the magnetic induction lines;
placing the part in the central area of magnetic treatment equipment, and pressing the part to be treated from two ends by using a rubber pressure head;
and releasing the pulse magnetic field, and finishing the pulse magnetic field treatment after the pulse magnetic field is released.
The performance of the iron-cobalt soft magnetic part subjected to the pulse magnetic treatment is measured, and the following beneficial effects are achieved: testing the hardness of the part, wherein the hardness of the part is increased from 283.3HV to 290.2 HV; the residual stress is reduced from-233.67 MPa to-121.23 MPa; the saturation magnetic strength of unit mass is increased from 6.2emu/g to 8emu/g, and the initial magnetic conductivity is increased by 1.73 times; the low-angle grain boundaries in the matrix structure of the part are effectively eliminated, as shown in FIG. 3.
Example 2
In this embodiment, as a preferred embodiment of the present invention, the powder metallurgy magnetic part to be processed is a ring-shaped magnetic part of Fe48-Co50-2V, the surface of the part is polished by sand paper until the part is bright and has metallic luster, the oxide layer on the surface is removed, and the part to be processed with a clean and flat surface is obtained by using an ultrasonic cleaner and absolute ethyl alcohol as a medium for cleaning;
measuring the sizes of the annular FeCoV soft magnetic part to be 4mm in inner diameter, 8mm in outer diameter and 10mm in height, wherein the annular FeCoV soft magnetic part comprises 48 wt% of Fe, 50 wt% of Co and 2 wt% of V; the microstructure and grain size of the sample are shown in FIG. 4, and the density of the part is 7.98g/cm3Resistivity of 0.27 μ Ω · m;
determining parameters of the pulsed magnetic field;
the total mass fraction of iron and cobalt in the component composition of the part reaches 98 percent, so a unidirectional pulse magnetic field is used;
obtaining the saturation magnetization of the sample to be 1.2T according to the measured hysteresis loop of the sample, wherein the theoretical maximum magnetic saturation of the sample is 2.2T, so that the peak intensity of the pulse magnetic field is set to be 1.5T;
in this embodiment, the waveform of the pulsed magnetic field is as shown in fig. 5, and is a sawtooth waveform, so that the efficiency of the pulsed magnetic field treatment is improved as much as possible on the premise of ensuring that the energy loss meets the requirement, and a so-called pulsed magnetic field frequency of 0.1Hz is adopted;
in this embodiment, the pulsed magnetic field single treatment has a magnetic field time of 0.05s or more, as shown in FIG. 5, and thus the number of pulsed magnetic field pulses is set to 200 times;
the geometric shape of the part in the embodiment is a cylindrical ring, so that the bottom surfaces of the upper ring and the lower ring of the part are set to be vertical to the direction of the magnetic induction line, and the side surfaces of the part are arranged in parallel to the direction of the magnetic induction line;
placing the part in the central area of magnetic treatment equipment, and pressing the part to be treated from two ends by using a rubber pressure head;
and releasing the pulse magnetic field, and finishing the pulse magnetic field treatment after the pulse magnetic field is released.
The performance test of the FeCoV part subjected to the pulse treatment has the following beneficial effects: the microstructure observation can observe Fe between grain boundaries2The impurity phase of the Co complex is obviously reduced, and the matrix structure of the sample is improved, as shown in figure 6; the magnetic hysteresis loop of the sample is further tested, the magnetic saturation intensity of the sample is improved from 4.60emu/g to 7.35emu/g due to the reduction of the impurity phase, the magnetic permeability is also obviously improved, and the magnetic hysteresis loop of the sample is shown in figure 7.
The invention is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011371941.8A CN112620632B (en) | 2020-11-30 | 2020-11-30 | Method for modifying powder metallurgy magnetic material based on pulsed magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011371941.8A CN112620632B (en) | 2020-11-30 | 2020-11-30 | Method for modifying powder metallurgy magnetic material based on pulsed magnetic field |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112620632A true CN112620632A (en) | 2021-04-09 |
| CN112620632B CN112620632B (en) | 2022-09-06 |
Family
ID=75306720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011371941.8A Active CN112620632B (en) | 2020-11-30 | 2020-11-30 | Method for modifying powder metallurgy magnetic material based on pulsed magnetic field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112620632B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115369234A (en) * | 2022-08-26 | 2022-11-22 | 武汉理工大学 | Method for regulating and controlling metal material structure by using electromagnetic composite field non-thermal effect |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4873605A (en) * | 1986-03-03 | 1989-10-10 | Innovex, Inc. | Magnetic treatment of ferromagnetic materials |
| JP2002285240A (en) * | 2001-03-26 | 2002-10-03 | Univ Osaka | Method for producing material having oriented structure or anisotropic structure |
| CN1554782A (en) * | 2003-12-29 | 2004-12-15 | 北京恒泰和科技有限责任公司 | Magnetically modifying method for increasing ferro magnetic metal wear resistance |
| CN101713021A (en) * | 2009-09-23 | 2010-05-26 | 清华大学 | Method for reducing residual stress of ferromagnetic metal material |
| US20110267121A1 (en) * | 2010-04-19 | 2011-11-03 | Jiles David C | Apparatus and method for altering the properties of materials by processing through the application of a magnetic field |
| US20120153212A1 (en) * | 2007-12-21 | 2012-06-21 | Liu J Ping | Bulk Nanocomposite Magnets and Methods of Making Bulk Nanocomposite Magnets |
| CN105206379A (en) * | 2015-10-21 | 2015-12-30 | 武汉理工大学 | Method for reducing specific electrical resistance of ferro-magnetic metal material |
| CN109972021A (en) * | 2019-03-25 | 2019-07-05 | 东南大学 | Preparation method of high saturation magnetization Fe-P powder metallurgy magnetic friction material |
| CN109979707A (en) * | 2019-03-29 | 2019-07-05 | 武汉理工大学 | A kind of method of Electromagnetic Treatment debugging metal works hardness distribution |
| CN110129522A (en) * | 2019-05-20 | 2019-08-16 | 北京理工大学 | Magnetic Pulse Heat Treatment Technology for High Entropy Alloys |
| CN110343816A (en) * | 2019-07-12 | 2019-10-18 | 武汉理工大学 | A method of using electricity, magnetic and electromagnetic coupling pulse modifier metal parts |
| CN111678933A (en) * | 2020-05-29 | 2020-09-18 | 中国人民解放军陆军装甲兵学院 | Method for analyzing influence of pulsed magnetic field treatment on microstructure of metal part |
-
2020
- 2020-11-30 CN CN202011371941.8A patent/CN112620632B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4873605A (en) * | 1986-03-03 | 1989-10-10 | Innovex, Inc. | Magnetic treatment of ferromagnetic materials |
| JP2002285240A (en) * | 2001-03-26 | 2002-10-03 | Univ Osaka | Method for producing material having oriented structure or anisotropic structure |
| CN1554782A (en) * | 2003-12-29 | 2004-12-15 | 北京恒泰和科技有限责任公司 | Magnetically modifying method for increasing ferro magnetic metal wear resistance |
| US20120153212A1 (en) * | 2007-12-21 | 2012-06-21 | Liu J Ping | Bulk Nanocomposite Magnets and Methods of Making Bulk Nanocomposite Magnets |
| CN101713021A (en) * | 2009-09-23 | 2010-05-26 | 清华大学 | Method for reducing residual stress of ferromagnetic metal material |
| US20110267121A1 (en) * | 2010-04-19 | 2011-11-03 | Jiles David C | Apparatus and method for altering the properties of materials by processing through the application of a magnetic field |
| CN105206379A (en) * | 2015-10-21 | 2015-12-30 | 武汉理工大学 | Method for reducing specific electrical resistance of ferro-magnetic metal material |
| CN109972021A (en) * | 2019-03-25 | 2019-07-05 | 东南大学 | Preparation method of high saturation magnetization Fe-P powder metallurgy magnetic friction material |
| CN109979707A (en) * | 2019-03-29 | 2019-07-05 | 武汉理工大学 | A kind of method of Electromagnetic Treatment debugging metal works hardness distribution |
| CN110129522A (en) * | 2019-05-20 | 2019-08-16 | 北京理工大学 | Magnetic Pulse Heat Treatment Technology for High Entropy Alloys |
| CN110343816A (en) * | 2019-07-12 | 2019-10-18 | 武汉理工大学 | A method of using electricity, magnetic and electromagnetic coupling pulse modifier metal parts |
| CN111678933A (en) * | 2020-05-29 | 2020-09-18 | 中国人民解放军陆军装甲兵学院 | Method for analyzing influence of pulsed magnetic field treatment on microstructure of metal part |
Non-Patent Citations (1)
| Title |
|---|
| 李桂杰等: "《材料物理性能》", 31 December 2018, 中国矿业大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115369234A (en) * | 2022-08-26 | 2022-11-22 | 武汉理工大学 | Method for regulating and controlling metal material structure by using electromagnetic composite field non-thermal effect |
| CN115369234B (en) * | 2022-08-26 | 2023-11-03 | 武汉理工大学 | Methods to control the structure of metal materials using the non-thermal effects of electromagnetic composite fields |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112620632B (en) | 2022-09-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103305743B (en) | Method for preparing pure iron and iron-phosphorus magnetically soft alloy product through powder metallurgy process | |
| CN108461270B (en) | Preparation method of low-loss amorphous magnetic powder core | |
| TW201621932A (en) | Soft-magnetic flat powder and process for producing same | |
| CN112620632B (en) | Method for modifying powder metallurgy magnetic material based on pulsed magnetic field | |
| Zhang et al. | Structural and magnetic properties of flaky FeSiB/Al2O3 soft magnetic composites with orientation of a magnetic field | |
| CN103730225A (en) | Method for preparing amorphous soft magnetic powder core | |
| CN112935256A (en) | Method for modifying non-ferromagnetic powder sintered metal parts based on pulsed magnetic field | |
| Nesbitt | The magnetostriction of permanent magnet alloys | |
| US2818514A (en) | Stressed ferrite cores | |
| CN113223845A (en) | Insulating coating method of soft magnetic alloy powder | |
| CN112461916B (en) | A Magnetic Barkhausen Noise Detection and Inversion Method for Magnetic Thin Film Characteristic Index | |
| Iordache et al. | Effect of mechanical strains on the magnetic properties of electrical steels | |
| CN103551565B (en) | The manufacture method of soft magnet silicon, aluminum and nickel alloy powder | |
| CN108987020B (en) | Method for reducing surface magnetic difference of two surfaces of sintered neodymium iron boron magnet cutting black sheet | |
| CN108305737B (en) | A kind of compound soft magnetic material and preparation method thereof | |
| CN105206379B (en) | A kind of method for reducing ferromagnetic metal material resistivity | |
| Gandomzadeh et al. | Magnetostrictive behavior of pure nickel core: A study on the effects of annealing and magnetization using VSM and optical microscopy techniques | |
| CN108364741B (en) | A kind of low core damage FeSiAlNi base compound soft magnetic material and preparation method thereof | |
| CN113161096B (en) | Co-based alloy TM-M/ML amorphous rare earth composite magnetic material and preparation method thereof | |
| CN115921879B (en) | A method for improving the Q value of soft magnetic iron powder | |
| Tang et al. | Tailoring the microstructure of NiZn ferrite for power field applications | |
| TWI861078B (en) | Soft magnetic alloy powder, electronic component and manufacturing method thereof | |
| Bing | Application of electromagnetic acoustic in steel pipe inspection | |
| Yoon et al. | Separation of circumferential magnetic components from MI spectra in laser-annealed Co-based amorphous microwires | |
| Rudenko et al. | Magnetoelastic waves in parametrically active nickel ferrite spinels |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220124 Address after: 610000 floor 3, No. 2-305, tongshunqiao street, Qingyang District, Chengdu, Sichuan Applicant after: Chengdu Kunwu Technology Co.,Ltd. Address before: 610065, No. 24, south section of Ring Road, Sichuan, Chengdu Applicant before: SICHUAN University |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |