Method for preparing high performance SmCo permanent magnet material

Abstract

The invention relates to a method for preparing a high performance SmCo permanent magnet material and belongs to the field of preparation of rare earth permanent magnet materials. The method includes that Sm (Col-u-v-wCuuFevZrw) z is used for preparing the SmCo permanent magnet material through processes of smelting, milling, compression molding, sintering, solid solution, magnetic field aging treatment, magnetic field post-heat treatment and the like. The permanent magnet material obtained after the magnetic field aging treatment or the magnetic field post-heat treatment can induce magnetic uniaxial anisotropy in the filed, the orientation degree is increased, so that the magnetic performance of the SmCo permanent magnet material is improved substantially.

Description

technical field

[0001] The invention relates to a method for preparing permanent magnet materials, in particular to a method for preparing high-performance SmCo permanent magnet materials. Background technique

[0002] Rare earth permanent magnet material is a new type of functional material developed since the 1960s. It is a permanent magnet material based on an intermetallic compound formed by rare earth metals and 3d transition metals. The remanence Br, coercive force Hc and maximum magnetic energy product (BH)max of rare earth permanent magnet materials are generally very high, making them widely used in microwave communication technology, audio-visual technology, electrical engineering, instrument technology, computer technology, automation technology, transportation It has been widely used in transportation, petrochemical engineering, magnetization technology, magnetic separation technology, bioengineering and magnetic medical and fitness equipment.

[0003] 2:17 type...

Examples

Embodiment 1

[0036] The constant magnetic field environment is stabilized at 850°C for primary aging. Its specific process steps are as follows:

[0037] Remove the surface oxides of metal materials Sm, Co, Cu, Fe, Zr and break them into lumps suitable for smelting. Then press the ingredients in Table 1.

[0038] Table 1

[0039] components

SM

co

Fe

Cu

Zr

weight percentage (%)

24.5

49.5

14

9

3

[0040] according to figure 1 The following process steps are carried out as shown: Put the prepared raw materials into a vacuum induction furnace for melting at 1325°C, turn the alloy over and melt it 4 times. Then the alloy ingot is coarsely crushed and passed through a 40-mesh sieve (0.45mm mesh), and the powder obtained through the 40-mesh pass is ball-milled with gasoline as a medium, and taken out after ball-milling to 4-8 μm. The powder is dried in the air, and then shaped under a vertical magnetic field greater t...

Embodiment 2

[0044] During the secondary aging at 450°C, the constant magnetic field environment was stabilized. Its specific process steps are as follows:

[0045] Remove the surface oxides of metal materials Sm, Co, Cu, Fe, Zr and break them into lumps suitable for smelting. Then press the ingredients in Table 2.

[0046] Table 2

[0047] components

SM

co

Fe

Cu

Zr

weight percentage (%)

23.5

48.5

16

10

2

[0048] according to figure 2 The following process steps are carried out as shown: put the prepared raw materials into a vacuum induction furnace for melting at 1320°C, and turn the alloy over for 5 times of melting. Then the alloy ingot is coarsely crushed and passed through a 40-mesh sieve (0.45mm mesh), and the powder obtained through the 40-mesh pass is ball-milled with gasoline as a medium, and taken out after ball-milling to 4-8 μm. The powder is dried in the air, and then shaped under a vertical magn...

Embodiment 3

[0052] The constant magnetic field environment was added to both the primary aging at 850°C and the secondary aging at 450°C. Its specific process steps are as follows:

[0053] Remove the surface oxides of metal materials Sm, Co, Cu, Fe, Zr and break them into lumps suitable for smelting. Then press the ingredients in Table 3.

[0054] table 3

[0055] components

SM

co

Fe

Cu

Zr

weight percentage (%)

25.5

47.5

14

10

3

[0056] according to image 3 The following process steps are carried out as shown: Put the prepared raw materials into a vacuum induction furnace for melting at 1330°C, and turn the alloy over for 3 times. Then the alloy ingot is coarsely crushed and passed through a 40-mesh sieve (0.45mm mesh), and the powder obtained through the 40-mesh pass is ball-milled with gasoline as a medium, and taken out after ball-milling to 4-8 μm. The powder is dried in the air, and then shaped under a...

technical field

[0001] The invention relates to a method for preparing permanent magnet materials, in particular to a method for preparing high-performance SmCo permanent magnet materials. Background technique

[0002] Rare earth permanent magnet material is a new type of functional material developed since the 1960s. It is a permanent magnet material based on an intermetallic compound formed by rare earth metals and 3d transition metals. The remanence Br, coercive force Hc and maximum magnetic energy product (BH)max of rare earth permanent magnet materials are generally very high, making them widely used in microwave communication technology, audio-visual technology, electrical engineering, instrument technology, computer technology, automation technology, transportation It has been widely used in transportation, petrochemical engineering, magnetization technology, magnetic separation technology, bioengineering and magnetic medical and fitness equipment.

[0003] 2:17 type...

Examples

Embodiment 1

[0036] The constant magnetic field environment is stabilized at 850°C for primary aging. Its specific process steps are as follows:

[0037] Remove the surface oxides of metal materials Sm, Co, Cu, Fe, Zr and break them into lumps suitable for smelting. Then press the ingredients in Table 1.

[0038] Table 1

[0039] components

SM

co

Fe

Cu

Zr

weight percentage (%)

24.5

49.5

14

9

3

[0040] according to figure 1 The following process steps are carried out as shown: Put the prepared raw materials into a vacuum induction furnace for melting at 1325°C, turn the alloy over and melt it 4 times. Then the alloy ingot is coarsely crushed and passed through a 40-mesh sieve (0.45mm mesh), and the powder obtained through the 40-mesh pass is ball-milled with gasoline as a medium, and taken out after ball-milling to 4-8 μm. The powder is dried in the air, and then shaped under a vertical magnetic field greater t...

Embodiment 2

[0044] During the secondary aging at 450°C, the constant magnetic field environment was stabilized. Its specific process steps are as follows:

[0045] Remove the surface oxides of metal materials Sm, Co, Cu, Fe, Zr and break them into lumps suitable for smelting. Then press the ingredients in Table 2.

[0046] Table 2

[0047] components

SM

co

Fe

Cu

Zr

weight percentage (%)

23.5

48.5

16

10

2

[0048] according to figure 2 The following process steps are carried out as shown: put the prepared raw materials into a vacuum induction furnace for melting at 1320°C, and turn the alloy over for 5 times of melting. Then the alloy ingot is coarsely crushed and passed through a 40-mesh sieve (0.45mm mesh), and the powder obtained through the 40-mesh pass is ball-milled with gasoline as a medium, and taken out after ball-milling to 4-8 μm. The powder is dried in the air, and then shaped under a vertical magn...

Embodiment 3

[0052] The constant magnetic field environment was added to both the primary aging at 850°C and the secondary aging at 450°C. Its specific process steps are as follows:

[0053] Remove the surface oxides of metal materials Sm, Co, Cu, Fe, Zr and break them into lumps suitable for smelting. Then press the ingredients in Table 3.

[0054] table 3

[0055] components

SM

co

Fe

Cu

Zr

weight percentage (%)

25.5

47.5

14

10

3

[0056] according to image 3 The following process steps are carried out as shown: Put the prepared raw materials into a vacuum induction furnace for melting at 1330°C, and turn the alloy over for 3 times. Then the alloy ingot is coarsely crushed and passed through a 40-mesh sieve (0.45mm mesh), and the powder obtained through the 40-mesh pass is ball-milled with gasoline as a medium, and taken out after ball-milling to 4-8 μm. The powder is dried in the air, and then shaped under a...

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