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Permanent magnet sintering material box and material stacking method

A permanent magnet, material box technology

Active Publication Date: 2014-09-10
SANVAC BEIJING MAGNETICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for a sintering furnace without a protective feeding device, this material box cannot be used for coding, otherwise the blank will be oxidized
At the same time, the carbon material box will react with rare earths under vacuum and high temperature conditions to form rare earth carbides, which is not conducive to the improvement of the performance of rough products.

Method used

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  • Permanent magnet sintering material box and material stacking method
  • Permanent magnet sintering material box and material stacking method
  • Permanent magnet sintering material box and material stacking method

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1: A tinplate sheet with a thickness of 0.15mm is selected to make a material box for inner layer sintering, including a box body 1 and a box cover 2, and the gap between the box body 1 and the box cover 2 is 0.08mm. The box body 3 and the box cover 4 of the outer sintered material box are made of Q235 steel. Put the box body 1 of the inner layer sintering material box into the box body 3 of the outer layer sintering material box and put it into the box body filled with protective gas N 2 In the glove box, put the pressed compact into the protective gas N 2 In the glove box, the oxygen content should not exceed 0.05ppm, and the compact size is 56*49*40mm. Put the compact into the box body 1 of the material box for inner layer sintering, fasten the box cover 2 first after the stack is full, and then fasten the box cover 4. Load the double-layer magazine full of blanks into a protective gas N 2 Store in containers. It takes 5 hours (hours) from the beginnin...

Embodiment 2

[0032] Embodiment 2: A tinplate sheet with a thickness of 0.23 mm is selected to make a material box for inner layer sintering, including a box body 1 and a box cover 2, and the gap between the box body 1 and the box cover 2 is 0.05 mm. The box body 3 and the box cover 4 of the outer sintered material box are made of Q345 steel. Put the box body 1 of the inner layer sintering material box into the box body 3 of the outer layer sintering material box and put it into the box body filled with protective gas N 2 In the glove box, put the pressed compact into the protective gas N 2 In the glove box, the oxygen content should not exceed 0.05ppm, and the compact size is 56*49*40mm. Put the compact into the box body 1 of the material box for inner layer sintering, fasten the box cover 2 first after the stack is full, and then fasten the box cover 4. Load the double-layer magazine full of blanks into a protective gas N 2 Store in containers. It takes 5 hours from the beginning of p...

Embodiment 3

[0033] Embodiment 3: A tinplate sheet with a thickness of 0.28 mm is selected to make a material box for inner layer sintering, including a box body 1 and a box cover 2, and the gap between the box body 1 and the box cover 2 is 0.1 mm. The box body 3 and the box cover 4 of the outer sintered material box are made of Q235 steel. Put the box body 1 of the inner layer sintering material box into the box body 3 of the outer layer sintering material box and put it into the box body filled with protective gas N 2 In the glove box, put the pressed compact into the protective gas N 2 In the glove box, the oxygen content should not exceed 0.05ppm, and the compact size is 56*49*40mm. Put the compact into the box body 1 of the material box for inner layer sintering, fasten the box cover 2 first after the stack is full, and then fasten the box cover 4. Load the double-layer magazine full of blanks into a protective gas N 2 Store in containers. It takes 5 hours from the beginning of pr...

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Abstract

A permanent magnet sintering material box consists of a box body and a box cover and is characterized in that the material box is made of tinplate. When the permanent magnet sintering material box is used for stacking materials, the sintering material box is used as an inner side material box, a material box which has the same shape as the inner side material box and a slightly larger size than the inner side material box is used as an outer side material box, and the inner side material box is placed in the outer side material box to form a double-layer material box for use. According to the permanent magnet sintering material box, the problem of sealing of the material box is solved, the problem of oxidation of sintered nd-fe-b pressed blanks during a storage process before entering a sintering furnace can be effectively prevented, and meanwhile, full air venting can be achieved during a high-temperature air venting phase; when the permanent magnet sintering material box is used for stacking the sintered nd-fe-b pressed blanks and performing high-temperature sintering aging, consistence of magnet performance is greatly improved, an oxygen content in a magnet is low, and an oxidation ratio is greatly reduced.

Description

technical field [0001] The invention relates to a material box for sintering permanent magnets and a material coding method, in particular to a material box for sintering sintered NdFeB magnets and a material coding method for putting blanks into the material box. Background technique [0002] The sintering process of sintered NdFeB magnets is high-temperature sintering under vacuum conditions. The material box used is usually made of carbon steel. After several times of use, it will be deformed due to high temperature, and a press is needed to shape the material box. to use. At the same time, due to the easy-to-oxidize characteristics of the NdFeB blank, if the green body after pressing is put into the material box, if the anti-oxidation protection cannot be carried out, the corners of the blank around the edge of the material box will easily oxidize, and even cause the entire Oxidation of the batch blank affects the performance and pass rate of the blank. In the mass pro...

Claims

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Application Information

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IPC IPC(8): B22F3/10H01F1/08H01F41/02
Inventor 王浩颉赵玉刚杨雁
Owner SANVAC BEIJING MAGNETICS
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