发明名称 |
Alloy ingot for permanent magnet, anisotropic powders for permanent magnet, method for producing same and permanent magnet. |
摘要 |
<p>An alloy ingot for permanent magnet consists essentially of rare earth metal and iron and optionally boron. The two-component alloy ingot contains 90 vol% or more of crystals having a crystal grain size along a short axis of 0.1 to 100 mu m and that along a long axis of 0.1 to 100 mu m. The three-component alloy ingot contains 90 vol% or more of crystals having a crystal grain size along a short axis of 0.1 to 50 mu m and that along a long axis of 0.1 to 100 mu m. The alloy ingot is produced by solidifying the molten alloy uniformly at a cooling rate of 10 to 1000 DEG C/sec. at a sub-cooling degree of 10 to 500 DEG C. A permanent magnet and anisotropic powders are produced from the alloy ingot. <IMAGE></p> |
申请公布号 |
EP0556751(A1) |
申请公布日期 |
1993.08.25 |
申请号 |
EP19930102276 |
申请日期 |
1993.02.12 |
申请人 |
SANTOKU METAL INDUSTRY CO., LTD. |
发明人 |
YAMAMOTO, KAZUHIKO;MIYAKE, YUICHI;OKADA, CHIKARA |
分类号 |
B22F9/02;C22C1/03;C22C1/04;H01F1/055;H01F1/057;H01F1/058;H01F1/059 |
主分类号 |
B22F9/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|