发明名称 |
Rare earth-cobalt system permanent magnetic alloys and method of preparing same |
摘要 |
Permanent magnetic alloys comprising 11.5-12.5% rare earth components of which 6.3-12% is samarium and 0.5-6.2% is yttrium; 0.2-2.5% hafnium, 19.5-26.5% iron, 7-10.5% copper, and 52-70.7% cobalt, the ranges of the components being in atomic ratios. The alloys are prepared by obtaining 1-50 mu m. powders of the components, compacting the powder after magnetic field orientation sintering the compacted powders at 1160 DEG -1220 DEG for 1-10 hours, cooling the sintered body at a rate of at least 1 DEG C./second until the temperature is about 900 DEG C., and then annealing the body at 750 DEG -900 DEG C.
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申请公布号 |
US4221613(A) |
申请公布日期 |
1980.09.09 |
申请号 |
US19790006024 |
申请日期 |
1979.01.24 |
申请人 |
NAMIKI PRECISION JEWEL CO., LTD. |
发明人 |
IMAIZUMI, NOBUO;WAKANA, KAZUO |
分类号 |
C22C1/04;C22C19/07;H01F1/053;H01F1/055;(IPC1-7):H01F1/02 |
主分类号 |
C22C1/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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