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1. 发明授权

EP0334478B1 Die-upset manufacture to produce high volume fractions of RE-Fe-B type magnetically-aligned material 失效
$Die-upset manufacture to produce high volume fractions of RE-Fe-B type magnetically-aligned material$
标题翻译：级分的制备用来自RE-Fe-B系由压缩高容量磁性排列的材料制成。
公开(公告)号：EP0334478B1
公开(公告)日：1994-04-27
申请号：EP89301499.3
申请日：1989-02-16
申请人： GENERAL MOTORS CORPORATION
发明人： Brewer, Earl G , Lee, Robert W.
IPC分类号： H01F41/02 , H01F1/08
CPC分类号： H01F1/08 , H01F1/0576

2. 发明公开

EP0334478A3 Die-upset manufacture to produce high volume fractions of RE-Fe-B type magnetically-aligned material 失效
$Die-upset manufacture to produce high volume fractions of RE-Fe-B type magnetically-aligned material$
标题翻译：用于生产RE-B型磁性材料的高容积的DIE-UPS制造
公开(公告)号：EP0334478A3
公开(公告)日：1990-12-19
申请号：EP89301499.3
申请日：1989-02-16
申请人： GENERAL MOTORS CORPORATION
发明人： Brewer, Earl G , Lee, Robert W.
IPC分类号： H01F41/02 , H01F1/08
CPC分类号： H01F1/08 , H01F1/0576
摘要： A method of increasing the volume fraction of magnetically-aligned material in rare-earth (RE), iron, boron type anisotropic permanently magnetic material includes forming an adaptively-shaped, fully-dense, substantially magnetically-isotropic pre-form (64) from relatively coarse powder particles of melt-spun alloy containing a very fine-grain RE₂Fe₁₄B phase. The pre-form (64) is heated and die-upset to provide uniformity of strain in the pre-form (64) as it is conformed to the die walls (82), thereby causing an increased percentage of the crystallites in the pre-form (64) to be oriented along a crystallographically-preferred magnetic axis which increases the energy product of a resultant magnet formed therefrom.

3. 发明公开

EP0334478A2 Die-upset manufacture to produce high volume fractions of RE-Fe-B type magnetically-aligned material 失效
$Die-upset manufacture to produce high volume fractions of RE-Fe-B type magnetically-aligned material$
标题翻译： Herstellung von Fraktionen mit hohem Volumen a magnetisch ausgerichtetem材料呕吐RE-Fe-B-Typ durch Stauchung。
公开(公告)号：EP0334478A2
公开(公告)日：1989-09-27
申请号：EP89301499.3
申请日：1989-02-16
申请人： GENERAL MOTORS CORPORATION
发明人： Brewer, Earl G , Lee, Robert W.
IPC分类号： H01F41/02 , H01F1/08
CPC分类号： H01F1/08 , H01F1/0576
摘要： A method of increasing the volume fraction of magnetically-aligned material in rare-earth (RE), iron, boron type anisotropic permanently magnetic material includes forming an adaptively-shaped, fully-dense, substantially magnetically-isotropic pre-form (64) from relatively coarse powder particles of melt-spun alloy containing a very fine-grain RE₂Fe₁₄B phase. The pre-form (64) is heated and die-upset to provide uniformity of strain in the pre-form (64) as it is conformed to the die walls (82), thereby causing an increased percentage of the crystallites in the pre-form (64) to be oriented along a crystallographically-preferred magnetic axis which increases the energy product of a resultant magnet formed therefrom.
摘要翻译：一种增加稀土（RE），铁，硼型各向异性永久磁性材料中磁取向材料的体积分数的方法包括形成自适应形状，完全致密的基本上磁性各向同性的预成型件（64），含有非常细晶粒的RE2Fe14B相的熔纺合金的相对粗的粉末颗粒。预成型件（64）被加热和挤压，以在预制件（64）中符合模具壁（82）时提供均匀的应变，从而导致预成型件（64）中的微晶的百分比增加，形式（64）沿着晶体学上优选的磁轴定向，这增加了由其形成的所得磁体的能量乘积。

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