公开(公告)号：EP0719871A1

公开(公告)日：1996-07-03

申请号：EP95920245.8

申请日：1995-06-02

申请人： SUMITOMO ELECTRIC INDUSTRIES, LIMITED

发明人： WAKABAYASHI, Takayoshi Itamai Works, ,  YAMAMURA, Akihiko Itamai Works,

IPC分类号： C22C26/00 ,  C04B35/52 ,  B22F7/00

CPC分类号： B01J3/062 ,  B01J2203/062 ,  B01J2203/0655 ,  B01J2203/0685 ,  C22C26/00 ,  H01F1/0018 ,  H01F1/0306

摘要： This invention aims at providing a nonmagnetic or feeble magnetism diamond sintered body which can be used for a magnetized product and a magnetic material. This object is achieved by a nonmagnetic or feeble magnetism diamond sintered body the magnetic susceptibility of which is not more than 3 % of that of Fe, characterized in that this sintered body comprises a high-hardness sintered body containing not less than 50 vol.% of diamond of a grain size of 0.1-100 µm, a binder phase of the diamond sintered body having a metal component selected from the group comprising ferromagnetic iron family metals, such as Ni, Co and Fe and a mixture thereof, 1-50 vol.% of binder phase of not less than one kind of feeble magnetism metal component having a magnetic susceptibility of not more than 5x10 -6 (emu/g), such as Cr, V, Cu, Si, Zn, Al, No and W being solid dissolved in the previously-mentioned metal component, whereby the magnetic moment of the diamond sintered body having a binder phase the main components of which are iron family metals is reduced by not less than 80 %.

摘要翻译： 本发明的目的是提供一种可用于磁化产品和磁性材料的非磁性或微弱磁性金刚石烧结体。 该目的通过一种磁化率不超过Fe的3％的非磁性或微小磁性的金刚石烧结体来实现，其特征在于该烧结体包含含有不小于50体积％的高硬度烧结体， 的粒度为0.1-100μm的金刚石的金刚石烧结体的粘结相，所述金刚石烧结体具有选自铁磁铁族金属如Ni，Co和Fe及其混合物的金属组分和它们的混合物的1-50体积％ （Cr，V，Cu，Si，Zn，Al，No，W等）的磁化率为5×10-6（emu / g）以下的微弱磁性金属成分 固溶于前述金属成分中，由此具有主要成分为铁族金属的粘合剂相的金刚石烧结体的磁矩降低不小于80％。