公开(公告)号：US5437741A

公开(公告)日：1995-08-01

申请号：US238330

申请日：1994-05-05

申请人： Yukiko Ozaki ,  Michio Shimotomai ,  Yasutaka Fukuda ,  Akira Fujita ,  Yoko Kitano ,  Junichi Shimomura

发明人： Yukiko Ozaki ,  Michio Shimotomai ,  Yasutaka Fukuda ,  Akira Fujita ,  Yoko Kitano ,  Junichi Shimomura

IPC分类号： C22C1/04 ,  C22C19/07 ,  H01F1/057

CPC分类号： H01F1/0577 ,  C22C1/0441 ,  C22C19/07

摘要： A corrosion-resistant rare earth metal-transition metal-boron permanent magnet having improved corrosion resistance and excellent magnetic properties, including RE: 10-25 at % (where RE is at least one of Y, Sc and lanthanides), B: 2-20 at % and the remainder being substantially Fe, Co and Ni. In this case, the magnet has an average crystal grain size of 0.1-50 .mu.m and includes a crystal grain boundary phase of RE(Ni.sub.1-x-y Co.sub.x Fe.sub.y) compound having a thickness of not more than 10 .mu.m.

摘要翻译： 具有改善的耐腐蚀性和优异的磁性能的耐腐蚀稀土金属 - 过渡金属 - 硼永磁体，包括RE：10-25at％（其中RE是Y，Sc和镧系元素中的至少一种），B：2- 20原子％，其余基本上为Fe，Co和Ni。 在这种情况下，磁体的平均晶粒尺寸为0.1-50μm，并且包括厚度不大于10μm的RE（Ni1-x-yCoxFey）化合物的晶界相。

公开(公告)号：US06375760B2

公开(公告)日：2002-04-23

申请号：US09731532

申请日：2000-12-08

申请人： Kei-ichi Maruta ,  Michio Shimotomai ,  Yasunori Yonehana ,  Yoshio Abe ,  Tomoyuki Yokota ,  Yoshitaka Adachi ,  Norikazu Matsukura

发明人： Kei-ichi Maruta ,  Michio Shimotomai ,  Yasunori Yonehana ,  Yoshio Abe ,  Tomoyuki Yokota ,  Yoshitaka Adachi ,  Norikazu Matsukura

IPC分类号： C21D104

CPC分类号： C21D1/04 ,  C21D1/185 ,  C21D7/10 ,  C21D7/13

摘要： A structure of a two-phase steel is controlled by subjecting a steel containing C: 0.05-0.80 mass % to a strain work in a true strain quantity of not less than 0.1 at a temperature zone of &agr;-phase or &ggr;-phase and then applying a magnetic field of 0.1-20 T thereto within a temperature range forming a two-phase zone of &agr;-phase and &ggr;-phase.

摘要翻译： 通过在α相或γ相的温度区域对含有C：0.05-0.80质量％的钢进行在不小于0.1的真实应变量的应变作业中的两相钢的结构，然后 在形成α相和γ相的两相区域的温度范围内施加0.1-20T的磁场。

公开(公告)号：US5885370A

公开(公告)日：1999-03-23

申请号：US058830

申请日：1998-04-13

申请人： Michio Shimotomai ,  Akihiro Matsuzaki ,  Yasunori Yonehana

发明人： Michio Shimotomai ,  Akihiro Matsuzaki ,  Yasunori Yonehana

IPC分类号： C21D6/00 ,  C21D1/04 ,  C21D8/12 ,  C22C38/00 ,  H01F1/147 ,  H01F13/00 ,  H01F1/14 ,  C21D9/52

CPC分类号： H01F13/003 ,  C21D1/04 ,  C21D8/1261 ,  H01F1/14775

摘要： Magnetic heat treatment of steel, characterized by transforming steel containing about 0.01 to 2.0 mass % of carbon in a magnetic field having a gradient of about 0.1 T/cm or more and about 10 T/cm or less (absolute value) at the Curie point or lower, to effectively refine the microstructure by subjecting the steel to heat treatment in a strong magnetic field having a gradient, followed by advantageously improving the mechanical properties of the steel.

摘要翻译： 钢的磁热处理，其特征在于在居里点处具有约0.1T / cm以上且约10T / cm以下（绝对值）的梯度的磁场中含有约0.01〜2.0质量％的碳的钢 以下，通过使钢在具有梯度的强磁场中进行热处理，有效地提高钢的机械性能，有效地提高显微组织。

公开(公告)号：US5447578A

公开(公告)日：1995-09-05

申请号：US266791

申请日：1994-06-28

申请人： Yukiko Ozaki ,  Michio Shimotomai ,  Yasutaka Fukuda ,  Akira Fujita ,  Yoko Kitano ,  Junichi Shimomura

发明人： Yukiko Ozaki ,  Michio Shimotomai ,  Yasutaka Fukuda ,  Akira Fujita ,  Yoko Kitano ,  Junichi Shimomura

IPC分类号： C22C1/04 ,  C22C19/07 ,  H01F1/057

CPC分类号： C22C1/0441 ,  C22C19/07 ,  H01F1/0577

摘要： This invention provides permanent magnets that are excellent not only in magnetic properties but also corrosion resistance by using two magnetically useful phases, i.e., RE.sub.2 TM.sub.14 B phase having a high residual magnetic flux density and a low melting point RE-TM' phase or RE-TM'-B phase which enhances the sinterability and possesses a cleaning action against grain boundaries of the RE.sub.2 TM.sub.14 B main phase. Further the invention provides a method for forming an electrochemically noble composition as a starting material to prepare a two phase magnet.

摘要翻译： 本发明提供永磁体，它不仅通过使用两个磁性有用的相，即具有高剩余磁通密度和低熔点RE-TM'相或RE-TM'相的RE2TM14B相，而且在磁特性上也具有优异的耐腐蚀性， -B相，其增强了烧结性，并且具有对RE2TM14B主相的晶界的清洁作用。 此外，本发明提供了一种形成电化学高贵组合物作为起始材料以制备双相磁体的方法。

公开(公告)号：US5015307A

公开(公告)日：1991-05-14

申请号：US251366

申请日：1988-09-30

申请人： Michio Shimotomai ,  Yasutaka Fukuda ,  Akira Fujita

发明人： Michio Shimotomai ,  Yasutaka Fukuda ,  Akira Fujita

IPC分类号： C22C19/07 ,  C22C38/10 ,  H01F1/057

CPC分类号： C22C38/105 ,  C22C19/07 ,  H01F1/057 ,  H01F1/0577

摘要： A corrosion-resistant rare earth metal-transition metal magnet alloy having excellent coercive force, squareness, corrosion resistance and temperature characteristics is disclosed, which alloy consists of at least one of rare earth element inclusive of Y; B; occasionally at least one of Mg, Al, Si, Ca, Ti, V, Cr, Mn, Cu, Zn, Ga, Ge, Zr, Nb, Mo, In, Sn, Ta and W; and the remainder being transition metals of Fe, Co and Ni.