RARE-EARTH ALLOY POWDER FOR BONDED MAGNET, AND BONDED MAGNET,申请号JP19900041186-传众专利搜索

RARE-EARTH ALLOY POWDER FOR BONDED MAGNET, AND BONDED MAGNET

申请公布号：JPH03245503(A)

申请号：JP19900041186

申请日期：1990.02.23

申请公布日期：1991.11.01

申请人：

SUMITOMO METAL MINING CO LTD

发明人：KANEKO ISAO;ISHIKAWA TAKASHI

分类号：B22F1/00;C22C19/07;H01F1/08

主分类号：B22F1/00

摘要：PURPOSE:To obtain the title rare-earth alloy powder having a specific composition and a microcrystal texture with mean particle diameters of a specific value or smaller, and having excellent magnetic characteristics and corrosion-resisting properties by a method wherein the rare-earth alloy powder is composed of Nd and/or Pr represented by R; at least one of Ti, Zr, Rf, V, Cr, Mo, Mn and the like represented by M, and Fe, and the remaining part consisting of Co and inevitable impurities. CONSTITUTION:The title alloy powder is composed of R which represents at least one of Nd and Pr, M which represents at least one of Ti, Zr, Hf, V, Cr, Mo, Mn, Cu Al and Si, and Fe, and the remaining part consisting of Co and inevitable impurities, having the composition indicated by the formula RxMy (Co1-xFex)100-x-y, and also having the microscopic crystal texture of mean particle diameter of 3000Angstrom or smaller. The composition of the above-mentioned alloy powder is 5<=x<=15, 2<=y<=20 and 0<=z<=0.35. A bonded magnet is formed by mixing the rare-earth alloy powder, which is manufactured as above-mentioned, with a binder and the mixture is formed into the desired shape using a press-molding method, an injection molding method and the like. As a result, a bonded magnet having excellent magnetic characteristics and corrosion-resisting property can be formed.