ANISOTROPIC MAGNET,申请号JP19850111036-传众专利搜索

ANISOTROPIC MAGNET

申请公布号：JPS61268006(A)

申请号：JP19850111036

申请日期：1985.05.23

申请公布日期：1986.11.27

申请人：

TDK CORP

发明人：YAMAGUCHI NORISHIGE;KAWAMOTO OSAMU

分类号：C22C38/00;H01F1/053;H01F1/057

主分类号：C22C38/00

摘要：PURPOSE:To prevent the increase of a degree that rare earth elements are oxidized even when the size of material powder is too small by giving an alloy magnet using rare earths, iron and boron as basic ingredients magnetic anisotropy by hot plastic working. CONSTITUTION:A magnet consists of 18-63% rare earths R, 0.2-6% B and Fe as the remainder at wt%. A metal, an alloy and a compound a raw materials are mixed, and heated and melted by a high-frequency melting furnace or an electric furnace or the like. A molten metal is ejected to a cooling roll from a nozzle in an inert gas atmosphere, and quenched at high speed, and a ribbon in thickness of approximately several dozen mum is prepared, and pulverized to grain size of approximately several mum - several dozen mum in the insert gas atmosphere. Powder is baked at 700-1,100 deg.C in an insert gas or vacuum atmosphere, and sintered bodies are worked plastically under the state in which they are heated at 750-1,000 deg.C in the insert gas or vacuum atmosphere, thus acquiring a magnet in which crystallographic axes are aligned in the C axis direction.