| 简介 |
PURPOSE : To enhance the performance of a magnet by the formation of liquid phase from R-Co intermetal compound phase of adjustment alloy powder by a method wherein the adjustment alloy powder, containing R-Co intermetal compound phase, is added and mixed to the R-Fe-B alloy powder having the R2Fe14B phase, obtained by a strip casting method, as the main phase. CONSTITUTION : The melted alloy, consisting of R (R is at least a kind of Y- containing rare-earth element) of 11 to 15 atom %, B of 4 to 12 atom % and the remaining part consisting of Fe (a part of Fe can be replaced with one or two kinds of Co and Ni) and inevitable impurities, is cast into the cast pieces having R2Fe14B phase as the main phase by a strip casting method. Also, another melted alloy, consisting of R of 45 atom % or less and remaining part consisting of Co and inevitable impurities, is cast into adjustment alloy cast pieces of R-Co intermetal compound phase. Adjustment alloy powder is blended to main phase alloy powder, a pulse magnetic field is applied, and molding and sintering operation and an aging treatment are conducted. |
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