Patent ID: 6274082
Filing Date: 2001-08-14
Classification: B22F

Abstract:
A process for producing a shaped article comprising:preparing a first powder having high strength and rigidity after completion of forming, and a second powder having abrasion resistance and surface hardness after completion of forming;compacting those powders to provide a forming material comprising a base part comprising the first powder and a supplemental part comprising the second powder; andforming the forming material into a shaped article by plastic processing in which the base part and the supplemental part have different characteristics, wherein the first powder consists of at least one rapidly-solidified alloy powder consisting of a composition represented by any one of the following formulae (I) to (IV):Al.sub.a M1.sub.b X.sub.e, (I)Al.sub.a M1.sub.(b-c) M2.sub.c X.sub.e, (II)Al.sub.a M1.sub.(b-d) M3.sub.d X.sub.e, (III)andAl.sub.a M1.sub.(b-c-d) M2.sub.c M3.sub.d X.sub.e (IV)wherein:M1: at least one element selected from the group consisting of Mn, Fe, Co, Ni and Mo;M2: at least one element selected from the group consisting of V, Cr and W;M3: at least one element selected from the group consisting of Li, Ca, Mg, Si, Cu and Zn;X: at least one element selected from the group consisting of Nb, Hf, Ta, Y, Zr, Ti, Ag, rare earth elements and misch metal Mm which a mixture of rare earth elements; anda, b, c, d and e are, in atomic %, 75.ltoreq.a.ltoreq.97, 0.5.ltoreq.b.ltoreq.15, 0.1.ltoreq.c.ltoreq.5, 0.5.ltoreq.d.ltoreq.5, and 0.5.ltoreq.e.ltoreq.10.