Ti-A ▲ l ▼ intermetallic compound based alloy member and a method of manufacturing the same having excellent wear resistance

摘要

PURPOSE:To easily manufacture a heat-resistant member excellent in wear resistance by cladding the surface of a Ti-Al intermetallic compound base alloy member with Ti powder and W2C or Cr3C2 powder by welding and forming the structure of a betaphase Ti alloy contg. TiC. CONSTITUTION:At least a part of the surface of a member made of a Ti-Al or Ti3-Al intermetallic compound base alloy is clad by welding by using a cladding by welding material essentially consisting of Ti and/or Ti alloy powder and W2C and/or Cr3C2 powder with hard ceramic powder as well according to necessary. The amt. of the above W2C, Cr3C2 or the like to be blended is preferably regulated to about 3 to 70wt.% to that of the cladding material and the particle size thereof is preferably regulated to about =60 mesh. The above cladding by welding is executed by a plasma torch method or the like, and at this time, TiC having high hardness and free W and Cr as strong beta phase stabilizing elements are formed. Thus, a structure contg. TiC with ceramic particles according to necessary crystallized out and/or precipitated in the base of a beta phase Ti alloy having toughness is formed on the surface layer part of the above member. In this way, the wear resistance of the above member can be improved without impairing its characteristics of lightness in weight, high temp. strength or the like.