Patent ID: 7250123
Filing Date: 2007-07-31
Classification: B22F,B29C,B32B,C04B,C22C,Y10T

Abstract:
1. A method of manufacturing a composite construction comprising the steps of: (a) forming a core material molding by mixing a mixture of a metal powder that is a metal composition constituting a first hard particle composed of at least one of carbides, nitrides and carbonitrides of metals of Groups (b) forming a composite molding by forming a shell layer molding having a different composition from said molding obtained in the step (a), and disposing said shell layer molding so as to coat the outer periphery of said core material molding obtained in the step (a); and (c) sintering said composite molding such that said metal powder of said metal composition constituting said first hard particle or said first ceramic particle is made into ceramic and its volume is expanded, wherein the ratio of the residual free carbon amount C