Fabrication of Bimaterial Components by Conventional Powder Metallurgy

摘要

This paper presents the main results of a research programme devoted to the fabrication of bimaterial components by die pressing and pressureless sintering. Two materials with chemical compatibility and practical interest have been designed: a WC-Fe cemented carbide with high hardness and a Fe-W-C steel with high toughness. Two types of components have been fabricated, layered parts and tubular parts. Every step of the process (die filling, pressing, sintering) is described with emphasis on the main issues met during each one in relation with the component requirements. It is shown that the finite element simulation of pressing and sintering can help in optimising process parameters.