Metal injection moulding of mechanically alloyed materials

The chapter deals with processing metal injection molding (MIM) parts after they have been molded. Primary debinding depends on the feedstock type being used. The reason for primary debinding and the process for major feedstock types are discussed. The equipment and process for the commercially used feedstocks are described. Secondary debinding and sintering have been combined into one step from the old three-step process used in the original MIM process. Thermal debinding of the secondary binder is described and the consequences of incomplete debinding discussed. Sintering, mass transport during sintering and the practical aspects of sintering are explained. Guidelines are provided for obtaining optimum properties by MIM for most MIM materials including the effect of different atmospheres. Settering of parts with both flat surfaces and complex shapes and setter materials are described. Both continuous and batch equipment may be used.