Abstract
The metal injection molding process (MIM) is a key technology which makes it possible to form complicated 3-dimensional parts in near net shape. Cast iron which contains graphite in the microstructure has unique properties such as solid lubricity and damping capacity in addition to castability. In this study, it is intended to synthesize high functional MIM products from cast iron powder. Water-atomized cast iron powder and binder are mixed and injected to the mold. The injected body is sintered after solvent debinding. By using cast iron powder with low oxygen content and the solvent debinding method, the oxidation is minimized, the debinding time is reduced and the process can be simplified. The maximum tensile strength is comparable to that of ductile cast iron. The estimated damping capacity is as high compared with that of gray iron. The high damping capacity with high tensile strength and reasonable wear resistance are considered to be obtained by the structure mixed with fine graphite particles and pores in pearlitic matrix.
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