Properties of Low Alloy Steels produced by Metal Injection Molding Process

Abstract

Metal Injection Molding (MIM) process is applied to various materials such as stainless steels, low alloy steels, titanium alloys and so on. However in case of low alloy steels including low carbon contents it is difficult to control carbon contents (0.13∿0.18mass%) and attain higher density (above 95%). In this study we used fine mixed powders for attaining higher density and added carbon for controlling appropriate carbon contents. The results were as followed. (1) MIM sintered body of High density (96%) was obtained by using fine mixed powders including 0.04mass% carbon and its carbon content was 0.14mass%. (2) Maximum tensile and yield strength was obtained at 623K tempering temperature. (3) Vickers hardness curve fro surface was comparable with that of wrought material.