Abstract
In Japan many car makers are now developing new engines offering high performance and good fuel economy. Sintered products for use in such engines must have higher performance and smaller size than that of the present components, coupled with high strength, high toughness and good fatigue properties. The maximum tensile strength of sintered compacts is about 1300 MPa and to obtain a greater strength it is necessary to add alloying elements, raise the sintered density and heat-treat the parts. Simultaneously to obtain high toughness adequate chemical composites must be selected and the microstructure of sintered compacts controlled. Yasuaki Morioka describes the characteristics of a new alloyed steel powder ‘KIP Sigmaloy 2010’ developed by Kawasaki Steel for ultra high strength PM parts, and the features of sintered compacts made from this powder.
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