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ECONOMICS AND BENEFITS OF HIGH TEMPERATURE SINTERING OF HIGH PERFORMANCE ALLOYS

Today’s global economy has produced an extremely competitive marketplace. Design engineers constantly compare the economics and benefits of powder metallurgy (P/M) with those of stamping, casting and wrought machining. While parts manufacturers have traditionally exploited the near net shape cost savings of conventional P/M compositions, many have turned to higher performance alloys and elevated temperature sintering in an effort to optimize the metallurgical and mechanical properties of their products. Powder producers and furnace manufacturers have continued to support these endeavors through new product and process development. This study will examine the metallurgical and mechanical enhancements achieved through the combination of high performance alloy systems and high temperature sintering. In addition, it will show how these benefits can be exploited to produce superior parts economically. High performance silicon-containing P/M steels sintered at 1150 to 1343 o C (2100 to 2450 o F) will be used to explore these property enhancements. These silicon-containing P/M steels yield excellent properties when sintered above 1260 °C (2300 °F) and are capable of attaining high apparent hardnesses .