WINNING ENTRIES: 2006 APMI INTERNATINAL PM METALLOGRAPHY COMPETITION, PART II

摘要

Patrick King, Gerard Golin, and Steve Kolwicz Hoeganaes Corporation Clnnaminson, New Jersey and Ed Elsken, Gilbert Sehluterman and Suresh Shah Cloyes Gear & Products, Inc. Subiaco, Arkansas PM steels containing 0.8 w/o molybdenum are often used to form hybrid alloys such as Fe-0.8 w/o Mo-2.0 w/o Ni-0.6 w/o C. In the heat-treated condition, such alloys historically have provided a cost-effective method in the manufacture of high-performance components. The recent instability in molybdenum prices, however, has reduced their economic benefit and forced a search for alternative systems. This investigation provides a comparative analysis of 0.3 and 0.8 w/o molybdenum steels. An automotive crankshaft sprocket was evaluated as a prototype component in the as-sintered, induction-hardened, and quenched -and-tempered (Q&T) conditions.