Sintered alloys for cam lobes and other high wear articles
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United States of America Patent
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Jan 1, 2008
Grant Date -
Apr 20, 2006
app pub date -
Oct 19, 2004
filing date -
Oct 19, 2004
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Expired
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Abstract
An iron-based sintered powder metal article for cam lobe and other high temperature, high wear applications requiring excellent net-shape stability during sintering comprises a powder metal mixture consisting essentially of, by weight, 0.5 3.0% Mo, 1 6.5% Cr, 1 5% V, and the balance Fe and impurities. These articles also have a carburized case having 0.7 1.2% C by weight. Following carburization of the case, the articles are quenched to form a martensitic matrix having a network of disbursed carbides of Cr and V. The resulting sintered articles have good mechanical strength and wear resistance and possess excellent machineability and dimensional stability.
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