专利名称：Wear-resistant sintered alloy, and its
production method
发明人：Aonuma, Koichi,Aoki, Yoshimasa,Hayashi,
Koichiro
申请号：EP97300005.2申请日：19970102公开号：EP0789088A1公开日：19970813
摘要：The invention provides a valve seat having a suitable degree of wear resistance,which can be produced without recourse to expensive elements represented by cobaltand at a cost lower than ever before. This valve seat is formed of a wear-resistant
sintered alloy having a general composition consisting essentially of, in weight ratio, 0.736to 9.65% of nickel, 0.736 to 2.895% of copper, 0.294 to 0.965% of molybdenum, 0.12 to6.25% of chromium, and 0.508 to 2.0% of carbon with the balance being iron, andinevitable impurities, and having a metallic structure in which there are dispersed (1) amartensite, (2) a bainite having a nucleus of sorbite and/or upper bainite and surroundingsaid nucleus, (3) an austenite having a high nickel concentration, and (4) a hard phasesurrounding with a ferrite having a high chromium concentration and composed mainly ofa chromium carbide.
申请人：HITACHI POWDERED METALS CO., LTD.
地址：520, Minoridai Matsudo-city Chiba prefecture JP
国籍：JP
代理机构：Caldwell, Judith Margaret
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