发明名称 |
Production method of high density iron based forged part |
摘要 |
A high density iron based forged part such as a mechanical part is produced by a method comprising the following steps in the sequence set forth: (a) preparing iron based powder mixture containing iron based metal powder and graphite powder; (b) preliminarily compacting the iron based powder mixture to form a preliminary compact; (c) sintering the preliminary compact in a non-oxidizing atmosphere whose nitrogen partial pressure is 30 kPa or less, at a temperature of 950° C. or more and of 1300° C. or less to form a forming material; and (d) forging the forming material by closed die forging or enclosed die forging to produce a high density forged part.
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申请公布号 |
US2003215349(A1) |
申请公布日期 |
2003.11.20 |
申请号 |
US20030374720 |
申请日期 |
2003.02.27 |
申请人 |
HITACHI UNISIA AUTOMOTIVE, LTD. |
发明人 |
NAKAMURA NAOMICHI;UNAMI SHIGERU;UENOSONO SATOSHI;FUJINAGA MASASHI;YOSHIMURA TAKASHI;IIJIMA MITSUMASA;KOIZUMI SHIN;AMMA HIROYUKI |
分类号 |
B22F3/10;B22F3/17;C22C33/02;C22C38/00;(IPC1-7):B22F3/12 |
主分类号 |
B22F3/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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