发明名称 |
Method of sintering and forging raw material |
摘要 |
A method of forging a raw material for sintering and forging. The method comprises the steps of: (a) compacting metallic powder containing iron as a main component and graphite to obtain a compact having a predetermined density; (b) sintering the compact at a temperature ranging from 700 to 1000 DEG C to form a sintered compact having a texture in which graphite is retained at grain boundary of metal powder; (c) compressing the sintered compact from two directions to obtain a compressed sintered compact; and (d) extruding the compressed sintered compact upon pressing the compressed sintered compact from the two directions in a manner that a pressure in one of the two directions is reduced relative to a pressure in the other of the two directions to accomplish extrusion forging. <IMAGE> |
申请公布号 |
EP1201338(A3) |
申请公布日期 |
2005.06.08 |
申请号 |
EP20010125654 |
申请日期 |
2001.10.26 |
申请人 |
HITACHI, LTD. |
发明人 |
YOSHIMURA, TAKASHI;IIJIMA, MITSUMASA;KOIZUMI, SHIN;HATAI, YASUO |
分类号 |
B21J1/02;B21J1/06;B21J5/00;B21J5/06;B22F3/17;B22F3/20;C22C33/02 |
主分类号 |
B21J1/02 |
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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