发明授权
- 专利标题: Valve guide for internal combustion engine made from iron base sintered alloy
- 专利标题(中): 由铁基烧结合金制成的内燃机导向阀
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申请号: US10499026申请日: 2002-12-27
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公开(公告)号: US07040601B2公开(公告)日: 2006-05-09
- 发明人: Katsunao Chikahata , Koichiro Hayashi , Katsuaki Sato
- 申请人: Katsunao Chikahata , Koichiro Hayashi , Katsuaki Sato
- 申请人地址: JP Chiba JP Tokyo
- 专利权人: Hitachi Powdered Metals Co., Ltd.,Honda Giken Kogyo Kabushiki Kaisha
- 当前专利权人: Hitachi Powdered Metals Co., Ltd.,Honda Giken Kogyo Kabushiki Kaisha
- 当前专利权人地址: JP Chiba JP Tokyo
- 代理机构: Oliff & Berridge, PLC
- 优先权: JP2002-004915 20020111
- 国际申请: PCT/JP02/13747 WO 20021227
- 国际公布: WO03/060173 WO 20030724
- 主分类号: F16K1/00
- IPC分类号: F16K1/00
摘要:
Valve guides made of ferrous sintered alloy for internal combustion engines have improved durability of the valve stem without soft nitriding process. The valve guides include Cu: 8 to 20 mass %, C: 0.8 to 1.5 mass %, and at least one of MnS, WS2, and MoS2: 0.5 to 2 mass % and the balance of Fe, the valve guides have many pores, have a metal structure in which the copper phase dispersed in an iron pearlite matrix exists, and have a structure in which metal sulfides are dispersed between particles between the matrix and the copper phase.
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