发明授权
- 专利标题： Valves having high wear-resistance and high corrosion-resistance
- 专利标题（中）： 具有高耐磨性和高耐腐蚀性的阀门
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申请号： US13075228申请日： 2011-03-30
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公开(公告)号： US08888069B2公开(公告)日： 2014-11-18
- 发明人: Yusaku Maruno , Seunghwan Park , Yoshihisa Kiyotoki , Shin Kumagai
- 申请人： Yusaku Maruno , Seunghwan Park , Yoshihisa Kiyotoki , Shin Kumagai
- 申请人地址： JP Ibaraki
- 专利权人： Hitachi-GE Nuclear Energy, Ltd.
- 当前专利权人： Hitachi-GE Nuclear Energy, Ltd.
- 当前专利权人地址： JP Ibaraki
- 代理机构： Antonelli, Terry, Stout & Kraus, LLP.
- 优先权： JP2010-084783 20100401
- 主分类号： F16K25/00
- IPC分类号： F16K25/00 ; B21K1/24 ; F16K15/03 ; B23K20/12 ; G21D1/02 ; F16K3/12 ; C22F1/10
摘要：
The invention provides a valve which suppresses a continuous corrosion of a chemical compound phase such as an eutectic carbide or the like in a valve seat, and improves a corrosion resistance, an impact resistance and an erosion resistance of the valve seat. The invention disperses a chemical compound phase such as the eutectic carbide or the like crystallizing in a dendrite gap as a granular shape or a blocky shape which is equal to or less than about 100 μm, by moving a tool rotating in a crimped state by a load application to a vertical direction to a surface of the valve seat so as to carry out a friction stir processing, and forming a weld metallographic structure of a surface layer portion of the valve seat as a cubic.
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