Invention Grant
- Patent Title: Rolling member and producing method thereof
- Patent Title (中): 滚动构件及其制造方法
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Application No.: US12003482Application Date: 2007-12-26
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Publication No.: US07641747B2Publication Date: 2010-01-05
- Inventor: Takemori Takayama
- Applicant: Takemori Takayama
- Applicant Address: JP Tokyo
- Assignee: Komatsu Ltd.
- Current Assignee: Komatsu Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2004-153132 20040524; JP2005-131605 20050428
- Main IPC: C21D1/10
- IPC: C21D1/10

Abstract:
A rolling member excellent in pitting strength, spalling strength and bending strength of dedendum has a first quench hardened layer 1 which is formed on a surface layer of the rolling member and has a parent phase taking the form of martensite phase which forms a solid solution with carbon of 0.35 to 0.8 wt %, and a second quench hardened layer 2 which is formed at a deeper layer under the first quench hardened layer and has a parent phase containing at least either one of martensite phase or bainite phase which forms a solid solution with carbon of 0.07 to 0.3 wt % and contains cementite dispersed therein in a content of 2 to 20% by volume.
Public/Granted literature
- US20080149229A1 Rolling member and producing method thereof Public/Granted day:2008-06-26
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