Invention Grant
- Patent Title: Aluminum alloy member, aluminum alloy piston for internal combustion engine and manufacturing method thereof
- Patent Title (中): 铝合金构件，内燃机用铝合金活塞及其制造方法
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Application No.: US14021407Application Date: 2013-09-09
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Publication No.: US09010297B2Publication Date: 2015-04-21
- Inventor: Takanori Sato , Masato Sasaki , Norikazu Takahashi
- Applicant: Hitachi Automotive Systems, Ltd.
- Applicant Address: JP Hitachinaka-shi
- Assignee: Hitachi Automotive Systems, Ltd.
- Current Assignee: Hitachi Automotive Systems, Ltd.
- Current Assignee Address: JP Hitachinaka-shi
- Agency: Foley & Lardner LLP
- Priority: JP2012-203882 20120918; JP2013-160028 20130801
- Main IPC: C25D11/04
- IPC: C25D11/04 ; C25D3/02 ; C25D5/44 ; C25D11/00 ; C25D11/20 ; F02F3/00 ; C25D3/56
Abstract:
A piston for an internal combustion engine includes a piston body made of an aluminum alloy material containing silicon and having a piston ring groove formed therein and an anodic oxide film formed on the piston ring groove, wherein a metal containing nickel and zinc is deposited around silicon particles in the anodic oxide film.
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