Synchronizer ring
AssigneeNippon Piston Ring Co., Ltd.
InventorsTakao Omiya, Kunihiro Iguchi, Tetsuo Masuyama
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Abstract
A synchronizer ring performing synchronous sliding operation with and separating operation from a rotating object member, is composed of an Fe sintered alloy. The Fe sintered alloy comprises carbon of from 1.2 wt. % to 2.0 wt. %, copper of from over 15.0 wt. % to 25.0 wt. %, and the balance being iron and incidental impurities. A free Cu phase is precipitated in a matrix of the synchronizer ring. The synchronizer ring has a high scuffing resistance, an excellent friction characteristic, and sufficient abrasion resisting property and strength, and moreover, provides an easy manufacture thereof by means of a size working and is stable in quality.
Claims6
A synchronizer ring capable of performing synchronous sliding operation with and separating operation from a rotating object member, said synchronizer ring composed of an Fe sintered alloy in a matrix, wherein:
- said Fe sintered alloy comprises:
- C:
- from 1.2 wt % to 2.0 wt %,
- Cu:
- from over 15.0 wt % to 25.0 wt %, and the balance being iron and incidental impurities;
- and the matrix of said synchronizer ring comprises a fine pearlite structure and a precipitated free copper phase and contains no bainite.
Dependencies are inferred from the claim text.