Wear-resistant copper alloys and synchronizer rings for automobiles comprising the same
AssigneeChuetsu Metal Works Co., Ltd.
InventorsKunio Nakashima, Masao Hosoda, Kazuyuki Inagaki
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Abstract
A wear-resistant copper alloy which consists essentially of 56 to 65 wt. % of Cu, 28 to 32 wt. % of Zn, 3.5 to 5.5 wt. % of Al, 0.5 to 2.0 wt. % of Fe, 1.0 to 3.0 wt. % of Ni, 0.1 to 1.0 wt. % of Nb, and 0.4 to 1.5 wt. % of Ti, provided that Ti+Nb is equal to or greater than 0.7 wt. %. The alloy includes two discrete intermetallic compounds comprising Ti-Ni-Fe-Al and Nb-Fe-Al uniformly dispersed in a microstructure preferably including at least 50 volume % beta phase and limited alpha and gamma phases. A synchronizer ring made of the copper alloy is also provided.
Claims8
A wear-resistant copper alloy consisting essentially of 56 to 65 wt. % of Cu, 28 to 32 wt. % of Zn, 3.5 to 5.5 wt. % of Al, 0.5 to 2.0 wt. % of Fe, 1.0 to 3.0 wt. % of Ni, 0.1 to 1.0 wt. % of Nb, and 0.4 to 1.5 wt. % of Ti wherein Ti+Nb is equal to or greater than 0.7 wt. %, and wherein said alloy includes two discrete intermetallic compounds dispersed as precipitates in the microstructure, a first of said compounds comprising Ti-Ni-Fe-Al and a second of said compounds comprising Nb-Fe-Al.
Dependencies are inferred from the claim text.