Copper-tin alloys having improved wear properties

Details Copper-tin alloys having improved wear properties Copper-tin alloys having improved wear properties

1984-11-23

1986-05-06

O'Keefe, Veronica

Metal treatment

Compositions

Heat treating

148160, 148412, 148433, 148 631, 420470, 420472, C22C 902

Patent

active

045869677

ABSTRACT:
A copper-tin alloy having improved wear performance and a process for forming the alloy is described herein. The alloy consists essentially of about 2% to about 11%, preferably about 3.5% to about 9% tin, about 0.03% to about 0.75%, preferably about 0.08% to about 0.5% phosphorous and the balance essentially copper. The processing for improving the wear performance includes a final heat treatment at a temperature in the range of about 400.degree. C. to about 650.degree. C., preferably about 500.degree. C. to about 600.degree. C. in an atmosphere having a dew point in the range of about -75.degree. C. to about +95.degree. C., preferably -57.degree. C. to +21.degree. C. and an oxygen level in the range of about 0.001 ppm to about 225 ppm.

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patent: 3801380 (1974-04-01), Ebner
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patent: 3841921 (1974-10-01), Shapiro et al.
patent: 4443274 (1984-04-01), Brock et al.
patent: 4478651 (1984-10-01), Brock et al.
Metals Abstracts, "On the Heat Diffusion Treatment of a Cu-Sn Coated with Sn Plating", Abstr. No. 56-0512, May 1982.
Copper Development Association, Inc. Standards Handbook, "Wrought Copper and Copper Alloy Mill Products, Part 2-Alloy Data", 1973, pp. 141 and 142.

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