As-cast, age-hardened Cu-Sn-Ni worm gearing and method of making

Details As-cast, age-hardened Cu-Sn-Ni worm gearing and method of making As-cast, age-hardened Cu-Sn-Ni worm gearing and method of making

1991-03-04

1992-03-31

Dean, R.

Metal treatment

Stock

Age or precipitation hardened or strengthened

148414, 148433, C22C 902

Patent

active

051004879

ABSTRACT:
Worm gearing having improved wear and strength properties comprises a Cu, 8.0-13.0 w/o Sn, 3.5-5.0 w/o Ni alloy aged in the as-cast condition to strengthen the dendritic microstructural constituent (e.g., alpha phase) while retaining the as-cast, relatively hard interdendritic constituents. The overall Ni concentration of the alloy does not exceed about 5 w/o and the Ni concentration across individual as-cast dendrites is decreased at the dendrite edges (grain boundaries) to hinder formation of a discontinuous, embrittling grain boundary product that is deleterious to these properties.

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