Method of imparting increased dezincification resistance to bras

Details Method of imparting increased dezincification resistance to bras Method of imparting increased dezincification resistance to bras

1974-07-10

1976-06-15

Stallard, W.

Metal treatment

Compositions

Heat treating

751575, 148 115R, C22D 116

Patent

active

039635260

ABSTRACT:
A method in which to a brass containing 61-66% of copper there is added 0.02% of an alloying element such as arsenic, antimony or phosphorus and up to 4% of lead and in the case of chill casting and pressure die casting alloys 0.05-0.8% of aluminum, the remainder being zinc and usual impurities from the raw materials used, and in which the alloy after chill casting, pressure die-casting or sand casting, after extrusion or, where applicable, after hot pressing of parts cut from extruded rods, is heated to a temperature in the interval between 450 and 600.degree. Celcius for a period so selected that the .beta.-crystals are broken up, thus avoiding the occurence of a coherent structure of .beta.-crystals through the brass.

REFERENCES:
patent: 2118688 (1938-05-01), Webster
patent: 3005702 (1961-10-01), Chaudron et al.

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