Lead-free free-cutting copper-antimony alloys

Details Lead-free free-cutting copper-antimony alloys Lead-free free-cutting copper-antimony alloys

2004-06-11

2009-12-08

Ip, Sikyin (Department: 1793)

Metal treatment

Stock

Copper base

C148S554000, C148S680000, C148S681000, C148S682000, C148S683000, C420S477000, C420S478000, C420S479000, C420S480000, C420S481000, C420S482000, C420S483000, C420S484000

Reexamination Certificate

active

07628872

ABSTRACT:
A lead-free free-cutting copper-antimony alloy comprises in percentage by weight: 55 to 65% Cu, 0.3 to 2.0% Sb, 0.2 to 1.0% Mn, at least two elements selected from the group of Ti, Ni, B, Fe, Se, Mg, Si, Sn, P and rare-earth metal in amount of 0.1-1.0%, as well as balance Zn and unavoidable impurities. The brass alloys according to the present invention possess superior cutting property, weldability, corrosion resistance, dezincification resistance and high-temperature-oxidation resistance, and are suitable for use in drinking-water installations, domestic appliances, toy for children, fastener, etc. The process for producing such alloys is also proposed.

REFERENCES:
patent: 5487867 (1996-01-01), Singh
patent: 5630984 (1997-05-01), Waschke et al.
patent: 5653827 (1997-08-01), Kramer et al.
patent: 0711843 (1996-05-01), None
patent: 56-29643 (1981-03-01), None
patent: 60086253 (1985-05-01), None
patent: 63-130738 (1988-06-01), None

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