Metal treatment – Stock – Copper base
Patent
1994-07-20
1997-06-10
Simmons, David A.
Metal treatment
Stock
Copper base
148412, 148413, 148432, 148433, 148442, 420472, 420476, 420477, 420499, 420587, 420589, C22C 904
Patent
active
056371608
ABSTRACT:
There is provided a machinable .alpha.+.beta. brass containing bismuth and phosphorous. By maintaining the phosphorous content within a critical range, the alloy exhibits good elevated temperature tensile elongation in the temperature range of 100.degree. C.-350.degree. C. without a decrease in machinability due to phosphide formation. In preferred embodiments, the alloy further contains a tin addition for enhanced corrosion resistance. The combination of tin and phosphorous provides enhanced corrosion resistance to the alloy than could be predicted from either addition alone.
REFERENCES:
patent: 1959509 (1934-05-01), Tour et al.
patent: 4180398 (1979-12-01), Parikh
patent: 4879094 (1989-11-01), Ruston
patent: 5167726 (1992-12-01), LoIacono et al.
patent: 5262124 (1993-11-01), Yamaji et al.
"Low Melting Point Inclusions and Hot Tearing in Brass Castings" by Oya et al. Report of the Casting Research Laboratory, Waseda University. No. 30 (1979), pp. 93-100.
"Free-Cutting Copper Alloys Contain No Lead" by John T. Plewes and Dominic N. LoIacono, appearing in Advanced Materials & Processes Oct. 1991 at pp. 23-27.
"Bismuth--Its Effect on the Hot-Working and Cold-working Properties of Alpha and Alpha-beta Brasses" by William B. Price and Ralph W. Bailey. Trans. (Feb. 1942) at pp. 136-143, AIME.
"Bismuth in Copper and Copper Base Alloys" by D.W. Davies. Aug. 1993 (a literature review).
Breedis John F.
Brock Andrew J.
Caron Ronald N.
Crane Jack
Fister Julius C.
Koehler Robert R.
Olin Corporation
Rosenblatt Gregory S.
Simmons David A.
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