Metal treatment – Stock – Copper base
Patent
1993-11-22
1995-04-25
Roy, Upendra
Metal treatment
Stock
Copper base
420477, 420478, 420491, C22C 900
Patent
active
054095522
ABSTRACT:
Machinable alpha beta brass having a reduced lead concentration is claimed. The alloy contains bismuth to improve machinability. Either a portion of the zinc is replaced with aluminum, silicon or tin, or a portion of the copper is replaced with iron, nickel or manganese.
REFERENCES:
patent: 1959509 (1934-05-01), Tour
patent: 2246328 (1941-06-01), Smith
patent: 2975255 (1961-03-01), Lafferty
patent: 3234014 (1966-02-01), McLain et al.
patent: 3246979 (1966-04-01), Lafferty et al.
patent: 3712837 (1973-01-01), Shapiro et al.
patent: 3772092 (1973-11-01), Shapiro et al.
patent: 3805000 (1974-04-01), Roy
patent: 3824135 (1974-07-01), Pryor et al.
patent: 3972712 (1976-08-01), Renschen
patent: 3982933 (1976-09-01), Rudolph
patent: 3985589 (1976-10-01), Shapiro et al.
patent: 4049434 (1977-09-01), Sloboda et al.
patent: 4101317 (1978-07-01), Okano
patent: 4133474 (1978-09-01), Okano
patent: 4180398 (1979-12-01), Parikh
patent: 4226621 (1980-10-01), Ruchel
patent: 4551395 (1985-11-01), Lloyd
patent: 4786469 (1988-11-01), Webber et al.
patent: 4865805 (1989-09-01), Holowaty
patent: 4879094 (1989-11-01), Rushton
patent: 5137685 (1992-08-01), McDevitt et al.
patent: 5164157 (1992-11-01), Clark et al.
patent: 5167726 (1992-12-01), LoIacono et al.
Angino et al, Environ. Science & Technology, 11 (Jul. 1977) 661-65.
Subramanian et al, Jour. Environ. Health, 54, (Sep.-Oct. 1991) 29-32.
Subramanian et al, Jour. Environ. Science. Health A26(6), [1991], 911-929.
Heusler, O., Z. Metallkde, 85 (Jan. 1994) 47.
Flemings, Merton C. "Solidification Processing" published by McGraw-Hill, Inc. 1974 at pp. 252-258.
Plewes, John T. et al, entitled "Free-Cutting Copper Alloys Contain No Lead" appearing in Advanced Materials and Processes, Oct. 1991 at pp. 23-27.
Blazy, Clement, entitled "Brittleness in Copper" appearing in the Journal of the Institute of Metals, at vol. XLVI 193, at pp. 353-383.
Eborall, entitled "Some Observations of the Mode of Occurrence of Selenium, Tellurium and Bismuth in Copper" appearing in The Journal of the Institute of Metals at vol. LXX, 1944 at pp. 4355-4446.
Voce et al, entitled "The Mechanism of the Embrittlement of Deoxidized Copper by Bismuth" appearing in The Journal of the Institute of Metals, at vol. LXXIII. 1947 at pp. 323-376.
Schofield et al, entitled "The Microstructure of Wrought Non-Arsenical Phosphorous-Deoxidized Copper Containing Small Quantities of Bismuth" appearing in The Journal of the Institute of Metals, at vol. LXXIII 1947 at pp. 377-384.
Samuels, entitled "The Metallography of Copper Containing Small Amounts of Bismuth" appearing in The Journal of the Institute of Metals at vol. LXXVII 1949-1950 at pp. 91-101.
Smith, entitled "Grains, Phases and Interfaces: An Interpretation of Microstructure" appearing in Transactions of A.I.M.E. (1984) at pp. 15-51.
Price et al, entitled "Bismuth--Its Effect on the Hot-Working and Cold-Working Properties of Alpha and Alpha-Beta Brasses" appearing in Transactions of A.I.M.E. (1942) at pp. 136-143.
Bishop, "Lead-Free Copper Alloy for Plumbing Developed by AT&T's Bell Laboratories" appearing in The Wall Street Journal, May 15, 1991.
Feder, entitled "A New Form of Brass to Cut Lead in Drinking Water" appearing in The New York Times, May 15, 1991 at p. D7.
Ova et al, Rept. Casting Res. Lab. Waseda University, No. 30, 1979 at p. 93.
Chemical Abstracts 91: 95312v (vol. 91) 1979 at p. 95317.
Chemical Abstracts 106: 37311c (vol. 106) 1987 at p. 270.
U.S. Senate Bill 2637 (101st Congress, 2D Session) 1990 at p. 36 entitled "Title IV--Lead Exposure Reduction".
Gordon et al, Science, vol 223 entitled "Bismuth Bronze from Machu Picchu, Peru" (10 Feb. 1984) at p. 585.
Chang et al "Phase Diagrams and Thermodynamic Properties of Ternary Copper Metal Systems" appearing in INCRA Monograph VI--The Metallurgy of Copper, Feb. 15, 1979 at pp. 253-263 and 669-683.
"1845 Lead Alert" appearing in Washington Home/Feb. 25, 1993.
The Journal of the Institute of Metals, vol. XCVIII. (1970) vol. 98 "A Preliminary Assessment of the Value of Minor Alloy Additions in Counteracting the Harmful Effect of Impurities on the Hot Workability of some Copper Alloys" by R. J. Jackson; D. A. Edge & D. C. Moore at pp. 193-198.
The Journal of the Institute of Metals, Jan. 1963. Vol. 91. "The Embrittlement of Alpha-Brasses by Liquid Metals" by Waterhouse & Grubb at pp. 216-219.
"Distribution of Lead and Bismuth in the Structure of Cast Copper and Copper Alloys" Pikunov; Petukhova & Getman (Moscow Institute of Steel and Alloys--Department of the Technology of Casting Processes). at pp. 155-159.
Engineering (Feb. 28, 1913) "Influence of Impurities on Muntz Metal" at pp. 282-285.
The Journal of the Institute of Metals (vol. VIII) No. 2 (1912) "The Effect of Other Metlas on the Structure of the B Constituent in Copper-Zinc Alloys" by Carpenter; at pp. 59-85.
"Quaternary Diffusion in the Cu-Ni-Zn-Mn System at 775.degree. C." by Kansky and Dayananda appearing in Metallurgical Transactions. vol. 16A, Jun. 1985 at pp. 1123-1131.
W. Koester et al. Article appearing in Zeitschrift der Metallkde, vol. 48, Nov. 1957 at pp. 595-600.
Zeiger, Article appearing in Zeitschrift der Metallkde, vol. 54, H.3, Mar. 1963 at pp. 179-181.
Dahl et al, Article appearing in Zeitschrift de Metallkde, vol. 47, Heft 6 Jun. 1956 at pp. 370-378.
Davies, Copper Development Association Literature Review, Bismuth in Copper and Copper Base Alloys (Aug. 1993), at pp. 1-52.
Consumer Reports, "Is There Lead in Your Water?", Feb. 1993, pp. 73-78.
Breedis John F.
Caron Ronald N.
Crane Jacob
Mandigo Frank N.
McDevitt David D.
Olin Corporation
Rosenblatt Gregory S.
Roy Upendra
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