Machinable lead-free wrought copper-containing alloys

Details Machinable lead-free wrought copper-containing alloys Machinable lead-free wrought copper-containing alloys

1990-05-15

1992-12-01

Willis, Jr., Prince

Metal treatment

Stock

Copper base

148684, 148434, 420472, 420499, 72256, C22C 900

Patent

active

051677261

ABSTRACT:
Lead inclusion in copper-containing wrought alloys is coming into disfavor due to health and environmental considerations. Machinability, as well as retention of workability properties, associated with lead inclusion are assured by bismuth together with a modifying element, phosphorous, indium or tin, with such modifying element minimizes the workability-precluding embrittlement otherwise associated with bismuth. Fabrication of product dependent upon properties of the large variety of lead-containing alloys is so permitted by use of lead-free material.

REFERENCES:
patent: 2804408 (1957-08-01), Gregory
patent: 3450573 (1969-06-01), Knapton et al.
patent: 4511410 (1985-04-01), Shapiro et al.
"Bureau of Mines Circular 9033", p. 6 (1985).
D. W. Davis, "Metals Technology", pp. 272-284 (1976).
"American Society for Metals Handbook on Machining", vol. 16, p. 806 (1989).
R. G. Lee, "Journal American Water Works Assoc.", p. 51 (Jul. 1989).
A. Butts, "Copper", p. 704 (1954).
"ASM Metals Handbook", pp. 907, 916 (1948).
Metals Handbook, 9th ed., vol. 2, p. 241, "Mechanical Working of Copper", 1981.
Price, "Bismuth-its effect . . . cold-working . . . Brasses", Meeting of A.I.M.E., Feb. 1942, pp. 136-143.
Voce, "Embrittlement of Deoxidized Copper by Bismuth", Journal of the Institute of Metals, London, 1947, pp. 323, 351.
Metals Handbook, 8th Edition, Published by American Society for Metals, vol. 1, pp. 1010-1011.

Affiliated with

Also associated with

Rating

Machinable lead-free wrought copper-containing alloys does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Machinable lead-free wrought copper-containing alloys, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Machinable lead-free wrought copper-containing alloys will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-501287