Iron/copper/chromium alloy material for high-strength lead frame

Details Iron/copper/chromium alloy material for high-strength lead frame Iron/copper/chromium alloy material for high-strength lead frame

1990-05-23

1992-02-04

Chaudhuri, Olik

Metal treatment

Compositions

Heat treating

148 127C, 148 127R, 148326, 148328, 148411, 148414, 148413, 420495, 420582, C22D 108

Patent

active

050857126

ABSTRACT:
An iron/copper/chromium alloy material for a high-strength lead frame or pin grid array, which comprises 20 to 90% by weight of Cu and 2.5 to 12% by weight of Cr, with the balance being mainly iron, and which has an average grain size number of at least 10 in each of the iron/chromium phase and the copper phase, is prepared by continuous casting, cold-working, and aging.

REFERENCES:
patent: 2210314 (1940-08-01), Wright
patent: 2254944 (1941-09-01), Hensel et al.
patent: 3574001 (1971-04-01), Ence
patent: 4049426 (1977-09-01), Watson et al.
patent: 4067750 (1978-01-01), Mravie et al.
patent: 4439247 (1984-03-01), Arita et al.
patent: 4640723 (1987-02-01), Sugai et al.
Chemical Abstracts, vol. 82, No. 20, 128427e (1975).
Chemical Abstracts, vol. 84, No. 14, 84:94307q (1976).

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