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

1988-05-25

1989-09-26

McDowell, Robert

Metal treatment

Stock

Ferrous

148328, 148332, 148333, 148411, 148412, 148413, 148414, 148419, 420 34, 420 42, 420 60, 420 90, 420 91, 420495, 420582, 420583, 420584, C22C 900, C22C 3002, C22C 3820

Patent

active

048697583

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: 2944889 (1960-07-01), Klement
patent: 3574001 (1971-04-01), Ence
patent: 4309489 (1982-01-01), Momose et al.
patent: 4318740 (1982-03-01), Koyama
patent: 4640723 (1987-02-01), Sugai et al.
patent: 4710349 (1987-12-01), Yamazaki et al.

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