Copper base alloy casting, and methods for producing casting...

Metal treatment – Process of modifying or maintaining internal physical... – With casting or solidifying from melt

Reexamination Certificate

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Details

C148S554000, C148S680000, C148S681000, C148S682000, C148S686000

Reexamination Certificate

active

10637140

ABSTRACT:
In the present invention, forming is carried out by employing casting to rapidly solidify molten material comprising a copper base alloy containing 3 to 20% Ag (mass % hereinafter), 0.5 to 1.5% Cr and 0.05 to 0.5% Zr. Next, an aging treatment for precipitation is carried out at 450 to 500° C., and the formed article is obtained by precipitation strengthening. In addition, in the aforementioned copper base alloy, molten material comprising a copper base alloy containing Ag in the amount of 3 to 8.5% is solidified by casting, and the solidified article or the hot worked article thereof is subjected to an aging treatment for precipitation and a thermomechanical treatment using forging or rolling, and the casting is obtained by forming the material into a specific shape and carrying out precipitation strengthening.

REFERENCES:
patent: 9502356 (1996-06-01), None
patent: 58-141352 (1983-08-01), None
patent: 4-198460 (1992-07-01), None
patent: 4-231443 (1992-08-01), None
patent: 04221032 (1992-08-01), None
patent: 6-279894 (1994-10-01), None
patent: 0941056 (1997-02-01), None
patent: 2863627 (1998-12-01), None

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