Method for producing semi-finished products from a nickel-based alloy

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United States of America Patent

PATENT NO 11441217
APP PUB NO 20200325567A1
SERIAL NO

16761609

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A method produces semi-finished products from a nickel-based alloy having the composition (in wt. %): Ni>50-<55%, Cr>17-<21%, Nb>4.8-<5.2%, Mo>2.8-<3.3%, Ti>0.8-<1.15%, Al>0.4-<0.6%, C maximum 0.045%, Co maximum 1.0%, Mn maximum 0.35%, Si maximum 0.35%, S maximum 0.01%, Cu maximum 0.3%, the remainder iron and unavoidable impurities. B 0.0001-0.01%, P 0.0001-0.02% are added. In the method: the alloy is melted, or remelted, to produce preliminary products that then undergo a hot-forming process and subsequently undergo a multi-stage annealing and aging treatment, a solution heat treatment being carried out between 1000 and 1100° C. for 1-3 hours, then cooled in air, water or oil, and made to undergo a precipitation hardening process between 650° C.-<770° C. for 5-9 hours, then cooled to room temperature, the intermediate products undergoing, if necessary, at least one further heating process.

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VDM METALS INTERNATIONAL GMBH58791 WERDOHL

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Aghajani, Ali Bochum, DE 1 0
Kloewer, Jutta Duesseldorf, DE 12 41
Kraemer, geb Rosenberg Julia Recklinghausen, DE 1 0

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