Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Reexamination Certificate
2005-09-06
2005-09-06
Sheehan, John P. (Department: 1742)
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
C148S669000, C148S670000, C148S671000, C148S609000, C148S621000, C148S624000, C148S648000
Reexamination Certificate
active
06939419
ABSTRACT:
The invention relates to plastic metal working, more specifically to methods for producing parts of the disk- or shell-type having conical, hemispherical, and also combined parts, such as disk-and-shaft ones. The invention is instrumental in producing large axially symmetric parts from hard-to-work multiphase alloys. The method consists in that the billet is heated in a temperature range above 0.4 m.p. but below the temperature at which a total content of precipitates or an allotropic modification of the matrix of a multiphase alloy is not below 7%. Then the preheated billet is rolled, while controlling its temperature and the tool load, as well as the rolling speed. Once rolled the billet is heat-treated at a temperature depending on the microstructure of the billet material resulting from rolling. Prerolling preparing of a specified microstructure of the billet material is also described.
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Translation of USSR Inventor's Certificate 470346, May 15, 1975.
Kaibyshev Oscar Akramovich
Utyashev Farid Zainullaevich
Valitov Vener Anvarovich
Cantor & Colburn LLP
Chaskin Jay L.
General Electric Company
Institute of Metals Superplascity Problems of Academy of Science
Sheehan John P.
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