Metal treatment – Process of modifying or maintaining internal physical... – Chemical-heat removing or burning of metal
Patent
1987-12-04
1989-04-11
Roy, Upendra
Metal treatment
Process of modifying or maintaining internal physical...
Chemical-heat removing or burning of metal
148 131, 148 203, C22F 118
Patent
active
048203602
ABSTRACT:
A method for improving the microstructure of cast titanium alloy articles which comprises the steps of hydrogenating the cast article at a temperature near or above the titanium-hydrogen eutectoid of 815.degree. C. (of about 780.degree. to 1020.degree. C.) to a hydrogen level of about 0.50 to 1.50 weight percent, cooling the thus-hydrogenated article to room temperature at a controlled rate, heating the thus-cooled, hydrogenated article to a temperature of about 650.degree. to 750.degree. C., applying a vacuum to dehydrogenate the article, and cooling the thus-dehydrogenated article at a controlled rate.
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patent: 4612066 (1986-09-01), Levin et al.
patent: 4680063 (1987-07-01), Vogt et al.
W. R. Kerr et al, "Hydrogen as an Alloying Element in Titanium (Hydrovac)", Titanium '80 Science and Technology, (1980), pp. 2477-2486.
Eylon Daniel
Froes Francis H.
Yolton Charles F.
Bricker Charles E.
Roy Upendra
Singer Donald J.
The United States of America as represented by the Secretary of
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