Metal treatment – Compositions – Heat treating
Patent
1990-07-26
1992-04-28
Roy, Upendra
Metal treatment
Compositions
Heat treating
148 115F, 148 127B, 148133, C22C 1400, C22C 100
Patent
active
051085178
ABSTRACT:
According to the present invention, titanium and titanium alloy materials having a fine equiaxed microstructure are produced. A titanium, .alpha. titanium alloy or (.alpha.+.beta.) titanium alloy material is hydrogenated in an amount of 0.02 to 2% by weight. If necessary, the hydrogenated material is subjected to pretreatment [i.e., heated above 700.degree. C. (.beta. transformation point)] and/or working (i.e., working at 450.degree. to 950.degree. C., or temperatures above .beta. transformation point and below 1100.degree. C.). The material is then aged at 10.degree. to 530.degree. C. or 10.degree. to 700.degree. C. (in the case of working at temperatures above .beta. transformation point), and finally dehydrogenated and recrystallized to prepared a material having a fine equiaxed microstructure.
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Hayashi Masayuki
Ishii Mitsuo
Kimura Kinichi
Takamura Jin-ichi
Yoshimura Hirofumi
Nippon Steel Corporation
Roy Upendra
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