Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Patent
1990-12-19
1992-06-30
Roy, Upendra
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
148691, C22F 100
Patent
active
051259869
ABSTRACT:
This present invention is characterized in that a titanium material on an .alpha. or (.alpha.+.beta.) titanium alloy material hydrogenated in an amount of 0.02 to 2% by weight of hydrogen is heated to a temperature above the .beta. transformation point and below 1100.degree. C., is hot worked in that temperature range at a reduction of 30% or more, the hot working is terminated in a .beta. single phase temperature region, and cooling to 400.degree. C. or less, and annealing in vacuum are then carried out, whereby titanium and titanium alloy materials having a fine acicular microstructure are obtained.
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Hayashi Masayuki
Ishii Mitsuo
Kimura Kinichi
Takamura Jin-ichi
Yoshimura Hirofumi
Nippon Steel Corporation
Roy Upendra
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