Titanium or titanium alloy plate excellent in balance between press formability and strength
AssigneeKobe Steel, Ltd.
InventorsAkihisa Fujita, Hideto Oyama, Yoshio Itsumi, Tadashige Nakamoto, Kayo Yamamoto
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Abstract
Disclosed is a titanium or titanium alloy plate rolled in one direction, wherein a lubricating film is coated on the surface and the coefficient of sliding friction of the lubricating film-coated surface is controlled to less than 0.15. The elongation (L-El) of the titanium or titanium alloy plate in the rolling direction and the r value (T-r) in the direction perpendicular to the rolling direction have the following relation (1). (T-r)/(L-El)≧0.07 (1)
Claims14
A titanium or titanium alloy plate, comprising a titanium or titanium alloy base plate having been rolled in one direction and a lubrication film applied on a surface of the titanium or titanium alloy base plate,
- wherein the surface of the lubrication film has a coefficient of sliding friction less than 0.15, and
- wherein the titanium or titanium alloy base plate has an elongation in the rolling direction (L-El) and a r value in a direction perpendicular to the rolling direction (T-r) as determined by the ASTM E8 protocol, and wherein:
- (T-r)/(L-El)≧0.07.
Dependencies are inferred from the claim text.