| 摘要 |
PROBLEM TO BE SOLVED: To produce a titanate plate excellent in strength and moldability.SOLUTION: The titanium plate has, by mass%, an iron content of 0.01 to 0.1%, an oxygen content of 0.02 to 0.15%, a carbon content of 0.015% or less, a nitrogen content of 0.015% or less, a hydrogen content of 0.015% or less and the balance titanium with inevitable impurities. In the titanium plate, the arithmetic average roughness (Ra) in the L direction is 0.2 to 0.8 μm; the arithmetic average roughness in the T direction is not less than 1.1 times to not more than 2 times that in the L direction; deformation twins are present in a range of 0.05 t to 0.2 t from a surface layer when a plate thickness is t; the Vickers hardness at a measurement load of 0.25 N in the surface is 170 or more; the Vickers hardness at a measurement load of 9.8 N in the surface is 90 to 180; and the Vickers hardness at a measurement load of 0.25 N is not less than 1.5 times the Vickers hardness at a measurement load of 9.8 N.SELECTED DRAWING: Figure 5 |
