Titanium sheet and method for manufacturing the same
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United States of America Patent
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Jan 26, 2021
Grant Date -
Oct 3, 2019
app pub date -
Jul 8, 2016
filing date -
Jul 8, 2016
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Abstract
To provide a titanium sheet excellent in formability and a method for manufacturing the same. A titanium sheet, wherein, when a carbon concentration of a base material is Cb (mass %) and a carbon concentration at a depth d μm from a surface is Cd (mass %), the depth d (carbon concentrated layer thickness) satisfying Cd/Cb>1.5 is 1.0 μm or more and less than 10.0 μm or less, wherein a Vickers hardness HV0.025 at a load of 0.245 N in the surface is 200 or more, a Vickers hardness HV0.05 at a load of 0.49 N in the surface is lower than HV0.025, and a difference between HV0.025 and HV0.05 is 30 or more, wherein a Vickers hardness HV1 at a load of 9.8 N in the surface is 150 or less, and wherein an average interval between cracks generated in the surface when a strain of 25% is given in a rolling direction in a bulging forming process is less than 50 μm and a depth thereof is 1 μm or more and less than 10 μm.
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