PRODUCTION METHOD OF ROLLED SHEET FOR COLD-ROLLING, AND PRODUCTION METHOD OF PURE TITANIUM SHEET
First Claim
1. A method for producing rolled sheet for cold-rolling, the method comprising:
- hot-rolling a pure titanium material while coiling; and
annealing a hot-rolled sheet formed by the hot-rolling,wherein;
a coiling temperature in the hot-rolling is less than or equal to 500°
C; and
the annealing is controlled such that a percentage area of recrystallized grains in a microstructure of the hot-rolled sheet after the annealing is greater than or equal to 90%, and that a mean grain diameter of the recrystallized grains is greater than or equal to 5 μ
m and less than or equal to 10 μ
m.
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Accused Products
Abstract
An aspect of the present invention is a production method of a rolled sheet for cold-rolling, the method being characterized by including: a hot-rolling step for forming a rolled sheet by hot-rolling a pure titanium material while coiling; and an annealing step for annealing the hot-rolled sheet after the hot-rolling step, the coiling temperature in the hot-rolling step being 500° C. or less, and the annealing step being controlled so that the percentage area of recrystallized grains in the microstructure of the hot-rolled sheet after annealing is at least 90% and the mean grain size of the recrystallized grains is 5 μm to 10 μm.
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Citations
4 Claims
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1. A method for producing rolled sheet for cold-rolling, the method comprising:
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hot-rolling a pure titanium material while coiling; and annealing a hot-rolled sheet formed by the hot-rolling, wherein; a coiling temperature in the hot-rolling is less than or equal to 500°
C; andthe annealing is controlled such that a percentage area of recrystallized grains in a microstructure of the hot-rolled sheet after the annealing is greater than or equal to 90%, and that a mean grain diameter of the recrystallized grains is greater than or equal to 5 μ
m and less than or equal to 10 μ
m.- View Dependent Claims (2, 3, 4)
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Specification