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PRODUCTION METHOD OF ROLLED SHEET FOR COLD-ROLLING, AND PRODUCTION METHOD OF PURE TITANIUM SHEET

  • US 20180298479A1
  • Filed: 03/16/2016
  • Published: 10/18/2018
  • Est. Priority Date: 03/25/2015
  • Status: Active Grant
First Claim
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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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