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    • 2. 发明专利
    • Pure titanium sheet excellent in balance between stamping formability and strength
    • 纯钛片与冲压强度之间的平衡优良
    • JP2012158776A
    • 2012-08-23
    • JP2011017109
    • 2011-01-28
    • Kobe Steel Ltd株式会社神戸製鋼所
    • FUJITA TERUHISAHENMI YOSHIOOYAMA HIDETOKUDO TAKESHIMURAKAMI SHOGO
    • C22F1/18B21B3/00C22C14/00C22F1/00
    • C22F1/183C22C14/00F28F21/086
    • PROBLEM TO BE SOLVED: To provide a titanium plate having a strength of JIS class 2 level (215 MPa at 0.2% proof stress) or higher and having excellent press formability.SOLUTION: There is provided a pure titanium plate composed of titanium and the balance of unavoidable impurities, which pure titanium plate has characteristics: that the relationship between the average (SF) of the Schmidt factors of (11-22) twin crystals along the axis in the rolling direction in the respective hexagonal crystal structure crystal grains of the pure titanium plate and the average crystal grain diameter (d: μm) of the structure of the pure titanium plate satisfies formula (1) below; the strength is 215 MPa or higher; and the balance between press formability and strength is excellent. Expression (1): 0.055≤SF/√d≤0.084 (wherein 25≤d≤75).
    • 要解决的问题:提供具有JIS 2级强度(0.2%屈服应力下的215MPa)或更高并且压制成型性优异的钛板。 解决方案:提供由钛构成的纯钛板和余量的不可避免的杂质,纯钛板具有以下特征:(11-22)双晶的Schmidt因子的平均值(SF)之间的关系 在纯钛板的各个六方晶系结晶晶粒中的沿轧制方向的轴线和纯钛板的结构的平均晶粒直径(d:μm)满足下式(1): 强度为215MPa以上; 冲压成形性和强度之间的平衡优异。 表达式(1):0.055≤SF/√d≤0.084(其中25≤d≤75)。 版权所有(C)2012,JPO&INPIT