Patent ID: 6719856
Filing Date: 2004-04-13
Classification: B21B,C22C,C22F

Abstract:
Titanium having impact resistance consisting essentially of total concentration S of oxygen, nitrogen and carbon, [O], [N], and [C], between 0.04 and 0.27 mass percent, not more than 0.1 mass percent iron, substantially no copper, and the balance being titanium and unavoidable impurities, and having Vickers hardness Hv* controlled by work-hardening to the range satisfying one of the following equations (1), (2) and (3):when 0.04&lE;S&lE;0.09 (mass percent) 150&lE;Hv*&lE;400Ã—S+175â€ƒâ€ƒ(1) when 0.09&lE;S&lE;0.20 (mass percent) 510Ã—S+104&lE;Hv*&lE;400Ã—S+175â€ƒâ€ƒ(2) when 0.20&lE;S&lE;0.27 (mass percent) 510Ã—S+104&lE;Hv*&lE;255â€ƒâ€ƒ(3) wherein S: [O]+[N]+[C] (mass percent) Hv*: Vickers hardness in the cross-sectional area of the work-hardened product.