| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat-resistant titanium alloy cold-rolling stock having a higher impact resistance than a conventional one and excellent in cold rollability and cold handleability, at low cost.SOLUTION: A heat-resistant titanium alloy cold-rolling stock excellent in cold rollability and cold handleability is characterized in that a heat-resistant titanium alloy hot-rolled sheet contains, by mass, 0.2% to below 0.5% Si, 0.10% to less than 0.40% Fe, and 0.01% to less than 0.10% O, and has a maximum value of the distribution in the rolling direction of the (0002) plane orientation of the α phase tilting from the sheet normal direction to the rolling direction in the range of from 10° to less than 20°. This stock can be produced by performing unidirectional hot rolling at a heating temperature of 800°C to 870°C, at a final rolling temperature of 700°C or less, and at a reduction ratio of 95% or more. Thus, a heat-resistant titanium alloy sheet excellent in cold rollability and cold handleability can be produced more inexpensively than in a conventional case, to thereby obtain extensive utilization effects owing to its properties of lightness and high strength. |
