| 摘要 |
PURPOSE:To obtain a beta single phase-type Ti alloy having improved cold workability by incorporating, as principal components, specific amounts of V, Al, Cr, Fe and Mn to Ti. CONSTITUTION:The Ti alloy consists of, by weight, 8-25% V, 0.5-5% Al, <1.0% Cr, <=1.0% Fe, <=1.0% Mn and the balance essentially Ti, whose hardness after solution heat treatment is limited to <=HrC25. In this way, cold workability can be improved. Moreover, if necessary, when 0.01-3.0% REM and <=5%, in total, of >=1 kind among 0.01-1.0%, each, of Ca, S, Se, Te, Pb and Bi are incorporated to the above composition, machinability can be improved besides cold workability. This Ti alloy can be used in various fields such as material for space planes, automobile material, material for machine structural use, biomaterial, material for general civilian goods, and the like.
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