日本专家为了提高钛铝合金的高温强度和改善其室温延展性 ,在钛铝合金中添加铌和钽 ,以研究这两种元素对钛铝等温锻造材高温特性的影响。研究结果表明 :一、单独添加铌和钽 ,不影响合金的等温锻造性 ;二、单独添加铌 ,能使 80 0℃左右的高温强度提高 ,但不一定能改善室温延展性 Japanese experts in order to improve the high temperature strength of titanium-aluminum alloy and to improve its room temperature ductility niobium and tantalum in titanium aluminum alloy to study the two elements of titanium aluminum isothermal forging high temperature properties. The results show that: (1) niobium and tantalum alone can be added without affecting the isothermal forgeability of the alloy; (ii) niobium alone can increase the high temperature strength of 80 0 ℃, but not necessarily improve the ductility