微量B、Mg对TiAl金属间化合物热变形行为的影响

The effects of B and Mg on the hot deformation Of TiAl

在１２７３～１５２３Ｋ的温度和１０－３～１００ｓ－１的应变速率范围内研究了微量元素Ｂ，Ｍｇ对固溶有Ｃｒ，Ｖ合金元素的ＴｉＡｌ金属间化合物热变形性能的影响，计算并建立了相应的热变形方程和热加工图，确定了实验合金的动态再结晶峰应力．结果表明：Ｂ，Ｍｇ的加入提高了ＴｉＡｌＣｒＶ合金的形变激活能，尤其是Ｍｇ的加入能显著改善ＴｉＡｌＣｒＶ金属间化合物的热加工性能．

The effects of B and Mg on the hot deformation of TiAl intermetallic compound hsvebeen Studied in the present peper. The results show that the addition of B,Mg can increasethe deformation activation energy of TiAlCrV alloy and the hot workability of TiAJCrV alloy can be improved remarkedly by Mg.