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对Ti_3Al基合金Ti_3Al-26M,Ti_3Al-11.5M和Ti_3Al-22M(wt%)(M=Nb,Mo,V)的热处理与显微组织和显微组织与蠕变性能之间的关系进行了探讨。结果表明:同一合金在不同热处理条件下的显微组织具有不同的特征和尺寸,而在同一热处理条件下的3种合金显微组织特征相同,只是晶粒的尺寸不同。高温蠕变性能测定表明,Ti_3Al-26M合金的蠕变性能优于Ti_3Al-11.5M和Ti_3Al-22M合金。Ti_3Al-26M合金经β固溶处理的魏氏组织的蠕变性能最好,经α_2+β固溶+时效和工厂处理的等轴组织蠕变性能次之。Ti_3Al-26M合金α_2+β固溶+时效状态的稳态蠕变速率与温度和应力的关系研究表明。随着温度和应力的增加稳态蠕变速率明显增加,并且随温度影响更为明显。
The heat treatment of Ti 3 Al-26M, Ti 3 Al-11.5M and Ti 3 Al 22M (wt%) (M = Nb, Mo, V) was studied in relation to the microstructure and the microstructure and creep properties . The results show that the microstructures of the same alloy have different characteristics and sizes under different heat treatment conditions, while the three alloys under the same heat treatment have the same microstructures except that the sizes of the grains are different. The creep property of Ti_3Al-26M alloy is better than that of Ti_3Al-11.5M and Ti_3Al-22M alloys. The Wigner’s structure of Ti_3Al-26M alloy treated by β-solution treatment had the best creep property, followed by the α_2 + β solution + aging and the plant-processed equiax structure. The relationship between steady state creep rate and temperature and stress of α_2 + β solution and aging state in Ti_3Al-26M alloy is shown. With the increase of temperature and stress, the steady creep rate obviously increases, and it is more obvious with the temperature.