以Zr47Ti45Al5V3合金为研究对象,采用DSC、电子万能试验机、XRD和TEM,研究热处理对Zr-Ti合金微观组织以及力学性能的影响规律。结果表明,合金的初始组织为α+β结构,具有高强度低塑性;在560~750℃时合金发生α→β相转变,出现明显吸热峰,在此温度范围内进行回火处理会导致合金抗拉强度下降;800℃回火时,合金中的α相几乎全部转变为β相,塑性达到最大,但抗拉强度降至950 MPa;Zr-Ti合金的最佳回火温度为590℃,此时合金的抗拉强度为1 398 MPa,伸长率为3.1%。 Taking Zr47Ti45Al5V3 alloy as the research object, the influence of heat treatment on the microstructure and mechanical properties of Zr-Ti alloy was studied by DSC, electronic universal testing machine, XRD and TEM. The results show that the initial microstructure of the alloy is α + β structure with high strength and low plasticity. At 560 ~ 750 ℃, the alloy undergoes α → β phase transformation with obvious endothermic peak. The tempering in this temperature range will lead to The tensile strength of the alloy decreases and the tensile strength decreases to 950 MPa. The optimum tempering temperature of Zr-Ti alloy is 590 ℃ , The tensile strength of the alloy is 1 398 MPa and the elongation is 3.1%.