轧制温度与变形量对TB2钛合金微观组织和力学性能的影响

通过X射线衍射仪、光学显微镜、扫描电镜、硬度计以及万能拉伸试验机等研究了不同轧制温度及变形量对TB2钛合金显微组织、相结构以及力学性能的影响。结果表明，在600℃轧制处理后，TB2钛合金由β相和α相组成。同一轧制温度下，随着变形量的增加，晶粒被明显拉长，基体中的β晶粒部分破碎，并在晶界处出现大量再结晶晶粒。当轧制温度为600℃,变形量为60%时，合金的抗拉强度最大，可达到1360 MPa,伸长率为5.7%;而当轧制温度为600℃,变形量为40%时，合金的抗拉强度最大，可达到1270 MPa,伸长率为10.9%,综合力学性能较好。

Effect of rolling temperature and amount on microstructure and mechanical properties of TB2 titanium alloy

Effects of rolling temperature and deformation amount on microstructure, phase structure and mechanical properties of the TB2 titanium alloy were studied by means of X-ray diffractometer, optical microscope, scanning electron microscope, hardness tester and universal tensile testing machine. The results show that after rolling at 600 ℃, the TB2 titanium alloy consists of β and α phases. At the same rolling temperature, as the deformation amount increases, the grains in the alloy are elongated, the β phase in the matrix is partially broken, and a large amount of recrystallization grains form on the grain boundaries. When the rolling temperature is 600 ℃ and the deformation is 60%, the maximum tensile strength of the alloy can reach 1360 MPa and the elongation is 5.7%. When the rolling temperature is 600 ℃ and the deformation is 40%, the maximum tensile strength of the alloy reaches 1270 MPa, the elongation is 10.9%, and the comprehensive mechanical properties are better.