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  

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

作　　者：张雄 景然[1,2] 张晴 刘以柔 吴倩 李江华 炊鹏飞[1,2] Zhang Xiong;Jing Ran;Zhang Qing;Liu Yirou;Wu Qian;Li Jianghua;Chui Pengfei(School of Materials Science and Engineering,Shaanxi University of Technology,Hanzhong Shaanxi 723000,China;National&Local Joint Engineering Laboratory for Slag Comprehensive Utilization and Environmental Technology,Shaanxi University of Technology,Hanzhong Shaanxi 723000,China)

机构地区：[1]陕西理工大学材料科学与工程学院,陕西汉中723000 [2]陕西理工大学矿渣综合利用环保技术国家与地方联合工程实验室,陕西汉中723000

出　　处：《金属热处理》2023年第2期206-211,共6页Heat Treatment of Metals

基　　金：国家自然科学基金(51901120);陕西省自然科学基础研究计划(2019JQ-881,2020JQ-871);陕西省教育厅专项科研计划(19JK0170)。

摘　　要：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。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.

关 键 词：TB2钛合金 轧制温度 显微组织 力学性能 

分 类 号：TG166.5[金属学及工艺—热处理]