摘要
研究了TA17钛合金的退火工艺,退火温度分别为820℃和910℃,在退火处理过程中采用不同的冷却速率。使用光学显微镜观察不同退火工艺处理后合金的微观组织形貌,测试合金的拉伸性能并观察其断口形貌,同时,使用数字式显微硬度计测试不同处理状态下合金的显微硬度。结果表明,820℃退火处理合金发生再结晶,组织为少量等轴β相和基体α相。经820℃退火/炉冷处理合金的β相最细小且分布均匀,综合力学性能较好;910℃退火处理后合金组织为板条状α相和晶间β相,α相与β相尺寸较大,合金的塑性较低。
The annealing process of TA17 titanium alloy was studied. The annealing temperature was 820 ℃ and 910 ℃.Different cooling rates were used in the annealing process. The microstructure morphologies of the alloy treated by different annealing processes were observed by optical microscope. The tensile properties of the alloy were tested and the fracture morphologies were observed. At the same time, a digital microhardness tester was used to test the microhardness of the alloy under different processing conditions. The results show that, recrystallization occurs in the alloy annealed at 820 ℃, and the microstructure is a small amount of isometric β phase and matrix α phase. The β phase of the alloy annealed at 820 ℃ with furnace cooling is the smallest and the distribution is uniform. The comprehensive mechanical properties of the alloy are better. After annealing at 910 ℃, the microstructure of the alloy consists of lath α phase and intergranular β phase. The size ofα phase and β phase is larger, and the plasticity of the alloy is lower.
作者
张宁
曹贯宇
冀鹏飞
杨伟莹
李峰
刘景顺
ZHANG Ning;CAO Guanyu;JI Pengfei;YANG Weiying;LI Feng;LIU Jingshun(School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010051, China)
出处
《热加工工艺》
北大核心
2019年第14期133-136,共4页
Hot Working Technology
基金
内蒙古自治区大学生创新创业训练计划项目(201810128004)
内蒙古工业大学科研基金重点项目(ZD201405)
关键词
TA17
热处理工艺
组织
力学性能
TA17
heat treatment process
microstructure
mechanical properties
