热氢处理对TA15钛合金组织及性能的影响

Effect of thermal hydrogen treatment on microstructure and properties of TA15 titanium alloy

采用真空气相热氢处理炉得到不同氢含量的TA15钛合金试样,利用扫描电镜、夏比冲击设备以及带传感器的机床等对不同氢含量的钛合金试样进行切削力获取及组织形貌观察,研究热氢处理过程中不同氢含量TA15钛合金试样的组织结构演变和力学性能规律。结果表明,TA15钛合金试样热氢处理后会出现不同程度的组织细化;热氢处理后的TA15钛合金试样的主切削力会随着氢含量的增加而增加,在氢含量为0.51%时,主切削力随着切削速度增加而减少,其他氢含量的TA15钛合金试样的主切削力随切削速度增加而先增加后减小;热氢处理后的TA15钛合金试样冲击吸收能量会随着氢含量的增加而降低。

TA15 titanium alloy specimen with different hydrogen contents was obtained by using a vacuum gas-phase thermal hydrogen treatment furnace,and the cutting force and microstructure of the specimen was tested and observed by means of a machine tool with sensors,and scanning electron microscope,Charpy impact tester,respectively.At the same time,the structural evolution and mechanical properties laws of TA15 titanium alloy specimen with different hydrogen content during thermal hydrogen treatment were studied.The results show that the TA15 titanium alloy specimen have different degrees of microstructure refinement after thermal hydrogen treatment;the main cutting force of the TA15 titanium alloy specimen after thermal hydrogen treatment increases with the increase of hydrogen content,and when the hydrogen content is 0.51%,the main cutting force decreases with the increase of cutting speed.The main cutting force of TA15 titanium alloy specimen with other hydrogen content first increases and then decreases with the increase of cutting speed;the impact absorbed energy of TA15 titanium alloy specimen after thermal hydrogen treatment decreases as the hydrogen content increases.