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采用焊接热模拟技术,通过Gleeble-1500D型热模拟试验机,模拟Ti35钛合金自高温以不同冷却速度冷却的过程,研究焊后冷却速度对Ti35钛合金焊接热影响区组织和性能的影响。研究结果表明:在相同的热输入量条件下,随冷却速度的提高,材料的强度增大,塑性增强;在较低的冷却速度下,热循环试样的冲击韧性值较低,晶粒组织较粗大;不同冷却速度的均温区试样在模拟料液下均具有较好的耐蚀性能。
The effects of cooling rate after welding on the microstructure and properties of the heat-affected zone of Ti35 titanium alloy were studied by using Gleeble-1500D thermal simulation tester and simulating the cooling process of Ti35 titanium alloy at different cooling rates. The results show that with the same heat input, with the increase of cooling rate, the strength of the material increases and the plasticity increases. At the lower cooling rate, the impact toughness of the thermal cycling specimen is lower, and the grain structure Thicker; the average cooling rate of different temperature samples in the simulated liquid have good corrosion resistance.