论文部分内容阅读
根据激光重熔的特点,考虑了材料热物性参数、换热系数、相变潜热随温度变化的因素,应用ANSYS的参数化设计语言建立了TC4钛合金表面激光重熔等离子喷涂NiCoCrAl-Y2O3涂层连续移动三维温度场有限元模型,并分析了激光功率和扫描速度对温度场的影响。结果表明:与激光功率相比,激光扫描速度对试样温度场的影响较小。实验结果较好地验证了模拟结果,表明所建立的温度场计算模型是正确和可靠的。通过该计算模型,可以掌握激光重熔过程加热和冷却规律,为制备高性能的MCrAlY涂层优化工艺参数提供依据。
According to the characteristics of laser remelting, considering the factors of thermophysical parameters, heat transfer coefficient and latent heat of transformation with temperature, the NiCoCrAl-Y2O3 coating on TC4 titanium alloy was established by ANSYS parametric design language The three-dimensional finite element model of the temperature field was continuously moved, and the influence of laser power and scanning speed on the temperature field was analyzed. The results show that the laser scanning speed has little effect on the temperature field of the sample compared with the laser power. The experimental results verify the simulation results well, indicating that the established temperature field calculation model is correct and reliable. The calculation model can grasp the rule of heating and cooling in the laser remelting process, and provide the basis for optimizing the process parameters for preparing high performance MCrAlY coating.