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采用超声振动热效应转化和施加动态边界条件的方法对超声振动边界条件作近似处理,研究了超声振动辅助激光熔覆Ti C/Fe Al复合涂层的温度场分布规律,探讨了超声振幅和扫描速度对温度场的影响。结果表明,超声振动作用下,温度梯度为零的范围更大,温度场分布更为均匀;超声振动有效降低了涂层中和界面结合区的温度梯度及残余应力;超声振幅越大,扫描速度越小,基材和涂层的温度越高,涂层至界面结合区之间的温度梯度越小。
The ultrasonic vibration boundary conditions were approximated by the transformation of ultrasonic vibration thermal effect and the application of dynamic boundary conditions. The temperature field distribution of TiC / FeAl composite coating by ultrasonic vibration assisted laser cladding was studied. The ultrasonic amplitude and scanning velocity Effect on the temperature field. The results show that under the ultrasonic vibration, the range of temperature gradient is zero and the temperature field is more uniform. The ultrasonic vibration effectively reduces the temperature gradient and residual stress in the interface between the coating and the interface. The larger the ultrasonic amplitude, the faster the scanning speed The smaller, the higher the temperature of the substrate and the coating, the smaller the temperature gradient between the coating and the interface bonding zone.