温度场模拟激光熔覆TC11钛合金工艺参数的选择

发布时间：2018-06-08 22:22

  本文选题：激光技术 + 激光熔覆　； 参考：《激光与红外》2017年03期

【摘要】：以通过激光熔覆修复钛合金薄壁件并在钛合金表面获得优质激光熔覆涂层为目标,运用ANSYS软件对同步送粉式激光熔覆的温度场进行了三维建模数值模拟。基于该模型对激光熔覆过程中的温度场分布和工艺参数进行了分析。结果表明,激光扫描方向前方的表面温度场相比后方熔池温度小,等温线密集,温度梯度大,熔覆两道后熔覆道1没有重熔,并且对熔覆道2产生预热作用。激光加工的快速加热和冷却的特性显著,冷却时的冷却速度可达10~4℃/s,在其他工艺参数不变的情况下,理论上在激光功率P=1100 W,扫描速度v=4 mm/s,光斑直径d=1 mm时模拟过程可获得良好的冶金结合,为修复薄壁零件提供了借鉴和指导作用。
[Abstract]:Aimed at repairing thin-walled titanium alloy by laser cladding and obtaining high quality laser cladding coating on titanium alloy surface, the temperature field of laser cladding with synchronous powder feeding was simulated numerically by using ANSYS software. Based on the model, the temperature field distribution and process parameters during laser cladding are analyzed. The results show that the surface temperature field in front of the laser scanning direction is smaller than that in the rear melting pool, the isotherm is dense, the temperature gradient is large, and the cladding channel 1 does not remelt after cladding. The rapid heating and cooling characteristics of laser processing are remarkable. The cooling rate can reach 10 ~ 4 鈩，

本文编号：1997421