利用光纤激光器在不锈钢表面激光熔覆镍基合金,基于同轴送粉激光快速成型工艺建立了熔池温度场瞬态模型,对工艺参数对材料熔池形态和内部温度场的数值模拟结果表明,在所述的试验条件下,扫描速度和送粉率对熔覆层的形貌影响显著,建立的数值模拟结果与试验结果有较好的吻合,数值模拟模型可为熔覆工艺参数提供参考.

The experiment of laser cladding was carried out to deposit nickel base alloy powder on the surface of stainless steel using the fiber laser.The transient model of molten pool temperature field is established based on the process of coaxial feeding laser rapid manufacturing.The numerical simulation results of the influence of process parameters on the pool morphology and internal temperature field show that the scanning speed and feeding rate had a great effect on the morphology of the cladding layer under the test conditions described in this article.The numerical simulation results have a good match with the experimental results.The numerical simulation model can provide reference for cladding process parameters.