激光熔覆Ni-Cr-Fe-B合金涂层的熔池温度场模拟研究  

The Formation of Molten Pool in Laser Cladding of Ni-Cr-Fe-B Alloy Coating

作　　者：王帅[1] 李川[1] 吴海涛[1] 秦渊[1] 杨森[1] 

机构地区：[1]南京理工大学材料科学与工程学院,江苏南京210094

出　　处：《应用激光》2015年第3期282-287,共6页Applied Laser

基　　金：国家自然科学科学基金资助项目(项目编号:51205210);中央高校基本科研业务费专项资助项目(项目编号:30920130112010)

摘　　要：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,对工艺参数在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.

关 键 词：激光熔覆 熔池形貌 有限元法 温度场 

分 类 号：TG178[金属学及工艺—金属表面处理]