3-D transient numerical simulation on the process of laser cladding by powder feeding  

作　　者：YanluHuang GongyingLiang JunyiSu 

机构地区：[1]SchoolofMaterialsScienceandEngineering,Xi＇anJiaotongUniversity,Xi＇an710049,China

出　　处：《Journal of University of Science and Technology Beijing》2004年第1期13-17,共5页北京科技大学学报（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China (No. 50271051) ;the Foundation of State Key Laboratory of Laser Technology, Huazhong University of Science and Technology.

摘　　要：A 3-D transient mathematical model for laser cladding by powder feeding wasdeveloped to examine the macroscopic heat and momentum transport during the process, based on whicha novel method for determining the configuration and thickness of cladding layer was presented. Byusing Lambert-Beer theorem and Mie's theory, the interaction between powder stream and laser beamwas treated to evoke their subtle effects on heat transfer and fluid flow in laser molten pool. Thenumerical study was performed in a co-ordinate system moving with the laser at a constant scanningspeed. A fixed grid enthalpy-porosity approach was used, which predicted the evolutionarydevelopment of the laser molten pool. The commercial software PHOENICS, to which several moduleswere appended, was used to accomplish the simulation. The results obtained by the simulation werecoincident with those measured in experiment basically.A 3-D transient mathematical model for laser cladding by powder feeding wasdeveloped to examine the macroscopic heat and momentum transport during the process, based on whicha novel method for determining the configuration and thickness of cladding layer was presented. Byusing Lambert-Beer theorem and Mie's theory, the interaction between powder stream and laser beamwas treated to evoke their subtle effects on heat transfer and fluid flow in laser molten pool. Thenumerical study was performed in a co-ordinate system moving with the laser at a constant scanningspeed. A fixed grid enthalpy-porosity approach was used, which predicted the evolutionarydevelopment of the laser molten pool. The commercial software PHOENICS, to which several moduleswere appended, was used to accomplish the simulation. The results obtained by the simulation werecoincident with those measured in experiment basically.

关 键 词：powder feeding laser cladding numerical simulation cladding track HEATTRANSFER 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TP391.9[金属学及工艺—金属学]