Three Dimensional Numerical Simulation of Characteristics of Laser Welding Pool
[1]MEI Lifang,CHEN Youhai,YAN Dongbing,et al.Three Dimensional Numerical Simulation of Characteristics of Laser Welding Pool[J].Journal of Zhengzhou University (Engineering Science),2015,36(06):85-.[doi:10.3969/j.issn.1671-6833.2015.06.017]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
36
Number of periods:
2015 06
Page number:
85-
Column:
Public date:
2015-12-25
- Title:
- Three Dimensional Numerical Simulation of Characteristics of Laser Welding Pool
- Keywords:
- laser technology; welding; weld pool shape; temperature; numerical simulation
- CLC:
- TG456.7
- Abstract:
- For simulating the characteristics of laser deep penetration welding pool in three-dimensional,thewelding process was regarded as quasi-steady-state under a certain assumptions, and the mathematical modelsof pool shape and temperature distribution for laser welding low carbon were applied to solve the phase trans-formation interface. The mathematical simulations of laser welding pool shape and temperature filed were sim-plified to solve the integral equation of gas / liquid interface and solid / liquid interface. Then,the character-istics of weld pool shape were obtained.The results show that ,for laser weld pool,the lowest point lagged be-hind the optical axis center,the front wall gradient was steep,and the wear wall gradient was smooth. Theweld pool depth and width both increased with the increase of laser power,and decreased with the increase ofwelding speed. As laser spot radius increases,the weld pool depth increases，and the weld pool width decrea-ses. The highest temperature on the surface of weld pool also lagged behind the optical axis center,and the i-sothermals distributed dense which would indicate a narrow heat-affected zone.
- References:
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