Numerical Simulation for Keyhole Profile and Their Effect of TC4 Titanium Alloy during Laser Welding

作者：Zhang Kerong^*; Zhang Jianxun

来源：Rare Metal Materials and Engineering, 2009, 38(6): 987-990.

• laser welding
• laser parameter
• temperature distribution
• keyhole profile

According to the characteristics of the existence of keyhole phenomena on TC4 titanium alloy during laser welding, a precise calculation model fitting to the keyhole size in micron dimension has been developed. Using the Gaussian rotating curved body heat source fitting for the keyhole profile and combining the material property of TC4 titanium alloy, the distribution characteristics of keyhole profile and transient welding temperature varying with the laser parameters have obtained. The greatest influences of laser welding parameters on keyhole profile of TC4 titanium alloy have been found out by analyzing the specificity size and temperature distribution in front and back edge of the keyhole and in radial and depth direction of the keyhole. The optimal range of laser welding parameters to obtain the best keyhole profile and temperature distribution of TC4 titanium alloy during laser welding has been found out by analyzing the influence of every welding parameter.

• 出版日期2009-6
• 单位西安交通大学