Determining the distribution of the heat content of filler metal droplets transferred into gas-metal arc weld pools

摘要

The distribution of the heat content of filler metal droplets inside the gas-metal arc (GMA) weld pool has a marked effect on the weld bead dimensions and the weld thermal cycle. A model is developed to account for this distribution. Volumetricdistribution of the heat content of droplets within the weld pool is considered as an internal heat generation term. Based on physical reality, an algorithm is proposed to deter mine the geometry and size of the volume within which the heat content ofdroplets is distributed. Bead-on-plate GMA welding experiments show that the predicted weld dimensions and temperature variations arc in agreement with the measured values.