TEMPERATURE CONTROL METHOD OF WELDING POINT

摘要

This method provides a soundness of weld zone from a metallurgical point of view at the multilayer welding of extra-thick steel plate, and prevents weld crack at weld zone. Temperature controlling method consists of the following steps: (1) perceiving of temperature on the upper and lower sides of weld zone by the temperature sensor using calculating equation about temperature distribution(T-To) of three dimensional weld zone (here, T; the temperature of weld zone, To; the temperature of plate before welding, and in figure, E and F; respectively the temperature sensor of the upper plate and lower plate); (2) maintaining of designated interlayer temperature; (3) perceiving of the welding number of each interlayer; (4) storing and comparing of the maximum temperatures of initial layer at multilayer welding and continuous welding; and (5) finishing of welding process at the same maximum temperature as the maximum temperature of lower side at initial layer.