Abstract
It is pointed out that the calorimetric estimation of the welding pool temperature described in Christensen and Chipman's report concerning slag-metal interaction in the pool is based on the misuse of the result of Wells's paper which treats the two dimensional heat flow in welding. Wells's paper shows that M=q/c pvdTf approaches 2 when vd/2α takes large values. Using this fact, they calculated the temperature considering q/2 is the heat content of the nugget when the nugget is in molten state, q being measured calorimetrically. It is clear, however, that the above mentioned Wells's result does not mean that q/2 is the heat content of the molten pool.
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