鋼材の熔接諸条件と冷却時間(第 3 報) : 被覆アーク熔接の場合の冷却時間の推定

概要

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In case of manual arc welding carbon steels or high tensile steels (low alloy steels) with covered electrodes, the cooling time (S sec.) from 800℃ to 500℃ near fusion line can be calculated by the following experimental formula, [numerical formula] [frgure] Namely, the cooling time is determined mainly by arc energy per unit bead length J=60EI/v, preheating temperature T_0 and plate thickness t. The other variables, that is, kinds of steel and covered electrode, kind of welding current, AC or DC, and others, have only small effects on the cooling time and it is considered that deviations of measured points from the mean line decided by the above mentioned main factors are due to these small effects. The above formula is applicable at the center parts of a bead, when the bead length and plate width are comparatively larger. Next, according to the formula, a very convenient nomograph which is used practically was constructed.
社団法人溶接学会の論文
1959-01-25