フラッシュ溶接部の脱炭層の生成条件およびそれが疲れ強さにおよぼす影響

概要

論文の詳細を見る
Effect of the welding conditions, such as flashing time, flashing speed, upset distance, upset time and shielding atmospheres on the formation of decarburized zone in 0.5 C steel flash welds were discussed. It was interesting to note the results of experiment that the width of decarburized zone tended to increase in upset time, whereas the change in other conditions did not affect it. Specimens that had narrow and wide decarburized zones made with flash welding were tested on fatigue streagth. The main results could be summarized as folllows. (1) Both widthes of decarburized zone had no effect on the static tensile strength. (2) The width of decarburized zone could not be made to zero by welding conditions (3) The width of decarburized zone were 1.6-1.8mm in wide zone and 0.2-0.4mm in narrow zone. (4) The increased width of decarburized zone decreased the fatigue strength.
1974-11-05