Effect of Welding Conditions on the Formation of Decarburized Zone in the Flash Welds and of its Zone on the Fatigue Strength
1974 Volume 43 Issue 11 Pages 1086-1092
Details
1974 Volume 43 Issue 11 Pages 1086-1092
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 strength.
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—1.8 mm in wide zone and 0.2—0.4 mm in narrow zone.
(4) The increased width of decarburized zone decreased the fatigue strength.
