Study on Junction Line Entering of Seam Welding for GH163
The junction line entering is the common flaw that can be easily seen during the seam welding of nickel based supper alloys.Stress concentration can be easily created in the junction line entering,which reduces the effective nugget size,develops cracks and damages the joint,so the welding quality is seriously affected when bearing moving load.Therefore,it is necessary to study its forming reason and mechanics.The forming reason of junction line entering and its forming mechanics were studied through SEM,which provided the theory base for improving the problem of the junction line entering in the seam welding of supper alloys.