put a small washer on the stud first. weld it to the broken stud - even if it is below the surface. place a nut on top of the washer and weld it through the inside of the nut until it is near full to the top . let it cool a few seconds [ like 10-15 ] then while it is still very hot, turn the nut out and it will bring the stud with it with ease .
Yup. Problem is that you now need to weld to the original stud. Since the extractor is hard, it will just break (shatter) if you try to put any force on it after welding (such as trying to unscrew the bolt).
