First off, you need to bring it up to good red heat and flux the crap out of it, let the flux work a while at welding heat and then twist the crap out of it. Then wire brush it really good, flux it back up again, let it soak at welding heat and then hammer it with light blows keeping it round. Once you start to get a good solid weld, hammer the crap out of it at welding heats, Take your time and when you think you have it finish welded, work on it for another 2 or 3 welding heats. You won't hurt it if you keep it in a good welding heat range and don't over heat it. The last and most important step is to pray a lot.
Good luck,
Bill
