Brazing might be a better option than welding, assuming it's steel.
As mentioned by others, there are many types of welding and experience. Some welding methods are more appropriate than others, and most people have their own areas of expertise.
Originally Posted by
dabrucru
the tubing it does not seem to be affected, since its just a metal plate to which the stand an mudguard atteches.
Anyway, if just the kickstand bracket is cracked, but the frame itself is fine, then don't use the kickstand.
How about a picture ?