Hello new tito, have had a bit of experience in this vein. My son was a fairly heavy duty drummer for a number of years and also had friends doing the same. Dad, being a welder, was fair game for anything that broke and the boys and gals felt could be fixed. A couple of things, the problem with welding or soldering a cymbal is one mainly of losing the tone of the instrument, when you go to welding on it or applying heat to it it can lose it's tone. generally it will go flat. Another issue is, unless you are able to get complete fusion on the crack it will just end up coming back in my experience. I have used silicon bronze and the tig process to make repairs such as you are inquiring about, yet as I also mentioned the tonal quality generally suffered a bit. To the repair, if you decide to attempt it, clean the crack thoroughly, use a good heat sink and possibly V the crack with a dremel tool to insure that you can get complete fusion. In some cases you may need to weld the one side and then use the dremel to grind from the other side until you have removed material down to the backside of the weld material that you applied from the other side and then fill out this V. Can't make any guarantees on this, sometimes you'll experience success and other times well...... My $.02. Best regards, aevald
As an ex-drummer who has done this before...
You can repair it and the cymbal will still make noise when you hit it, but it will never be anywhere near the same.
Just drill a 3/16" dia hole at the end of the crack and insert a rivit. This will get you by until you can replace it.
Brazing would fill the crack, but it still deadens the cymbal.
Tim