I'm about to attempt a crack repair on a cast iron piece. It was recommended to me to use a silicon bronze filler to essentially braze it together. (w/TIG) anyway... i did a test on some old angle iron to see how this filler works and it was no problem and after doing both sides it proved to be as strong as the metal. my question is after the brazing the filler appeared black. I sort of expected to see a shiny brass look. a quick hit with a wire wheel and there was the brass look. is that normal? or is my argon flow too little or too much?
Thanks!
Thanks!