Posted by Lanse on March 20, 2013 at 09:22:54 from (206.55.217.126):
Goodafternoon, everyone!!
So, this is the latest of my Cast Iron welding videos... I repaired a crack in a transmission housing without any kind of a preheat, or a post-heat...
Basically, Cast Iron cracks when it's heated and/or cooled rapidly, hence the reason why its usually pre-heated and allowed to cool slowly, but theres a chance that you can get around this by just not getting it very hot...
I used a Nickel-99 electrode to make welds under 1" in length, which I then peened and allowed to cool completely, so that I could run my fingers directly over the weld, at which point I ran another short weld using the "back-stepping" technique, and repeated...
This is a technique that can be used with any of the main electric arc welding processes... I've seen it done with TIG using stainless filler, and I've heard of people having success with it running MIG , again with stainless filler...
Its just a little technique that I heard of, and had to try, I made a video about it and just thought i'd share... Doesnt seem like a bad way to weld a cracked engine block or something along those lines...
Well, hope you guys like the video... Have a great week, everyone!! :)
Audio/Video clip:video1
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