i tig'ed some cast iron

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i tig'ed a piece of cast iron together today, it was a piece on a vise i have, i heated it up some with a torch then fusion tig'ed it (without filler rod), tapped it with a small hammer while it cooled to stress relieve it some. i thought cast could only be stick welded with a nickel rod... i'll get a pic tommorowStangnetShop Full Of Stuff. Joey
Reply:Yeah, I would like to see that.
Reply:did you ask any one for advise or are you all knowing. i use ni. 99 or ni 55 tig rod. i don,t think you have accomplished any thing
Reply:i just thought it was near impossible, i haven't tried to break it yet.., lemme grab a pic of itStangnetShop Full Of Stuff. Joey
Reply:..................................................  ......................... Attached ImagesStangnetShop Full Of Stuff. Joey
Reply:222222222222222222222222222222222222222  i will take a sharper one Attached ImagesStangnetShop Full Of Stuff. Joey
Reply:sharper pic......................... Attached ImagesStangnetShop Full Of Stuff. Joey
Reply:another....................... Attached ImagesStangnetShop Full Of Stuff. Joey
Reply:last one for now Attached ImagesStangnetShop Full Of Stuff. Joey
Reply:You can weld cast iron with cast iron welding rod using a gas torch and flux or as you have done with a TIG torch.   The proper way to do it would have been to vee out the crack and then TIG weld it using cast iron welding rod.  The Vee would give you proper penetration.  The rod comes in the form of pieces about twelve inches long and has a square or round section.  It is simply a piece of grey cast iron.  Welding with cast iron welding rod is popular when restoring atifacts and colour matching is desirable.
Reply:i vee'd it out some, i didn't have any cast rodsStangnetShop Full Of Stuff. Joey
Reply:I have been told by guys older than me you can use a sliver of cast iron broken off another junk casting.  Cast iron welding is sorta like stirring a spoon through porridge.
Reply:thanks lotech, i know in a pinch you can use coathangers for tig and o/a filler, i wouldn't recommend it myself though.StangnetShop Full Of Stuff. Joey
Reply:Originally posted by vipermanz thanks lotech, i know in a pinch you can use coathangers for tig and o/a filler, i wouldn't recommend it myself though.
Reply:Cast iron oxy-acetylene welding rod is available. It looks sorta like a cast ¼"x¼" square stock, but rough like any cast iron. Using cast and oxy-acetylene will give you a good color match for things like restoration parts that need to look as un-repaired as possible. Using the torch helps preheat and post heat.Coat hangers are of a non analyzed metal, meaning that the content is unknown. Welding wire does have an analisis if you request it.
Reply:I tig and stick cast all the time. Filler can be purchased in the Nyrod 99 or 55 for stick and Tig rod in 36" lengths at .060 thickness.Like spoken earlier here you must grind almost all crack out to have proper fix, pre heat and weld small beads, weaving weld puddle just adds a lot of heat to area, peen immediately after weld is laid down, and slow cool part. Pre heat I usually go 400 or so, yet if I'm going to be welding a manifold I go 650 degrees or so. Wire wheel good, first pass may only bring the contaminates up to surface and weld may look terrible, if so grind out weld and re-weld should look good this happens quite often as for the junk usually comes out in the first pass.Later guysJ P Streets Welding LLC
Reply:thanks, i veed it out about 1/8'', heated it to about 500 with torch, and wire wheeled it again before i started the arc. i'll look into getting some cast filler, i don't have any cast pieces that need repair, but you'd be suprised how fast word travels around when you have a welder....StangnetShop Full Of Stuff. Joey