Welding cast iron?
Posted April 29, 2010 - 08:49 AM
Posted April 29, 2010 - 08:55 AM
Posted April 29, 2010 - 09:27 AM
Posted April 29, 2010 - 10:59 AM
I forget what kind of rod has to be used, but I know the process involve pre-heating with a torch, and then slowly cooling it after the weld with the torch. Thats done to prevent cracking.
And I use Ni-rod ( spelling ? ) for welding cast.
Posted April 29, 2010 - 12:39 PM
Grind V into the weld area as usual. Ni rod flows really well as it penetrates, but if there are contaminants, & you see blister holes in the weld, grind out & re-weld. Almost always, the 2nd weld is clean, as the 1st weld burned up the crud. This part should weld good, as it won't be soaked in oil like an engine block. With any part that has been around oil/grease, it is best to put the part in a fire before attempting welding to raise the oils from the metal.
- IamSherwood said thank you
Posted April 29, 2010 - 01:09 PM
Posted April 29, 2010 - 02:10 PM
Posted April 29, 2010 - 02:16 PM
George, stainless works with cast iron too! Main thing is clean, clean, clean, then heat, weld, heat weld, heat, then sloooow cool. Likely need around 110 to 120 amps, at least that's with stick. Never used stainless in my MIG welders.
I agree with Daniel. Oh and stainless steel works good in the mig.
Posted May 02, 2010 - 02:39 PM
High nickel content is the key with iron. It also works well on very hard steel, like farm disks, that wants to crystalize with the heat.
I use 309/316 on mild steel too, both with stick and mig. Good stuff! Run it with AC.
Posted May 02, 2010 - 03:11 PM
I used to weld cast iron bailer needles back together on a regular basis.
Yep, broke a set of those needles before my Dad told me to reset the tie mechanism. We used to custom square bale all over the county MANY years ago, before roll balers came along. My first few solo outings with the baler were interesting! LOL
Posted May 04, 2010 - 03:03 PM
Posted January 14, 2011 - 12:22 PM
cast iron stick rods, there are 2 kinds of rods, one is soft & can be machined, the other is hard & will
eat the point right off of a drill bit!
Posted January 14, 2011 - 03:26 PM
Posted January 14, 2011 - 03:34 PM
Posted January 17, 2011 - 04:24 PM