You can see the AWS D11.2.
Various kind of cast steel repair method and sample procedure shown on AWS D11.2.
Good luck. Welding gray cast iron is rarely successful, especially groove welds in thick sections. Mechanical repairs, such as Metalock or Lock 'n Stitch type, are a better choice.
Better you than me.
I can think of one possibility...under a clamping or restraining force, as you apply the pre-heat and the part attempts to expand with the increasing heat it will be under compression.
Good Luck.
Have a Great Day, Brent
Thanks Brent,
The problem is the completed weld will be under tension due to the shrinkage stresses during welding pool solidification. Weld is anyway under compression while still hot because of high restraint. Question is how to get compression in weld after cooling?
Thanks
You would have to heat the part where it is NOT broken to expand that material a greater ammount then the welded area will contract.
This is easier in theory than in practice.
"The only difference between theory and practice is that, in theory, there's no difference between theory and practice."
I have to remember that one.
Have a Great Day, Brent
OK Then! Why not just say ..." It is easier to talk about, than to put in practice!"