Bar-B-Que grill cast iorn and welding can it

old

Well-known Member
So I have this liner plate from a guys wood stove that is broken. He wants me to fix it be it braze i or weld it. I am thinking if I fire up the bar-b-que grill and heat it up pull it out weld it then put it back in that the weld will be better then if I just weld it. I'll be using Ni-rod
 
After you get thru welding it up make sure you have a large pile of ashes, or something similar, to bury it in, even warm sand. If it is not covered the iron will split(crack) when it cools. Been there done that.
 
I was thinking I would just set it back in the still burning grill and let it cool as the grill slowly goes out and cools
 
I have an antique stove cast iron piece that's broke. I'm planning to leave it at an amish blacksmith shop and see what they can do with it.
 
If it happens to be cast, I prefer to pre heat it,,,,,,,weld it,,,,,,,,,,,,allow for a slowwwwwwwwww gradual cool down. To me placing it back in a grill and allowing a slow cool down could suffice, but I can see where it being buried in sand might allow a more constant better material coverage less hot or cold spot uniform cooling, MAYBE THATS WHY ITS USED??????????????

John T NOT any welding or materials expert, ask a professional welder not me
 
I have a good supply of 99 ni rods that I can sell at half price if you need them. I won't live long enough to use them up on the cast iron welding I do anymore. Bury that piece in hot wood ashes in the grill when done welding.
 
Guess I should have said a charcoal grill not a gas grill LOL. Charcoal tends to cool very slowly
 
The plan is to use a cheap Charcoal grill my son has and just use it to heat the piece up then weld it then set it back in the grill with the top on and walk away from it and not touch it till it goes out
 
I would weld short lengths and then go to the other end or side as far away as possible and do the same, keep from concentrating too much heat in one area. continue until done. Cooling very slowly is a well accepted practice
 
That will work, but you want to make sure that the grill cools VERY slowly afterward and preheating is a very necessary thing as others have said.
 
I figure on putting the pieces in the grill as soon as they stop flaming then wait say 30 minutes or so then do the weld and put it back in the grill and maybe even add some more charcoal so to heats up more and then slowly burns out and that means a slow cool down also
 
You will want to not go far from the heat to weld it. The plate will cool to much that way. I would just put it on a flat block of wood then weld it right in the grill. That way the heat is held in to the plate and then pull the block out after welding to cool buried in the coals with all the ashes piled up on it. Letting it cool slowly.
 
The plan is to have the grill sitting on my welding table in the shop. Maybe just pop the top off the grill and weld it right in the grill it self. Probably tack weld it on one side then flip and do a full weld on the other side then flip and do a weld on the side I tacked.
 
My experience welding cast, if it broke from some unusual event, like being dropped, some kind of accident, then there is a good chance it can be repaired.

But if it failed doing it's normal job, chances are it will break again...

Any way to weld it, then plate it, maybe with stainless and an air gap to keep the heat off the cast?
 

Old,

I have posted on here enough times that you had to

read how to do it. The short version is throw away the

arc weld wire, get some real cast iron rod . Build an oven

out of fire brick , leave a hole in the brick to out in a

weed burner to heat the work. Also need a cover either

asbestos or ceramic fiber fiber is the best. Heat the

whole thing to 1200 (dull red is 900 -1000) reduce flame so

you can weld ,reheat as necessary to maintain temperature.

When done heat to 1500 and slow cool , from 1500 to 1200

must take at least 15 minutes , wrap in fiber at let cool

over nite ,should take about 12 hrs to cool to be comfortable

to touch. The heating to 1500 and holding will normalize

the cast and it will not be brittle.

Look in the web site for pictures of the welding of a

6 hp York engine.

http://www.imageevent.com/gmachine

<p align="center">
Imported%20from%20qu100_4559_jpgqu.jpg


oven with 2 propane burners to heat
casting to 1200 deg F to weld</p>

george
 
If it's a liner, and not the external envelope where the air is sealed, using the Ni-rod you can do well just stitching the pieces together, the nickel is soft enough it should hold together. I think your barbeque idea should work, as well.
 
Do all that just for a simple $35 job that would make the job a $350 job and I do not think the guy would want me to push it that far
 
It is a plate of metal in this case that lines the inside of the wood stove so the outer wall does not get as hot or is touched by the wood/flames. Does the same thing as fire brick just not as heavy or thick and does not hold the heat like fire brick does
 
I tried to weld fireplace andirons once, cold, and the melted rod just rolled off. Somebody told me that cast that has been that hot can"t be welded. I"d fab a replacement out of steel.
 
Well I did weld it up today. Does not look real good but it is now in one piece
 
(quoted from post at 17:51:25 12/01/15) I tried to weld fireplace andirons once, cold, and the melted rod just rolled off. Somebody told me that cast that has been that hot can"t be welded. I"d fab a replacement out of steel.
Somebody was wrong, but you need to preheat cast iron to weld it, and of course you need to use a Ni-rod or cast rod.
 

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