how to weld the cast iron?

[hortone]

I need to weld a cast iron plate that cracked.
the plate is one of those from fireplace, so that it must hold to the heat of the fire.
How do I do to weld the crack?

 

[MFT]

I need to weld a cast iron plate that cracked.
the plate is one of those from fireplace, so that it must hold to the heat of the fire.
How do I do to weld the crack?

Hi.

I think there are cast iron electrodes to weld, moreover it is necessary to prepare the piece (heat it) and to cool it slowly otherwise it cracks.

 

[Ezio Olivato]

there are electrodes for cast iron, it must be preheated and cooled in sand slowly.

 

[hortone]

...we hope to catch the right electrodes. . .
of heating and cooling with sand I had heard about it... But would we have more types of electrodes? which will resist to high temperatures?
...and I'll write the arduous judgment!

:biggrin:

 

[MFT]

with a simple internet search

 

[mtbnicola]

there are the appropriate electrodes,cmq remains very difficult to weld the cast iron and the result is not always optimal.You can assess the idea of blocking the two parts between them with 2 plates plugged and blocked with screws...

 

[Er Presidente]

brazing with silver based electrode, see castolin, better if coated.

p.s.: stop the crack with a hole, first.

 

[meccanicamg]

Nice disaster weld the cast iron. definitely make a rear reinforcement is the best solution.

then for the aesthetic factor you could use electrodes coated for cast iron and electrodes coated basic for high carbon steels. I usually use the second cast iron as sometimes I repair cast iron bites and it takes a lot of tenacity.

definitely need to "enlarge" the crack in order to add different intake material but not making it warm too much. Moreover the preheat is very useful to decrease the redness of carbon grain especially after welding with very gradual cooling.

There are also electrodes for wear-resistant carryovers that are special bases that are used to bring back material on cylinder heads. - Surely they'd be better.

do some tests and possibly give the cards and characteristics of the electrodes so you can evaluate before buying.

 

[Meccbell]

given the object I would say to throw away everything and buy it new.
risks to spend more in electrodes than for the cost of the spare. :frown:

the castolin type alloy option suggested by the president (obsessive, we kiss the hands...:biggrin is practicable only if the plate in question does not reach excessively high temperatures. otherwise with time the brazing alloy "cuoce" and amen.

even because, apart from the fact that if we are in the presence of stress due to the heat the risk is that however you break again, after a little time, because of the tensions of the expansion, for personal experience I say that these "domestic" objects are often fused in cast iron alloys quite "bizzarre", since the first specific to satisfy is the grey (leggasi, where we find the braids at lower cost
result is often found with materials that are apparently compact and homogeneous, but that at the time of soldering "fry" which is a pleasure, with imaginable consequences on the final result.

 

[meccanicamg]

Unfortunately it is a psalmous truth that said maccbell, they are strange alloys often, with high aluminum content or better it is zama that throw in the cast iron....strano effect yet they do it...so when you salt feel the electrode unform and you see that you make the hole and the intake material fades in nothing because it does not cola.

 

[Er Presidente]

the castolin type alloy option suggested by the president (obsessive, we kiss the hands...:biggrin is practicable only if the plate in question does not reach excessively high temperatures. otherwise with time the brazing alloy "cuoce" and amen.
... often are melted in cast iron alloys quite "bizarre". . .

Not everyone can find the bases of the fire engines thrown!


p.s.: you've seen a more elegant way to say that I said a caxxata!
:biggrin:

 

[SHIREN]

I need to weld a cast iron plate that cracked.
the plate is one of those from fireplace, so that it must hold to the heat of the fire.
How do I do to weld the crack?

Hi.
Maybe a system is there
I do not know the width of the clique
Anyway
should create a cyanphrine (><) to soothe the lembi
with the barrel you have to heat them until reaching a red color cherry
then also pass a basic electrode (citobasic)
I've always gone well (more or less)
in the possible you should cool it slowly
Usually it is used to thread the welded under the chin powder
that would be the slag of the chimney wood compost
Thank you very much

 

[meccanicamg]

Hi.
Maybe a system is there
I do not know the width of the clique
Anyway
should create a cyanphrine (><) to soothe the lembi
with the barrel you have to heat them until reaching a red color cherry
then also pass a basic electrode (citobasic)
I've always gone well (more or less)
in the possible you should cool it slowly
Usually it is used to thread the welded under the chin powder
that would be the slag of the chimney wood compost
Thank you very much

What did I say? :biggrin:

 

[hortone]

I thought it was less complicated. ! !
I'm going to try to buy the new plate anyway!

Thank you very much to all!
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