saldare la ghisa

[eugeniobene]

I press that I am a student, but I preferred to write here rather than in the ing section, as I could find perhaps better answers. if it is not the appropriate section to be moved

if I have to weld together two pieces of cast iron, it is necessary that the welding is made for example by electric arc so that the cooling is sweeter because it could form a structure too fragile, or can a mag be used?

 

[gil]

Hi.
depends on what resistors you want to get and the shape of the piece. provided that cast iron welding is of poor quality (compared to steel), mag welding should allow better results because it melts a greater amount of material (if the material has relatively large thickness).

the problem is in preheating and subsequent cooling, because as you rightly notice, variations of temperatures too rough could ruin the piece.

ps: you have to use specific welding wire or ellettrodes.

 

[SHIREN]

I press that I am a student, but I preferred to write here rather than in the ing section,
?

and you did well:biggrin:

as I could have found perhaps better answers.

in this sez you find only users who do dirty work

if it is not the appropriate section to be moved
?

you decide:biggrin:

if I have to weld together two pieces of cast iron, it is necessary that the welding is made for example by electric arc so that the cooling is sweeter because it could form a structure too fragile, or can a mag be used?

welding the cast iron never liked me or more precisely I never had the certainty that the piece has the same characteristics before welding
in the possible I have always sent to the cast iron castings which should have been subjected to welding
But sometimes we have to
then
after adequate bevel smudge on the lembi to be welded
they are approached in order to obtain the previous perimeter geometry
with a reed that for obsicutting the two welded lembies are overheated until obtaining
a red cherry color
after welding with special cast iron electrodes
that you will be advised by the dealer
However these electrodes have a percentage of chromium nickel
in the sense that they are stainless steel eletrodes that in a certain way
resist welding contractions
in the last
if there is a possibility all should be covered with cyanide powder
that would be the residue of coal combustion
Thank you very much

p.s.
If you want to transfer the discussion to the ing area, no prob.

 

[mulder71]

the answer of shiren.

 

[bisogna_rimanere_umili]

Hi.
depends on what resistors you want to get and the shape of the piece. the welding on cast iron is however of poor quality (compared to that on steel), la saldatura mag should allow better results because it melts more material (if the material has relatively large thickness).

the problem is in preheating and subsequent cooling, because as you rightly notice, variations of temperatures too rough could ruin the piece.

ps: you have to use specific welding wire or ellettrodes.

welding mag or mig?
I've never heard the mag, in the mig you use inert gas. .
that I know (to say/studied) "the only" weldable cast iron is the spheroidal one and however it serves " the handle", if it heats and cools quickly everything becomes fragile (white cast iron) in addition to the inevitable internal tensions. . .

 

[gil]

mig and mag are similar welding processes, which employ the same welding machine.
the difference is that mag uses active gas, usually carbon dioxide mixtures.
http://www.neweldtechnology.it/index.php?option=com_content&view=article&id=30&itemid=139

 

[stefanobruno]

then
after adequate bevel smudge on the lembi to be welded
they are approached in order to obtain the previous perimeter geometry
with a reed that for obsicutting the two welded lembies are overheated until obtaining
a red cherry color
after welding with special cast iron electrodes
that you will be advised by the dealer
However these electrodes have a percentage of chromium nickel
in the sense that they are stainless steel eletrodes that in a certain way
resist welding contractions
in the last
if there is a possibility all should be covered with cyanide powder
that would be the residue of coal combustion

It has nothing to do with the subject, but I can't resist.
When I read your surgeries, I'm really excited.
I like this skill and availability, I like it too.

Thank you very much

Your greeting should make it a widespread thought.
:36_1_4:
I'm gonna go get the tissues.

Thank you very much.

 

[SHIREN]

It has nothing to do with the subject, but I can't resist.
When I read your surgeries, I'm really excited.
I like this skill and availability, I like it too.



Your greeting should make it a widespread thought.
:36_1_4:
I'm gonna go get the tissues.

Thank you very much.

......... .
I wish you good
All I can do is thank you for the compliments to my person
I take advantage of your post to "punish" complements to all "stefanobruno" or "shiren"
that belong to the forum of cad3d.it
that in everyday life they face this "window" and share their own skills their experiences
with so much availability
thank you so much to you and all the others

I'm gonna go get the tissues.
.

I need a couple of tablecloths
of the big ones
:36_1_4::36_1_4:

 

[SHIREN]

"the only" weldable cast iron is the spheroidal one and still serves "the handle", if it heats and cools quickly everything becomes fragile (white cast) in addition to inevitable internal tensions. . .

Hi.
my experience quoted for cast iron welding
it concerns periods in which the cast irons with a perlitic or spheroidal structure, perhaps we did not even know its existence
or at least it was a production process that in Italy was at the beginning
to the max working on very similar leagues and on English or American licenses
living in an area of the series (open the window and look at the sea)
it was natural that I drank in the "naval"
and was a daily practice weld boilers-reducers-coolers etc etc etc.
that at most could be in g22 (but already was na big thing)
the true prob was cooling after welding
using very hot carbon cyanide powder
and wait for cooling
Thank you very much

 

[bisogna_rimanere_umili]

......... .
I wish you good
All I can do is thank you for the compliments to my person
I take advantage of your post to "punish" complements to all "stefanobruno" or "shiren"
that belong to the forum of cad3d.it
that in everyday life they face this "window" and share their own skills their experiences
with so much availability
thank you so much to you and all the others


I need a couple of tablecloths
of the big ones
:36_1_4::36_1_4:

I also associate myself with the deserved praises, and I remain enchanted in reading the "favola" that
accompanied the explanation. . .

 

[stefanobruno]

shiren melts cast iron and poetry.

(sing)