Welding Cast Iron in China
iron foundry in
China, welding cast iron has been widely used. Such as repairing
iron casting defects
or used in welded assembly parts for fabrications.
Welding cast iron is used in various places like housing,
making enclosures, machine forms and bases, and clutch plates etc.
Welding cast iron is a very dedicated works. There are many
important issues that need to be paid attention to.
Firstly, cleaning the cast iron to be welded, then takes place with
the help of a degreaser. When welding a small crack then the
beginning and the ending point of the crack has to be determined
while welding it. A stop hole should also be done of one eight inch
by drilling at each end of the crack, sand paper can be used for
grinding and a magnifying glass is also needed to see the hole done.
The length of the crack has to be grounded by a V shape, taking care
of not going through all the way through the cast iron.
In addition, the temperature is very important to the welding
quality of cast iron. The whole cast iron material should be
pre-heated and to be welded through 500 degree. The ambient
temperature has to be cooled down and it is a very important
procedure in welding. it should be then place on a hot oven. The
temperature should be maintained constantly from fifty to sixty
degree per hour so that the air temperature is reached.
Same method has to be followed when ever there are two pieces to be
cast iron or a crack to be welded. The material gets cool really
soon in open air, so to avoid that it is very important for a welder
to make sure that the materials are pre- heated and cool down
Finally, the welders should always use the right and apt welding
equipments so that welding is done with proper format and also
follow all the rules and regulation of welding cast iron to get the
right weld which will not crack and stay last long.
In China, most of iron foundries
could do the welding works to cast iron in-house. But most of them
just take it as the repairing methods.