Can cast iron be welded?
2021-04-30
Cast iron can be welded.
At present, many cast iron parts, such as cast iron shell, box, base and other defects such as crack fracture wear, can be repaired by cast iron welding process.
1.For some cast iron parts appear wear, scratches, etc., suitable for surfacing, you can try to use Z308 or Z408 for cold welding surfacing, if the working face needs surfacing, should avoid welding fusion line in advance, to avoid processing difficulties.
2.For crack of cast iron parts, such as fracture, need the position of the welding strength, Suggestions of MG289 or MG210 cast iron welding material (note that this is not a universal welding material, MG and universal MAGNA are two brands, those who mix with, all is fake, this kind of welding material welding performance is very good, smooth welding, forming good, high strength, crack resistance performance is good,The average welder can handle it very well.Recommend to find tianjin yingyuan, do not covet cheap to buy inferior fake goods.
3.The simplest welding method for cast iron, use MG289 electrode to easily solve the crack damage problem of cast iron parts.At present, large and small cast iron parts are numerous in the machinery industry, and the defects such as cracking, corrosion, wear, scratch, fracture and loss often appear in the use of cast iron parts.With the following cast iron welding method, you can easily solve these problems, to avoid the loss of replacement parts.
Cold welding cast iron, without preheating, the process is relatively simple.The following MG289 cast iron electrode as an example, detailed elaboration of cast iron welding process and matters needing attention.
If there are cracks in cast iron parts, it is necessary to use an Angle grinder to thoroughly clean the cracks before welding and grind out the cracks for welding.
If there is oil on the surface of cast iron parts, it is necessary to barbecue with flame before welding. The barbecue time can be controlled freely to ensure that the welding area and the surface are oil-free.
Direct welding with MG289 electrode, low current.
In the welding process, control the temperature, must not be eager to achieve, to intermittent welding.
In the welding process, hammer the weld bead to release residual stress and avoid stress accumulation causing component cracking.
After welding, it can be installed and used directly without any treatment.
Special attention: cast iron welding is relatively sensitive, improper selection of welding materials or improper process, it is easy to cause workpiece cracking, crack extension, or even irreparable, before determining the welding process, it is recommended not to take the workpiece to do welding experiment with unknown electrode.
