Because cast iron welding high carbon content , inhomogeneity , low intensity, poor plasticity , belonging to poor weldability of the material , the welding process can easily produceHealth crack ; cooling rate after welding fast, easy to produce white tissue, causing Cutting difficult. Welding andAluminium Welding Wire g of cast iron , to achieve satisfactory results, you must pay attention to "one-third material , seven craft " , not only toSelect the electrode, and the use of suitable welding method is particularly important.We recommend the following welding process, welding and repair welding of cast iron as a reference : 1, first clear the welded parts of the sludge, sand , water, rust and other dirt ; for a long period of high temperature steam iron castings working environment , but alsoTo clear the surface of the carbon layer and the oxide layer is depleted .2, according to the shape of the welded parts , defect type , for open groove , playing pool for the hole and modeling, and other preparatory measures .3 , the need for cold welding of the workpiece, preheated 500-600 ℃ or so, choose the appropriate current , continuous welding , the welding procedure remains the pre-Hot temperatures , immediately after welding powder Aluminum Flux Core Welding Wire insulation materials , allowed Slow cooling , in order to improve their crack resistance and processability . 4, for cold welding workpiece to prevent excessive base metal melting , chilling tendency to reduce and prevent excessive heat concentration , causing too much stress , should beLow current , short arc welding narrow channel ( each bead length is generally No more than 50mm). Immediately after welding, hammering the weld to prevent cracking stress relaxation , the temperature dropped to below 60 ℃ and then welded one .5 , when the attention crater crater fill , to prevent cracking at the closing arc