Welding method for cast iron and pig iron
Cast iron with high carbon content, low plasticity, inhomogeneous microstructure, poor weldability, welding, there is generally the following problems: 1, after welding is easy to produce white tissue, 2 after welding cracks 3, after welding is easy to produce pores in the production of cast iron, therefore, is not as welding materials. Casting defects generally only to repair welding of cast iron and cast iron local failure. Cast iron welding rod arc welding or general use. Casting welding often divided into heat welding method and cold welding method two. Iron welding 1: welding the welding surface polishing, to prevent impurities, make welding more firmly2: after welding, should be put into the lime, so that it slowly coolingAbove is a wise remark of an experienced personPS: forget to say a bit, welding pig iron must choose special pig iron electrode
Cast iron and pig iron are of no use and have no welding value.: iron cast iron ore smelting iron first block of bread, and contains impurities again to smelting, impurities, alloying elements is cast iron. That is to say, pig iron is only raw material of cast iron semi-finished products.
