Effects of Welding Temperature on the Structure and Property of Welding-mend Zone of Grey Iron
The effects of a variet welding temperature on the structure and property of welding mend zone of grey iron (HT250) plank is tested under produce condition using mutti alloying cast iron homogeneous are cold welding electrode.The results shows that on chill welding mend zone can be obtained by the biger welding electric current and continuous welding at 200℃.The structure of welding zone is composed of pealite and a few ferrite and fine flake graphit the hardness is 176 HB for the welding zone and 198 HB for the semimelting zone.Moreove the welding mend zone has high resistance of crack and exellent machinability and be satisfied with welding cylinder typical iron casting.