بهينه سازي پارامترهاي مؤثر بر جوشكاري ورق هاي فولادي كم كربن و كم سيليسيم مورد استفاده در ساخت وان گالوانيزه گرم

Optimization of Effective Parameters in Welding of Low Carbon & Low Silicon Steel.Plates in Hot-Dip Galvanizing Kettle

Galvanizing kettle is one of the main components of hot dip galvanizing process. Welding is the final stage in galvanizing kettle fabrication. In the persent research the effect of various welding parameters such as bevel pattern and chemical composition of filler metal on mechanical properties, microstructure and corrosion resistance of welded galvanized steel were investigated. Results showed that symmetry bevel pattern is more effective than the non-symmetry one in developing desired properties in welding zone. Although both patterns developed acceptable mechanical properties in welded coupons. NDT results confirmed that welding zone is free from defects such as porosity, inclusion trapping, lack of penetration and etc. Various tests on the electrode type showed Nilsil electrode is more effective than AMA 1531 and 2000 electrodes in producing sound joints. Corrosion tests showed that silicon is the most detrimental element on corrosion resistance of welded coupons.