| 摘要 |
PURPOSE: A flux-cored wire is provided to reduce contraction stress caused by solidification and restrict high temperature cracks in a welded portion by maintaining the ratio of austenite forming elements and ferrite forming elements in a specific range. CONSTITUTION: A flux-cored wire(1) comprises flux charged in a steel outer sheath. The flux-cored wire comprises C(Carbon) of 0.02-0.08wt.%, Si(Silicon) of 0.10-1.45wt.%, Mn(Manganese) of 1.7-4.0wt.%, Ti(Titanium) of 0.05-1.00wt.%, TiO2(Titanium Dioxide) of 1.0-8.0wt.%, Al(Aluminum) of 0.20-1.50wt.%, Al2O3(Alumina) of 0.05-1.0wt.%, B(Boron) of 0.003-0.02wt.%, N(Nitrogen) of 0.010-0.035wt.%, Ni(Nickel) of 3.0wt.% or less(including 0wt.%), and Cu(Copper) of 3.0wt.% or less(including 0wt.%). |
