HIGH MANGANESE ALUMINUM COATED STEEL SHEET WITH EXCELLENT CRACK RESISTANCE OF WELDING PART AND METHOD FOR MANUFACTURING SAME

摘要

One aspect of the present invention relates to a high manganese aluminum coated steel sheet with excellent crack resistance, comprising: 0.3-0.9 wt% of carbon (C); 15-30 wt% of manganese (Mn); 0.1-3.0 wt% of silicon (Si); 0.05 wt% or less of phosphorus (P); 0.02 wt% or less of sulfur (S); 0.001-0.05 wt% of nitrogen (N); 0.02-0.10 wt% of niobium (Nb); a steel foundation plate comprising the balance of iron (Fe) and unavoidable impurities; and an aluminum coated layer formed on the steel foundation plate.;COPYRIGHT KIPO 2017