HSLA CAST STEEL FOR SLAG POT HAVING HIGH ELONGATION IN HIGH TEMPERATURE

摘要

The present invention relates to a steel for slag pot having excellent elongation at high temperature, and by controlling the steel component in an appropriate range, while replacing the C-Mn cast steel, such as SC previously used as a slag pot, while maintaining the same strength as compared to the conventional The purpose of the present invention is to provide an HLSA cast steel having excellent elongation at high temperature with low cracking rate. The present invention for achieving the above object by weight% C: 0.09 ~ 0.25%, Mn: 0.6 ~ 1.5%, P: 0.025% or less, S: 0.025% or less, Si: 0.8% or less, rare earth elements (REM): Cast iron for slag pot excellent in elongation at high temperature characterized by containing 0.1 to 1.0% and consisting of remaining Fe and unavoidable impurity is made into the summary. The present invention design HLSA cast steel with excellent elongation at high temperature by appropriately controlling the steel components, and by applying it to the slag pot to reduce the occurrence of cracks in the slag width to extend the service life, thereby reducing the investment cost and repair cost Can be obtained.;Slag Pot, Rare Earth, REM, Strength, Elongation, HSLA