| 摘要 |
<p>PURPOSE: A high-strength and high-ductility hot rolled sheet with excellent corrosion resistance and manufacturing method thereof are provided to extend the lifespan of a material, denitrication and desulfurization facilities, a boiler pipe and peripheral devices and reduce weight of facilities through enhancement of strength. CONSTITUTION: A high-ductility hot rolled sheet with excellent corrosion resistance C of 0.06~0.08 weight%, Si of 0.3~0.8 weight%, Mn of 0.3~0.6 weight%, S of 0.02 weight% or less, P of 0.02 weight% or less, Al of 0.01~0.1 weight%, Mo of 0.05~0.2 weight%, Nb of 0.04~0.08 weight%, Fe and other inevitable impurities. The hot rolled sheet is below 110mg/cm^2/hr in corrosion reduction to sulfuric-acid 50volume% solution. The hot rolled sheet is below 30 mg/cm^2/hr in sulfuric acid-hydrochloric acid complex corrosion reduction to sulfuric-acid 16.9 volume%+hydrochloric-acid 0.35 volume% solution.</p> |
