열간 압연강의 고온산화에 미치는 전기로제조법, 고로제조법 및 탄소량의 영향

Effect of Arc Furnace Manufacturing Process, Blast Furnace Manufacturing Process, and Carbon Content on High-temperature Oxidation of Hot-rolled Steel between 650 and $900^{\circ}C$

Hot-rolled steel plates of SPHC and SS400 were oxidized at 600, 750 and $900^{\circ}C$ for 2hr in air. With an increase in oxidation temperature, their oxidation rates increased, being accompanied with formation of pores and cracks in the thickened oxide scales that were non-adherent. The SPHC steels that were manufactured by either the arc furnace or the blast furnace displayed similar oxidation rates, indicating that their oxidation rates were insensitive to the manufacturing processes. The medium-carbon SS400 steel displayed a little faster oxidation rates than the low-carbon SS400 steel, indicating that the carbon content did not significantly influence the oxidation rates.