METHOD FOR PRODUCTION OF STEEL MATERIAL HAVING EXCELLENT SCALE DETACHMENT

摘要

There is provided a steel wire excelling in mechanical descaling performance containing C: 0.05-1.2 mass%, Si: 0.01-0.5 mass%, Mn: 0.1-1.5 mass%, P: no more than 0.02 mass%, S: no more than 0.02 mass%, and N: no more than 0.005 mass%, which is characterized by having a Fe 2 SiO 4 (fayalite) layer in contact with that side of scale formed at the time of hot rolling which faces the steel, said Fe 2 SiO 4 layer being formed immediately on a P-concentrated part that exists at the steel-scale interface and has a maximum value of P concentration no larger than 2.5 mass%.