| 摘要 |
PROBLEM TO BE SOLVED: To provide a ferritic stainless steel sheet, which can be punched or sheared without forming burrs, and to provide a manufacturing method therefor. SOLUTION: A slab has a composition including 0.0030 to 0.012 mass% of C, 0.13 mass% or less of Si, 0.25 mass% or less of Mn, 0.04 mass% or less of P, 0.005 mass% or less of S, 0.06 mass% or less of Al, 0.0030 to 0.012 mass% of N, 20.5 to 23.5 mass% of Cr, 0.3 to 0.6 mass% of Cu, 0.5 mass% or less of Ni, 0.3 to 0.5 mass% of Nb, 0.05 to 0.15 mass% of Ti, and the balance Fe with unavoidable impurities. The manufacturing method includes the steps of: hot-rolling the slab having the above composition at a finishing temperature of 900°C or higher and at a winding temperature of 400 to 550°C; softening the obtained hot-rolled steel plate; further pickling it; and subsequently cold-rolling the steel plate. COPYRIGHT: (C)2009,JPO&INPIT |
