Ferritic free-cutting stainless steel bars and wire rods and a method for manufacturing

摘要

PROBLEM TO BE SOLVED: To provide a free-cutting stainless steel wire rod having good manufacturability and capable of obtaining excellent surface accuracy (surface roughness) and excellent resistance to tool wear and corrosion resistance.;SOLUTION: A ferritic free-cutting stainless steel wire rod includes, in mass%, 0.030% or less of C, 1.0% or less of Si, 2.0% or less of Mn, 0.02-0.10% of P, 0.15-0.50% of S, 15.0-20.0% of Cr, 2.0% or less of Ni, 0.005-0.030% of N, and 0.001-0.010% of B, with the balance comprising Fe and unavoidable impurities, and has an intermetallic compound including B and N and having the maximum grain diameter of 0.1-10.0 μm, wherein at least one intermetallic compound is present per 0.1 mm², and the number of intermetallic compounds containing S is at least 5% of the total number of intermetallic compounds.;COPYRIGHT: (C)2013,JPO&INPIT