HIGH CARBON STEEL WIRE ROD OR HIGH CARBON STEEL WIRE EXCELLENT IN WIRE DRAWABILITY AND ITS PRODUCTION

摘要

PURPOSE: To produce a high carbon steel wire rod or a high carbon steel wire excellent in wire drawability. ;CONSTITUTION: The high carbon steel wire rod or the high carbon steel wire excellent in wire drawability, which has a composition consisting of, by weight, 0.80-0.90% C, 0.10-1.50% Si, 0.10-1.00% Mn, P, S, and Al limited, respectively, to ≤0.02%, ≤0.01%, and ≤0.003%, and the balance Fe with inevitable impurities and where the upper bainite structure prepared by means of two stage transformation comprises ≥80% by area ratio and a microstructure of ≤ Hv450, is produced. Further, the composition can contain 0.10-1.00% Cr as alloy component. By this method, in this high carbon steel wire rod or the steel wire, wire drawing to a high reduction of area can be done to a greater extent than heretofore, and delamination characteristic can be improved.;COPYRIGHT: (C)1994,JPO&Japio