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, 0.70-1.20% C, 0.15-1.00% Si, 0.30-0.90% Mn, further 0.006-0.100% Al and/or 0.01-0.35% Ti, P and S respectively limited to ≤0.02% and ≤0.01%, 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 also a micro structure of ≤Hv450, is produced. The composition can further contain 0.10-0.50% Cr as alloy component. By this method, the high carbon steel wire rod or high carbon steel wire excellent in wire drawability can be produced and the necessity of intermediate heat treatment in the secondary working stage can be obviated, and remarkable cost reduction, shortening of a term of works, and cost equipment reduction can be attained.;COPYRIGHT: (C)1994,JPO&Japio