BAINITE ROD WIRE OR STEEL WIRE FOR WIRE DRAWING AND PROCESS FOR PRODUCING THE SAME

摘要

A bainite rod wire or steel wire having an excellent workability in wire drawing and a process for producing the same. The wire contains on the weight basis 0.70-1.20 % of carbon, 0.30-0.90 % of manganese and 0.15-1.00 % of silicon; at least either 0.006-0.100 % of aluminum or 0.01-0.35 % of titanium as the alloying component; if necessary 0.10-0.50 % of chromium; not more than 0.02 % of phosphorus and not more than 0.01 % of sulfur; and the balance consisting of iron and inevitable impurities. Further it has a tensile strength and a drawing rate as defined by the following formulae (1) and (2), respectively (1): TS </= 85x(C)+60; (2): RA >/= -0.875x(TS)+158; wherein C represents carbon content (wt%), TS represents tensile strength (kgf/mm<2>), and RA represents drawing rate (%).