| 摘要 |
PROBLEM TO BE SOLVED: To produce a high carbon steel wire having high strength and excellent in longitudinal cracking resistance, to produce steel for the high carbon steel wire and to provide a method for producing the steel. SOLUTION: This high carbon steel wire contains, by weight, 0.65 to 1.2% C, 0.1 to 2.0% Si, 0.2 to 2.0% Mn, and Fe as essential components, the main phase is formed of pearlite, and the volume ratio of ferrite in the surface layer part to a depth of 50μm from the surface is <=0.4%. Moreover, by incorporating 0.0003 to 0.0050% B, <=0.030% Ti, <=0.0050% N and 0.03<=B/(Ti/3.43-N)<=5.0, by an ordinary steel wire producing method, the amt. of ferrite in the surface layer part can be controlled to <=0.40%. Since ferrite in the surface layer part causes longitudinal cracking, by controlling its amt. to <=0.40%, excellent longitudinal cracking resistance can be obtd.
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