HIGH-CARBON STEEL WIRE HAVING EXCELLENT DRAWABILITY AND FATIGUE PROPERTIES AFTER DRAWING

摘要

A fine wire after rolling inclusions , when fresh, is very low even in the Monophonic strict application, after the fresh blood also excellent characteristics as a high-carbon wire rod of high performance , with the composition given above components 0.5 minor axis L direction shown in the cross-section wire , a long diameter 1.0 above, the circle equivalent diameter is referred to as an oxide-based non-metallic inclusions less than 1 (the " target size of inclusions " be ) from , (% SiO ₂ ) = 40 to 95%, (% CaO) = 0.5 to 30%, (% Al ₂ O ₃ ) = 0.5 to 30%, (% MgO) = 0.5 to 20%, (% MnO) = 0.5 to 10% , satisfies the above , and (% Na) = 0.2 to 7%, (% F) = 0.17 to 8% (hereinafter referred to as the " target composition of inclusions ") in the number ratio of inclusions satisfying the composition of inclusions destination number / size 100 the number of inclusions in the target is characterized in that less than 80%.