| 摘要 |
PURPOSE:To improve free-cutting property without deteriorating sag resistance, by adding proper amounts of S, Te, Pb, Ca, etc., to an N-containing high-Si spring steel with a specific composition. CONSTITUTION:The spring steel has a composition consisting of, by weight, 0.40-0.70% C, 1.00-2.50% Si, 0.50-2.00% Mn, 0.012-0.030% N, one or more kinds among 0.03-0.40% S, 0.001-0.15% Te, 0.03-0.20% Pb, and 0.001-0.050% Ca, and the balance Fe with impurity elements and further containing, if necessary, either or both of 0.20-1.0% Cr and/or 0.03-0.50% Nb and 0.03-0.50% V. This steel has superior free-cutting property, sag resistance, and durability.
|
