| 摘要 |
Provided is a spring steel that contains 0.15-0.40% carbon, 1-3.5% silicon, 0.20-2.0% manganese, 0.05-1.20% chromium, at most 0.030% phosphorus, at most 0.02% sulfur, and at least one of the following: 0.005-0.10% titanium, 0.005-0.05% niobium, and at most 0.25% vanadium. The remainder of said spring steel comprises iron and unavoidable impurities. The carbon equivalent (Ceq 1 ) of the provided spring steel, as calculated by formula (1), is at most 0.55. Ceq 1 = C + 0.108 × Si - 0.067 × Mn + 0.024 × Cr - 0.05 × Ni + 0.074 × V (In the formula (1), each symbol in brackets represents the content (mass%) of the corresponding element.) |
