What are the factors that determine the spring's elasticity?
A high strength, high toughness and high hardenability spring steel material characterized in that the spring steel material contains 0.48% to 0.55% C, 0.17% to 0.37% Si, 0.70% to 1.00% Mn, 0.8% ~ 1.10% Cr, 0.001% to 0.004% B, ≤ 0.35% Ni, ≤ 0.25% Cu, ≤ 0.03% P, ≤ 0.03% S, balance Fe.
The strength and toughness of this type of Handan Steel is comparable to that of 50CrVA. The hardenability is comparable to that of 60CrMnBA, and the high-strength, high-toughness, high-hardness, hardenability spring steel material is economical.
To make a better supplement to the current GB1222-92 spring steel material. The steel material suitable for producing a large section, high-strength elastic element is particularly suitable for manufacturing a steel material having a thickness of ≥20 mm and a ≤36 mm leaf spring. Compared with the prior art, the invention has the advantages of economical chemical composition, wide application range, high strength and toughness, and good hardenability.