Manufacturing performance requirements of spring steel

The spring is used under impact, vibration or long-term cross stress, so spring steel is required to have high tensile strength, elastic limit, and high fatigue strength. In the process, spring steel is required to have a certain degree of hardenability, not easy to decarburize, and surface quality Good-quality carbon spring steel is a high-quality carbon structural steel with a carbon content of WC in the range of 0.6%-0.9%.

Alloy spring steels are mainly silico-manganese steel grades. Their carbon content is slightly lower, and their performance is mainly improved by increasing the silicon content Wsi; there are also alloy spring steels of 硌, tungsten, and vanadium. In recent years, combined with China’s resources, According to the requirements of new technologies in the design of automobiles and tractors, new steel grades with elements such as boron, niobium and molybdenum have been developed on the basis of silico-manganese steel, which extends the service life of the spring and improves the quality of the spring.