Springs are used under impact, vibration or long-term stress, so spring steel is required to have high tensile strength, elastic limit and high fatigue strength. In the process, it is required that the spring steel has certain hardenability, non-decarburization, good surface quality, and the like, and carbon spring steel, that is, high-quality carbon structural steel having a carbon content WC in the range of 0.6%-0.9%. Alloy spring steel is mainly silicon-manganese steel, their carbon content is slightly lower, mainly by increasing the silicon content Wsi to improve performance; in addition, alloy spring steel of tantalum, tungsten and vanadium. In recent years, combined with Chinese resources, and based on the requirements of new technologies for automobiles and tractors, we have developed new steel grades that incorporate elements such as boron, niobium and molybdenum on silicon-manganese steel, prolonging the service life of springs and improving the quality of springs. .
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