Spring Steel With Good Toughness And Elasticity

There are many classification methods, which can be classified according to chemical composition, use, specification, or processing technology. The spring steel belt is divided into carbon spring steel belt and alloy spring according to its chemical composition. Steel belts and stainless spring steel belts, and their performance characteristics.

The content (mass fraction) of carbon spring steel is generally 0.62%~0.90%. According to its manganese content, it is divided into general manganese content (mass fraction) (0.50%~0.80%), such as 65, 70 spring steel, 85 spring steel And higher manganese content (mass fraction) (0.90%~1.20%), such as 65Mn. At the same time, 65Mn spring steel, No. 65 spring steel and other tool spring steels are commonly used, such as T8A tool spring steel, T9A spring steel and so on.

Alloy spring steel is a steel that is based on carbon spring steel and appropriately adds one or several composite elements to improve the mechanical properties, hardenability and other properties of spring steel to meet the properties required for manufacturing various springs. The basic composition series of alloy spring steel are: silicon-manganese spring steel, such as 60Si2Mn spring steel, silicon-chromium spring steel, such as 55CrSi spring steel, chromium-manganese spring steel, chromium-vanadium spring steel such as 50CrVA spring steel, tungsten-chromium-vanadium spring steel, etc. On the basis of these series, some grades have added alloying elements such as molybdenum, vanadium or boron in order to improve their performance in some aspects.

Compared with the above two spring steels, the main feature of stainless steel spring steel is that it has good corrosion resistance. Generally, it is available in the form of spring steel strips. The spring steel plates need to be flattened with stainless steel spring steel strips. At present, the commonly used stainless steel spring steel grades are SUS301, 420J2, etc. The sus301 stainless steel spring belt can obtain high hardness and high strength through cold processing, and has good toughness and elasticity. 420J2 steel strip can obtain higher hardness and strength after quenching, and has good corrosion resistance at the same time. The above two stainless steel spring steel belts are widely used to make various knives, blades, belt knives, shrapnel, saw blades, and other tools.