How to introduce alloy spring steel:
Alloy spring steel Si Mn 55si2mn
It has high strength, good elasticity and good tempering stability, but it is easy to decarburize and graphitize. The hardenability of steel containing B is obviously improved
The main spring steel has a wide range of applications, and can be used to manufacture various kinds of important springs with medium cross section less than 25mm, such as leaf spring of automobile, tractor, coil spring, etc. 60Si2Mn 55si2mnb 55SiMnVB CR series 50CrVA has excellent hardenability, high tempering stability, low decarburization and graphitization tendency, good comprehensive mechanical properties, certain corrosion resistance, high temperature resistance of springs containing V, Mo, W and other elements; as they are all high-quality steels, their fatigue performance is further improved. It is used to make heavy-duty and large-scale springs (50-60mm) with large load, such as engine valve spring, constant temperature spring Spring of spring hook, crusher, heat-resistant spring, such as boiler safety valve spring, spray nozzle spring, cylinder expansion ring, etc
60CrMnA 60CrMnBA 60CrMnMoA 60Si2CrA 60Si2CrVA
1、 Carbon spring steel (i.e. non alloy spring steel) has low price but poor hardenability. It is suitable for non important spring with small section size, among which SK5, sk7, 65 and 65Mn are most commonly used.
2、 The alloy spring steel can be divided into two categories according to the main alloying elements: Si Mn spring steel and Cr spring steel. The former has higher hardenability than carbon steel, and its price is not very expensive, so it is widely used in all kinds of springs with cross-section size less than 25 mm, and 60Si2Mn is the typical representative; the latter has good hardenability, high comprehensive mechanical properties, and is not easy to decarbonize on the surface of spring, but its price is relatively high. It is generally used for important springs with large section size, and 50CrVA is its typical representative.