Year1
- 规格：
- 0.35*300
- 表面：
- 光亮
- 硬度：
- 28-35
Spring steel is the most widely used carbon spring steel, and its production volume is approximately % of the carbon spring steel production. Its strength, hardenability, and tempering resistance are better than those of ordinary spring steel, and its working temperature reaches ℃. Its disadvantage is that it has a greater tendency to decarburize. It is suitable for manufacturing leaf springs with a thickness smaller than that and coil springs with a cross-sectional size smaller than that. It is used in heavy machinery. , railway vehicles, cars, tractors are widely used.
Chemical composition of spring steel
.～. Silicon.～. Manganese.～. Sulfur. Phosphorus. Chromium. Nickel. Copper
Mechanical properties of spring steel
Tensile strength&( )
Strength&()
Length (%)
Facial shrinkage&(%)
High temperature hot rolling, cold drawing + heat treatment,
Spring in impact , vibration or long-term cross stress, so the spring steel is required to have high tensile strength, elastic limit, and high fatigue strength. In terms of technology, spring steel is required to have a certain degree of hardenability, be difficult to decarburize, and have good surface quality. Carbon spring steel is a high-quality carbon structural steel with a carbon content within the range of .%.%.
Spring steel
Characteristics and scope of application
SiMn spring steel is widely used and has slightly higher strength, elasticity and hardenability. It is suitable for making flat springs with larger loads or coil springs with wire diameters below 100 in the railway vehicle and automobile tractor industries. It is also suitable for making heat-resistant springs in non-corrosive media with working temperatures below ℃ and withstanding alternating loads and in Large and important coiled springs operating under high stress.
Hardness hot rolling, cold drawing + heat treatment,
Heat treatment specifications and metallographic structure
Treatment specifications: quenching ℃℃, oil cooling and tempering ℃℃ (special needs, ℃).
Phase structure tempered troostite.
Delivery status Hot-rolled steel is delivered in a heat-treated or non-heat-treated state, and cold-drawn steel is delivered in a heat-treated state.
The shot peening treatment after the spring is made can generate residual compressive stress on the surface of the spring to offset part of the working stress on the surface and inhibit the formation of surface cracks, which can significantly increase the fatigue limit of the spring.
The outstanding advantages of spring steel sheets are good hardenability, in addition, good thermal processing properties, comprehensive mechanical properties, and anti-decarburization properties. Various important springs with large cross-sections, such as large leaf springs and coil springs for automobiles and motorcycles, etc. .
Chemical composition
.~. .~. Manganese.~. Sulfur. Phosphorus. Chromium.~. Nickel. Copper. Vanadium.~
Reed steel sheets have high strength, plasticity and toughness. , better hardenability, lower overheat sensitivity than manganese steel, smaller decarburization tendency than silicon-manganese steel, and greater temper brittleness.
Spring steel sheets are used in the vehicle and tractor industries to make leaf springs with heavier loads and larger stresses and coil springs with larger diameters.
Multiple spring steels use silicon as the main alloy element, which is the alloy element that has the greatest impact on spring resistance. This is mainly due to the strong solid solution strengthening effect of silicon. At the same time, silicon can inhibit the cementite during the tempering process. The crystal nuclei in the steel form and grow, changing the number, size and shape of carbides precipitated during tempering, and improving the tempering stability of the steel.
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