Spring Steel Wire65mn 60si2mna 55crsi SAE9254V 50crva

Quick DetailsSteel Grade: 65mn 60si2mna 55crsi(SAE9254V) 50crvaStandard: AISI, ASTM, BS, DIN, JISWire Gauge: 0.5mm-10mmPlace of Origin: Henan, China (Mainland)Application: ManufacturingAlloy Or Not: Is AlloySpecial Use: Spring steelModel Number: 65mn 60si2mna 55crsi(SAE9254V) 50crvaBrand Name: Henan FriendProduct name: super supplier of high carbon spring steel wireKey word: Compression spring orTorsion springSurface: brightMaterial: 65mn 60si2mna 55crsi(SAE9254V) 50crvaTensile strength: 1340mpa-2230mpaUsage: Valve springs, valve springs, clutch springs, coil springs, spring rails, car springs, etc.Certificate: ISO 9001:2008Package: in coilDiameter: 0.5mm-10mmItem name: spring wirePackaging & DeliveryPackaging Details: oil-quenching spring steel wire Packing in coil with net weight 100-800kg/coilDelivery Detail: Shipped in 7 days after paymentFirst, the product brief:Spring steel wire refers to the steel in the quenched and tempered state of elasticity, and specifically for the manufacture of spring and elastic components of steel. The elasticity of the steel depends on its ability to resiliently deform, ie, within the specified range, the resilient deformation forces it to a certain load and do not exhibit permanent deformation after the load is removed. Spring steel wire should have excellent comprehensive performance, such as mechanical properties (especially the elastic limit, strength limit, the yield ratio), the performance of anti-elastic reduction (also known as anti-elastic properties, also known as anti-relaxation properties), fatigue performance, hardenability , Physical and chemical properties (heat resistance, low temperature resistance, oxidation resistance, corrosion resistance, etc.). In order to meet these performance requirements, spring steel wire has excellent metallurgical quality (high purity and uniformity), good surface quality (strict control of surface defects and decarburization), precise shape and size. Performance requirements Spring in shock, vibration or long-term use of cross-stress, so the requirements of spring steel wire has high tensile strength, elastic limit, high fatigue strength. In the process requirements of the spring steel wire has a certain hardenability, not easy to decarburization, surface quality and good carbon spring steel that is carbon content of WC in the range of 0.6% -0.9% quality carbon structural steel. Alloy spring steel wire is mainly silicon-manganese steel, their carbon content is slightly lower, mainly by increasing the silicon content Wsi to improve performance; in addition to Ge, tungsten, vanadium alloy spring steel wire. In recent years, combined with Chinese resources, and in accordance with the requirements of new technologies for automobile and tractor design, new steel grades with elements such as boron, niobium and molybdenum added on the basis of Si-Mn steel have been developed to prolong the service life of springs and improve the quality of springs . Heat treatment of spring steel wire requires a higher strength and fatigue limit, usually in the quenching + tempering in the state of use, in order to obtain a higher elastic limit. Heat treatment process technology on the inherent quality of the spring has a crucial impact. Therefore, how to further improve the fatigue life of the spring, to be further studied, especially the chemical surface modification heat treatment, shot peening and so on have an important impact on spring fatigue life. To further strengthen the valve spring surface strength, increase the compressive stress, improve fatigue life, valve spring forming, to further through the nitriding, low temperature liquid carbonitriding or sulfur nitriding treatment, and then by shot peening. For example, Japan's f4mm si-cr oil quenched steel wire by 450 ℃ × 4.5h low-temperature carbonitriding and by 400 ℃ × 15min tempering temperature comparison, the fatigue limit can be increased 240mpa. Nitrogen infiltration not only eliminates the adverse effects of decarburization, but also increases the residual compressive stress, while the high temperature strength of the valve spring by nitriding and cryogenic liquid carbonitriding is improved by 0.2% at 150 ° C 0.5%), 250 ℃ deformation of 0.56%, increased the valve spring thermal stability and anti-relaxation stability, but the nitriding and liquid carbonitriding time should be strictly controlled, otherwise it will form a network of sulfides And network nitride, but will reduce its fatigue strength.Spring steel wire Uses:Spring wire is mainly used in locomotives, vehicles, automobiles, tractors, aircraft and a variety of coil spring spring.Hot forming spring heat treatment diameter or plate thickness greater than 10-15mm large spring, multi-purpose hot-rolled wire drawn wire rod or steel plate made of.Processing and heat treatment: the first spring steel wire heated to a temperature higher than the normal quenching temperature of 50-80 ℃ under the conditions of hot-rolled forming, and then quenched in the tempering tempering, to obtain excellent flexibility and fatigue strength of the tempering sorbite. Spring steel wire quenching heating should be used with less oxygen or no oxidation equipment such as salt bath furnace, protective atmosphere furnace, to prevent oxidation decarburization.Spring steel wire after heat treatment should also be shot peening, strengthen the surface, resulting in residual compressive stress, improve fatigue strength.Hot-rolled spring steel wire used in the process are: flat steel cut -> heat bending forming after heat quenching + tempering + shot peening -> packaging., Cold forming spring heat treatment diameter of less than 8mm of the spring, cold-rolled steel wire commonly used cold-rolled forming. Cold-drawn steel wire manufacturing process and follow-up heat treatment, mainly in the following three categories:① lead bath cold drawn steel wire drawing the first three consecutive wire drawing, the total deformation of 50%, followed by heating to Ac3 above the temperature of its austenitizing, followed by 450-550 ℃ lead bath in the isothermal treatment, Body into sorbite tissue. Yield strength of 1600Mpa, cold roll forming, annealing at 200-300 ℃ stress can be.② oil quenching and tempering steel wire drawing to size, the oil quenching and tempering. The strength of such wire is inferior to that of lead-treated steel wire, but the performance is uniform and the cost is low. After cold roll forming, a stress-relieving treatment is performed.③ annealed steel wire drawing the wire to the required size, and then annealing. After the softening of the cold-rolled steel wire forming, subject to quenching after tempering in the temperature to get the required mechanical properties. Alloy elements in the spring wire in the main role is to improve the mechanical properties, improve process performance and to give some special properties (such as high temperature, corrosion resistance) and so on.Wire codes and steel grades corresponding relationship