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提高五金弹簧的质量生产方式
文章来源:http://www.sdzbthc.com/ 发布时间:2021-12-07 浏览次数:
弹簧形变热处理--将钢的变形强化与热处理强化两者结合起来,以进一步提高钢的强度和韧性。形变热处理有高中低温之分。高温形变热处理是在稳远的奥氏体状态下产生形变后立即淬火,也可与锻造或热轧结合起来,即热成型后立即淬火。形变热处理己应用于汽车板簧生产中。
Spring thermomechanical treatment -- the combination of deformation strengthening and heat treatment strengthening of steel to further improve the strength and toughness of steel. Thermomechanical treatment can be divided into high, medium and low temperature. High temperature thermomechanical treatment is quenching immediately after deformation in the stable austenite state. It can also be combined with forging or hot rolling, that is, quenching immediately after hot forming. Thermomechanical treatment has been used in the production of automobile leaf spring.
弹簧的等温淬火--对于直径较小或透透性足够的弹簧可采用等温淬火,它不仅能减少变形,而且还能提高强韧性,在等温淬火后最好再进行一次回火,可提高弹性极限,回火温度与等温淬火温度相同。
Isothermal quenching of spring -- for springs with small diameter or sufficient permeability, isothermal quenching can be adopted, which can not only reduce deformation, but also improve strength and toughness. It is best to temper again after isothermal quenching to improve the elastic limit. The tempering temperature is the same as that of isothermal quenching.
扭转弹簧
弹簧的松弛处理--弹簧长时间在外力作用下工作,由于应力松弛的结果会产生微量的永久(塑性)变形,特别是高温工作的弹簧,在高温下应力松弛现象更为严重,使弹簧的精度降低,这对于一般精密弹簧是不允许的。因此,这类弹簧在淬火,回火后应进行松弛处理--对弹簧预先加载荷,使其变形量超过弹簧工作时可能产生的变形量。然后在高于工作温度20C的条件下加热,保温8-24h。
Relaxation treatment of spring - the spring works under the action of external force for a long time. As a result of stress relaxation, a small amount of permanent (plastic) deformation will be produced. Especially for the spring working at high temperature, the stress relaxation phenomenon is more serious at high temperature, which reduces the accuracy of the spring, which is not allowed for general precision springs. Therefore, this kind of spring should be relaxed after quenching and tempering - pre load the spring to make its deformation exceed the deformation that may occur when the spring works. Then heat it under the condition of 20c higher than the working temperature for 8-24h.
低温碳氮共渗--采用回火与低温碳氮共渗(软氮化)相结合的工艺,能显着提高弹簧的疲劳寿命及耐蚀性,此工艺多用于卷簧。
Low temperature carbonitriding -- the combination of tempering and low temperature carbonitriding (soft nitriding) can significantly improve the fatigue life and corrosion resistance of springs. This process is mostly used for coil springs.
喷丸处理--划痕折叠氧化脱碳等表面缺陷往往会成为弹簧工作时应力集中的地方和疲劳断裂源。若用细小的钢丸高速喷打弹簧表面,不仅改善弹簧表面质量,提高表面强度,并使表面处于压应力状态,从而提高弹簧疲劳强度和使用寿命。
Surface defects such as shot peening, scratch folding, oxidation and decarburization often become the place of stress concentration and fatigue fracture source when the spring works. If the spring surface is sprayed with fine steel shot at high speed, it will not only improve the spring surface quality and surface strength, but also make the surface in a state of compressive stress, so as to improve the fatigue strength and service life of the spring.