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主 营:胎压监测、胎压监测器
4行业动态

Factors affecting the life of automobile leaf spring


For the plate spring has a high elastic limit, the use of the permanent deformation is not easy, and quenching steel to obtain all the martensite, the mechanical properties along the cross-section evenly, the steel can play the maximum elastic limit Come. If the steel contains other non-martensite, its mechanical properties of the heart is low, especially the impact toughness is low, can reduce its elastic limit, yield limit. So the first requirements of the steel has a suitable hardenability, different materials, different hardenability.

China's leaf spring industry is the implementation of the automotive industry standard QCn29035-91, the provisions of fatigue life ≥ 80,000 times as a qualified product, so we use the standard material for the final fatigue life can meet the requirements of the standard, such as the most commonly used materials 60Si2Mn quenching Through the thickness of ≤ 12mm, but ≤ 14mm thick steel plate fatigue life can reach and more than 80,000 times in the organization, in addition to martial arts in addition to a small amount of bainite and insoluble ferrite. Thickness> 14mm steel plate quality is less than 80,000 requirements, in addition to martial arts in the organization there are a lot of bainite and insoluble ferrite, the user of this spring is mostly broken earlier. 50CrVA hardened thickness of ≤ 25mm, used for thick spring. There are many small factories using rail modified materials (65Mn) production leaf spring, low prices, but only 65Mn for small cross-section spring, hardenability is low, the general manufacturers do not use.For the plate spring has a high elastic limit, the use of the permanent deformation is not easy, and quenching steel to obtain all the martensite, the mechanical properties along the cross-section evenly, the steel can play the maximum elastic limit Come. If the steel contains other non-martensite, its mechanical properties of the heart is low, especially the impact toughness is low, can reduce its elastic limit, yield limit. So the first requirements of the steel has a suitable hardenability, different materials, different hardenability.

China's leaf spring industry is the implementation of the automotive industry standard QCn29035-91, the provisions of fatigue life ≥ 80,000 times as a qualified product, so we use the standard material for the final fatigue life can meet the requirements of the standard, such as the most commonly used materials 60Si2Mn quenching Through the thickness of ≤ 12mm, but ≤ 14mm thick steel plate fatigue life can reach and more than 80,000 times in the organization, in addition to martial arts in addition to a small amount of bainite and insoluble ferrite. Thickness> 14mm steel plate quality is less than 80,000 requirements, in addition to martial arts in the organization there are a lot of bainite and insoluble ferrite, the user of this spring is mostly broken earlier. 50CrVA hardened thickness of ≤ 25mm, used for thick spring. There are many small factories using rail modified materials (65Mn) production leaf spring, low prices, but only 65Mn for small cross-section spring, hardenability is low, the general manufacturers do not use.

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