汽车钢板弹簧是起减震作用的大型荷重弹簧。在非对称交变弯曲负荷作用下,失效的主要形式是疲劳损坏,因此要求它具有较高的疲劳极限。60Si_2Mn钢广泛用于汽车钢板弹簧,因为它具有良好的淬透性、较高的强度和屈强比。其化学成分及原始组织见表1;临界点和马氏体点见表2;CCT曲线示于图1。 Automotive leaf spring is a large load-bearing spring load-damping effect. Under the asymmetric alternating bending load, the main form of failure is fatigue failure, so it is required to have a higher fatigue limit. 60Si_2Mn steel is widely used in automotive leaf springs because of its good hardenability, high strength and yield ratio. The chemical composition and the original organization shown in Table 1; critical point and martensite point in Table 2; CCT curve shown in Figure 1.