特大型轴承(如轧钢机和其它重型机械用轴承)在工作过程中,除承受接触应力外,还有较高的冲击负荷作用,一般都用合金渗碳钢制造。其通常的破坏形式是在一定的接触应力和多次重复冲击交替作用下的疲劳剥落。典型的损坏状态如图1。由此可见,特大型轴承渗碳钢的接触疲劳抗力对该钢种制轴承寿命起着重要的作用。 Extra large bearings (such as rolling mills and other heavy machinery bearings) in the course of their work, in addition to bear the contact stress, but also a higher impact load, are generally made of alloy carburized steel. The usual form of damage is a certain degree of contact stress and multiple repeated impact fatigue spalling. A typical state of damage is shown in Figure 1. It can be seen that the contact fatigue resistance of super-large bearing carburized steel plays an important role in the bearing life of this kind of steel.