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一、前言低温淬火就是在钢一到达Acl相变点就进行急冷以提高其旋转弯曲疲劳强度的一种方法。然而,将这种方法用于车轴轮座处,从实用角度进行的研究还不多。在前文中,为了提高车轴轮座处的疲劳强度,曾研究了低温淬火对金相组织、硬度、残余应力、疲劳裂纹极限σw_1和疲劳破坏极限σw_2等的影响。试样采用含碳量为0.35—0.40%的正火碳素结构钢(相当
First, the introduction of low-temperature quenching is reached at the steel Acl transformation point on the quench to improve the bending fatigue strength of a method. However, this method is applied to the wheel seat, from the practical point of view of the study is not much. In the previous article, in order to improve the fatigue strength of the axle seat, the effects of low temperature quenching on microstructure, hardness, residual stress, fatigue crack limit σw_1 and fatigue failure limit σw_2 have been studied. The specimen is made of normal-fired carbon structural steel with a carbon content of 0.35-0.40% (equivalent