Structural changes occurring in the surface layer as a result of the hardening produced by various variants cyclic loading in high-strength high-quality steel 30KhGSN2A are considered. The sizes of the hardened zone are determined. It is shown that the hardening occurs in the early loading stages and is then followed by a durable state of saturation until failure. The differences in the deformation behavior of the samples and the changes in the parameters of fatigue resistance are analyzed. The influence of the conditions of cyclic loading and of the modes of preliminary heat treatment of the steel on the parameters of fatigue resistance is studied.

中文翻译：

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30KhGSN2A钢循环变形硬化过程中疲劳强度参数变化的研究。

考虑到由于高强度高品质优质钢30KhGSN2A中各种循环载荷产生的硬化而导致表面层发生结构变化。确定硬化区的尺寸。结果表明，硬化发生在早期加载阶段，然后是持久的饱和状态，直到失效。分析了样品变形行为的差异以及抗疲劳性参数的变化。研究了循环载荷条件和预热处理方式对疲劳强度参数的影响。