Beschreibung
Global ecological and economic changes necessitate innovative manufacturing technologies that promote resource conservation. In manufacturing, significant potential exists to optimize processes, particularly by targeting residual stresses to enhance the fatigue strength of components. This study investigates an innovative hard turn-rolling process, where the heat generated during hard turning is utilized for a simultaneously conducted deep rolling process. The aim is to gain a deeper understanding of the thermal interactions between these processes and their impact on component service life. Previous studies have shown that the separate application of hard turning and deep rolling can extend the fatigue life of rolling bearings. In contrast, the combined hard turn-rolling process, despite achieving high compressive residual stresses, did not improve fatigue life and, in some cases, even reduced it. This phenomenon may be attributed to uncontrolled thermal effects in the process, leading to undesirable material changes. To address this, experimental investigations were conducted, focusing on the process parameters and their influence on the material properties of the boundary zone. Detailed material analyses, including microstructural examinations and residual stress measurements, provided insights into the thermal and mechanical effects of the combined process. This work aims to analyze the interactions between thermal and mechanical effects in the combined hard turnrolling process. The findings contribute to the development of strategies for process optimization and improving the fatigue life of components.
