Manufacturing of optimized technical surfaces through a process combination of stream finishing and laser ablation

该研究项目的目的是设计一种有效的工艺策略，用于激光烧蚀和流精加工的工艺组合，以流体动力润滑滑动轴承（轴承轴由42CrMo4材料制成，轴承壳由100Cr6材料制成）为例，在部件寿命方面生产优化的技术表面。作为一种高效的后处理工艺链，用于机械表面处理的流精加工和用于摩擦学优化的激光微结构化的工艺组合的高潜力可以从现有技术和我们自己的初步工作中获得。然而，这两个过程之间的相互作用和所产生的组分状态的边界层是至关重要的，必须进行调查。在计划项目范围内验证通过使用应变硬化和更耐用的微观结构来增加轴承使用寿命的假设，并了解工艺组合的机制。对于调查，滑动轴承的摩擦学性能的兴趣，除了表面形貌，残余应力和应变硬化的边界层的深度分布。

The aim of the research project is the design of an efficient process strategy for the process combination of laser ablation and stream finishing for the production of optimized technical surfaces with regard to component life using the example of a hydrodynamically lubricated plain bearing (bearing shaft made of the material 42CrMo4 and bearing shell made of the material 100Cr6). A high potential of the process combination of stream finishing for mechanical surface treatment and laser microstructuring for tribological optimization as an efficient post-processing process chain can be derived from the state of the art and our own preliminary work. However, the interactions between both processes and the resulting component states in the boundary layer are of elementary importance and have to be investigated. The hypothesis of increasing a bearings service life by the use of strain hardened and therefore more durable microstructures is to be verified within the scope of the planned project and the understanding of the mechanisms for the process combination is developed. For the investigations, the tribological properties of the plain bearing are of interest in addition to the surface topography, residual stress and strain hardening depth distributions in the boundary layer.