Increase of the service life by a new laser-generated surface out of hard particle-reinforced composite material

金属板材表面的毛化利用润滑剂的凹槽效应，形成高-低的微观结构，扩展了金属板材成形技术的工艺极限。该结构最初使用各种毛化工艺设置在轧辊表面上，然后在轧制过程的最后操作期间通过塑性变形转移到板材表面。拟议的转移项目的目标是为冷轧生产提供多种新的表面纹理的平整辊产生一种新的微观几何结构。此外，应通过使用硬度高达3000 HV的硬质颗粒来延长轧辊的使用寿命，以替代目前使用的铬层。在SPP 1676内正在进行的关于实现具有高低结构的激光产生MMC表面的项目中获得的知识应应用于其他材料系统，并转移到工业应用中。挑战可能来自轧辊的高碳钢母材，这需要与摩擦学涂层系统相匹配的适应。因此，应用合作伙伴InnoJoin GmbH在偏置和工业规模下开发激光工艺，然后在应用合作伙伴的生产条件下进行加工和测试，并将相关结果转移回进一步的工艺开发。

The texturing of sheet metal surfaces creates a high-low-microstructure to extend the process limits in sheet metal forming technology by the lubricant pocket effect. This structure is initially set on the roll surfaces using various texuring process, which is then transferred to the sheet surface by plastic deformation during the last operation of the rolling process. The target of the proposed transfer project is the generation of a novel micro geometry for skin pass rolls for cold strip production which provide for manifold new surface textures. Additionally, an extended lifetime of the rolls shall be achieved by the use of hard particles with hardness of up to 3000 HV which allow for replacement of the chromium coatings used today. Knowledge gained within the ongoing project within the SPP 1676 on the realization of a laser generated MMC surface with a high-low structure shall be applied to other materials systems and transferred to industrial application. Challenges may result from the high carbon steel base metal of the rolls which require a matching adaption of the tribological layer system. Hence, the development of the laser processes at BIAS and scaling to industrial dimensions by the application partner Innojoin GmbH, followed by machining and testing under production conditions at an application partner, and transfer of relevant findings back to further process development.