A typical ferritic/martensitic (F/M) sheet was subjected to laser surface treatment (LST) with microstructural characteristics, hardness and wear resistance before and after the LST well revealed by jointly utilizing multiple characterization methods. Two distinct modification zones exist in the LSTed specimen: (i) melted zone consisting of both martensitic plates and bulk δ ferrite and (ii) heat-affected zone mainly composed of martensitic plates, with respective hardnesses of 385 ± 17 HV and 442 ± 44 HV, markedly higher than that of the substrate (267 ± 3 HV). Wear rate measurements suggest that wear resistance of the LSTed F/M steel is improved by >50%. The improved surface properties are well correlated with specific microstructural characteristics induced by the LST.

在典型的铁素体/马氏体（F / M）片材的表面处理前后，通过联合使用多种表征方法，对其进行了显微组织特性，硬度和耐磨性的激光表面处理（LST）。LSTed试样中存在两个明显的改性区：（i）由马氏体板和块状δ铁素体组成的熔化区；（ii）主要由马氏体板组成的热影响区，其硬度分别为385±17 HV和442±44 HV，显着高于基材（267±3 HV）。磨损率测量表明，LSTed F / M钢的耐磨性提高了> 50％。改善的表面性能与LST诱导的特定微结构特征密切相关。