索道钢丝绳外层丝白亮腐蚀层形成及分析

Formation and analysis of white-etching layers on outer layer wire of wire rope for cableway

采用SEM、X射线衍射(XRD)和显微硬度计研究和分析索道钢丝绳外层断丝表面白亮腐蚀层的硬度、结构和形成原因,白亮腐蚀层内的显微硬度最高达882 HV,结果表明:表层区域内的纳米索氏体-马氏体的形成是由于钢丝绳外层丝在承受弯曲交变载荷和摩擦力过程中严重塑性变形和冷加工诱发相变而导致的,这也是造成基体加工硬化区与纳米索氏体-马氏体区之间存在显微硬度差异的原因。

The hardness, structure and formation cause of white corrosion layer in cableway wire rope outer layer fracture wire wear surface layer were researched and analyzed by adopting SEM, XRD and microhardness tester. The highest micro- hardness of white corrosion layer reached 882 HV. Resuks show that the formation of nano sorbite-martertsite in surface re- gion is caused by wire rope outer layer wire serious plastic deformation and cold induced phase change in the process of sus- taining bending alternating load and friction force. This is another reason of microhardness difference existing between ma- trix process hardness region and nano sorbite-martensite region.