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作 者:陈容[1] 刘希斌[1] 史明灿 CHEN Rong;LIU Xibin;SHI Mingcan(Pangang Group Research Institute Co.,Ltd.,State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization,Panzhihua 617000,China)
机构地区:[1]攀钢集团研究院有限公司,钒钛资源综合利用国家重点实验室,四川攀枝花617000
出 处:《物理测试》2023年第4期45-48,共4页Physics Examination and Testing
摘 要:为了分析高空作业卷扬机钢丝绳服役过程中发生断裂的原因,采用体式显微镜、光学显微镜、扫描电镜对缺陷部位断口、显微组织进行了分析,同时采用拉伸试验机对正常部分的样品进行了力学性能分析。结果表明:钢丝绳在使用过程中与桥面预留孔反复挤压、摩擦,形成了白亮层组织和摩擦挤压痕,表面损伤的钢丝绳在反复升降的斜拉力作用下发生剪切断裂,剩余部分钢丝绳因整体性被破坏,当超过钢丝绳本身的最大破断力时被强行拉断,造成钢丝绳的整绳断裂。In order find out the causes of fracture in the service process of wire rope for aerial work,the fracture surface and microstructure of the defective part were analyzed by means of stereo microscope,optical microscope and scanning electron microscope.Meanwhile,the mechanical properties of the normal samples were analyzed using tensile testing machine.The results showed that the white layer microstructure and friction extrusion trace were formed due to the repetitive extrusion and friction between steel wire rope and reserved hole of fixed pully during use.The shear fracture of steel wire rope with damaged surface occurred in repetitive lifting of diagonal tension.The integrity of remaining steel wire rope was destroyed.The fracture of whole steel wire rope was caused when the load-bearing capacity was greater than the ultimate load.
分 类 号:U445.3[建筑科学—桥梁与隧道工程]
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