Failure Analysis of Middle Plate of Scraper Conveyor in Coal Mine
Author of the article:ZHU Xiuguang;QIU Han;MU Runqing;LI Jie;TU Xiaohui;LI Wei
Author's Workplace：China Coal Zhangjiakou Coal Mining Machinery Co.,Ltd.,Zhangjiakou 076250,China;Institute of Advanced Wear&Corrosion Resistant and Functional Materials,Jinan University,Guangzhou 510632,China;National Joint Engineering Research Center of High Performance Metal Wear Resistant Materials Technology,Jinan University,Guangzhou 510632,China
Key Words：scraper conveyor middle plate abrasive wear peeling wear
Abstract：Scanning electron microscope(SEM),X-ray diffractometer(XRD),transmission electron microscope(TEM)and microhardness tester were used to analyze and study the failure behavior of the middle plate of scraper conveyor in a coal mine.The results show that the wear is the most serious at the joint of the plate,and the main reason for the wear failure is the micro-cutting caused by the relative sliding between the chain,coal scraps and gangue and the plate.At the same time,the fatigue spalling caused by the nanostructure of the subsurface of the wear surface is also an important factor leading to the failure of the middle plate joint.Therefore,under the condition of ensuring a certain hardness,the suppression of the formation of deformation layer is a key problem to be considered in the design process of medium plate materials.
