Abstract:As the main coal transportation equipment in coal mining,the middle plate of the scraper conveyor has been worn by coal and gangue for a long time,causing equipment damage,reducing the service life of the equipment and affecting the efficiency of coal mining.Honeycomb configuration ZTAp reinforced iron matrix composites (ZTAp-HCCI composites) were prepared by honeycomb preform preparation and casting process using ZTA particles (ZTAp),iron-based self-fluxing alloy powders,and high-chromium cast iron (HCCI) as raw materials.Scanning electron microscopy,X-ray derivatization,differential thermal analysis and finite element theoretical simulation calculation methods were used to study the microstructure formation process of ZTAp-HCCI composites,and the wear resistance of the materials was characterized by hardness test,scratch test and sliding wear test.The results show that there is no element diffusion between HCCI and ZTAp in ZTAp-HCCI composites,and the two are mechanically bonded.The matrix reinforcement phase is (Fe,Cr)7C3,which comes from the nucleation and precipitation at the grain boundary by the solid solution of C and Cr elements in the Fe matrix.Through the simulation calculation,it is found that the preform is sintered in liquid phase during casting,forming a metallurgical bond with HCCI.The hindering effect of ZTAp on scratches was verified by scratch test,and HCCI was proved to have good fixation and load-bearing effect on ZTAp.The results show that the wear resistance of the honeycomb ZTAp-HCCI composite is much higher than that of the commonly used wear-resistant steel,and its wear resistance is 7 times that of the iron-based self-fluxing alloy.