蜂窝构型ZTAp增强铁基复合材料磨损性能研究  

Wear Properties of Honeycomb ZTAp Reinforced Iron Matrix Composites

作　　者：周凤颖[1] 杨能 龚慧民 冉登林 胡纯 范磊[2,3,4,5] ZHOU Fengying;YANG Neng;GONG Huimin;RAN Denglin;HU Chun;FAN Lei(Beijing Polytechnic College,Beijing 100042,China;School of Mechatronics and Information Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;Key Laboratory of Intelligent Mining and Robotics,Ministry of Emergency Management,China University of Mining and Technology(Beijing),Beijing 100083,China;Zhengzhou Coal Mining Machinery Group Co.,Ltd.,Zhengzhou Henan 450016,China;State Key Laboratory of Tribology,Tsinghua University,Beijing 100084,China)

机构地区：[1]北京工业职业技术学院,北京100042 [2]中国矿业大学(北京)机电与信息工程学院,北京100083 [3]中国矿业大学(北京)煤矿智能化与机器人应用应急管理部重点实验室,北京100083 [4]郑州煤矿机械集团股份有限公司,河南郑州450016 [5]清华大学摩擦学国家重点实验室,北京100084

出　　处：《润滑与密封》2022年第11期40-46,共7页Lubrication Engineering

基　　金：清华大学摩擦学国家重点实验室开放基金项目(SKLTKF20B11);大学生创新训练项目(202204078)。

摘　　要：作为煤矿开采中主要运煤装备,刮板输送机中板长期受到煤和矸石的磨损,造成装备损坏,降低设备使用寿命,影响煤矿开采效率。以ZTA颗粒(氧化锆增韧氧化铝颗粒,ZTAp)、铁基自熔合金粉末、高铬铸铁(HCCI)为原材料通过蜂窝预制体制备及浇铸工艺制备出蜂窝构型ZTAp增强铁基复合材料(ZTAp-HCCI复合材料)。采用扫描电子显微镜、X射线衍生仪、差热分析以及有限元理论模拟计算方法对ZTAp-HCCI复合材料组织形成过程进行研究,通过硬度实验、划伤实验及滑动磨损实验对材料耐磨性能进行表征。结果表明:ZTAp-HCCI复合材料中HCCI与ZTAp间未发生元素扩散,二者为机械结合;基体增强相为(Fe, Cr)_(7)C_(3),在613℃时由Fe基体中固溶的C、Cr元素在晶界处形核析出。通过模拟计算表明,预制体在浇铸时为液相烧结,与HCCI形成冶金结合;通过划伤试验验证了ZTAp对于划痕的阻碍作用,同时证明HCCI对于ZTAp有良好的固定与承载作用。实验结果证明蜂窝构型ZTAp-HCCI复合材料耐磨性要远高于常用耐磨钢,其耐磨性能是铁基自熔合金的7倍。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)_(7)C_(3),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.

关 键 词：蜂窝构型 ZTAp 铁基复合材料 模拟计算 磨损 

分 类 号：TH117.1[机械工程—机械设计及理论]