蜂窝构型ZTAp-Fe复合材料磨损及耐腐蚀性能研究  

Wear and Corrosion Resistance of ZTAp-Fe Composites withHoneycomb Configuration

作　　者：范磊[1,2] 冉登林 耿新鸿 赵鑫哲 郝雪龙 Fan Lei;Ran Denglin;Geng Xinhong;Zhao Xinzhe;Hao Xuelong(School of Mechatronics and Information Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;Key Laboratory of Coal Mine Intelligence and Robot Innovation and Application of Emergency Ministry,Beijing 100083,China;Guobiao(Beijing)Inspection and Certification Co.,Ltd.,Beijing 101407,Chi-na;National Nonferrous Metals and Electronic Materials Analysis and Testing Center,Beijing 101407,China)

机构地区：[1]中国矿业大学(北京)机械与电气工程学院,北京100083 [2]应急部煤矿智能化与机器人创新应用重点实验室,北京100083 [3]国标(北京)检验认证有限公司,北京101407 [4]中国有研科技集团有限公司国家有色金属及电子材料分析测试中心,北京101407

出　　处：《稀有金属》2024年第6期808-821,共14页Chinese Journal of Rare Metals

基　　金：国家自然科学基金项目(51571210);国家大学生创新训练项目(202304058)资助。

摘　　要：为改善矿山机械部件磨损和腐蚀问题,制备了蜂窝构型氧化锆增韧氧化铝颗粒增强铁基(ZTAp-Fe)复合材料,对ZTAp占比为5%,10%和15%(质量分数)的蜂窝预制体,浇铸30SiMn钢液进行复合铸造。采取X射线衍射仪(XRD)、能谱(EDS)、扫描电子显微镜(SEM)、三体磨料磨损和腐蚀浸泡对其进行性能测试和表征。结果表明:ZTAp占比为5%和10%时,复合材料界面间结合情况良好,含量为15%时颗粒堆积严重,铸造过程热量传递受阻碍明显,出现气孔缺陷,使得ZTAp与铁基体间机械结合效果差;ZTAp含量由5%提升至15%,蜂窝构型ZTAp-Fe复合材料的耐磨性先增加后减弱,硬质相颗粒对磨料的阻挡作用显著,表面划痕和微犁沟减少,ZTAp含量为10%时复合材料耐磨性最佳;其相对耐磨性是HARDOX450耐磨钢的4.89倍,是NM450耐磨钢的4.81倍,是30SiMn钢的5.3倍。絮状腐蚀产物主要出现在30SiMn钢部分,随时间增加表面腐蚀产物和腐蚀程度加深,最终其表面出现黑色腐蚀坑;铁基体中含有大量Cr元素,耐腐蚀性良好,与30SiMn钢的冶金熔合区腐蚀量较少。所使用的铸造工艺可使该复合材料与矿用耐磨钢进行有效装配,显著提高其耐磨性和耐腐蚀性。In order to improve the wear and corrosion problems of mining machinery components,in this paper,honeycomb configu⁃ration zirconia toughened alumina particle reinforced iron matrix(ZTAp-Fe)composite was prepared,and the composite casting was carried out by casting 30SiMn steel with ZTAp in the proportion of 5%,10%and 15%(mass fraction)of honeycomb precast body.The properties were tested by X-ray diffractometer(XRD),energy spectrum analysis(EDS),scanning electron microscopy(SEM),threebody abrasive wear and corrosion immersion.The results showed that:30SiMn steel was mainly composed of ferrite and pearlite,and the iron matrix organization was mainlyα-Fe and intracrystalline precipitation of a diffuse distribution of granular carbides as(Fe,Cr)7C3.Although ZTAp was not surface modified,due to the"cold shrinkage"of the iron matrix during the cooling process and 30SiMn steel solidification process,ZTAp in the composite material was subjected to double compressive stress,and the iron matrix was tight⁃ly bonded.5%and 10%of ZTAp,the composite material interfacial bonding was good,ZTAp content of 15%,the reinforcing phase particles of the mass was higher than that of the particles,particles and particles are easy to appear with each other(bridging)phenom⁃enon,and the toughness of the metal matrix space was reduced.At the same time,the thermal conductivity of the particles was lower than that of the iron matrix,and the increase of ZTAp content could easily cause the phenomenon of particle agglomeration,blocking the transfer of casting heat in the composite material,resulting in the reduction of the fixed role of the iron matrix on the ZTAp,the cooling process of the particle aggregation and the tip was easy to produce a concentration of stress,the combined effect of the part of the particles and the matrix between the more obvious pore defects.When the proportion of particles in the composite material in⁃creased from 5%to 15%,the hardness of the iron matrix regionincreased with the increase in the mass fraction of

关 键 词：构型复合材料 颗粒增强 磨料磨损 耐腐蚀性 

分 类 号：TH117.1[机械工程—机械设计及理论]