CC/KMTBCr20复合材料制备及其磨损行为  

Preparation and Wear Behavior of CC/KMTBCr20 Composites

作　　者：刘庆坤 刘宪民 周长猛 巩传海 陈蕴博 于童童 李烨飞[2] 高义民[2] 赵四勇 LIU Qingkun;LIU Xianmin;ZHOU Changmeng;GONG Chuanhai;CHEN Yunbo;YU Tongtong;LI Yefei;GAO Yimin;ZHAO Siyong(Shandong Huifeng Foundry Technology Co.,Ltd.,Ji'nan 250204,China;State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an 710049,China;Guangxi Great Wall Machineries,Hezhou 542699,China)

机构地区：[1]山东汇丰铸造科技股份有限公司,山东济南250204 [2]西安交通大学金属材料强度国家重点实验室,陕西西安710049 [3]广西长城机械股份有限公司,广西贺州542699

出　　处：《热加工工艺》2022年第16期84-87,共4页Hot Working Technology

基　　金：广东省重点领域研发计划资助项目(2019B010942001);广西创新驱动发展专项资金项目(桂科AA18242001);中央高校基本科研业务费专项资金资助项目(XTR0118008)。

摘　　要：针对整层复合结构的铁基表层复合材料界面结合差,高冲击作用下复合层容易剥落的问题,提出采用蜂巢状结构钢结硬质合金(CC)与高铬铸铁(KMTBCr20)进行复合成形制备复合材料。重点研究复合材料的微观组织以及考察复合材料的三体磨粒磨损性能。结果表明:复合材料的过渡层由铁基体、鱼骨状铁铬碳化物以及M_(7)C_(3)组成。浸渗过程中硬质合金边界存在细小碳化钨的溶解导致增强区域硬度有所下降。经三体磨粒磨损性能测试表明,复合材料的耐磨性达到相应基体材料的1.6倍。其中,硬质合金区的磨损机制表现为短程切削和疲劳剥落;基体区的磨损机制表现为长程切削和多次塑性变形引起的剥落。To solve the problem of poor interface bonding and easy exfoliation of composite layer under high impact,honeycomb structure steel cemented carbide(CC)and high chromium cast iron(KMTBCr20)were used to prepare composite materials.The microstructure of the composites and the wear properties of the composites were studied.The results show that,the transition layer of the composite consists of iron matrix,fish-bone iron-chromium carbide and M_(7)C_(3).The dissolution of tungsten carbide at the boundary of cemented carbide during infiltration leads to decrease of the hardness in the enhanced region.The wear resistance of the composite material is 1.6 times than that of the matrix material.Among them,the wear mechanism of cemented carbide region is short range cutting and fatigue spalling,and the wear mechanism of matrix region is long range cutting and spalling caused by multiple plastic deformation.

关 键 词：铁基复合材料 铸渗 高铬铸铁 磨损 

分 类 号：TB331[一般工业技术—材料科学与工程]