纳米陶瓷中间合金增强高铬铸铁铸渗层的研究  

Study on Cast-Infiltrated Layer of High Chromium Cast Iron Reinforced by Master Alloys with Nano-Ceramics

作　　者：谢文芳 邵星海 毛志平[4,5] XIE Wen-fang;SHAO Xing-hai;MAO Zhi-ping(Luoyang Institute of Electro-Optical Equipment,AVIC,Luoyang 471009,Henan,China;Luoyang Advanced Manufacturing Industry R&D Base of Tianjin Advanced Equipment Research Institute of Tsinghua University,Luoyang 471004,Henan,China;Qingyan special material technology(Luoyang)Co.,Ltd.,Luoyang 471004,Henan,China;Henan University of Science and Technology,Luoyang 471004,Henan,China;Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-Ferrous Metal New Materials and Advanced Processing Technology,Luoyang 471004,Henan,China)

机构地区：[1]中国航空工业集团公司洛阳电光设备研究所,河南洛阳471004 [2]清华大学天津高端装备研究院洛阳先进制造产业研发基地,河南洛阳471009 [3]清研特材科技(洛阳)有限公司,中国洛阳471004 [4]河南科技大学,河南洛阳471004 [5]有色金属新材料与先进加工技术省部共建协同创新中心,河南洛阳471004

出　　处：《铸造》2020年第2期154-158,共5页Foundry

摘　　要：采用将纳米陶瓷颗粒单独加入或者混入中间变质合金后加入两种方法,通过传统的砂型铸渗工艺在中碳铸钢ZG270-500表面分别制备出纳米粉末增强高铬铸铁铸渗层和纳米变质合金增强高铬铸铁铸渗层两种材料。通过微观组织分析和耐磨性能测试发现:将纳米TiN颗粒以粉末形式直接加入,渗层中的碳化物分散较为均匀,但仍保留有不明显的网状特征;加入变质合金的渗层中碳化物呈颗粒状、棒状或层片状独立分布;若变质合金中加入稀土,渗层中碳化物呈细小的颗粒状,在基体中均匀弥散分布,因此它的硬度较高,耐磨性能最好。Both nano powder enhanced cast-infiltrated layer of high chromium cast iron and nano metamorphic alloy enhanced cast-infiltrated layer of high chromium cast iron were respectively prepared on the surface of ZG270-500 by the traditional sand mold casting infiltration process.Microstructure analysis,hardness and abrasive wear tests of cast-infiltrated layer were carried out by using SEM,TEM-EDS,hardness tester and ML-100 type wear testing machine.The experiment results show that carbide particles in the cast-infiltrated layer that was obtained by the nano TiN powder added directly into infiltration agent,are uniformly distributed but remain still some indistinct net features;however,carbide particles in the cast-infiltrated layers obtained by nano particles added in a modified alloy form,are uniformly distributed in the form of particles,rod-shaped or lamellae,in particular in the cast-infiltrated layer obtained by the nano TiN particles added in a master alloy containing small amounts of rare earth,carbides are dispersed in austenite matrix in the form of fine particles.Therefore,wear resistance of the cast-infiltrated layer had high hardness and the best wear resistance.

关 键 词：纳米陶瓷 中间合金 铸渗层 耐磨性 

分 类 号：TG174.445[金属学及工艺—金属表面处理]