摘要
以Ni60A粉、TiC粉、TiN粉、WC粉和Co粉为原料,在Q235钢的表面用氩弧熔覆原位合成技术制备了Ti(C,N)-WC增强镍基复合材料涂层。分析了涂层的显微组织、化学成分、硬度变化和摩擦磨损特性。研究结果表明:熔覆层组织主要由富Ni的γ(Ni,Fe)相,Ti(C,N),WC和(Fe,Cr);C等组成。与Q235钢基体相比,涂层的显微硬度和耐磨性分别是基体Q235钢的6.5倍和10倍。显微硬度由表及里呈先上升后下降的阶梯状趋势,到热影响区时又明显降低。基体Q235钢的磨损机制为粘着磨损和磨料磨损,而复合涂层的的磨损形式主要是磨屑充当第三体引起的磨粒磨损。
By using Ni60 A,TiC,TiN and Co powders as the raw material,Ti(C,N)-WC particle reinforced Ni-based composite coating was systhesized in- situ by argon arc cladding.Microstructure,chemical composition,hardness and tribological characteristics of the coating were analyzed.The results showed that the microstructure of the coating mainly consists of Ni-rich y(Ni,Fe) phase,Ti(C,N),WC,and(Fe,Cr) xC.Compared with that of the Q235 steel substrate,the microhardness and wear resistance of the coating are 6.5 and10 times of that of substrate,respectively.The microhardness increases firstly and then decreases from composite coating to substrate,and decreases obviously in the heat affected zone.The wear mechanism of Q235 steel is adhesive wear and abrasive wear,while the wear form of composite coating is abrasive wear caused by debris as the third part.
出处
《焊接》
北大核心
2015年第6期42-46,75,共5页
Welding & Joining
基金
江苏省大型工程装备检测与控制重点建设实验室开放课题(JSKLEDC201308)
徐州市科技计划项目(KC14SM100)
关键词
Ti(C
N)-WC
氩弧熔覆
原位合成
耐磨性
Ti(C,N)-WC
gas tungsten arc cladding(GTAW)
in-situ synthesis
wear resistance
