摘要
采用热等静压粉末冶金技术和水冷铜坩埚真空悬浮熔炼技术相结合的方法,制备了体积分数为20%、25%、30%、35%的原位自生(TiC+TiB)/TC4复合材料。采用X射线衍射、扫描电子显微镜对复合材料的相组成和显微组织进行了研究。使用盘-销式高温高速摩擦磨损试验机、显微硬度仪对不同体积复合材料的摩擦磨损性能、显微硬度进行研究。结果表明:制备的复合材料组织致密,增强相TiC、TiB在基体中分布均匀。随着增强相体积分数提高,复合材料的硬度提高、摩擦系数和磨损量降低,对磨面摩擦氧化物数量增加。35%体积分数的增强相复合材料平均硬度达到HV892.83,在200 N的载荷、转数为120 r/min下平均摩擦系数为0.32,平均的磨损量为78.9 mg,具有优异的摩擦磨损性能。
Combined with hot isostatic pressing powder metallurgy technology and water-cooled copper crucible vacuum suspension smelting technology,in-situ(TiC+TiB)/TC4 composites with volume fractions of 20%,25%,30%,and 35% were prepared.X-ray diffraction and scanning electron microscope were used to investigate the phase composition and microstructure of the composites.The friction and wear performance and microhardness of the composites of different volumes were investigated using a disc-pin high temperature and high speed friction and wear tester,and microhardness tester.The results showed that the prepared composites had a dense structure,and the reinforcement phases TiC and TiB were distributed uniformly in the matrix.As the volume fraction of the reinforcing phase increased,the hardness of the composite material increased,the friction coefficient and the amount of wear decreased,and the amount of friction oxides on the wear surface increased.The average hardness of the reinforced phase composite with 35% volume fraction reached HV 892.83.Under a load of 200 N and a revolution of 120 r/min,the average friction coefficient was 0.32,and the average wear was 78.9 mg,which has excellent friction and wear properties.
作者
谢嘉琪
史昆
刘时兵
赵军
于波
刘鸿羽
陈红
严建强
曲赫威
XIE Jia-qi;SHI Kun;LIU Shi-bing;ZHAO Jun;YU Bo;LIU Hong-yu;CHEN Hong;YAN Jian-qiang;QU He-wei(Shenyang Research Institute of Foundry Co.,Ltd.,State Key Laboratory of Light Alloy Foundry Technology for High-End Equipment,Shenyang 110022,Liaoning,China;Military Representative Room of PLA Armament Department in Shenyang,Shenyang 110034,Liaoning,China)
出处
《铸造》
CAS
北大核心
2022年第3期346-350,共5页
Foundry
关键词
钛基复合材料
高体积分数
摩擦磨损性能
显微组织
titanium matrix composites
high volume fraction
friction and wear performance
microstructure
