原位合成(Ti,W)C增强高铬钢复合材料的显微组织与磨损性能  

Microstructure and Wear Properties of In-Situ Synthesized(Ti,W)C Reinforced High Chromium Steel Composites

作　　者：石永亮 李爽 陈存广 SHI Yong-liang;LI Shuang;CHEN Cun-guang(Department of Materials Engineering,Hebei Vocation University of Industry and Technology,Shijiazhuang 050091,Hebei,China;Advanced Material&Technology Institute,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]河北工业职业技术大学材料工程系,河北石家庄050091 [2]北京科技大学新材料技术研究院,北京100083

出　　处：《铸造》2022年第5期574-578,共5页Foundry

基　　金：河北省重点研发计划项目(21351501D)。

摘　　要：以高铬钢为基体,采用中频熔炼过程中加入预制块的方法,按照不同的W/Ti原子比,原位合成制备了三种不同成分(Ti,W)C陶瓷颗粒增强高铬钢基复合材料,陶瓷颗粒体积分数高达20%。通过扫描电镜和XRD等手段研究了复合材料的显微组织和物相组成,并对材料的硬度和耐磨性进行了测定。结果表明,原位生成(Ti,W)C颗粒细小,粒度小于3μm,颗粒呈不规则形状,在钢基体中分布均匀,与基体结合良好。随着预制块中W/Ti原子比的提高,生成的(Ti,W)C陶瓷颗粒中W含量提高,芯-壳结构中壳层增厚,并且多余的W原子进入钢基体或生成Fe_(2)W_(4)C,提高了钢基体的硬度,与高铬钢相比,复合材料的耐磨性显著提高。According to different W/Ti atomic ratios,three kinds of(Ti,W)C ceramic particle with 20%volume fraction reinforced high chromium steel matrix composites were prepared by in-situ synthesis with high chromium steel as matrix and adding prefabricated blocks in the process of medium frequency melting.The microstructure and phase composition of the composites were studied by SEM and XRD,and the hardness and wear resistance of the composites were measured.The results showed that the in-situ(Ti,W)C particles with fine particle less than 3μm and irregular shape presented uniform distribution and good bonding with matrix.With the increase of the W/Ti atomic ratio in the preform,the W content in(Ti,W)C ceramic particles was increased and accompanied with shell thickening.And some W atoms entered the steel matrix or form Fe_(2)W_(4)C,which improved the hardness of the steel matrix.Compared with high chromium steel,the wear resistance of the composite was significantly improved.Moreover,with the excess W atoms entering the steel matrix or forming Fe_(2)W_(4)C,the hardness of the steel matrix was improved.Compared with the high chromium steel,the wear resistance of the composites was significantly improved.

关 键 词：FE基复合材料 原位合成 (Ti W)C强化 高铬钢 摩擦磨损 

分 类 号：TG142.7[一般工业技术—材料科学与工程]