搅拌叶片表面原位合成TiC颗粒增强高锰钢复合层的制备及性能  

Preparation and Properties of In-situ Synthesized TiC Particle Reinforced High Manganese Steel Composite Layer on Mixing Blade Surface

作　　者：程军[1] 范明洋 杨吉春[1] 胡宇 CHENG Jun;FAN Mingyang;YANG Jichun;HU Yu(College of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,包头014010

出　　处：《机械工程材料》2023年第3期37-41,47,共6页Materials For Mechanical Engineering

基　　金：内蒙古自治区应用技术研究与开发资金资助项目(2020GG0154)。

摘　　要：采用燃烧合成反应铸渗结合真空消失模铸造工艺,在ZG120Mn13Cr2高锰钢搅拌叶片表面制备原位合成TiC颗粒增强高锰钢复合层,研究了该复合层的显微组织、硬度以及在湿砂磨损条件下的耐磨性能,并与BTMCr20高铬铸铁和ZG120Mn13Cr2高锰钢的硬度和耐磨性能进行对比,测试了复合层叶片在稳定土条件下的现场使用寿命。结果表明:复合层与高锰钢基体呈冶金结合,其组织由原位合成的细小TiC颗粒、外加的粗大TiC颗粒和高锰钢基体相构成,原位合成的TiC颗粒呈圆球或近圆球状均匀分布在基体相中;复合层的平均硬度为58 HRC,高于高锰钢低于高铬铸铁,磨损质量损失略高于高铬铸铁但远低于高锰钢。复合层叶片的现场使用寿命为1700 h,为高锰钢叶片的2倍以上,略高于高铬铸铁叶片。By combination of combustion synthesis reaction casting infliltration and vacuum-expendable pattern casting,in-situ systhesized TiC particle reinforced high manganese steel composite layer was prepared on the surface of ZG120Mn13Cr2 high manganese steel mixing blade.The microstructure,hardness and wear resistance under wet sand wear conditions of the composite layer were studied.The hardness and wear resistance were compared with those of BTMCr20 high chromium cast iron and ZG120Mn13Cr2 high manganese steel.The field service life of the blade with composite layers under stabilized soil conditions was tested.The results show that the composite layer was metallurgically bonded to the high manganese steel matrix.The microstructure of the composite layer consisted of in-situ systhesized fine TiC particles,extra coarse TiC particles and high manganese steel matrix phases,and the in-situ synthesized TiC particles were spherical or nearly spherical and uniformly distributed in the matrix phase.The average hardness of the composite layer was 58 HRC,which was higher than that of high manganese steel and lower than that of high chromium cast iron.The wear mass loss of the composite layer was slightly higher than that of high chromium cast iron but much lower than that of high manganese steel.The field service life of the blade with the composite layer was 1700 h,which was more than 2 times that of the high manganese steel blade,slightly higher than that of the high chromium cast iron blade.

关 键 词：原位燃烧合成 金属陶瓷复合层 真空消失模铸造 搅拌叶片 

分 类 号：TG174.4[金属学及工艺—金属表面处理]