纳米VC颗粒强化高铬铸铁组织与性能的研究  

Research on Microstructure and Properties of High Chromium Cast Iron Strengthened by Nano VC Particle

作　　者：周建党[1] 王海军[1] 李明喜[1] 

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243000

出　　处：《热加工工艺》2017年第18期119-122,129,共5页Hot Working Technology

基　　金：安徽省科技攻关项目(1501021069)

摘　　要：采用模具表面喷涂纳米颗粒溶剂的方法制备纳米VC强化高铬铸铁试样。通过金相、SEM、冲击韧性和耐磨性实验,研究了不同含量纳米VC对高铬铸铁微观组织与力学性能的影响。结果表明:纳米VC的加入使高铬铸铁的凝固组织改善,力学性能提高,且随着VC含量的增加,效果越显著。当纳米VC颗粒添加量为0.015%时,高铬铸铁组织被明显细化,碳化物形貌由粗大板条状变为细小的杆状或颗粒状,分布更为均匀。与未加VC的试样相比,该高铬铸铁的冲击吸收功增加39.2%,磨损率减少48%。VC nano-powders reinforced high chromium cast iron was prepared by spraying nano particle on the surface of the mold. The effects of nano-VC with different contents on the microstructure and mechanical properties of high chromium cast iron were studied by metallographic microscope SEM, impact toughness and wear resistance test. The results show that by the addition ofnano-VC, the solidification microstructure of high chromium cast iron improves and the mechanical properties elevate. The effect is more significant with the increase of VC content. When the addition ofVC nanoparticles is 0.015%, the microstructure of high chromium cast iron is obviously refined, then, the carbide morphology changes from coarse acicular shape to small rhabditiform or partical shape. And the carbide is evenly distributed. Compared with samples without adding VC, the impact absorbing energy of high chromium cast iron increases by 39.2% and the wear rate decreases by 48%.

关 键 词：高铬铸铁 纳米VC颗粒 显微组织 力学性能 

分 类 号：TG144[一般工业技术—材料科学与工程] TG24[金属学及工艺—金属材料]