球磨对TiC颗粒增强高速钢复合材料显微组织与性能的影响  

Effects of ball milling process on microstructure and properties of TiC particles reinforced high speed steel composites

作　　者：彭文静[1] 陈国强[2] 周建宇[1] 

机构地区：[1]湖南工程学院工程训练中心,湘潭411101 [2]湖南工程学院机械工程学院,湘潭411101

出　　处：《中国有色金属学报》2017年第6期1169-1175,共7页The Chinese Journal of Nonferrous Metals

摘　　要：研究TiC颗粒与钢基混合粉在高能球磨过程中的显微组织与性能,分析在球磨过程中,粉末颗粒的形貌变化与粒度分布规律,明晰球磨时间对烧结合金致密度、显微组织和力学性能的影响。结果表明:当球磨时间从0 h增加到30 h时,粉末颗粒发生变形破碎,粉末粒度快速降低;当球磨时间进一步增加到40 h时,粉末颗粒间的焊合破碎作用达到平衡,此时,粉末粒度变化趋于平缓,粉末形貌由最初的球形大颗粒变化为细小的层片状。当球磨时间继续增加时,粉末形貌不再有明显变化。烧结合金的致密度、显微组织和力学性能也呈现出相似的变化规律。复合材料的最佳球磨时间为40 h。The microstructure and properties of TiC particles mixed with high speed steel powders during high energy ball milling were systematically investigated. The transformation of the powder particle morphology and the distribution of particle size changing with the milling time were also analyzed. In addition, the effects of ball milling time on the density, the structure and mechanical properties of sintered composites were revealed. The results indicate that, when the ball milling time increases from 0 h to 30 h, the deformation and crush of powders presented, resulting in the rapid decrease of the powder particle size. With increasing the ball milling time to 40 h, the welded crushing effect of the particles reaches the balance, while the particle size remains unchanged and the original big spherical particles are changed into the tiny layer powders. When further increasing the ball milling time, the morphology of powders cannot change significantly. The density, structure and mechanical properties of the sintered alloy have the similar trend. Therefore, the optimal ball milling time of the composite material is 40 h.

关 键 词：高能球磨 TIC颗粒 高速钢 复合材料 

分 类 号：TG148[一般工业技术—材料科学与工程]