摘要
利用自制的摩擦磨损实验机,研究了碳含量对高钒高速钢磨损性能的影响及其磨损机理。研究表明,当滚滑比为5%时,高钒高速钢的耐磨性随碳含量的增加先提高后降低,并在碳含量为2.58%左右时耐磨性最佳。碳含量对耐磨性的影响主要是通过对基体残余奥氏体量和碳化物形态表现出来的,适量的残余奥氏体使基体具有较好的冲击韧度及硬度;形态较为圆整的VC颗粒,对裂纹的萌生及扩展起阻碍作用,从而使材料的耐磨性提高。在滚滑动摩擦磨损条件下,其磨损机理主要为疲劳剥落。
The effect of carbon content on the frictional resistance of high vanadium high speed steel and abrasion mechanism were studied on the self-developed friction wear testing machine. The result show that when the roll-to-slip ratio is 5%, the frictional resistance increase firstly and then decrease with increasing carbon content, and the steel with 2.58 wt% carbon has the best frictional resistance. The improvement of the frictional resistance is mainly due to the effect of carbon on residual austenite and the morphology of carbides, and an appropriate amount of residual austenite is helpful to improve the impact toughness and hardness of matrix; The spherical VC can hinder the initiation and propagation of crack and improve the frictional resistance. The abrasion mechanism is fatigue flake under the condition of rolling and sliding.
出处
《铸造技术》
CAS
北大核心
2008年第10期1335-1339,共5页
Foundry Technology
基金
国家自然科学基金项目(50741034)
河南科技大学科学研究基金资助
关键词
碳含量
滚滑动
高钒高速钢
磨损机理
Carbon content
Rolling and sliding
High vanadium high speed steel
Abrasion mechanism
