摘要
针对三牙轮钻头流道内实际工况,研究了钻头材料N i65和对比材料N i67和N i60+35%WC的冲蚀磨损特性。结果表明:N i65和N i67的冲蚀磨损阶段分为跑合期和稳定期,N i65磨损机制主要是微切削,而N i67的磨损机制主要是疲劳损伤和微切削;而N i60+30%WC的冲蚀磨损阶段为跑合期与周期性的稳定磨损和严重磨损期,其磨损机制主要是硬质点的脱落和疲劳点蚀。在试验过程中均伴有空蚀磨损。
The erosion wear characteristics of Ni65 and contrastive materials Ni67 and Ni60 ＋ 35% WC were studied according to the actual working conditions in the sprue of tricone bit. The results show that the erosion process of Ni65 and Ni67 is divided into running-in and stationary periods, while the erosion process of Ni60 ＋ 35% WC is divided into running-in and recurrent stationary wear and severity wear periods. The main wear mechanism of Ni65, Ni67 and Ni60 ＋ 35% WC is respectively micromachining, fatigue damage and micromachining, hard spots broking off and fatigue pitting. Cavitation wear is existed in the experiments.
出处
《润滑与密封》
EI
CAS
CSCD
北大核心
2006年第5期100-102,共3页
Lubrication Engineering
基金
湖南省科技攻关项目(02GKY3096)
