Product Code: PIC2008_P141

Friction and Wear Characteristics of Laser-Clad Nano-Lubricant Coating
Authors:
W.Y. Wang, Henan University of Science and Technology; Luoyang Peoples Republic of China
X.F. Zhang, Huazhong University of Science and Technology; Wuhan Peoples Republic of China
H. Yan, Huazhong University of Science and Technology; Wuhan Peoples Republic of China
A.H. Wang, Huazhong University of Science and Technology; Wuhan Peoples Republic of China
X.L. Zhang, Huazhong university of science and technology; Wuhan Peoples Republic of China
X.F. Zhang, Huazhong University of Science and Technology; Wuhan Peoples Republic of China
Presented at PICALO 2008

The friction and wear characteristics of nickel-based self-solid lubrication coating which was prepared in different process in YAG Laser cladding was studied in this paper. The change trendency of some elements and surface topography of the coating was analysed by SEM and EDS. It was found that the lubricant can be refined, the organization was more uniform and dense. While laser power was 380W, the coating was more uniformity and compact. Using nano-technology to make high-energy ball milling of Ni h-BN powder modified during, there were some B and N element in lading layer and the Fe element diffuse for the lading layer. Cladding layer and the substrate is good metallurgical combine. The friction and wear characteristics of the coating which was contain solid-phase lubricant (h-BN) and non-lubricant were tested on MMS-1G testing machine. The results show that friction coefficient of pure Ni60 cladding material is greater than that of Ni60-BN at room temperature which was loaded 40N and at 2m/s as well as high temperature(400) which was loaded 20N and at 2m/s, and the friction coefficient is less than 0.4. The wear resistance of Ni60-BN coating is about 10 times than that of Ni60 coating. The SEM analysis of the abrasion morphology found that wear mechanism of self-solid lubrication coating was adhesive wear, and wear mechanism of the cladding layer of non-lubricant was adhesive wear with abrasive wear. Macroscopic analysis indicated that the effect of the friction-reducing with lubricant coating was obvious.