A Technology of Using Surface Magnetization Variations for Evaluating the Wear-Resistant Properties of the Die Surfaces with Different TiN Films
Generally speaking, the major parameter which has been used to monitor the dynamic tribological properties of the films over the past decades is friction coefficient. However, it has shown low in sensitivity for many cases. Therefore, it is necessary to introduce more improved physical measurements other than the friction coefficient to monitor and control the film tribological characteristics in sliding contacts. In view of this, the novel technology of using instead surface magnetization variations for evaluating the wear-resistant properties of the films is proposed. The experiment was conducted by the pairs of SUS304 rubbing with SKD11 substrate with different TiN films (PVD and CVD) on the surface at different normal loads in dry friction process. According to the experimental results of the dynamic variations of surface magnetization and friction coefficient with the SEM observations of the wear tracks, the effects of normal loads on the friction and wear properties for the die surfaces with different TiN films can be investigated. The experimental results show that the continuous surface magnetization variations can be used to determine the timing of film fracture and the endurance life more accurately than that by the friction coefficient variations as usual. Therefore, the novel method of using surface magnetization variations does show great potentialities for evaluating the tribological properties of the die surfaces with different TiN films.
Sheng-Jye Hwang and Sen-Yung Lee
Y. P. Chang et al., "A Technology of Using Surface Magnetization Variations for Evaluating the Wear-Resistant Properties of the Die Surfaces with Different TiN Films", Materials Science Forum, Vol. 594, pp. 377-382, 2008