Abstract
Running-in is the initial phase of the entire wear process and significantly influences the performance and service life of wear components. Surface profile is an important feature of wear components, and researchers have made a lot of effort in investigation of running-in based on surface profile. However, surface profile merely contains the two-dimensional information about surface, which cannot represent the three-dimensional information. Due to the technology development of surface measurement and analysis, three-dimensional evaluation of surface topography can effectively extract comprehensive information about surface. Therefore, it is necessary to update the conclusions about running-in wear based on surface profile. This paper adopted areal surface evaluation parameters derived from surface topography instead of surface roughness parameters derived from surface profile to investigate a common phenomenon of running-in, which illustrates that the surface roughness after running-in is independent of the nature of initial roughness. The analysis of experiment result revealed that some properties of surface topography before running-in process are reserved after running-in.
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