研究目的
Investigating the effects of single- and multi-shape laser-textured surfaces on tribological properties under dry friction conditions.
研究成果
The ST and SGT surfaces can be considered as the optimum choices for dry reciprocating friction due to their lowest friction coefficients and stable friction-coefficient fluctuation-maintenance ability. The micro-DT was unsuitable for dry reciprocating friction.
研究不足
The applicability of the results to other working conditions requires further verification. The actual area ratio had a tolerance of 2%–10% due to the fast molten and re-solidification of removed materials during the nanosecond laser process.
1:Experimental Design and Method Selection:
Six types of textures including single- and multi-shape textures were produced on 40Cr steel samples using a nanosecond laser. Reciprocating sliding tests under dry friction were conducted using a pin-on-disc friction tester.
2:Sample Selection and Data Sources:
40Cr steel samples were used as substrate material. The samples were ground and polished to a mirror finish before laser surface texturing.
3:List of Experimental Equipment and Materials:
Nanosecond laser (YLP-MP20), pin-on-disc friction tester (MDW-05), scanning electron microscopy (SEM) system (JSM-7200F, JEOL), three-dimensional profilometer (Zeta-20).
4:0).
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Laser surface texturing was conducted with specific parameters. The morphology of the surface textures was measured and observed. Reciprocating sliding tests were conducted under dry conditions.
5:Data Analysis Methods:
The variations in friction coefficient with time were directly determined using the software on the MDW-05 tribometer. The average friction coefficients were calculated based on the transient data of the friction-coefficient curve.
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