Abstract
Fatigue wear resistance improvements were researched by studying experimental samples with gray cast iron fabricated with bionic units in different orientations. Experimental samples were modified by laser surface remelting, including parallel, vertical, and gradient units to the wear direction. The remelting pool was then studied to determine the micro-hardness, microstructure, alteration of phase, and etc. Lab-control fatigue wear test method was applied with the treated and untreated samples tested under the laboratorial conditions. Wear resistance result was considered as the rolling contact fatigue (RCF) resistance and mechanisms of the modified samples were experimentally investigated and discussed. Results suggested that all treated samples demonstrated the beneficial effect on the RCF improvement due to lack of graphite and reinforcement of treated region. Results also indicated the sample with fastigiated units was more effective than that with vertical units or parallel units to the wear direction. Influence of the sample unit’s angle which intensely depended on the conditions of actual application, however, was not identified.
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This article was supported by Project 985 - High Performance Materials of Jilin University and the Project 985 - Bionic Engineering Science and Technology Innovation and National Natural Science Foundation of China (No. 51275200).
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Chen, ZK., Zhou, T., Zhang, Hf. et al. Influence of Orientations of Bionic Unit Fabricated by Laser Remelting on Fatigue Wear Resistance of Gray Cast Iron. J. of Materi Eng and Perform 24, 2511–2520 (2015). https://doi.org/10.1007/s11665-015-1499-9
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DOI: https://doi.org/10.1007/s11665-015-1499-9