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Influence of carbon pre-coating prior to laser deposition on rolling contact fatigue of gray cast iron

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Abstract

This work presented a study on the improvement of laser surface treatment on rolling contact fatigue resistance of gray cast iron. Sample surface covered with carbon powder was coupled with localized treatment by high-energy laser beam—a process defined as “laser cladding (LC).” With this method, the optimum precoating thickness was experimentally studied. Compared to the region treated by laser remelting, the crystal in LC region was finer, more compact, and uniform. Mechanical property testing showed not only high micro-hardness of LC region, but also improved tensile and compressive resistance of treated material. Fatigue wear tests and thorough analysis of fatigue detects suggested that LC treatment significantly improved fatigue wear resistance (FWR). Improved FWR was likely facilitated by delayed initiation and propagation of cracks, as well as the reduction of contact stress on substrate. Additionally, formations of fatigue defects on sample surface were thoroughly discussed.

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ACKNOWLEDGMENTS

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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Authors and Affiliations

  1. The Key Lab of Automobile Materials, The Ministry of Education, Jilin University, Changchun, Jilin Province, 130025, People’s Republic of China

    Zhikai Chen, Ruoyu Zhao, Wanshi Yang, Hong Zhou & Peng Zhang

  2. The Department of Mechanical and Automotive Engineering, Jilin University, Changchun, Jilin Province, 130025, People’s Republic of China

    Ti Zhou

  3. The Department of Mechanical and Automotive Engineering, Changchun University, Changchun, Jilin Province, 130028, People’s Republic of China

    Haifeng Zhang

  4. The Key Lab of Terrain Machinery Bionics Engineering, The Ministry of Education, Jilin University, Changchun, Jilin Province, 130025, People’s Republic of China

    Luquan Ren

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  1. Zhikai Chen
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  2. Ti Zhou
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  3. Ruoyu Zhao
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  6. Hong Zhou
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  7. Peng Zhang
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Correspondence to Peng Zhang.

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Chen, Z., Zhou, T., Zhao, R. et al. Influence of carbon pre-coating prior to laser deposition on rolling contact fatigue of gray cast iron. Journal of Materials Research 30, 3104–3115 (2015). https://doi.org/10.1557/jmr.2015.288

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  • DOI: https://doi.org/10.1557/jmr.2015.288

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