Abstract
In this work, the mechanical properties and microstructures of vermicular graphite cast iron processed by selective laser surface alloying with ultra-fine ZrO2 ceramic particulates were investigated. A particulate-reinforced metal matrix composite coating with the thickness of ~650 μm was fabricated by laser treatment on the sample surface. The particulates were uniformly distributed in the microstructure of the coating. The tensile strength and microhardness both increased with the particulate fraction, since more tensile load was transferred from the matrix to the reinforcement showing essential strengthening effect. The composite coating also sharply reduced the wear mass loss and thus improved the wear resistance.
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Acknowledgments
This work was supported by Project 985-Bionic Engineering Science and Technology Innovation of Jilin University, the National Natural Science Foundation for Youths (No. 51205160), and the Pearl River S&T Nova Program of Guangzhou (No. 2014J2200095).
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Lin, PY., Zhang, ZH., Kong, SH. et al. Mechanical Properties of Vermicular Graphite Cast Iron Processed by Selective Laser Surface Alloying with Ultra-fine ZrO2 Ceramic Particulates. Acta Metall. Sin. (Engl. Lett.) 29, 985–992 (2016). https://doi.org/10.1007/s40195-016-0446-6
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DOI: https://doi.org/10.1007/s40195-016-0446-6