Abstract
Effects of Sn and Nb additions on the microstructure and wear behavior of a gray cast iron (GCI) have been investigated in details. The results showed that the combined additions of Sn and Nb not only promote the generation of pearlite and type-A graphite but also refine the graphite flakes size and the pearlite lamellar spacing. The analysis results of wear test indicated that the GCI-Sn–Nb sample with higher hardness (201 HB) yields a decreased mass loss by 63% compared to the GCI sample. Moreover, the GCI sample displays a severe wear in which some larger crater and a coarser surface can be observed, while the wear morphology of the GCI-Sn–Nb sample looked smooth, and the crater was smaller than the others. Under the present wear test condition, the combined additions of Sn and Nb are likely to improve the wear resistance of gray cast iron. The enhanced wear resistance of GCI-Sn–Nb sample was closely correlated to the increased hardness caused by the increase in pearlite content and the refinement of the graphite flakes size and the pearlite lamellar spacing.
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The authors acknowledge the financial support from the Innovation and Entrepreneurship Training Program for Undergraduates of Shaanxi Province (S201911736047).
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Li, Q., Zhang, Y., Zhang, Y. et al. Influence of Sn and Nb additions on the microstructure and wear characteristics of a gray cast iron. Appl. Phys. A 126, 282 (2020). https://doi.org/10.1007/s00339-020-03468-8
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DOI: https://doi.org/10.1007/s00339-020-03468-8