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Effects of Vanadium Addition on Microstructure and Tribological Performance of Bainite Hardfacing Coatings

Chen, J and Xing, X and Wang, Y and Zhou, Y and Ren, X and Yang, Y and Yang, Q (2015) Effects of Vanadium Addition on Microstructure and Tribological Performance of Bainite Hardfacing Coatings. JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 24 (3). pp. 1157-1164. ISSN 1059-9495

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Abstract

New hardfacing coatings with different vanadium (V) additions were prepared by surfacing technology. The microstructures of the hardfacing coatings were analyzed by field emission scanning electron microscope equipped with energy dispersive X-ray spectrometry and examined by transmission electron microscope. The hardness and wear resistances of the hardfacing coatings were measured. Worn debris were collected at the end of wear test and analyzed. The precipitation temperature of the phases in the hardfacing coatings and the mass fraction of MC carbide were calculated by Jmatpro software. The experimental results show that, the hardfacing coating mainly consists of granular bainite. No significant change in the size of linear martensite-austenite (M-A) islands is observed with the increase of V addition, while the size of massive M-A islands is decreased. The wear resistance of the hardfacing coating reaches a maximum level with V content of 0.14 wt.%. The calculated results show that, the mass fraction of MC carbide is increased with the increase of V content. Based on calculation following two-dimensional mismatch theory, MC carbide is a heterogeneous nucleus of the ferrite resulting refined ferrite in the hardfacing coating.

Item Type: Article
Additional Information: The final publication is available at Springer via http://dx.doi.org/10.1007/s11665-014-1363-3
Uncontrolled Keywords: 0912 Materials Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TF Railroad engineering and operation
Divisions: Maritime and Mechanical Engineering
Publisher: SPRINGER
Related URLs:
Date Deposited: 10 Jun 2016 07:58
Last Modified: 15 Nov 2016 11:26
DOI or Identification number: 10.1007/s11665-014-1363-3
URI: http://researchonline.ljmu.ac.uk/id/eprint/3736

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