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Effect of bainite layer by LSMCIT on wear resistance of medium-carbon bainite steel at different temperatures

Xing, XL and Yuan, XM and Zhou, YF and Qi, XW and Lu, X and Xing, TH and Ren, XJ and Yang, QX Effect of bainite layer by LSMCIT on wear resistance of medium-carbon bainite steel at different temperatures. Surface and Coatings Technology. ISSN 0257-8972 (Accepted)

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Abstract

In this work, bainite layer was prepared by Laser surface melting combined with isothermal treatment (LSMCIT) at 250ºC. The microstructures of the samples were analyzed by scanning electron microscopy (SEM), X-ray Diffraction (XRD) and transmission electron microscopy (TEM). Their wear resistances at 20ºC, 100ºC and 200ºC were measured using reciprocating tribometer. After the wear test, the confocal laser scanning microscope and SEM were used to characterize the topography of all abrasion surfaces, and the phase transformations occurred on the contact surfaces were analyzed by XRD. The results show that the microstructure of the LSMCIT sample has been refined to nanoscale. The wear volume reduction ratio of LSMCIT sample is 40.9% at 20ºC. The wear resistances of the samples are decreased with increasing of the temperature, however, the decrease in amplitude of the bainite is relatively small. The harder surface of the LSMCIT sample can provides higher mechanical support, and the white-etching layer on surface are difficult to remove by the reciprocating friction. The wear resistances of the LSMCIT samples at 20ºC, 100ºC and 200ºC are excellent, which shows the wide temperature ranges in wear applications.

Item Type: Article
Uncontrolled Keywords: 0306 Physical Chemistry (Incl. Structural), 0912 Materials Engineering, 0204 Condensed Matter Physics
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TP Chemical technology
Divisions: Maritime and Mechanical Engineering
Publisher: Elsevier
Date Deposited: 23 Jun 2017 08:19
Last Modified: 07 Sep 2017 21:56
URI: http://researchonline.ljmu.ac.uk/id/eprint/6730

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