Title: Improvement in dry-sliding wear properties and corrosion resistance of AISI 304 steel with low temperature gaseous nitriding

Authors: Y.Y. Chen; Jin Quan Sun; Qing Kun He; Fei Ma; Yong Jun Cao; Xiang Gao; Sheng Tang Zhang; Kun Xie

Addresses: Department of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266510, China ' Department of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266510, China ' Department of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266510, China ' Academy of Machinery Science and Technology, Qingdao Branch 266510, China ' Department of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266510, China ' Porite Yangzhou Technology and Industrial Co Ltd., Yangzhou 225000, China ' Department of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266510, China ' Department of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266510, China

Abstract: AISI 304 stainless steel samples were treated by gaseous nitriding at 430°C and 560°C in order to obtain a single S-phase and a multiple phases of CrN as well as Fe4N nitride layer, respectively. The structural phases, micro-hardness and dry-sliding wear behaviour of were investigated by optical microscopy, X-ray diffraction, scanning electron microscopy, electron probe of microanalysis, Vickers indentation tester and ball-on-flat wear tester. Besides, the corrosion properties were tested by means of potentiodynamic polarisation testing in 3.5% NaCl solution. The results show that the S-phase layers exhibited a better wear resistance as well as corrosion resistance. Meanwhile, multiple phases also showed a good wear resistance, except a deteriorated corrosion resistance. Wear of the substrate AISI 304 steel was severe and characterised by strong adhesion, abrasion and peeling off, whilst wear of the nitrided samples was mild and dominated by plastic deformation, slight abrasion.

Keywords: gaseous nitriding; AISI 304 austenitic stainless steel; wear resistance; corrosion resistance.

DOI: 10.1504/IJMATEI.2018.096040

International Journal of Materials Engineering Innovation, 2018 Vol.9 No.3, pp.218 - 239

Received: 01 Dec 2017
Accepted: 05 Feb 2018
Published online: 09 Nov 2018 *

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