Influence of Treatment Sequence on Tribological Performance of Duplex Surface-Treated AISI 1045 Steel
来源期刊：Acta Metallurgica Sinica2019年第10期
论文作者：Farahnaz Haftlang Ali Habibolahzadeh
文章页码：1227 - 1236
摘 要：The surface of AISI 1045 steel specimens was modified via two duplex surface treatments of（i） titanium diffusion coating followed by plasma nitriding（Ti–PN） and（ii） plasma nitriding followed by titanium diffusion coating（PN–Ti）. A comparative study on the microstructure and wear properties of the fabricated TiN coatings was conducted. A scanning electron microscope equipped with energy-dispersive X-ray spectroscopy, X-ray diffractometer（XRD）, and pin-on-disk wear test was utilized to evaluate the microstructures, phases, and wear properties of the coatings. XRD patterns of duplex-treated specimens illustrated that the modified layer consisted of nitride and carbo-nitride phases such as TiN and TiC0.7N0.3. The results also showed that Ti–PN treatment led to a low friction coefficient and the lowest wear factors, as compared with the PN–Ti treatment. Oxidation and mild fatigue fracture wear were found to be the main wear mechanism of the Ti–PN coating. The wear mechanism in the PN–Ti specimen involved a higher oxidative wear regime followed by plastic deformation wear regimes.
Farahnaz Haftlang1，Ali Habibolahzadeh2
1. School of Metallurgy and Materials Engineering, College of Engineering,University of Tehran2. Department of Metallurgy and Materials Engineering,Faculty of Engineering,Semnan University
摘 要：The surface of AISI 1045 steel specimens was modified via two duplex surface treatments of（i） titanium diffusion coating followed by plasma nitriding（Ti–PN） and（ii） plasma nitriding followed by titanium diffusion coating（PN–Ti）. A comparative study on the microstructure and wear properties of the fabricated TiN coatings was conducted. A scanning electron microscope equipped with energy-dispersive X-ray spectroscopy, X-ray diffractometer（XRD）, and pin-on-disk wear test was utilized to evaluate the microstructures, phases, and wear properties of the coatings. XRD patterns of duplex-treated specimens illustrated that the modified layer consisted of nitride and carbo-nitride phases such as TiN and TiC0.7N0.3. The results also showed that Ti–PN treatment led to a low friction coefficient and the lowest wear factors, as compared with the PN–Ti treatment. Oxidation and mild fatigue fracture wear were found to be the main wear mechanism of the Ti–PN coating. The wear mechanism in the PN–Ti specimen involved a higher oxidative wear regime followed by plastic deformation wear regimes.
关键词：
