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Non-Vacuum Sintering Process of WC/W2C Reinforced Ni-Based Coating on Steel
KTH, Skolan för industriell teknik och management (ITM), Maskinkonstruktion (Inst.), Tribologi. Zhengzhou Univ, Sch Mat Sci & Engn, Peoples R China.ORCID-id: 0000-0001-7560-6232
2016 (engelsk)Inngår i: Metals and Materials International, ISSN 1598-9623, E-ISSN 2005-4149, Vol. 22, nr 2, s. 311-318Artikkel i tidsskrift (Fagfellevurdert) Published
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Abstract [en]

Ni-based composite coatings containing varied contents of tungsten carbides on low carbon steel were fabricated. Effects of sintering temperature and tungsten carbides contents on the surface, interface, microstructure and wear resistance of the coatings were investigated using scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, Vickers microhardness tester, bulk hardness tester and pin-on-disc tribometer. The results indicated that with appropriate sintering temperature (1230 degrees C), smooth coating surfaces can be achieved. Favorable interfaces about 200 mu m can be got that both the chemical composition and property of the interfacial region showed gradual transitions from the substrates to the coatings. Microstructure of the coatings consists of tungsten carbides and M7C3/M23C6 in the matrix. With excessive sintering temperature, tungsten carbides tend to dissolve. Ni-based coatings containing tungsten carbides showed much higher level of bulk hardness and wear resistance than ISO Fe360A and ASTM 1566 steels. With increasing contents of tungsten carbides from 25% to 40%, bulk hardness of Ni-based coatings gradually increased. Ni-based coating with 35% tungsten carbides performed the best wear resistance.

sted, utgiver, år, opplag, sider
KOREAN INST METALS MATERIALS , 2016. Vol. 22, nr 2, s. 311-318
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coating, sintering, scanning electron microscopy (SEM), X-ray diffraction, wear
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URN: urn:nbn:se:kth:diva-184546DOI: 10.1007/s12540-016-5462-6ISI: 000371651300020Scopus ID: 2-s2.0-84961191244OAI: oai:DiVA.org:kth-184546DiVA, id: diva2:917295
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QC 20160406

Tilgjengelig fra: 2016-04-06 Laget: 2016-04-01 Sist oppdatert: 2017-11-30bibliografisk kontrollert

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