Microstructure, Friction and Wear Properties of HVOF Sprayed WC-10Co-4Cr Coating

WC-10Co-4Cr coating was prepared on Q235 steel substrate by high velocity oxygen fuel (HVOF) spray process. The microstructure and wear properties of the WC-10Co-4Cr coating were investigated by transmission electron microscopy(TEM), scanning electron microscopy(SEM), X-ray diffraction(XRD), microha...

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Published inCai liao gong cheng = Journal of materials engineering Vol. 46; no. 5; p. 120
Main Authors Yang, Wei-hua, Wu, Yu-ping, Hong, Sheng, Li, Jia-hui, Li, Bo-tao
Format Journal Article
LanguageChinese
Published Beijing Beijing Institute of Aeronautical Materials 01.05.2018
Subjects
Abrasion
Abrasive wear
Abrasives
Cold work tool steels
Flame spraying
High velocity oxyfuel spraying
Killed steels
Microhardness
Microscopy
Microstructure
Porosity
Properties (attributes)
Scanning electron microscopy
Substrates
Transmission electron microscopy
Tungsten carbide
Wear mechanisms
X-ray diffraction
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Summary:WC-10Co-4Cr coating was prepared on Q235 steel substrate by high velocity oxygen fuel (HVOF) spray process. The microstructure and wear properties of the WC-10Co-4Cr coating were investigated by transmission electron microscopy(TEM), scanning electron microscopy(SEM), X-ray diffraction(XRD), microhardness tester and friction-abrasion testing machine. The results show that the coating exhibits dense structure with the porosity of 0.67% and compact bonding with the substrate. The coating is mainly composed of WC, and a small amount of W2C and amorphous phases as well, and the average microhardness of the coating is 1230HV0.3. The cumulative mass loss of WC-10Co-4Cr coating is only 2/5 of the cold work die steel Cr12MoV, which indicates the WC-10Co-4Cr coating exhibits better abrasive properties. The abrasive wear is the main wear mechanism for the coating.
ISSN:1001-4381
DOI:10.11868/j.issn.1001-4381.2016.000770