Study on wear resistance of WC-Co and NiCr-Cr2C3 coatings sprayed by HVOF

Zhong Hua Jian; Zhuang Ma; Su Hong Cao; Fu Chi Wang; Quan Sheng Wang

Study on wear resistance of WC-Co and NiCr-Cr₂C₃ coatings sprayed by HVOF

Zhong Hua Jian^*, Zhuang Ma, Su Hong Cao, Fu Chi Wang, Quan Sheng Wang

^*Corresponding author for this work

School of Material Science and Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

WC-Co and NiCr-Cr₂C₃ coatings were prepared on 45 steel substrate by means of high velocity oxy-fuel spraying (HVOF). Coating porosity, micro-hardness and loss of coating in the sliding wear test with lubricant were studied. Profiles of the sliding wear coefficients were described and the wear mechanisms of coatings were discussed as well. The results show that both of coatings are compact and the porosities are 1.29% and 1.08%, the hardness of two coatings are 1140 HV and 950 HV under the press of 300 gram. Abrasion of two coatings are stable and friction coefficient are both 0.1 when the time is beyond 25 minutes. The main abrasion modes of WC-Co coatings are the fatigue desquamation and the micro-cutting and adhesive wear. Carbide flake and scratches of NiCr-Cr₂C₃ coating are serious and micro-cracks are enhanced greatly.

Original language	English
Pages (from-to)	21-24
Number of pages	4
Journal	Cailiao Gongcheng/Journal of Materials Engineering
Issue number	7
Publication status	Published - Jul 2007

Keywords

Friction coefficient
High velocity oxy-fuel spraying
NiCr-CrC
WC-Co

Cite this

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title = "Study on wear resistance of WC-Co and NiCr-Cr2C3 coatings sprayed by HVOF",

abstract = "WC-Co and NiCr-Cr2C3 coatings were prepared on 45 steel substrate by means of high velocity oxy-fuel spraying (HVOF). Coating porosity, micro-hardness and loss of coating in the sliding wear test with lubricant were studied. Profiles of the sliding wear coefficients were described and the wear mechanisms of coatings were discussed as well. The results show that both of coatings are compact and the porosities are 1.29% and 1.08%, the hardness of two coatings are 1140 HV and 950 HV under the press of 300 gram. Abrasion of two coatings are stable and friction coefficient are both 0.1 when the time is beyond 25 minutes. The main abrasion modes of WC-Co coatings are the fatigue desquamation and the micro-cutting and adhesive wear. Carbide flake and scratches of NiCr-Cr2C3 coating are serious and micro-cracks are enhanced greatly.",

keywords = "Friction coefficient, High velocity oxy-fuel spraying, NiCr-CrC, WC-Co",

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year = "2007",

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T1 - Study on wear resistance of WC-Co and NiCr-Cr2C3 coatings sprayed by HVOF

AU - Jian, Zhong Hua

AU - Ma, Zhuang

AU - Cao, Su Hong

AU - Wang, Fu Chi

AU - Wang, Quan Sheng

PY - 2007/7

Y1 - 2007/7

N2 - WC-Co and NiCr-Cr2C3 coatings were prepared on 45 steel substrate by means of high velocity oxy-fuel spraying (HVOF). Coating porosity, micro-hardness and loss of coating in the sliding wear test with lubricant were studied. Profiles of the sliding wear coefficients were described and the wear mechanisms of coatings were discussed as well. The results show that both of coatings are compact and the porosities are 1.29% and 1.08%, the hardness of two coatings are 1140 HV and 950 HV under the press of 300 gram. Abrasion of two coatings are stable and friction coefficient are both 0.1 when the time is beyond 25 minutes. The main abrasion modes of WC-Co coatings are the fatigue desquamation and the micro-cutting and adhesive wear. Carbide flake and scratches of NiCr-Cr2C3 coating are serious and micro-cracks are enhanced greatly.

AB - WC-Co and NiCr-Cr2C3 coatings were prepared on 45 steel substrate by means of high velocity oxy-fuel spraying (HVOF). Coating porosity, micro-hardness and loss of coating in the sliding wear test with lubricant were studied. Profiles of the sliding wear coefficients were described and the wear mechanisms of coatings were discussed as well. The results show that both of coatings are compact and the porosities are 1.29% and 1.08%, the hardness of two coatings are 1140 HV and 950 HV under the press of 300 gram. Abrasion of two coatings are stable and friction coefficient are both 0.1 when the time is beyond 25 minutes. The main abrasion modes of WC-Co coatings are the fatigue desquamation and the micro-cutting and adhesive wear. Carbide flake and scratches of NiCr-Cr2C3 coating are serious and micro-cracks are enhanced greatly.

KW - Friction coefficient

KW - High velocity oxy-fuel spraying

KW - NiCr-CrC

KW - WC-Co

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M3 - Article

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JO - Cailiao Gongcheng/Journal of Materials Engineering

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Study on wear resistance of WC-Co and NiCr-Cr₂C₃ coatings sprayed by HVOF

Abstract

Keywords

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