| ZHAO Li,ZHOU Xiao-ping.Microstructure and Properties of Ternary Boride Cermet Coatings by In-duction Heating[J],45(9):106-111 |
| Microstructure and Properties of Ternary Boride Cermet Coatings by In-duction Heating |
| Received:January 30, 2016 Revised:September 20, 2016 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2016.09.017 |
| KeyWord:induction heating ternary boride cermets coating |
| Author | Institution |
| ZHAO Li |
School of Material and Chemical Engineering, Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan , China |
| ZHOU Xiao-ping |
School of Material and Chemical Engineering, Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan , China |
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| Abstract: |
| Objective To research the influence of induction heating on the microstructure and properties of ternary boride Mo2FeB2 cermet coatings. Methods Ni60 viscous sublayer was first sprayed on the surface of 45＃ steel by the oxygen-acetylene flame. Then the ternary boride cermet coatings were sprayed on the surface of viscous sublayer by reaction flame spraying technology. Last, ternary boride coatings were heated using induced current. By X-ray diffraction (XRD), scanning electron microscope, bonding strength test, microhardness and wear test, the phase composition, microstructure, bonding strength, hardness and wear resistance of the ternary boride coating were analyzed and evaluated after heat treatment. Results After induction heating processing, metal ceramic coating was still composed of Mo2FeB2 and base phase alpha Fe. The pore and crack of ternary boride coating and Ni60 coating and between Ni60 and base metal almost disappeared. The bonding strength of ternary boride coating and the base metal achieved to an average of 60.48 MPa, 4.6 times of that without heating treatment. Microhardness of ternary boride layer was 300hv0.1 higher than the coating without heating treatment; and the wear rate was 0.83 mg/mm2, 68% of the coating without heating treatment. Conclusion After the induction heating process, the phase composition of ternary boride coating is the same with that of the coating without heating treatment. The organization of ternary boride coating and viscous sublayer are much denser; the bond strength, microhardness and wear resistance are significantly improved. |
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