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| Study on performance of wear-resistant coating for boiler with supersonic active arc spraying |
| FU Li1,2,3，CHEN Xiao-ming1,2,3，LIU Wei2,3，MA Hong-hai2,3 |
（1. Water Conservancy Machinery and Remanufacturing Technology Engineering Laboratory?of?ZhejiangProvince， Hangzhou 310012， China
2. Standard and Quality Control Research Institute， Ministry of Water Resources， Hangzhou 310012， China
3. Hangzhou Institute of Mechanical Design， Ministry of Water Resources， Hangzhou 310012， China） |
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Abstract Using FeCrNiBSi wire as coating material， the coating with high bonding strength and strong wear resistance was prepared on the surface of the industrial boiler with supersonic active arc spraying system on Q235 steel substrate. The porosity， microhardness， bonding strength and wear resistance of FeCrNiBSi coating were evaluated by metallographic observation， tensile test， friction and wear test. The microstructure and wear morphology of the coating were also observed by scanning electron microscope. The results show that the coating has good adhesion to the substrate， no separation is found at the interface. The coating structure is relatively dense with porosity of 0.71% and hardness of 720 HV0.3. The bonding strength between the coating and the matrix is 60 MPa. Compared to Q235 steel， FeCrNiBSi coating has excellent wear resistance， which is 28 times that of Q235 steel. The wear mechanism of FeCrNiBSi coating is micro-ploughing and adhesive wear. The coating has good wear resistance and good application prospect.
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Received: 15 August 2016
Published: 27 February 2018
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2018, Vol. 28 
