| ZHANG Rui-zhu,ZHAO Yuan-yuan,YAN Da-kao,GUO Peng-yan,ZHANG Jie-xi,HAN Ting-ting,HUANG Rong-hao.Characterization of Electro-spark Cladding WC Coating on Surface of 1Cr18Ni9Ti Stainless Steel[J],44(4):84-88 |
| Characterization of Electro-spark Cladding WC Coating on Surface of 1Cr18Ni9Ti Stainless Steel |
| Received:November 16, 2014 Revised:April 20, 2015 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2015.04.015 |
| KeyWord:stainless steel electrospark cladding technique WC cladding coating microstructure wear resistance corrosion resistance |
| Author | Institution |
| ZHANG Rui-zhu |
North China University of Water Resources and Electric Power, Zhengzhou , China |
| ZHAO Yuan-yuan |
North China University of Water Resources and Electric Power, Zhengzhou , China |
| YAN Da-kao |
North China University of Water Resources and Electric Power, Zhengzhou , China |
| GUO Peng-yan |
North China University of Water Resources and Electric Power, Zhengzhou , China |
| ZHANG Jie-xi |
North China University of Water Resources and Electric Power, Zhengzhou , China |
| HAN Ting-ting |
North China University of Water Resources and Electric Power, Zhengzhou , China |
| HUANG Rong-hao |
North China University of Water Resources and Electric Power, Zhengzhou , China |
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| Abstract: |
| Objective To investigate the microstructure and properties of the WC coating on the surface of the 1Cr18Ni9Ti stainless steel prepared by electro-spark cladding technique. Methods The WC cladding coating was produced on the surface of stainless steel 1Cr18Ni9Ti by electro-spark cladding technique. The morphology, microstructure, microhardness and wear resistance of the cladding coating were investigated. The corrosion resistance of the cladding coating in 3. 5% NaCl solution was evaluated by linear polarization. Results The cladding coating was uniform, continuous, compact, and well metallurgically bonded with the substrate material. The highest microhardness was 1680HV0. 3 and the average hardness of the cladding coating was 1336HV0. 3, which was about 4 times higher than that of the substrate (260HV). The wear resistance of the cladding coating was 4 times as high as that of the substrate and the main wear mechanism was adhesive and abrasive wear. In the 3. 5% NaCl corroding liquor, the corrosion potential of the cladding coating moved reversely by 165 mV, and the breakdown potential of cladding coating was lower than that of the substrate, while the maintaining passive current density was higher than that of the substrate. Conclusion The cladding coating had high hardness and high wear resistance, and the main wear mechanism was adhesive and abrasive wear. However, in the 3. 5% NaCl corrosion system, the corrosion resistance of the1Cr18Ni9Ti stainless steel substrate was better than the cladding coating. |
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