| LI Jun,FAN Jin-hui,XU Meng-kuo,ZHU Shi-gen.Electric Contact Strengthening of Flame Spraying Ni60/WC Coating on the Surface of 42CrMo Steel[J],45(9):65-70 |
| Electric Contact Strengthening of Flame Spraying Ni60/WC Coating on the Surface of 42CrMo Steel |
| Received:March 20, 2016 Revised:September 20, 2016 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2016.09.010 |
| KeyWord:oxyacetylene flame spraying ECS Ni60/WC coating interfacial bonding strength composite surface strengthening 42CrMo |
| Author | Institution |
| LI Jun |
Textile Equipment Education and Research Center, College of Mechanical Engineering, Donghua University, Shanghai , China |
| FAN Jin-hui |
Textile Equipment Education and Research Center, College of Mechanical Engineering, Donghua University, Shanghai , China |
| XU Meng-kuo |
Textile Equipment Education and Research Center, College of Mechanical Engineering, Donghua University, Shanghai , China |
| ZHU Shi-gen |
Textile Equipment Education and Research Center, College of Mechanical Engineering, Donghua University, Shanghai , China |
|
| Hits: |
| Download times: |
| Abstract: |
| Objective To study the effect of electric contact strengthening (ECS) on microstructure and properties of 42CrMo substrate surface coating after oxyacetylene flame spraying so as to improve the bonding strength between coating and substrate and the surface properties of the substrate. Methods Ni60/WC coating was prepared on the surface of 42CrMo steel by oxyacetylene flame spraying, and the coating was strengthened by ECS technology. The microstructure of coating and substrate was observed and analyzed by metallographic microscope, SEM and EDS. The hardness from coating surface to substrate was measured by vickers hardness tester. Data got before and after ECS were analyzed. Results With the flame spraying coating thickness controlled, dense coating got raised and the pore reduced significantly while the interface between the substrate and coating disappeared because of the binding mode changing after ECS by 15 kA current strength. After strengthening by ECS technology, the hardness uniformity was greatly improved and the Vickers hardness was improved from 400HV to 720HV. Dispersion strengthening appeared as the carbide phase was formed due to the Cr element’s gathering and W element’s diffusion. Conclusion The ECS technology can upgrade the performance and quality of the coating and change the binding mode of the interface. |
| Close |
|
|
|