| OU Xian,DENG Chang-guang,WANG Ri-chu,MAO Jie.Influences of the Supersonic Plasma Spraying Process on the Hardness Properties of Cr2O3 Coating[J],43(1):81-85,102 |
| Influences of the Supersonic Plasma Spraying Process on the Hardness Properties of Cr2O3 Coating |
| Received:September 03, 2013 Revised:October 23, 2013 |
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| DOI： |
| KeyWord:supersonic plasma spraying Cr2O3coating the orthogonal experiment microhardness microstructure |
| Author | Institution |
| OU Xian |
Guangzhou Research Institute of Non-ferrous Metals, Guangzhou , China;School of Material Science and Engineering, Central South University, Changsha , China |
| DENG Chang-guang |
Guangzhou Research Institute of Non-ferrous Metals, Guangzhou , China |
| WANG Ri-chu |
School of Material Science and Engineering, Central South University, Changsha , China |
| MAO Jie |
Guangzhou Research Institute of Non-ferrous Metals, Guangzhou , China |
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| Abstract: |
| Objective To prepare coating with high hardness, this paper studied the main factors influencing the hardness of Cr2O3 coating. Methods The influences of spraying distance and air pressure on the coating microstructure were studied by single variable method, and then the effects of three factors including spraying current, air pressure and spray distance on the hardness of Cr2O3 coating were investigated with orthogonal experiments. Results The results showed that the primary and secondary order of the Cr2O3 coating hardness by technical parameters was: air pressure, spray current, and then spraying distance. Conclusion The optimal combination of process parameters for high hardness coating was: air pressure 0. 4 MPa, spraying current 270 A, spraying distance 200 mm. The coating was dense, uniform and with low porosity. |
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