Influence of Process Parameters on Microstructure and Performance of Nano WC-CoCr Coatings Prepared by Oxygen-Propane HVOF AITranslate
Abstract AITranslate
Nano WC-10 Co4 Cr coatings were prepared on ZG06 Cr13 Ni5 Mo stainless steel by using oxygen-propane HVOF,and the effects of process parameters on microstructure and performance of the coatings were studied.The phase composition and microstructure of the coatings were characterized by XRD and SEM,and the microhardness and porosity were measured by Vickers hardness tester and metallographic analyzer.The sand erosion resistance of the coatings was tested in slurry and their sand erosion wear me-chanism was analyzed.The results show that the main phases of WC-10 Co4 Cr coatings prepared under different process conditions are WC,W2C and amorphous CoCr.The phase content is greatly affected by propane flow rate.The coatings are mainly composed of CoCr metallic bonding phase and multiscale micron-nanostructured WC hard particles,as well as some defects such as micropores and microcracks.The porosity of the coatings decreases with the increase of propane flow rate and spraying angle,and decreases at first and then increases with the increase of powder feeding rate and spraying distance.The microhardness of the coatings increases at first and then decreases with the increase of propane flow rate,powder feeding rate and spraying distance,and increases with the expansion of spraying angle.The optimum process parameters are as follows:propane flow rate of 68 L/min,powder feeding rate of 45~55 g/min,spraying distance of 250 mm,and spraying angle of 90°.The maximum sand erosion resistance of nano WC-10 Co4 Cr coatings reaches 14.26 times that of stainless steel substrate,and their sand erosion wear mechanism is mainly fatigue flaking with alternating stress.
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Basic Information:
DOI：
Chinese Library Classification Number:TG174.44[金属学及工艺—金属表面处理]
Citation Information:
Nano WC-10 Co4 Cr coatings were prepared on ZG06 Cr13 Ni5 Mo stainless steel by using oxygen-propane HVOF,and the effects of process parameters on microstructure and performance of the coatings were studied.The phase composition and microstructure of the coatings were characterized by XRD and SEM,and the microhardness and porosity were measured by Vickers hardness tester and metallographic analyzer.The sand erosion resistance of the coatings was tested in slurry and their sand erosion wear me-chanism was analyzed.The results show that the main phases of WC-10 Co4 Cr coatings prepared under different process conditions are WC,W2C and amorphous CoCr.The phase content is greatly affected by propane flow rate.The coatings are mainly composed of CoCr metallic bonding phase and multiscale micron-nanostructured WC hard particles,as well as some defects such as micropores and microcracks.The porosity of the coatings decreases with the increase of propane flow rate and spraying angle,and decreases at first and then increases with the increase of powder feeding rate and spraying distance.The microhardness of the coatings increases at first and then decreases with the increase of propane flow rate,powder feeding rate and spraying distance,and increases with the expansion of spraying angle.The optimum process parameters are as follows:propane flow rate of 68 L/min,powder feeding rate of 45~55 g/min,spraying distance of 250 mm,and spraying angle of 90°.The maximum sand erosion resistance of nano WC-10 Co4 Cr coatings reaches 14.26 times that of stainless steel substrate,and their sand erosion wear mechanism is mainly fatigue flaking with alternating stress.
quote
| GB/T 7714-2015 | [1] ZHANG Lei, HUO Jia-xiang, ZHAO Jian, et al. Influence of Process Parameters on Microstructure and Performance of Nano WC-CoCr Coatings Prepared by Oxygen-Propane HVOF[J]. Rare Metals and Cemented Carbides, 2021(4): 15-22. |
| MLA | [1] ZHANG Lei, et al., "Influence of Process Parameters on Microstructure and Performance of Nano WC-CoCr Coatings Prepared by Oxygen-Propane HVOF." Rare Metals and Cemented Carbides, no. 4, 2021, pp. 15-22. |
| APA | [1] ZHANG Lei, HUO Jia-xiang, ZHAO Jian, FU Li, ROSHAN Pandey, LIU De-you, & CHEN Xiao-ming. (2021). Influence of Process Parameters on Microstructure and Performance of Nano WC-CoCr Coatings Prepared by Oxygen-Propane HVOF. Rare Metals and Cemented Carbides(4), 15-22. |
| IEEE | [1] ZHANG Lei, HUO Jia-xiang, ZHAO Jian, FU Li, ROSHAN Pandey, LIU De-you, and CHEN Xiao-ming, "Influence of Process Parameters on Microstructure and Performance of Nano WC-CoCr Coatings Prepared by Oxygen-Propane HVOF," Rare Metals and Cemented Carbides, no. 4, pp. 15-22, 2021. keywords: {nano coating;WC-10Co4Cr;oxygen-propane HVOF;porosity;microhardness;sand erosion} |