Influence of Spraying Distance on the Microstructure and Slurry Erosion Resistance of Nano WC-10Co4Cr Coating Prepared by Internal HVOF AITranslate
Abstract AITranslate
Nano WC-10Co4Cr coatings were prepared on ZG0Cr13Ni5Mo stainless steel by internal oxygen-propane HVOF spraying,and the effects of spraying distance on the macro/micro structure and slurry erosion resistance of the coatings were investigated by two types of internal guns at 45°and 90°.The phase composition of the coatings was measured by X-ray diffraction(XRD),the microstructure of cross section of the coatings was observed by scanning electron microscope(SEM),and the porosity was analyzed by metallographic microscope.The microhardness of the coatings was measured by Vickers hardness tester while the surface roughness and 3D morphology were characterized using roughness meter and optical profilometer.The slurry erosion resistance of the coatings and stainless steel substrate was compared using slurry erosion tester,and the erosion wear mechanism was analyzed by SEM.The results show that the main phase composition of the coatings prepared by 45°and 90°internal guns consists of WC,W2C and amorphous CoCr alloy phases,which are not affected by the spraying distance.Short spraying distances result in the formation of pores defects in the coatings and the porosity initially decreases and then increases with the increase of spraying distance.Though the microhardness of the coating prepared by the 90°spray gun receives minimal influence from the spraying distance,the coating microhardness of the 45°spray gun shows a decreasing trend after the spraying distance increases to 150 mm,and the maximum hardness va-lues of the coatings prepared by the two spray guns are 1343.1 HV0.2and 1275.4 HV0.2,respectively.For both guns,short spraying distances lead to the formation of raised agglomeration particles on the coating surface,while the roughness decreases with the increasing spraying distance.With the increase of the spraying distance,the erosion resistance of the coatings increases at first and then decreases gradually,and the highest erosion resistance of the coatings prepared by 45°and 90°internal guns is achieved at the spraying distances of 200 mm and 250 mm,respectively,corresponding to 7.03 times and 8.05 times that of the substrate.The slurry erosion wear mechanism of nano WC-10Co4Cr coatings is mainly attributed to fatigue spalling under alternating stress,and that of stainless steel substrate is slurry micro-cutting.
KeyWords AITranslate
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Basic Information:
DOI：
Chinese Library Classification Number:TG174.4[金属学及工艺—金属表面处理]
Citation Information:
Nano WC-10Co4Cr coatings were prepared on ZG0Cr13Ni5Mo stainless steel by internal oxygen-propane HVOF spraying,and the effects of spraying distance on the macro/micro structure and slurry erosion resistance of the coatings were investigated by two types of internal guns at 45°and 90°.The phase composition of the coatings was measured by X-ray diffraction(XRD),the microstructure of cross section of the coatings was observed by scanning electron microscope(SEM),and the porosity was analyzed by metallographic microscope.The microhardness of the coatings was measured by Vickers hardness tester while the surface roughness and 3D morphology were characterized using roughness meter and optical profilometer.The slurry erosion resistance of the coatings and stainless steel substrate was compared using slurry erosion tester,and the erosion wear mechanism was analyzed by SEM.The results show that the main phase composition of the coatings prepared by 45°and 90°internal guns consists of WC,W2C and amorphous CoCr alloy phases,which are not affected by the spraying distance.Short spraying distances result in the formation of pores defects in the coatings and the porosity initially decreases and then increases with the increase of spraying distance.Though the microhardness of the coating prepared by the 90°spray gun receives minimal influence from the spraying distance,the coating microhardness of the 45°spray gun shows a decreasing trend after the spraying distance increases to 150 mm,and the maximum hardness va-lues of the coatings prepared by the two spray guns are 1343.1 HV0.2and 1275.4 HV0.2,respectively.For both guns,short spraying distances lead to the formation of raised agglomeration particles on the coating surface,while the roughness decreases with the increasing spraying distance.With the increase of the spraying distance,the erosion resistance of the coatings increases at first and then decreases gradually,and the highest erosion resistance of the coatings prepared by 45°and 90°internal guns is achieved at the spraying distances of 200 mm and 250 mm,respectively,corresponding to 7.03 times and 8.05 times that of the substrate.The slurry erosion wear mechanism of nano WC-10Co4Cr coatings is mainly attributed to fatigue spalling under alternating stress,and that of stainless steel substrate is slurry micro-cutting.
quote
| GB/T 7714-2015 | [1] ZHANG Lei, ZHANG Kai, HUO Jia-xiang, et al. Influence of Spraying Distance on the Microstructure and Slurry Erosion Resistance of Nano WC-10Co4Cr Coating Prepared by Internal HVOF[J]. Rare Metals and Cemented Carbides, 2023(5): 36-43. |
| MLA | [1] ZHANG Lei, et al., "Influence of Spraying Distance on the Microstructure and Slurry Erosion Resistance of Nano WC-10Co4Cr Coating Prepared by Internal HVOF." Rare Metals and Cemented Carbides, no. 5, 2023, pp. 36-43. |
| APA | [1] ZHANG Lei, ZHANG Kai, HUO Jia-xiang, ROSHAN Pandey, & CHEN Xiao-ming. (2023). Influence of Spraying Distance on the Microstructure and Slurry Erosion Resistance of Nano WC-10Co4Cr Coating Prepared by Internal HVOF. Rare Metals and Cemented Carbides(5), 36-43. |
| IEEE | [1] ZHANG Lei, ZHANG Kai, HUO Jia-xiang, ROSHAN Pandey, and CHEN Xiao-ming, "Influence of Spraying Distance on the Microstructure and Slurry Erosion Resistance of Nano WC-10Co4Cr Coating Prepared by Internal HVOF," Rare Metals and Cemented Carbides, no. 5, pp. 36-43, 2023. keywords: {internal HVOF;spraying distance;spraying angle;nano WC-10Co4Cr coating;slurry erosion resistance;erosion mechanism} |