Effect of Spraying Angle on Microstructure and Sand Abrasion Resistance of Nano WC-10Co4Cr Coatings Prepared by Internal HVOF AITranslate
Abstract AITranslate
Nano WC-10 Co4 Cr coatings were prepared on ZG0 Cr13 Ni5 Mo stainless steel substrate by internal oxygen-propane high-velocity oxygen-fuel(HVOF)spraying,and the effects of spraying angle of 45°and 90°internal guns on the microstructure and performance of the coatings were studied.The phase composition and microstructure of the coatings prepared at different spraying angles were analyzed by X-ray diffractometer(XRD)and scanning electron microscope(SEM),and the microhardness and porosity of the coatings were measured by Vickers hardness tester and metalloscope.The surface roughness and 3 D morphology of the coatings were tested by roughometer and optical profilometer,and the sand abrasion resis-tance of the coating and the substrate was also comparatively studied by abrasion tester.The results show the main phases of the nano WC-10 Co4 Cr coatings prepared by 45°and 90°internal guns are WC,W2C and amorphous CoCr alloy,and the small spraying angle easily results in stripy pore defects.The porosity of both groups of coatings increases with the decrease of spraying angle while the microhardness decreases with the decrease of spraying angle,and their hardness reaches the peak of 1313 HV0.2 and 1383 HV0.2 respectively at 90°spraying angle.The surface roughness of the coatings increases with the decrease of spraying angle,and the sand abrasion resistance of the coatings increases with the increase of spraying angle.When vertically sprayed,both groups of coatings get the highest abrasion resistance which is 7.12 times and 5.39 times of the substrate,respectively.The nano WC-10 Co4 Cr coating prepared by internal HVOF at the spraying angle above 40°could preserve good microstructure and performance,which proves the fact that the internal HVOF is suitable for the spraying strengthening in narrow internal space of workpiece.
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-10 Co4 Cr coatings were prepared on ZG0 Cr13 Ni5 Mo stainless steel substrate by internal oxygen-propane high-velocity oxygen-fuel(HVOF)spraying,and the effects of spraying angle of 45°and 90°internal guns on the microstructure and performance of the coatings were studied.The phase composition and microstructure of the coatings prepared at different spraying angles were analyzed by X-ray diffractometer(XRD)and scanning electron microscope(SEM),and the microhardness and porosity of the coatings were measured by Vickers hardness tester and metalloscope.The surface roughness and 3 D morphology of the coatings were tested by roughometer and optical profilometer,and the sand abrasion resis-tance of the coating and the substrate was also comparatively studied by abrasion tester.The results show the main phases of the nano WC-10 Co4 Cr coatings prepared by 45°and 90°internal guns are WC,W2C and amorphous CoCr alloy,and the small spraying angle easily results in stripy pore defects.The porosity of both groups of coatings increases with the decrease of spraying angle while the microhardness decreases with the decrease of spraying angle,and their hardness reaches the peak of 1313 HV0.2 and 1383 HV0.2 respectively at 90°spraying angle.The surface roughness of the coatings increases with the decrease of spraying angle,and the sand abrasion resistance of the coatings increases with the increase of spraying angle.When vertically sprayed,both groups of coatings get the highest abrasion resistance which is 7.12 times and 5.39 times of the substrate,respectively.The nano WC-10 Co4 Cr coating prepared by internal HVOF at the spraying angle above 40°could preserve good microstructure and performance,which proves the fact that the internal HVOF is suitable for the spraying strengthening in narrow internal space of workpiece.
quote
| GB/T 7714-2015 | [1] ZHANG Lei, CAO Wen-jing, HUO Jia-xiang, et al. Effect of Spraying Angle on Microstructure and Sand Abrasion Resistance of Nano WC-10Co4Cr Coatings Prepared by Internal HVOF[J]. Rare Metals and Cemented Carbides, 2022(5): 52-58. |
| MLA | [1] ZHANG Lei, et al., "Effect of Spraying Angle on Microstructure and Sand Abrasion Resistance of Nano WC-10Co4Cr Coatings Prepared by Internal HVOF." Rare Metals and Cemented Carbides, no. 5, 2022, pp. 52-58. |
| APA | [1] ZHANG Lei, CAO Wen-jing, HUO Jia-xiang, ZHANG Kai, PANDEY Roshan, & CHEN Xiao-ming. (2022). Effect of Spraying Angle on Microstructure and Sand Abrasion Resistance of Nano WC-10Co4Cr Coatings Prepared by Internal HVOF. Rare Metals and Cemented Carbides(5), 52-58. |
| IEEE | [1] ZHANG Lei, CAO Wen-jing, HUO Jia-xiang, ZHANG Kai, PANDEY Roshan, and CHEN Xiao-ming, "Effect of Spraying Angle on Microstructure and Sand Abrasion Resistance of Nano WC-10Co4Cr Coatings Prepared by Internal HVOF," Rare Metals and Cemented Carbides, no. 5, pp. 52-58, 2022. keywords: {nano WC-10Co4Cr coating;high-velocity oxygen-fuel(HVOF)spraying;internal gun;spraying angle;microstructure;microhardness;sand abrasion} |