| METALS AND METAL MATRIX COMPOSITES |
|
|
|
|
|
Microstructure and Properties of the Cermet Coating Prepared by Spraying
Multimodal WC-17Co Powders Using HVOF Technique |
| CHEN Xiao1,2, BAI Xiaobo2, WANG Hongtao2, JI Gangchang2
|
1 Xinyu Key Laboratory of Materials Technology and Application for Intelligent Manufacturing, Xinyu University, Xinyu 338004;
2 Jiangxi Province Engineering Research Center of Materials Surface Enhancing & Remanufacturing, Jiujiang University, Jiujiang 332005 |
|
|
|
|
Abstract The purpose of the present work is to explore the microstructure and properties of the HVOF (high velocity oxygen fuel) sprayed cermet coa-ting of WC-17Co. We conducted the preparation of the cermet coatings under various oxygen flow rates (322 L/min,402 L/min,482 L/min and 543 L/min) by spraying and depositing multimodal WC-17Co powders (60% nano-WC and 40% micro-WC) onto Q235 steel substrate, and characterized and determined the coatings’ microstructures, phase compositons, microhardness values and wear resistance performances by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), hardness test and abrasion test, respectively. The results showed that the decrease of the oxygen flow rate could cause more serious decomposition of WC phase, and WC phase content reaches the minimum value at the oxygen flow rate of 322 L/min. It could also be concluded that the oxygen flow rate had significant influences on the contents of W, W2C, Co3W3C phases (inverse correlation), the microhardness (positive correlation), and the wear resistance performance (positive correlation) of the resultant coating. When the oxygen flow rate during HVOF spraying process was controlled at 543 L/min, the sprayed coating had a composition principally of WC phase, a maximum microhardness value ((979±52.9)Hv0.3), as well as a small weight loss ((6.6±0.57) mg) after wear testing.
|
|
Published: 11 March 2019
|
|
|
| Fund:This work was financially supported by the National Natural Science Foundation of China (51861012,51561013), the Science Technology Project of Jiangxi Province (20171BAB206007), Science and Technology Project of Jiangxi Educational Bureau (GJJ171062), and Base & Talent/Outstanding Young Talent Program of Jiujiang Science and Technology (2012[84],2015[64]). |
|
|
| 1 |
Khameneh Asl S H, Heydarzadeh Sohi M, Hokamoto K, et al. Wear,2006,260(11-12),1203.2 Zhou K X, Deng C M, Liu M, et al. Rare Metal Materials and Enginee-ring,2009,38(4),671(in Chinese).周克崧,邓春明,刘敏,等.稀有金属材料与工程,2009,38(4),671.3 Fu Y Q, Zhou F, Gao Y, et al. Rare Metal Materials and Engineering,2007,36(s2),731(in Chinese).傅迎庆,周锋,高阳,等.稀有金属材料与工程,2007,36(s2),731.4 Shtertser A, Muders C, Veselov S, et al. Surface & Coatings Technology,2012,206(23),4763.5 Ma N, Cheng Z X, Wu H T, et al. Rare Metal Materials and Enginee-ring,2015,44(12),3219(in Chinese).马宁,程振雄,乌焕涛,等.稀有金属材料与工程,2015(12),3219.6 Wood R J K. International Journal of Refractory Metals & Hard Mate-rials,2009,28(1),82.7 Chivavibul P, Watanabe M, Kuroda S, et al. Surface & Coatings Technology,2007,202(3),509.8 Cho T Y, Yoon J H, Kim K S, et al. Surface & Coatings Technology,2008,202(22-23),5556.9 Watanabe M, Owada A, Kuroda S, et al. Surface & Coatings Technology,2006,201(3-4),619.10 Yang X, Ye F X, Cui C, et al. Thermal Spray Technology,2009,1(2),53(in Chinese).杨雪,叶福兴,崔崇,等.热喷涂技术,2009,1(2),53.11 Wang Q, Chen Z H, Li L X, et al. Surface & Coating Technology,2012,206,2233.12 Stewart D A, Shipway P H, Mccartney D G. Acta Materialia,2000,48(7),1593.13 Zhu J, Liu Y, Ye J W, et al. Journal of Functional Materials,2012,42(23),3204(in Chinese).朱军,刘颖,叶金文,等.功能材料,2012,42(23),3204.14 Wang D F, Zhang B P, Jia C C, et al. Powder Metallurgy Technology,2017,35(2),118.王大峰,张波萍,贾成厂,等.粉末冶金技术,2017,35(2),118.
|
|
|
|
渝公网安备50019002502923号 © Editorial Office of Materials Reports.
2019, Vol. 33 
