Effect of WC particle size on the microstructure and properties of WC-CoCr coatings prepared by high velocity oxy-fuel spraying
WANG Da-feng1，ZHANG Bo-ping1，JIA Cheng-chang1，GAO Feng2，YU Yue-guang2，ZHAO Xiao-lin1，BAI Zhi-hui2
1. School of Material Science and Engineering， University of Science and Technology Beijing， Beijing 100083， China 2. BGRIMM Advanced Materials Science &Technology Co.， Ltd.， Beijing General Research Institute of Mining and Metallurgy， Beijing 100160， China
Abstract：WC-CoCr coatings with three kinds of microstructure of nanostructure， bimodal and conventional were fabricated by HVOF spraying. The influence of WC particle size on decarburization， microstructure and mechanical properties of coatings were discussed. Results show that， with the WC particle size decreasing， the decarburization rate of coating increases， the content of W2C increases， the coating porosity decreases， the micro-hardness of the coating and bonding strength of the interface increases. Nevertheless， more serious amorphization of binder in the nanostructured coating causes significant fracture toughness deterioration. Bimodal WC-CoCr coating combines the best fracture toughness as well as higher micro-hardness and interfacial bonding strength since reasonable collocation and synergistic effect of nano-sized and submicron-sized WC particles.
王大锋，张波萍，贾成厂，高 峰，于月光，赵晓琳，白智辉. WC粉末粒度对超音速火焰喷涂WC-CoCr涂层组织性能的影响[J]. , 2017, 27(02): 58-65.
WANG Da-feng，ZHANG Bo-ping，JIA Cheng-chang，GAO Feng，YU Yue-guang，ZHAO Xiao-lin，BAI Zhi-hui. Effect of WC particle size on the microstructure and properties of WC-CoCr coatings prepared by high velocity oxy-fuel spraying. , 2017, 27(02): 58-65.
[1]吴旭，郭志猛. 铝合金表面爆炸喷涂WC-17Co涂层性能的研究[J].粉末冶金工业, 2013, 05:22-25[2]刘建金，崔照雯，李斌. 铜基体上超音速火焰喷涂WC-12Co涂层的摩擦磨损性能[J].粉末冶金技术, 2014, 03:190-194[3]Aw P K, Tan B H.Study of microstructure,phase and microhardness distribution of HVOF sprayed multi-modal structured and conventional WC–17Co coatings[J].Journal of Materials Processing Technology, 2006, 174(1-3):305-311[4]Ding Z, Wei C, Qun W.Resistance of cavitation erosion of multimodal WC-12Co coatings sprayed by HVOF[J].Transactions of Nonferrous Metals Society of China, 2011, 21(10):2231-2236[5] 马宁，程振雄，乌焕涛.粉末结构对HVOF喷涂WC-Co涂层组织性能的影响[J].稀有金属材料与工程, 2015, 12:3219-3223[6]丁彰雄，陈伟，王群. HVOF制备的多峰WC-12Co涂层摩擦磨损特性[J].摩擦学学报, 2011, 05:425-430[7] 高培虎，杨冠军，李毅功.双尺度结构WC-12Co涂层的冷喷涂制备[J].材料研究与应用, 2009, 01:44-48[8]Zhu Y, Yukimura K, Ding C, et al.Tribological properties of nanostructured and conventional WC-Co coatings deposited by plasma spraying[J].Thin solid films, 2001, 388(1):277-282[9]Yang Q, Senda T, Ohmori A.Effect of carbide grain size on microstructure and sliding wear behavior of HVOF-sprayed WC–12% Co coatings[J].Wear, 2003, 254(1-2):23-34[10]Shipway P H, Mccartney D G, Sudaprasert T.Sliding wear behaviour of conventional and nanostructured HVOF sprayed WC–Co coatings[J].Wear, 2005, 259(7-12):820-827[11]Watanabe M, Owada A, Kuroda S, et al.Effect of WC size on interface fracture toughness of WC-Co HVOF sprayed coatings[J].Surface and Coatings Technology, 2006, 201(3-4):619-627[12]Wang Q, Chen Z H, Ding Z X.Performance of abrasive wear of WC-12Co coatings sprayed by HVOF[J].Tribology International, 2009, 42(7):1046-1051[13]Wang Q, Chen Z, Li L, et al.The parameters optimization and abrasion wear mechanism of liquid fuel HVOF sprayed bimodal WC–12Co coating[J].Surface and Coatings Technology, 2012, 206(8-9):2233-2241[14]Chivavibul P, Watanabe M, Kuroda S, et al.Effects of carbide size and Co content on the microstructure and mechanical properties of HVOF-sprayed WC–Co coatings[J].Surface and Coatings Technology, 2007, 202(3):509-521[15]Wang D, Zhang B, Jia C, et al.Microstructure and tribological properties of plasma-sprayed WC-17 Co coatings with different carbide grain size distribution[J].Journal of the Japan Society of Powder and Powder Metallurgy, 2016, 63(7):688-696[16]Qiao Y, Fischer T E, Dent A.The effects of fuel chemistry and feedstock powder structure on the mechanical and tribological properties of HVOF thermal-sprayed WC-Co coatings with very fine structures[J].Surface and Coatings Technology, 2003, 172(1):24-41[17] Kumari K, Anand K, Bellacci M, et al.Effect of microstructure on abrasive wear behavior of thermally sprayed WC-10Co-4Cr coatings[J].Wear, 2010, 11-12(268):1309-1319[18] Evans A G, Wilshaw T R.Quasi-static solid particle damage in brittle solids-I. Observations analysis and implications[J].Acta Metallurgica, 1976, 10(24):939-956[19] Lekatou A, Sioulas D, Karantzalis A E, et al.A comparative study on the microstructure and surface property evaluation of coatings produced from nanostructured and conventional WC-Co powders HVOF-sprayed on Al7075[J].Surface and Coatings Technology, 2015, (276):539-556[20] Yuan J, Ma C, Yang S, et al.Improving the wear resistance of HVOF sprayed WC-Co coatings by adding submicron-sized WC particles at the splats' interfaces[J].[J]. Surface and Coatings Technology. 2016, 285: 17-23., 2016, (285):17-23[21] Liu S L, Zheng X P, Geng G Q.Influence of nano-WC-12Co powder addition in WC-10Co-4Cr AC-HVAF sprayed coatings on wear and erosion behaviour[J].Wear, 2010, 5-6(269):362-367[22] Verdon C, Karimi A, Martin J L.A study of high velocity oxy-fuel thermally sprayed tungsten carbide based coatings. Part 1: Microstructures[J].Materials Science and Engineering: A, 1988, 1-2(246):11-24[23] Hong S, Wu Y P, Gao W W, et al.Microstructural characterisation and microhardness distribution of HVOF sprayed WC–10Co–4Cr coating[J].Surface Engineering, 2014, 1(30):53-58[24] He J, Schoenung J M.A review on nanostructured WC–Co coatings[J].Surface and Coatings Technology, 2002, 1(157):72-79
2017, Vol. 27 
