Investigation of performance of WC-10Co4Cr and Cr3C2-25(NiCr) coating by HVOF spraying
High velocity oxy-fuel flame (HVOF) spraying has been usually used for producing high quality cermet coatings.WC-CoCr and Cr3C2-NiCr based coatings are widely used in industry for applications to required abrasion,sliding and erosion resistance.In this paper,WC-10Co4Cr and Cr3C2-25(NiCr) coatings prepared by HVOF spraying were studied. The microstructure,phase composition,porosity and micro hardness of these coatings were investigated by XRD,SEM and micro hardness tests.Bond strength and sliding wear tests were carried out to measure the mechanical properties of coatings. The results indicate that these coatings were compacted with low porosity (no more than 2%) and well combined with the substrate.Sliding wear tests show that the WC-10Co4Cr and Cr3C2-25(NiCr) coatings have good wear resistance,which attributes to the complex microstructures where the ceramic hard-phase (WC and cr3C2 phase) constituents are embedded in a metallic matrix (CoCr and NiCr).WC-10Co4Cr coating has higher wear resistance in comparison with Cr3C2-25(NiCr) coating.
high velocity ozygen fuel spraying (HVOF) WC-10Co4Cr Cr3C2-25(NiCr) coating performance
SHEN Jie WAN Weiwei REN Xianjing GAO Feng WEI Wei HOU Weiao
Beijing General Research Institute of Mining and Metallurgy,Beijing 100044,China
国际会议
The 10th China-Russia System on Advanced Materials and Technologies(第十届中俄新材料新工艺研讨会)
浙江嘉兴
英文
330-333
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）