AC-HVAF喷涂Ni60/WC复合涂层微观组织及冲刷磨损性能研究

利用先进的AC-HAVF喷涂技术在0Cr13Ni5Mo不锈钢上制备了Ni60/WC复合涂层。研究了其微观组织及耐磨性能。试验结果表明:涂层主要由Fe-Ni固溶体以及Cr0.19Fe0.7Ni0.11、WC、M6C(Ni2W4C或Fe3W3C)、Cr26C3、CrB2等相组成,未发现W2C以及W相;涂层与基体结合很好,涂层的孔隙率约2.5%;WC、M6C(Ni2W4C或Fe3W3C)、Cr26C3、CrB2硬质相弥散分布于涂层中,部分区域硬质相达到了200~800 nm;涂层具有优异的耐冲蚀磨损性能,其耐磨性较基体有很大的提高。涂层应用于水轮机叶片的修复,三个月汛期使用后涂层良好。

The Investigate of Microstructures and Erosion Wear Properties of AC-HVAF Sprayed Ni60/WC Composite Coating

Ni60/WC composite coating is prepared using advanced AC-HVAF spray on 0Cr13Ni5Mo stainless steel.The microstructures,sliding wear and erosion wear resistance are investigated.The results show that the coating consists of Fe-Ni solid solution and Cr_(0.19)Fe_(0.7)Ni_(0.11),WC,M_6C(Ni_2W_4C or Fe_3W_3C),Cr_(26)C_3,CrB_2 etc. phases,W_2C and W phases are not discovered;the coating is well combined with the 0Cr13Ni5Mo stainless steel,the porosity rate is about 2.5%;WC,M_6C(Ni_2W_4C or Fe_3W_3C),Cr_(26)C_3,CrB_2 phases distribute on the coating dispersedly,some phases can reach 200 nm to 800 nm;the coating has good erosion wear resistance.Applying this coating to repair a vane of gas turbine engine,the coating is good after used for three months of flood season.