HVOF喷涂Cr3C2-25NiCr涂层和WC-12Co涂层的组织结构及抗磨蚀性能
Microstructure and Anti-Abrasion Properties of HVOF Sprayed Cr3C2-25NiCr Coating and WC-12Co Coating
摘 要
采用HVOF喷涂技术在水轮机用0Cr13Ni5Mo不锈钢表面分别制备Cr3C2-25NiCr涂层和WC-12Co涂层。利用光学显微镜、显微硬度计、冲击韧性试验机、摩擦磨损试验机、扫描电子显微镜分析比较了两种涂层的微观组织结构、显微硬度、孔隙率、冲击韧性、抗磨损性能。结果表明:Cr3C2-25NiCr涂层的孔隙率为0.97%,平均显微硬度为1 113 HV,WC-12Co涂层的孔隙率为0.56%,平均显微硬度为1 241 HV;WC-12Co涂层的冲击韧性和抗磨蚀性能均优于Cr3C2-25NiCr涂层,涂层的失效主要是砂粒、水、气泡三相流复合磨蚀作用的结果。
WC-12Co涂层
冲击韧性
抗磨蚀性能
三相流
Cr3C2-25NiCr coating
WC-12Co coating
impact toughness
erosion corrosion resistance
three phase flow
Abstract
Cr3C2-25NiCr coating and WC-12Co coating were prepared by high velocity oxygen fuel (HVOF) spraying technology on the surface of 0Cr13Ni5Mo stainless steel used for hydraulic turbines. The microstructure, micro-hardness, porosity, impact toughness and erosion corrosion resistance of the two coatings were analyzed in comparison by metallographic microscope, micro hardness tester, impact toughness tester, friction and wear tester, scanning electron microscope. The results show that the porosity of the Cr3C2-25NiCr coating was 0.97% and the average micro-hardness was 1 113 HV, while the porosity of the WC-12Co coating was 0.56% and the average micro-hardness was 1 241 HV. The WC-12Co coating had better impact toughness and erosion corrosion resistance compared with those of the Cr3C2-25NiCr coating. The failure of the coatings was mainly the result of combined erosion and corrosion of sand, water and bubbles.
中图分类号 TG174 DOI 10.11973/fsyfh-202208011
所属栏目 试验研究
基金项目 浙江省科技计划(2019C04019,G C19E090001)
收稿日期 2020/10/16
修改稿日期
网络出版日期
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联系人作者陈小明(fulitop@163.com)
引用该论文: FU Li,CHEN Xiaoming,LIU Wei,WEI Guoying,MAO Pengzhan,ZHAO Jian. Microstructure and Anti-Abrasion Properties of HVOF Sprayed Cr3C2-25NiCr Coating and WC-12Co Coating[J]. Corrosion & Protection, 2022, 43(8): 56
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