循环气压结合超声辅助封孔剂封孔处理对铁基非晶合金涂层摩擦磨损性能的影响  

Effect of Sealing with Sealant Assisted by Cyclic Air Pressure Combined with Ultrasound on Friction and Wear Properties of Fe-based Amorphous Alloy Coating

作　　者：田芳 纪秀林[1,2] 严春妍 赵建华[1] TIAN Fang;JI Xiulin;YAN Chunyan;ZHAO Jianhua(School of Mechanical and Electrical Engineering,Hohai University,Changzhou 213022,China;Department of Mechanical Engineering,College of Engineering,Shantou University,Shantou 515063,China)

机构地区：[1]河海大学机电工程学院,常州213022 [2]汕头大学工学院机械工程系,汕头515063

出　　处：《腐蚀与防护》2022年第11期1-6,53,共7页Corrosion & Protection

基　　金：国家自然科学基金(51875169,51475140)。

摘　　要：采用超声速火焰喷涂技术在316L不锈钢表面制备了铁基非晶合金涂层,并以添加硅烷偶联剂的环氧树脂为封孔剂,采用循环气压和超声辅助封孔剂的方法对该涂层进行封孔处理。用扫描电镜(SEM)、能谱仪(EDS)和X射线衍射仪(XRD)等分析了涂层的显微组织和成分,采用线性往复式摩擦磨损试验机研究了涂层封孔前后的干摩擦磨损性能和腐蚀磨损性能。结果表明:涂层呈层状结构,孔隙率约为7.04%,平均显微硬度为855.8 HV,涂层的干摩擦磨损机理主要为局部脆性断裂导致的脱落;封孔后涂层在大气中的摩擦磨损性能和在3.5%NaCl溶液中腐蚀磨损性能均得到提高;当封孔剂中添加1%(质量分数)硅烷偶联剂时,封孔后涂层具有最佳耐蚀性和耐磨损性能。Fe-based amorphous alloy coating was prepared by supersonic flame spraying on surface of 316 L stainless steel. Using epoxy resin with silane coupling agent as sealant, the coating was sealed with sealant assisted by cyclic air pressure and ultrasound. Scanning electron microscopy(SEM), energy dispersive spectroscopy(EDS) and X-ray diffraction(XRD) were used to analyze the microstructure and composition of the coating. The dry friction and wear properties, corrosion and wear properties of the coating before and after sealing were also studied with a linear reciprocating friction testing machine. The results showed that the coating had a lamellar structure with porosity of about 7.04%, and average micro-hardness of 855.8 HV. The dry friction and wear mechanism of the coating was mainly abscission caused by local brittle fracture. The friction and wear properties of the sealed coating in the atmosphere and the corrosion and wear properties in 3.5% NaCl solution were improved. When 1%(mass fraction) silane coupling agent was added into the sealant, the coating had the best corrosion resistance and wear resistance.

关 键 词：铁基非晶合金涂层 封孔 摩擦磨损 腐蚀磨损 

分 类 号：TG178[金属学及工艺—金属表面处理]