Na2B4O7浓度对5A06铝合金微弧氧化膜层特性的影响  

Effect of Na2B4O7 concentration on properties of micro-arc oxidation coating on 5A06 aluminum alloy

作　　者：张伟[1] 苗景国[1,2] 李志宏 ZHANG Wei;MIAO Jing-guo;LI Zhi-hong(Department of Materials Engineering,Sichuan Engineering Technical College,Deyang 618000,China;Engineering Laboratory of Aviation Materials Testing and Stamp Forging Technology in Sichuan Province,Deyang 618000,China)

机构地区：[1]四川工程职业技术学院,材料工程系,四川德阳618000 [2]四川省航空材料检测与模锻工艺技术工程实验室,四川德阳618000

出　　处：《轻合金加工技术》2020年第9期41-45,57,共6页Light Alloy Fabrication Technology

基　　金：2019年四川工程职业技术学院校级科研项目(项目编号:YJ2019KJ-19);2015年四川省教育厅科研项目(项目编号:16ZB0494)。

摘　　要：为了提高5A06铝合金表面耐蚀、耐磨性能,选用Na2B4O7,电解液体系对其进行微弧氧化处理。对其在不同浓度下制备出的膜层厚度及显微硬度进行测试,并借助扫描电镜及莱卡金相显微镜对膜层微观形貌进行分析。结果表明:不同主成膜剂Na2B4O7浓度下制备出的微弧氧化膜层均呈“火山喷射口”状凸起形貌。当Na2B4O7质量浓度为10g/L时,膜层连续均匀,厚度达26.2μm,显微硬度高达905 HV0.1,耐磨损时间长达2.5 min,表面综合性能较基体本身有所提高。In order to improve the corrosion resistance and wear resistance of 5A06 aluminum alloy surface,Na2B4O7 electrolyte system was used to treat 5A06 aluminum alloy by micro-arc oxidation.The thickness and microhardness of coating in different concentrations of sodium tetraborate were tested,and micro-morphology of coatings were observed by using scanning electron microscope(SEM)and Laika metallographic microscope.The results show that the appearance like"volcanic vent"is presented on the surface of MAO coatings prepared at different sodium tetraborate concentrations.When the mass concentration of Na2B4O7 is 10 g/L,the coating is continuous and symmetrical with micro-hardness of 905 HV0 j,thickness of 26.2μm,wear resistance time up to 2.5 min,and the surface comprehensive performance is improved compared with the substrate itself.

关 键 词：5A06铝合金 微弧氧化 Na2B4O7 形貌 性能 

分 类 号：TG175.3[金属学及工艺—金属表面处理]