2024铝合金微等离子体氧化电解液配方优化  

Optimization of the micro-plasma oxidation electrolyte formula for 2024 aluminum alloy

作　　者：苗景国[1,2] 王新颖 张泽磊[1] MIAO Jing-guo WANG Xin-ying ZHANG Ze-lei(Department of Materials Engineering, Sichuan Engineering Technical College, Deyang 618000, China Sichuan Engineering Laboratory of Aviation Materials Testing and Stamp Forging Technology, 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》2017年第10期40-44,共5页Light Alloy Fabrication Technology

基　　金：2015年四川省教育厅一般项目(自然科学)(项目编号:16ZB0493);2016年德阳中科先进制造创新育成专项资金计划项目(项目编号:YC-2016-ZP01)

摘　　要：在Na_2SiO_3-NaOH电解液体系下,对2024铝合金进行微等离子体氧化处理。利用L9(33)正交试验法优化出最佳的电解液配方,研究了在此电解液配方下制备出的陶瓷膜层微观形貌、厚度、显微硬度、表面粗糙度、耐蚀性及其相组成。结果表明,用Na_2SiO_3浓度为10 g/L、NaOH浓度为1.5 g/L、抑弧剂浓度为6 g/L的配方制备出的陶瓷层表面微孔均匀、膜层致密,陶瓷层厚度达44.5μm、显微硬度达1 041 HV、耐蚀性较基体的有较大幅度提高、粗糙度值小于3.5μm、陶瓷层主要由γ-Al_2O_3构成。Plasma oxidation treatment was carried out on 2024 aluminum alloy in the Na2SiO3-NaOH electrolyte system. The electrolyte formula was optimized to the best with the L9 （33） orthogonal test. Then the investigation covers the microstructure, thickness, micro hardness, surface roughness, corrosion resistance and phase composition of the ceramic coating prepared with this electrolyte formula. The results show that when the formula is set as 10 g/L concentration of Na2SiO3, 1.5 g/L concentration of NaOH, and 6 g/L concentration of arc suppression agent, the ceramic layer is microporous, homogeneous and pyknotic, the thickness reaches 44.5μm, the microhardness reaches 1 041 HV, the corrosion resistance is much better than that of the substrate, the roughness is less than 3.5 μm, and the ceramic layer is mainly composed of gamma-Al2O3.

关 键 词：2024铝合金 微弧氧化 正交试验法 电解液配方 陶瓷膜层 

分 类 号：TG174.4[金属学及工艺—金属表面处理]