摘要
对3D打印AlSi10Mg合金进行阳极氧化处理,研究了氧化电压对其表面阳极氧化膜的结构特征、耐蚀性和耐磨性的影响。结果表明:与传统铸造高Si铝合金不同,3D打印AlSi10Mg合金晶粒尺寸细小,Si较为均匀地分布于铝合金基体内部,经阳极氧化处理后,膜层表面Si元素分布均匀,未发现明显Si偏析;随着氧化电压的升高,阳极氧化膜层的形核位点增多,生长速度加快,厚度增加,表面粗糙度降低,裂纹和孔洞等缺陷减少,致密性显著提高,同时膜层的硬度、耐蚀性和耐磨性也呈逐渐升高趋势;当氧化电压为16 V时,阳极氧化膜层的厚度为5μm,致密性最好,硬度高,相比AlSi10Mg合金基体,其耐蚀性和耐磨性显著提高。
Anodizing treatment was carried out on 3D printed AlSi10Mg alloy,and the influence of oxidation voltage on structural characteristics,corrosion resistance,and wear resistance of its surface anodic oxide film was studied.The results show that unlike traditional casting high Si aluminum alloys,the grain size of the 3D printed AlSi10Mg alloy is small,and Si is evenly distributed inside the aluminum alloy matrix.After anodizing treatment,the Si element distribution on the surface of the film layer is uniform,and no obvious Si segregation is found.With the increase of oxidation voltage,the nucleation sites of the anodized films increase,the growth rate accelerates,the thickness increases,the surface roughness decreases,the defects such as cracks and holes decrease,the density significantly improves,and the hardness,corrosion resistance and wear resistance of the films also show a gradually increasing trend.When the oxidation voltage is 16 V,the anodized film with a thickness of 5μm has the best density and high hardness.Moreover,compared with the AlSi10Mg alloy substrate,its corrosion resistance and wear resistance are significantly improved.
作者
王红波
罗志威
郭浩哲
刘尊营
于淼
周亮
马大衍
WANG Hong-bo;LUO Zhi-wei;GUO Hao-zhe;LIU Zun-ying;YU Miao;ZHOU Liang;MA Da-yan(School of Materials Science and Engineering,Chang’an University,Xi’an 710061,China;State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《材料热处理学报》
北大核心
2025年第3期200-207,共8页
Transactions of Materials and Heat Treatment
基金
中核集团科技创新计划项目(J202107006)
陕西省重点研发计划项目(2023-YBGY-441)
长安大学中央高校基本科研业务费专项资金资助(300102314903)
强脉冲辐射环境模拟与效应全国重点实验室专项经费资助项目(NKLIPR2203)。
