无机材料学报

• 研究论文 • 上一篇    

不锈钢表面Al2O3膜的微弧氧化制备

杨钟时1; 贾建峰1; 田军2; 贺德衍1   

  1. 1. 兰州大学物理系, 兰州 730000; 2. 中国科学院兰州化学物理研究所固体润滑国家重点实验室, 兰州 730000
  • 收稿日期:2003-10-08 修回日期:2003-11-21 出版日期:2004-11-20 网络出版日期:2004-11-20

Preparation of Micro-arc Discharge Oxidized Coating on Hot-dip Aluminized Stainless Steel Sheet

YANG Zhong-Shi1; JIA Jian-Feng1; TIAN Jun2; HE De-Yan1   

  1. 1.Department of Physics; Lanzhou University; Lanzhou 730000; China; 2.State Key Laboratory of Solid Lubrication; Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences; Lanzhou 730000; China
  • Received:2003-10-08 Revised:2003-11-21 Published:2004-11-20 Online:2004-11-20

摘要: 报道了在奥氏体不锈钢表面制备氧化物陶瓷膜的新方法.首先用热浸镀工艺在不锈钢表面镀铝,然后利用铝的微弧氧化形成了Al2O3陶瓷膜.对所获得的样品进行了断面形貌观察、成分和相组成分析发现,在金属间化合物上形成的陶瓷膜主要由α-Al2O3和γ-Al2O3构成,γ-Al2O3的含量高于α-Al2O3.对其硬度测试发现,从基底到表面硬度呈梯度分布,氧化物陶瓷表面的硬度约为800HV.

关键词: 奥氏体不锈钢, 热浸镀, 微弧氧化, Al2O3陶瓷膜

Abstract: A new method of surface treatment for austenitic stainless steel sheets was developed to improve their mechanical performance. An aluminium layer
was firstly formed on the surface of stainless steel by immersing the sheet into a 760℃ molten aluminium bath for 8 min. The aluminized stainless
steel sheet was then treated by micro-arc discharge oxidation. The structure of the resultant compound coating was analyzed by using X-ray diffraction,
scanning electron microscopy with energy dispersive spectrometer and Vickers micro-hardness tester. The results show that a ceramic coating composed mainly
of α-Al2O3 and γ-Al2O3 is formed on a medium intermetallic compound layer and the content of γ-Al2O3 is higher than that of α-Al2O3. The micro-hardness of the compound coating
shows a gradation from the coating surface (800HV) to the substrate (230HV) through the medium intermetallic compound layer (250~600HV).

Key words: austenitic stainless steel, hot-dip aluminium, micro-arc discharge oxidation, coating

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