【作者】 朱强； 任卫新； 陈飞； 潘南芝； 王云龙； 朱林中； 王淼； 雷玉成； 刘志成； 程国豪； 盛阳； 姜兆华；

【Author】 Zhu Qiang;Ren Weixin;Chen Fei;Wang Yunlong;Zhu Linzhong;Wang Miao;Lei Yucheng;Liu Zhicheng;Cheng Guohao;Sheng Yang;Jiang Zhaohua;School of Materials Science and Engineering, Jiangsu University;School of Chemical Engineering and Technology, Harbin Institute of Technology;

【机构】 江苏大学材料科学与工程学院； 哈尔滨工业大学化工学院；

【摘要】 为了提高碳钢耐磨损性能,利用微弧氧化法在Q235碳钢表面制备了耐磨氧化铝陶瓷膜层。研究了不同频率下膜层的结构与性能。研究结果表明:氧化铝膜层α-Al₂O₃和γ-Al₂O₃,其中α-Al₂O₃为主晶相,膜层表面为粗糙多孔结构。随处理频率的增加,膜层中γ-Al₂O₃的含量略有增加,α-Al₂O₃的含量略有减少;膜层表面微孔数目增多,孔径减小。膜层的硬度显著高于基体,约为1800Hv,膜层与基体的结合强度为18±0.5 Mpa。膜层的硬度和结合强度随频率变化不大,膜层的厚度随处理频率提高而逐渐减小。摩擦磨损实验表明带有膜层的试样的摩擦系数和磨损率均比基体显著改善。更多还原

【Abstract】 In order to improve the wear resisrance of carbon steel, Al₂O₃ ceramic coatings were prepared on Q235 carbon steel by micro arc oxidatiuon（MAO） method. The structure and properties of the ceramic coatings were studied with different treating frequency. The results show that the coatings are composed of γ-Al₂O₃ and α-Al₂O₃ and α-Al₂O₃ is the domonate phase. The coating surface is coarse and porous. With increasing the treating frequency, the content of γ-Al₂O₃ increases a little and the content α-Al₂O₃ decreas a little; the number of the pores on the coating surface gradually becomes few and the diameters becomes big. The surface hardness of the coating is much higher than the substrate with the value of 18 Hv and the bonding strength of coating is 18±2 MPa. The surface hardness and the bonding strength of the coating is not strongly affected by the treating frequency. The thickness if the coatings gradually becomes little when increasing the treating frequency. The tests reveals that samples with Al₂O₃ ceramic coatings showed low friction coefficient and abrasion quantity.更多还原