TC4钛合金微弧氧化膜层成膜机理及特性分析  

Film Forming Mechanism and Characteristic Analysis of TC4 Titanium Alloy Micro-arc Oxide Film

作　　者：张柄楠 魏刚[1] 尤社社 杨艳[1] 王通平[1] 张伟强[1] 王永平 王晨[1] ZHANG Bingnan;WEI Gang;YOU Sheshe;YANG Yan;WANG Tongping;ZHANG Weiqiang;WANG Yongping;WANG Chen(No.12 Research Institute of CSIC,Xingping 713102,China;Department of Inspection and Measurement,Shaanxi Diesel Heavy Industry,Co.,Ltd.,Xingping 713105,China)

机构地区：[1]中国船舶重工集团公司第十二研究所,陕西兴平713102 [2]陕西柴油机重工有限公司检验计量部,陕西兴平713105

出　　处：《热加工工艺》2018年第24期123-125,129,共4页Hot Working Technology

摘　　要：微弧氧化技术可以使铝、镁、钛等阀金属表面形成类火山状致密的陶瓷层,使其具有优良的耐蚀性、绝缘性、耐磨性和热冲击性。通过SEM、电化学工作站、粗糙度仪等分析了钛合金微弧氧化膜层成膜机理及膜层性能。结果表明,采用弱碱性硅酸盐-磷酸盐复合体系在TC4钛合金表面生成陶瓷膜,钛合金的耐蚀性能大幅度提升。膜层粗糙度随着厚度的增加而增大,当膜层厚度大于25μm时,表面粗糙度增长速度急剧增加。随着膜层厚度的增加,表面硬度先增大后减小,当膜层厚度为20～25μm时,表面硬度达到最大值。Micro-arc oxidation technology can make aluminum, magnesium, titanium and other valve metal surface form a volcanic-like dense ceramic coating, it has excellent corrosion resistance, insulation, wear resistance and thermal impact.The film forming mechanism and properties of titanium alloy micro-arc oxide film were analyzed by SEM, electrochemical workstation and roughness meter. The results show that, ceramic film is formed on the surface of TC4 titanium alloy by using weakly alkaline silicate phosphate composite system, and the corrosion resistance of titanium alloy is greatly improved. The roughness of the film increases with the increase of the thickness. When the thickness of the film is more than 25 μm, the growth rate of the surface roughness increases sharply. With the increase of film thickness, the surface hardness first increases and then decreases.When the thickness of the film is 20-25 μm, the surface hardness reaches the maximum value.

关 键 词：微弧氧化 钛合金 粗糙度 耐蚀性 硬度 

分 类 号：TG174.44[金属学及工艺—金属表面处理] TG146.23[金属学及工艺—金属学]