【作者】 姜葱葱； 肖桂勇； 张娴； 刘冰； 王铃铃； 朱瑞富； 吕宇鹏；

【Author】 JIANG Congcong;XIAO Guiyong;ZHANG Xian;LIU Bing;WANG Lingling;ZHU Ruifu;LU Yupeng;Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials,Ministry of Education,Shandong University;School of Materials Science and Engineering,Shandong University;

【机构】 山东大学材料液固结构演变与加工教育部重点实验室； 山东大学材料科学与工程学院；

【摘要】 本文通过在化学转化溶液中加入纳米Al₂O₃颗粒、SiO₂颗粒及SiO₂溶胶,利用化学转化的方法在35CrMnSi钢表面形成一层化学转化膜,研究纳米硬质相对转化膜微观结构的影响。结果表明,纳米硬质相的加入对化学转化膜的微观结构有明显的影响,纳米Al₂O₃的加入使磷酸锌由片状晶体变成球形或椭圆形的晶粒,晶粒尺寸减小,转化膜的结构更加致密;纳米SiO₂显著影响了磷酸锌晶体的生长取向,使其由垂直或倾斜于基体表面的片状晶体变成了平行于基体生长的扇形晶体。另外,通过在转化溶液中加入SiO₂溶胶引入SiO₂硬质相的方法克服了传统纳米颗粒在转化液中易团聚、难分散的问题。更多还原

【Abstract】 In this study,the chemical conversion coating was fabricated on 35 CrMnSi steel by the method of phosphate chemical conversion treatment in bath containing the Al₂O₃ particles,SiO₂ particles and sol,the influence of these nanosized hard phases on the microstructure of coating was investigated.Results show that nano Al₂O₃ changed the morphology of hopeite crystals from plates into spherical or oval grains.The grain size was reduced and the coating became denser.Nano SiO₂ significantly influenced the growth orientation of hopeite,making them from plate crystals vertical or inclined to substrate into sector crystals parallel to the substrate.In addition,the introduction of SiO₂ sol in bath could overcome the aggregation of traditional hard phases in bath.更多还原