正交优化带油特种钢材表面高温耐磨涂料  

High-temperature Wear-resistant Coatings on Surface of Special Steel by Orthogonal Optimization Experiment

作　　者：张爱黎[1] 徐景雨 夏春雷 袁志华[1] ZHANG Ai-li;XU Jing-yu;XIA Chun-lei;YUAN Zhi-hua(Shenyang Ligong University,Shenyang 110159,China)

机构地区：[1]沈阳理工大学,沈阳110159

出　　处：《表面技术》2020年第10期253-259,共7页Surface Technology

基　　金：工业联合基金(BK-2017-02Y)。

摘　　要：目的改善特种钢材在高温、中低速等恶劣工况服役条件下的摩擦磨损性能。方法采用涂料制备技术对带有二甲基硅油处理的特种钢材进行表面处理。以环氧E-51树脂为基料,可膨胀石墨、CaF2等高温耐磨材料为颜填料,制备了一种适用于特种钢材表面带油涂装的涂料,并以高温磨损、热失重率、腐蚀电流密度等共同作为评价标准,其中高温磨损作为主要评价标准。在单因素实验的基础上进行正交优化试验,利用熵权法将9组正交优化试验进行分析。结果优化试验结果表明,当颜基比为1.2∶1、石墨用量为35%、CaF2用量为22%、玻璃鳞片用量为18%时,漆膜的高温磨损率仅为0.97%,200℃热失重率仅为5.41%,400℃热失重率为37.84%,腐蚀电流密度仅为1.337×10^-7 A/cm^2,漆膜的综合性能最好,其他性能也同样满足国家标准,其中漆膜的耐碱性能远大于国家标准。结论通过综合加权法计算的正交优化方案的性能比正交9组试验有较为明显的提高,其中高温耐磨率由2.5%降低至0.97%,腐蚀电流密度由2.61×10^-7 A/cm^2降低至1.337×10^-7 A/cm^2,而耐高温性能也由原本的最高350℃提高到400℃。The work aims to improve the friction and wear performance of special steel materials under severe service conditions like high temperature,medium and low speed,etc.The surface of special steel materials with dimethicone was treated by coating preparation technology.The epoxy resin E-51 was used as the base material,and high-temperature wearresistant materials such as expandable graphite and CaF2 were used as pigment fillers to prepare a coating suitable for oil coating on the surface of special steel.High-temperature wear,thermal weight loss rate,corrosion current density,etc.were used as the evaluation criteria,and high-temperature wear was used as the main evaluation criterion.The orthogonal optimization experiment was carried out on the basis of single factor experiment,and 9 groups of orthogonal optimization experiments were analyzed by entropy weight method.The optimization experiment results showed that when the pigment base ratio was 1.2:1,the amount of graphite was 35%,the amount of CaF2 was 22%,and the amount of glass flakes was 18%,the high-temperature wear rate of the film was 0.97%,the weight loss rate of 200℃ and 400℃ was 5.41% and 37.84% respectively,and the corrosion current density was 1.337×10-7 A/cm2,indicating the best comprehensive performance.The other properties also met the national standards,and the alkali resistance of the film was far greater than the value stipulated by the national standard.The results of the orthogonal optimization scheme calculated by the comprehensive weighting method have obvious performance improvement,in which the high-temperature wear resistance rate is reduced from 2.5% to 0.97%,the corrosion current density is reduced from 2.61×10-7 A/cm2 to 1.337×10-7 A/cm2,and the high temperature resistance is also increased from the original 350℃ to 400℃.

关 键 词：正交试验 带油涂装 高温耐磨 特种钢材 熵权法 

分 类 号：TQ630[化学工程—精细化工]