基于接地材料功能需求的耐蚀铸铁表面改性研究  

Surface Modification of Corrosion-resistant Cast Iron Based on Functional Requirements of Grounding Materials

作　　者：陆添爱 蒋文昊 吴伟 张俊喜 LU Tianai;JIANG Wenhao;WU Wei;ZHANG Junxi(Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power,Shanghai University of Electric Power,Shanghai 200090,China)

机构地区：[1]上海电力大学上海市电力材料防护与新材料重点实验室,上海200090

出　　处：《中国腐蚀与防护学报》2024年第6期1443-1453,共11页Journal of Chinese Society For Corrosion and Protection

摘　　要：电力系统对接地材料的耐蚀性、导电性和成本要求越来越高,因此研发一种新型接地材料至关重要。本研究采用环氧树脂为碳源,控制不同的渗碳温度和保温时间对铸铁表面进行渗碳。采用XRD、Raman、SEM、金相分析、电化学腐蚀实验等方法,研究不同渗碳参数对渗碳层和铸铁基体的组织特征、成分和耐蚀性的影响。研究表明,渗碳铸铁表面形成明显渗碳层,主要成分为Fe_(3)C,耐蚀性显著提高,最优渗碳参数为以5℃/min从室温升至750℃后炉冷。合金铸铁表面采用渗碳工艺可显著提高其耐蚀性和导电性,能够满足接地材料功能需求。The requirements of power system for the corrosion resistance,conductivity and cost of grounding materials are increasing,so it is crucial to develop a new type of grounding materials.Herein,the cast iron was surface modified by carburization with epoxy resin as the carbon source,while controlling heating rate,holding temperature and time.The effect of heat treatment parameters on the microstructure,composition and corrosion resistance of the cast iron before and after carburization were comparatively charachterized by means of XRD,SEM,metallography,Raman spestroscopy,and electrochemical corrosion test.The results showed that there was an obvious carburization coating formed on the cast iron surface,which was mainly Fe_(3)C,thereby the corrosion resistance of the carbuurized cast iron was significantly improved.The best carburizing parameter is to heat up from room temperature to 750℃at a rate of 5℃/min,followed by furnace cooling.The carburization treatment to certain extent process can significantly enhance the corrosion resistance and conductivity of the cast iron,which met the functional requirements of grounding materials.

关 键 词：接地网 铸铁 渗碳 耐蚀性 电化学测量 

分 类 号：TG172[金属学及工艺—金属表面处理]