钛铬对低合金赤泥铁组织和性能的影响  

Effect of Ti and Cr on Microstructure and Mechanical Performance of Low Alloy Red Mud Iron

作　　者：康鹤译 罗超庆 谢君豪 汤宏群 曾建民[1,2] 阙凡超 黄静[1] KANG He-yi;LUO Chao-qing;XIE Jun-hao;TANG Hong-qun;ZENG Jian-min;QUE Fanchao(HUANG Jing1(1.School of Resources,Environment and Materials,Guangxi University,Nanning 530004,Guangxi,China;Guangxi Key Laboratory of Processing for Non-Ferrous Metal and Featured Materials,Guangxi University,Nanning 530004,Guangxi,China;Guangxi Alnan Aluminum Inc.,Nanning 530031,Guangxi,China)

机构地区：[1]广西大学资源环境与材料学院,广西南宁530004 [2]广西大学广西有色金属及特色材料加工重点实验室,广西南宁530004 [3]广西南南铝加工有限公司,广西南宁530031

出　　处：《铸造》2020年第7期685-691,共7页Foundry

基　　金：国家自然基金项目(51965005);广西科技重大专项(桂科AA17202001);广西自然基金面上项目(2018GXNSFAA281258);广西有色金属及特色材料加工重点实验室项目(2019GXYSOF02,2020GXYSOF12);广西大学“大学生创新创业训练计划”资助项目(201910593049);广西大学本科生专业能力发展资助项目。

摘　　要：以广西平果赤泥直接还原经脱氧精炼得到的赤泥铁为对象,研究添加少量Cr、Ti元素对赤泥铁微观组织、硬度和耐腐蚀性能的影响。结果表明:添加Cr、Ti元素不会改变赤泥铁的显微组织,组织依旧由石墨+莱氏体组成,但石墨的形态和分布会改变。Cr、Ti单独添加或复合添加均会降低赤泥铁的耐腐蚀性能,但较低含量的Cr合金元素辅以少量Ti合金元素能使赤泥铁合金的硬度显著提高。Red mud is industrial solid waste from bauxite refining alumina.The red mud iron was obtained by red mud of Guangxi Pingguo through direct reduction roasting and deoxidation refining.In this work,the microstxucture,hardness and the electrochemical corrosion behaviors of red mud iron alloy were studied by adding a small amount of Cr and Ti.The results show that the microstructure of original red mud iron does not change when adding the element of Cr and Ti.The structure is still composed of graphite and ledeburite,but the morphology and distribution of graphite are changed.The addition of Cr and Ti alone or in combination can reduce the corrosion resistance of red mud iron,but the hardness of red mud iron alloy can be significantly improved with low content of Cr and a small amount of Ti.

关 键 词：赤泥铁 铬 钛 硬度 电化学腐蚀 

分 类 号：TG174.3[金属学及工艺—金属表面处理]