Nb对铁素体不锈钢耐铝液腐蚀性能的影响  

Effect of Nb on the Corrosion Resistance of Ferritic Stainless Steels in Molten Aluminum

作　　者：宋佳敏 袁美怡 杨弋涛[1] SONG Jia-min;YUAN Mei-yi;YANG Yi-tao(School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学材料科学与工程学院,上海200444

出　　处：《铸造》2024年第7期968-974,共7页Foundry

摘　　要：研究了Nb含量对铁素体不锈钢的耐铝液腐蚀性能的影响及相关机理。不同含量的Nb元素对试样基体中的第二相分布有影响,这些第二相具有阻碍铝液腐蚀的作用。铁素体不锈钢在铝液中浸蚀后,会在界面处生成金属间化合物层,基体中Nb元素的含量会影响碳化物生成和聚集位置,从而导致耐铝液腐蚀性能的差异。试验结果表明:添加0.2wt.%的Nb元素,可以获得细小弥散第二相,最终获得优异的耐铝液腐蚀性能。The effect of Nb content on the corrosion resistance of ferritic stainless steel to aluminum liquid corrosion and the related mechanism were investigated.Different contents of Nb elements have an effect on the distribution of the second phase in the specimen matrix,and these second phases have the effect of hindering the corrosion of aluminum liquid.After etching of the ferritic stainless steel in aluminum liquid,an intermetallic compound layer will be generated at the interface,and the Nb element content in the matrix will affect the carbide generation and aggregation position,leading to the difference in corrosion resistance to aluminum liquid.The experimental results show that adding 0.2 wt.%of Nb element can obtain fine and dispersed second phase,and finally obtain excellent corrosion resistance in molten aluminum.

关 键 词：铁素体不锈钢 NB 显微组织 铝液 腐蚀 

分 类 号：TG174[金属学及工艺—金属表面处理]