硅含量对一种耐蚀合金组织与耐蚀性能的影响  

Effect of Silicon Content on Microstructure and Corrosion Resistance of a Corrosion Resistant Alloy

作　　者：王道红 谢君 张鹏[1,2] 侯桂臣 杨金侠 荀淑玲[2,3] 周亦胄 WANG Dao-hong;XIE Jun;ZHANG Peng;HOU Gui-chen;YANG Jin-xia;XUN Shuling;ZHOU Yi-zhou(JiangSu Feiyue Machine&Pump Gruop Co.,Ltd.,Jingjiang 214536,Jiangsu,China;JiangSu Jinyan New Material Technology Co.,Ltd.,Jingjiang 214536,Jiangsu,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,Liaoning,China)

机构地区：[1]江苏飞跃机泵集团有限公司,江苏靖江214536 [2]江苏金研新材料科技有限公司,江苏靖江214536 [3]中国科学院金属研究所,辽宁沈阳110016

出　　处：《铸造》2021年第3期351-354,355,共5页Foundry

基　　金：国家自然科学基金(51701212);中国科学院科技服务网络计划区域重点项目(KFJ-STSQYZX-079);辽宁省自然基金(2019-MS-336);2018年度泰州市高层次创新创业人才引进计划项目(2018-21);2020年度中国科学院青年创新促进会项目(2020198)。

摘　　要：设计并熔炼了不同硅含量的三种耐磨耐蚀合金30Ni-35Cr-6.5Mo-1Nb-0.25N-xSi(x=1、2、3)-Fe,分别命名为1Si、2Si、3Si合金,利用SEM、XRD、硬度测试以及电化学测试研究了三种合金的组织和性能。结果表明,三种合金均为双相结构,两相分别为γ相和σ-Cr_(13)Ni_(5)Si_(2)相,且随着硅含量的增加,σ-Cr_(13)Ni_(5)Si_(2)相所占的比例逐渐增加,合金的洛氏硬度也逐渐增大。动电位极化曲线以及电化学阻抗谱结果表明,3Si合金在10%H_(2)SO_(4)溶液中的耐蚀效果最优,而1Si合金的耐蚀性最差。合金硬度和耐蚀能力的提高主要得益于合金中σ相比例的增大。Three Si-containing wear-resistant and corrosion-resistant alloys 30Ni-35Cr-6.5Mo-1Nb-0.25N-xSi(x=1,2,3)-Fe,named 1Si,2Si,3Si,were designed and melted.SEM,XRD,hardness test and electrochemical test were conducted to study the microstructure and properties of the three alloys.The results show that the three alloys have a dual-phase structure ofγ-phase andσ-Cr_(13)Ni_(5)Si_(2),and the proportion ofσ-Cr_(13)Ni_(5)Si_(2) phase gradually increases with increasing silicon content;the Rockwell hardness HRC of the alloys also gradually increases.Potential polarization curves and electrochemical impedance spectroscopy results show that the 3Si alloy has the best corrosion resistance in 10%H_(2)SO_(4) solution,while the 1Si alloy has the worst corrosion resistance.The increase in hardness and corrosion resistance of alloys is mainly due to the increase inσphase ratio.

关 键 词：硅元素 耐磨耐蚀合金 硬度 耐蚀性 

分 类 号：TG142.71[一般工业技术—材料科学与工程]