| 高强度不锈钢激光熔覆层抗腐蚀性及其腐蚀机制研究 |
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| 引用本文： | 程宗辉,段本方,张志强,陈云鹏.高强度不锈钢激光熔覆层抗腐蚀性及其腐蚀机制研究[J].失效分析与预防,2021,16(6):385-391. |
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| 作者姓名： | 程宗辉 段本方 张志强 陈云鹏 |
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| 作者单位： | 国营芜湖机械厂，安徽 芜湖 241007 |
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| 摘 要： | 通过激光熔覆技术在基体1Crl5Ni4Mo3N表面制备高强度不锈钢熔覆层，并利用扫描电镜、析氢试验、电化学分析仪对基体与熔覆层的组织结构、析氢速率、电化学阻抗与腐蚀形貌进行测试表征。结果表明:所制备的熔覆层抗腐蚀性较基体差。分别对基体与熔覆层的腐蚀机制进行探究，发现基体与熔覆层腐蚀过程主要分为3个阶段，腐蚀形式为晶间腐蚀。通过此项实验，深入了解了对激光熔覆制备的高强度不锈钢熔覆层的腐蚀特性及腐蚀机制，为后期进行零部件修复提供理论支撑。
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| 关 键 词： | 高强不锈钢 激光熔覆 电化学阻抗 腐蚀性能 晶间腐蚀 |
| 收稿时间： | 2021-07-18 |
Study on Corrosion Resistance and Corrosion Mechanism of Laser Cladding Layer on High Strength Stainless Steel |
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| CHENG Zong-hui,DUAN Ben-fang,ZHANG Zhi-qiang,CHEN Yun-peng.Study on Corrosion Resistance and Corrosion Mechanism of Laser Cladding Layer on High Strength Stainless Steel[J].Failure Analysis and Prevention,2021,16(6):385-391. |
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| Authors: | CHENG Zong-hui DUAN Ben-fang ZHANG Zhi-qiang CHEN Yun-peng |
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| Abstract: | High strength stainless steel cladding layer was prepared on Crl5Ni4Mo3N substrate by laser cladding technology. Then the microstructure, hydrogen absorption rate, electrochemical impedance and corrosion morphology of the substrate and cladding layer were analyzed and characterized by scanning electron microscope, hydrogen absorption test and electrochemical analyzer. The results show that the corrosion resistance of the cladding layer is worse than that of the substrate. The corrosion mechanism of the substrate and cladding layer was explored. It is found that the corrosion process of the substrate and cladding layer is mainly divided into three stages, and the corrosion mode is intergranular corrosion. Through the experiments, the corrosion characteristics and corrosion mechanism of high strength stainless steel cladding layer prepared by laser cladding are better understood, providing theoretical support for the later repair of parts. |
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