首页|Cr含量对Fe-Cr-Si三元系合金组织和耐蚀性能的影响

Cr含量对Fe-Cr-Si三元系合金组织和耐蚀性能的影响

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为了探究Cr元素含量对Fe-Cr-Si三元系合金组织和耐蚀性能的影响,采用SEM、XRD等仪器对3种不同Cr含量的Fe-Cr-Si系合金的显微组织、硬度及其腐蚀行为展开研究,系统分析了 Cr含量变化对Fe-Cr-Si系合金材料的显微组织、硬度及耐蚀性能的影响.结果表明:3种不同Cr含量的Fe-Cr-Si合金均由树枝晶和枝晶间基体组成.随着Cr含量的增加,枝晶间Fe3Si相增多,Fe-Cr固溶体相生成.相比Fe8Cr10Si合金,Fe16Cr10Si合金的硬度降低16%.10%(质量分数)HCl溶液浸泡腐蚀试验结果表明,Cr含量较低的Fe8Cr10Si合金的腐蚀情况最为严重,出现较深的腐蚀坑,腐蚀坑中的片状硅化物未能有效地防止合金被侵蚀.固溶态Cr含量的升高是促使Fe-Cr-Si合金耐蚀性能提升的主要原因.
Effect of Cr on the Microstructure and Corrosion Resistance of Fe-Cr-Si Ternary Alloys
In order to explore the effect of Cr element content on the microstructure and corrosion resistance of Fe Cr Si ternary alloys,SEM,XRD and other instruments were used to investigate the microstructure,hardness and corrosion behavior of three different Cr content Fe Cr Si alloys.The effects of the different Cr content on the microstructure,hardness and corrosion resistance of Fe-Cr-Si alloys materials were ana-lyzed systematically.Results showed that the three kinds of Fe-Cr-Si alloys with various Cr content were composed of dendrites and interden-dritic substrate.With the increase of Cr content,the Fe3Si phase between dendrites increased,and Fe-Cr solid solution phase was formed.Compared to Fe8Cr10Si alloy,the hardness of Fe16Cr10Si alloy reduced by 16%.The results of the 10%(mass fraction)HCl solution immersion corrosion test indicated that Fe8Cr10Si alloy with low Cr content had the most severe corrosion with deep corrosion pits appearing,and the sheet-like silicides in the corrosion pits failed to effectively prevent the alloy from being corroded.In general,the increase of solid solution Cr content was the main reason for the improvement of corrosion resistance of Fe-Cr-Si alloy.

Fe-Cr-Si alloymetallographicstructuresolid solution Crcorrosion resistance

张学峰、龙海洋、贵永亮、胡桂渊、宋春燕、蒋德华、秦铁玉

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华北理工大学冶金与能源学院,河北唐山 063210

河钢集团唐山钢铁集团有限责任公司技术中心,河北唐山 063600

Fe-Cr-Si系合金 金相组织 固溶Cr 耐蚀性能

河北省杰出青年科学基金河北省高校百名优秀创新人才支持计划河北省人才工程培养资助项目华北理工大学-河北省在读研究生创新能力培养资助项目河北省省属高校基本科研业务服务基础研究项目

E2019209473SLRC2019030A201905010CXZZBS2024136E2019209473

2024

材料保护
武汉材料保护研究所,中国腐蚀与防护学会 中国表面工程协会

材料保护

CSTPCD
影响因子:1.129
ISSN:1001-1560
年,卷(期):2024.57(4)
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