强流脉冲电子束处理50BA钢耐腐蚀性能

发布时间：2018-05-04 03:05

本文选题：强流脉冲电子束 + BA钢　；参考：《表面技术》2017年06期

【摘要】：目的研究强流脉冲电子束(HCPEB)对50BA钢表层组织和表面耐腐蚀性能的影响。方法对50BA钢进行不同脉冲次数的表面处理,用扫描电镜观察组织变化,并在NaCl和去离子水配成的3.5%NaCl腐蚀溶液中(室温)进行动电位极化曲线测试。结果经HCPEB处理后,50BA钢试样表层晶粒细化且产生了细小均匀分布的针状马氏体,随着脉冲次数的增加,表面趋于光滑。试样表面的自腐蚀电位从-0.660 V提高到-0.629 V,腐蚀电流从1.48×10~(-6) A降低到8.36×10~(-7) A。随着脉冲次数的增加,试样表面的腐蚀电流降低,腐蚀电位升高,腐蚀速率降低,腐蚀倾向性减小,其中50次脉冲处理后试样表面的耐蚀性能最好。结论经HCPEB处理后,表层组织发生相转变,表面趋于光滑和获得的均匀细小针状马氏体从理论上解释了50BA钢耐腐蚀性能的提高。为了提高50BA钢的耐腐蚀性,应将脉冲次数控制在30次以上,且越高越好。
[Abstract]:Aim to study the effect of high current pulsed electron beam (HCPEB) on the surface structure and corrosion resistance of 50BA steel. Methods the surface of 50BA steel was treated with different pulse times. The microstructure was observed by scanning electron microscope. The potentiodynamic polarization curves were measured in 3.5%NaCl corrosion solution (room temperature) mixed with NaCl and deionized water. Results after HCPEB treatment, the surface grain of the steel was fine and fine and evenly distributed needle-like martensite. With the increase of pulse number, the surface tended to be smooth. The corrosion potential of the sample surface was increased from -0.660 V to -0.629 V, and the corrosion current decreased from 1.48 脳 10 ~ (-6) A to 8.36 脳 10 ~ (-7) A. With the increase of pulse number, the corrosion current, corrosion potential, corrosion rate and corrosion tendency of the sample surface are decreased, and the corrosion resistance of the sample surface is the best after 50 pulse treatments. Conclusion after HCPEB treatment, the surface microstructure changes, the surface tends to smooth and the uniform fine acicular martensite is obtained, which theoretically explains the improvement of corrosion resistance of 50BA steel. In order to improve the corrosion resistance of 50BA steel, the pulse number should be controlled more than 30 times, and the higher the better.
【作者单位】：重庆理工大学材料科学与工程学院;重庆市模具技术重点实验室;江苏祥和电子科技有限公司;重庆长安工业集团责任有限公司;
【基金】：国家自然科学基金(51101177) 重庆市自然科学基金(cstc201250035,2014yykfB60004) 重庆市巴南区科技项目(2015TJ08) 重庆市模具技术重点实验室开放基金(2015TD19) 江苏省高层次创新创业人才引进计划~~
【分类号】：TG142.1;TG661

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