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李勇

作品数:2 被引量:7H指数:2
供职机构:西北工业大学材料学院凝固技术国家重点实验室更多>>
发文基金:国家重点基础研究发展计划更多>>
相关领域:金属学及工艺更多>>

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Electrochemical corrosion properties of Zr- and Ti-based bulk metallic glasses被引量:2
2011年
The corrosion behaviors of Ti-based and Zr-based amorphous alloys and their corresponding crystallized alloys were studied by electrochemical methods. It is found that the corrosion potentials of Zr-based amorphous alloy and its corresponding crystalline counterpart are both lower than those of the Ti-based amorphous alloy in the 1 mol/L H2SO4 solution. In the 3.5% NaCl solution,Zr-based crystallized alloy exhibits the lowest corrosion potential among the experimental samples. No passivation is observed in the corrosion process for the Zr-based crystalline alloy. However, Zr- and Ti-based amorphous alloys both exhibit passivation characteristics. EIS measurements indicate the amorphous alloys exhibit better corrosion resistance than the crystallized one in the NaCl solution. Surface analysis shows that both amorphous alloys in the NaCl solution are eroded by pitting corrosion. In the H2SO4 solution, all the alloys display similar behaviors and their surfaces can mostly keep intact except for some cracks on the corroded surface at local region.
寇宏超李勇张铁邦李健李金山
关键词:PASSIVATION
热处理对奥氏体不锈钢00Cr18Ni10N组织和性能的影响被引量:5
2011年
通过对新型奥氏体不锈钢00Cr18Ni10N的热处理工艺试验,研究了不同固溶温度、冷却方式和保温时间对其组织性能的影响。结果表明,随着固溶温度的升高,00Cr18Ni10N钢晶粒变大,力学性能降低,塑性提高。随着保温时间的延长,拉伸强度、屈服强度和硬度都有所降低,断后伸长率略有提高,冲击韧性和断面收缩率变化并不显著。虽然冷却方式对其力学性能和晶粒大小的影响并不是很明显,但在1050℃淬火,采用水冷可以到达更好的综合性能。因此,00Cr18Ni10N钢采用1050℃固溶、保温1h后水冷的热处理工艺具有良好的组织和强韧性配合。
李勇寇宏超柳木桐张铁邦钟平李金山
关键词:不锈钢
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