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| 1 | Enhancing the mechanical and anticorrosion properties of 316L stainless steel via a cathodic plasma electrolytic nitriding treatment with added PEG显示文摘A cathodic plasma electrolytic nitriding(CPEN)treatment with a urea aqueous solution was performed on 316L stainless steel to rapidly improve its surface properties in this work.Test results show that the PEG2000 macromolecules increased the nitriding energy via enhancing the ability to bond the produced gas film to the metal/electrolyte interface.The cross-sectional morphologies indicate that a thick nitrided layer was obtained when the urea concentration was 543 g I^-1,corresponding to a Vickers hardness 450 HV(0.1),which was 3.5 times larger than that of the substrate.The nitrided layer mainly contained expanded austenite(γN),oxides and iron nitrides(e.g.,Fe3O4 and FeN(0.076)).In terms of its performance,coefficient of friction(COF)of the nitride layer decreased to nearly two-thirds that of the untreated layer,and the passivation current densities of the nitrided sample in a 3.5%NaCl solution decreased by an order of magnitude compared to that of the substrate.Therefore,the approach presented herein provides an attractive way to modify the effect of CPEN in a urea aqueous solution. | Tianyi Zhang Junsheng Wu Lei Jin Zhan Zhang Wan Rong Bowei Zhang Yi Wang Yedong He Wei Liu Xiaogang Li | 2019 | Journal of Materials Science & Technology2019，35，11： | 3 |
| 2 | TiNi形状记忆合金表面改性技术研究进展显示文摘综述了Ti Ni合金表面改性方法的研究进展,讨论了表面改性处理对Ti Ni合金耐磨性、耐蚀性和生物相容性的影响。最后,展望了Ti Ni合金表面改性技术的发展方向。 | 金威威 许仁波 王云学 | 2018 | 热加工工艺2018，47，18： | 2 |
| 3 | S-07钢在高压充气阀芯中的替代应用研究显示文摘目的解决高压充气阀S-03钢渗氮阀芯生产过程中周期长、合格率低、渗氮层开裂和贮存过程中锈蚀及方向漏率超标等问题。方法结合S-03钢渗氮阀芯工艺流程,分析其生产及贮存过程中存在的问题,并提出由S-07钢替代S-03钢渗氮工艺,从防锈、硬度和强度3个方面进行两种材料特性理论分析,同时进行耐蚀性试验、功能性试验、力学环境试验和寿命试验考核。结果 S-03钢渗氮阀芯经历湿热试验20 d后,出现轻微锈蚀,盐雾试验96 h后,锈蚀严重,而同条件下的S-07钢阀芯无锈蚀。S-07钢阀芯经过了功能性试验,x,y,z这3个方向的力学环境试验,动作200次的寿命考核试验后,动作灵活,功能测试合格。结论充气阀阀芯完成了S-07钢替代工艺研究,成功解决了影响充气阀功能的阀芯锈蚀问题和渗氮层开裂问题,同时使生产效率提高了约70%,生产成本降低了约50%。 | 黑爱卿 邓全得 高斌 席常亮 | 2020 | 精密成形工程2020，12，3： | 0 |
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