铁岗水库大坝安全监测自动化系统应用分析

为全面了解铁岗水库大坝安全监测自动化系统的运行情况，本文对系统的可靠性、稳定性和准确性等指标进行分析计算，总结系统运行过程中存在的问题，并就进一步提高水库的大坝安全监测自动化水平提出建议，得到了有益于提高水库整体水利信息化水平的结论。     

Microstructure and corrosion resistance of Fe-Al intermetallic coating on 45 steel synthesized by double glow plasma surface alloying technology

A binary Fe-Al alloyed layer was synthesized on 45 steel by means of double glow plasma surface alloying technique. The corrosion-resisting layer prepared is composed of a sedimentary layer and a diffusion layer, with a total thickness of about 180 μm. The aluminum content of the alloyed layer shows gradual change from surface to the inside of substrate. The ideal profile is beneficial to the metallurgical bonding of the surface alloying layer with substrate materials. The microstructure of both layers consists of the Fe-Al intermetallic compound, which is FeAl with B2 structure in the sedimentary layer and Fe3Al with incompletely ordered DO3 structure in the diffusion layer. The protective film exhibits high micro-hardness. In comparison with the substrate of 45 steel, the corrosion resistance of the aluminized sample is much higher in 2.0% Na2S and 0.05 mol/L Na2SO4 + 0.5 mol/L NaCl mixed solutions.     

差动电阻式测缝计在砌石重力坝加高中的应用

清凉山水库扩建工程是我国首次采用后帮整体式键槽结合最新专利技术的大坝加高工程,为有效检验技术创新成果,在大坝加高新老结合面采用差动电阻式测缝计进行施工期和蓄水期监测。实测资料表明,新老坝整体结合良好,为砌石重力坝加高工程提供了宝贵经验。     

45钢表面双层辉光等离子渗铝

利用双层辉光等离子表面冶金技术,以Al为欲渗合金元素,在45钢表面形成铁铝金属间化合物改性层,采用SEM、EDS、XRD等分析方法研究了改性层形貌、化学成分及相组成特点,并对其进行了结合力检测.结果表明,改性层由沉积层与扩散层组成,主要构成物相为FeAl、Fe3Al和α-Fe(Al),成分呈梯度分布,与基体结合良好.     

45钢表面双辉制备Fe-Al合金层的研究

利用双层辉光等离子表面冶金技术,以Al为源极,45钢为阴极,在其表面形成铁铝合金层,采用SEM、EDS、XRD等分析方法研究了改性层形貌、成分及相组成特点,并对其进行了显微硬度测试.研究结果表明,改性层成分呈梯度分布,与基体结合良好,沉积层主要含有FeAl相,扩散层则由Fe3Al α-Fe(Al)组成.