模糊综合评价法在钢铁企业安全投资合理性评价中的应用

为了对钢铁企业安全投资进行模糊综合评价,建立了钢铁企业安全投资的评价体系,确定各因素的权重。得出模糊综合评价矩阵,可对各因素进行评价分析;得出某钢铁企业安全投资现状分数为83.9分,等级为较好,需着重加强安全培训、劳保品、工业卫生等人因素方面的投资;在环境方面的投资较合理。     

Effect of Sweating on Insulation of Footwear

The study aimed to find out the influence of sweating on footwear insulation with a thermal foot model. Simultaneously, the influence of applied weight (35 kg), sock, and steel toe cap were studied. Water to 3 sweat glands was supplied with a pump at the rate of 10 g/hr in total. Four models of boots with steel toe caps were tested. The same models were manufactured also without steel toe. Sweating reduced footwear insulation 19–25% (30–37% in toes). During static conditions, only a minimal amount of sweat evaporated from boots. Weight affected sole insulation: Reduction depended on compressibility of sole material. The influence of steel toe varied with insulation. The method of thermal foot model appears to be a practical tool for footwear evaluation.     

超临界锅炉特种管材氧化皮结构特征及剥落规律

通过对超临界锅炉几种常用的铁素体钢及奥氏体钢高温换热管进行取样分析研究,得到了几种材质在运行中产生的氧化皮的结构特征和剥落规律。     

飞机起落架材料防护技术现状及研究进展

介绍了飞机起落架高强度钢的防护工艺及其防护特点。传统的防护工艺主要是镀铬和镀镉工艺,目前出现了无氰镀镉-钛、高速火焰喷涂(HVOF)涂层、低氢脆刷镀镉等新型防护工艺。通过对各新型防护工艺与传统工艺的工艺性能及耐腐蚀性能进行对比发现,各新型防护工艺都能很好地取代传统的防护工艺应用于飞机起落架的保护。     

Low-carbon transition of iron and steel industry in China: Carbon intensity, economic growth and policy intervention

As the biggest iron and steel producer in the world and one of the highest CO₂ emission sectors, China's iron and steel industry is undergoing a low-carbon transition accompanied by remarkable technological progress and investment adjustment, in response to the macroeconomic climate and policy intervention. Many drivers of the CO₂ emissions of the iron and steel industry have been explored, but the relationships between CO₂ abatement, investment and technological expenditure, and their connections with the economic growth and governmental policies in China, have not been conjointly and empirically examined. We proposed a concise conceptual model and an econometric model to investigate this crucial question. The results of regression, Granger causality test and impulse response analysis indicated that technological expenditure can significantly reduce CO₂ emissions, and that investment expansion showed a negative impact on CO₂ emission reduction. It was also argued with empirical evidence that a good economic situation favored CO₂ abatement in China's iron and steel industry, while achieving CO₂ emission reduction in this industrial sector did not necessarily threaten economic growth. This shed light on the dispute over balancing emission cutting and economic growth. Regarding the policy aspects, the year 2000 was found to be an important turning point for policy evolution and the development of the iron and steel industry in China. The subsequent command and control policies had a significant, positive effect on CO₂ abatement.     

钢和硬铝的加速腐蚀试验研究

目的研究45号钢和12号硬铝的温、湿度加速腐蚀情况。方法在不同的温、湿度环境下开展45号钢和12号硬铝的加速腐蚀试验,并将不同条件下的试验结果进行对比。结果得到了45号钢和12号硬铝的腐蚀速度与温、湿度条件的关系,获得了45号钢和12号硬铝分别在“40℃,RH为85％”和“70℃,RH为85％”2种温、湿度环境下的“腐蚀速度-时间”函数关系。结论45号钢和12号硬铝在温、湿度环境下的加速因子与贮存时间呈逆幂率关系。     

奥氏体不锈钢紧固件电偶腐蚀原因分析与防护

介绍了奥氏体不锈钢紧固件受湿热环境腐蚀的典型案例,在对304不锈钢与LY12铝合金接触界面上的电偶腐蚀进行失效分析的基础上,进一步讨论了奥氏体不锈钢活化-钝化腐蚀的损伤机理,并提出几种针对性的防护措施。试验表明,存在EMF差的金属连接件经过表面处理后,具有理想的抗腐蚀性能。     

废钢铁切割加工烟尘的治理

介绍了氧-乙炔火焰切割加工废钢铁产生的烟尘治理系统的设计和系统设备选型,重点介绍了烟尘捕集罩的设计和除尘器、电磁脉冲阀、风机的选型和PLC自动控制以及系统实际运行效果,为废钢铁加工企业治理污染提供一套简单、经济、实用的除尘系统作参考.     

海水淡化水在既有管网输配的铁释放控制研究

由于具有强腐蚀性,海水淡化水在既有市政管网输配过程中往往会产生严重的"红水"现象,主要是由于管网中铁的释放.为了研究控制既有管网中铁释放的有效措施,对管龄为30～40 a的钢管和灰口铸铁管内壁的腐蚀瘤进行分析,主要组成物质为Fe3O4和FeOOH;选择腐蚀较严重的钢管进行静态浸泡试验,重点分析了自来水和淡化水的掺混比、pH值、碱度、氯离子和硫酸根离子对铁释放的影响,并以铁浓度为控制量,初步给出了海水淡化水在既有管网中安全输配所需满足的水质条件:自来水和淡化水的掺混比≥2∶1,pH值在7.6以上,碱度>200 mg.L-1.     

几种结构钢和不锈钢的耐海洋大气腐蚀性能研究

目的 研究服役于海洋大气环境中的几种典型钢材的耐腐蚀性能.方法 通过酸性盐雾?湿热?酸性大气等试验方法研究钢材在海洋大气环境服役过程中的耐腐蚀性能.结果 在海洋大气环境中,通常含铬量较高的不锈钢耐腐蚀性能较为优异,含铬量较低的不锈钢材料耐腐蚀性能较差.结构钢在海洋大气环境下易腐蚀.钝化处理能明显提高不锈钢的耐腐蚀性能,...