1997年度大中型钢铁企业节能工作情况综述

第九次节能工作会议后，冶金工业掀起了节能降耗的新高潮。各企业都从本单位 实际出发，狠抓节能降耗工作，节能增效成绩显著。大中型钢铁生产企业全年节能３５０万ｔ标煤，超 出１９９７年初冶金工作会议确定的全行业节能３００万ｔ目标。创造效益２８亿元。     

添加高速钢粉对烧结钢组织与性能的影响

研究了添加高速钢粉对烧结钢组织与性能的影响。实验结果表明，含２０％高速钢的烧结钢综合力学性能最好；添加高速钢粉能导致烧结钢密度减小的冲击韧性降低，当高速钢含量增中时，硬度随之增加，烧结钢中残余奥氏体和马氏体的含量与高速钢的含量呈线性关系。烧结钢中的马氏体显微硬度很高，它主要原高速钢粒子和原铁粒子的连接区域形成。     

快速钨铼热电偶的测温误差

本文用热电偶误差计算的通用方法（极限误差表达法）分析了构成快速钨铼热电偶测温误差的因素，从量的角度探讨了各因素对总的误差的影响，对如何认识快速钨铼热电偶的测温精度，提出了可供参考的观点。     

渣对钢液温度的影响

开发了渣表面散热模型，定量分析了渣层内温度变化规律，以及表面散热情况，比较了模型计算结果与大冶钢厂现场实测值，指出保证５０ｍｍ的渣层厚度有利于减少钢液温度损失，开发的模型可作为钢液温度控制的一部分指导现场生产。     

Evaluation of different coating systems by electrochemical methods

Corrosion protection of organic coated steel is determined by free corrosion potential measurements and impedance spectroscopy. The results are classified by means of very basic considerations and evaluation figures are developed. These electrochemical data are correlated with the extent of the corrosion for each coating system. The evaluation figures are used for ranking coating systems and this ranking is correlated with the ranking with reference to the results of standardized and exposure tests.     

炉外精炼过程中炉渣的有效控制

对连铸机浇铸之有前钢水的炉外处理技术，尤其是对炉渣的控制进行了研究，从而使钢的纯净度和连铸可浇性大大提高。     

GCr15控制轧制新工艺的模拟研究

用热扭转试验机，实现了热变形模拟轴承钢控制轧制工艺。研究了形变过程中所发生的静态和动态软化过程，观察了形变后的组织，证实在生产过程中实现的可能性，为在生产中推广使用提供了科学依据。     

Stress concentration and fatigue of profiled reinforcing steels

Stress concentrations arise from profiles of ribbed reinforcing steel bars and in this study the results of calculated stress concentration factors (SCF), by using finite element method, are related to the fatigue test results. It is apparent that the degree of confinement of a ribbed bar embedded in concrete not only affects the magnitude of the ultimate bond stress but also the bond stress-slip relation. Thus the rib geometry or profile pattern is designed for optimum bond characteristics and not for fatigue considerations. However the rib geometry influences the fatigue performance through the SCFs arising from the root radius, width and flank angles of the profiles. It is shown that these latter factors have a significant influence on the fatigue behaviour of reinforcing steel bars.     

S7-200在KYS-1500/50型打捆机中的应用

采用西门子S7-200系列PLC设计电气控制系统,成功实现打捆机系统的自动控制,满足了生产的工艺要求。     

Simultaneous chromizing-aluminizing coating of austenitic stainless steels

Chromium and aluminum were simultaneously co-deposited by diffusion into austenitic stainless steel substrates, by a single-step, pack-cementation process. The mechanism for the formation of diffusion-coated products on 304 and 316 stainless steels and on Incoloy 800 is discussed. The morphologies of the phases formed at the surface, i.e., an external beta layer and an underlying multiphase interdiffusion zone, are presented. The formation of the brittle, , outer layer was minimized by variations in the pack composition and activator. The coated 304 and 316 steels exhibited excellent scaling resistance upon oxidation in air at 1000°C.