Features of a Technology for Extruding High-Alloy Steels and Alloys Without a Remnant

This article reports on the development and use of a technology for extruding high alloy steels and alloy without a remnant. The advantages of the technology are discussed along with the areas in which it could be used most efficiently.     

Use of a Reducing Melt to Treat the Surface of High-Alloy Steels and Alloys

The technological advantages of reducing melts are readily apparent. Such melts can dissolve certain acidic oxides (Si, Mo, W, Ti), and they reduce not only the oxides dissolved in the melt (ferrates, ferrites), but also those on the surface of the steel. A reaction involving sodium hydride completely reduces oxides of iron, nickel, cobalt, and copper and partially reduces oxides of chromium, manganese, vanadium, and titanium. Pickling schemes that have been developed reduce acid consumption and metal loss during pickling and prevent over-pickling of the surface. The technology as a whole is particularly suited for metallurgical plants that produce a wide range of steels. __________ Translated from Metallurg, No. 5, pp. 63–64, May, 2005.     

Electrode Characteristics of MmNi_5－type Alloys for Nickel－metal HydrideBatteries

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冷轧紊流酸洗工艺的分析与优化

结合紊流酸洗技术在鞍钢冷轧厂的应用情况,对酸洗工艺段的工艺流程进行了介绍,分析了带钢酸洗缺陷,提出了具体改进方案及控制策略。     

钛及钛合金的酸洗技术

在简述钛及钛合金特性的基础上,介绍了去除其表面氧化皮的酸洗技术,分析了盐酸、硫酸、硝酸和氢氟酸对钛及钛合金酸洗效果和吸氢量的影响. 钛;钛合金;酸洗;吸氢     

多元低钴稀土基贮氢合金及其电极特性

本文根据多元合金化原则设计了一系列电极用低钴 AB5型贮氢合金。并对其组织、不同温度和不同倍率的电化学性能、P- C- T特性进行了研究。结果表明 ,用多元合金化降低 Co含量后 ,合金的放电容量虽有不同程度的降低 ,但可明显改善其充放电循环稳定性 ,且各种合金在 2 0℃时 1 C和 0 .2 C的放电比率、0 .2 C充放电时 40℃和2 0℃的放电比率均基本保持不变。低 Co合金具有更低的平台压。     

推拉式酸洗机组的工艺分析

对推拉式酸洗机组的工艺流程和设备配置中一些关键设备(如开卷机、切边圆盘剪、酸槽、冲洗槽)的结构特点、参数选择进行分析,并根据实际经验对存在的缺陷进行改进,解决了一些关键的工艺问题.     

Wear Resistant Steels and Casting Alloys containing Niobium Carbide

Niobium, like titanium and vanadium, forms superhard MC carbides that remain relatively pure in technical alloys on account of their low solubility for other metallic alloying elements. However, because they have a greater hardness than the precipitated chromium carbides commonly used in wear‐resistant alloys, they are suitable as alternative hard phases. This contribution deals with new wear‐resistant steels and casting alloys containing niobium carbide. These include a secondary hardening hardfacing alloy, a composite casting alloy for wear applications at elevated temperatures, a white cast iron as well as two variants of a corrosion‐resistant cold‐work tool steel produced by melt metallurgy and by powder metallurgy. A heat‐resistant casting alloy is also discussed. Based on equilibrium calculations the microstructures developing during production of the alloys are analysed, and the results are discussed with respect to important properties such as abrasive wear and corrosion resistance.     

冷轧酸洗系统酸雾净化回用技术

介绍了冷轧酸洗系统酸雾产生过程及危害,针对传统酸雾净化技术提出了新型改进方法,实现了酸雾的物理法净化处理.阐述了酸雾净化回用技术的方法、工作原理及装置构成,工况条件大幅改观,生产与生态和谐发展的实效.     

钛合金在生物医用领域的应用优势

介绍了钛合金在生物医用领域的性能优势及应用现状。生物医用金属材料必备的四个基本性能,机械性能、生物相容性、耐腐蚀和耐磨性和骨结合性。钛合金具有较低的弹性模量、耐腐蚀、生物相容性优异等特点成为医用金属材料的首选。     

CSP工艺开发电工钢的现状及其优势

简述了电工钢的发展历史;重点阐述了意大利AST公司和德国TKS公司采用CSP工艺开发电工钢的现状;并与传统的厚板流程进行了对比分析,表明采用CSP工艺生产的电工钢具有铸态与热轧态晶粒组织细小、温度加热均匀、板形易于控制、成材率高等优势.     

8 mm厚规格连续热板酸洗机组工艺及技术特点

包钢连续热板酸洗机组是国内首条可以生产最大8 mm厚带钢的连续热板酸洗线,该生产线具有国内领先水平。文章介绍了该机组的产品定位、工艺流程及主要装备水平,重点介绍了机组生产厚板的关键技术,通过多方面的优化设计,保证生产线可以连续稳定的生产厚规格产品。     

谈微合金化钢的控轧控冷技术

通过查阅大量参考文献,主要综述了控轧控冷技术的原理、特点及控制要素,并分析了控轧控冷对微合金钢的组织与性能的影响。     

拉弯矫直理论和酸洗拉矫机工艺设定的研究

对拉弯矫直理论进行了系统的研究及总结,并据此分析了酸洗拉矫机工作机理及相应的工艺优化条件。     

钢材性能柔性化与柔性轧制技术

为解决用户个性化需求与企业规模化生产之间的矛盾,提出将组织性能在线优化控制技术应用于柔性轧制,用同一种成分的坯料来生产不同性能的产品,简化炼钢和连铸的操作和管理,利用对钢材性能柔性的控制实现轧制生产的大规模定制.指出当前2种可行的柔性轧制实例:用普碳钢生产屈服强度为200～400 MPa的产品,用碳锰钢生产屈服强度为350～600 MPa的产品.     

Activity and Stability of Rare Earth-Based Hydride Alloys as Catalysts of Hydrogen Absorption-Oxidation Reactions

Rare earth-based AB5-type hydrogen storage alloys as catalysts of hydrogen-diffusion electrodes for hydrogen absorption and oxidation reactions in alkaline fuel cells were investigated. It is demonstrated that the metahydride hydrogen-diffusion electrodes could be charged by hydrogen gas and electrochemically discharged at the same time to retain a stable oxidation potential for a long period. The catalytic activities and stability are almost comparable with a Pt catalyst on the active carbon. Further improvement of performances is expected via reduction of catalyst size into nanometers.