超低碳奥氏体不锈钢00Cr18Ni10还原脱磷研究

在 2 5kg真空感应炉上用镁钙合金对超低碳奥氏体不锈钢 0 0Cr18Ni10进行了还原脱磷试验。通过充入工业纯氩使炉内压力为 6 6 .6 6kPa和精炼时的反应温度 14 5 0～ 15 0 0℃ ,加入镁钙合金 5 0kg t和助熔剂CaF2 11kg t,可使精炼后 0 0Cr18Ni10的磷含量进一步降低到 (5 0～ 6 0 )× 10 - 6 ,钢中氧、硫含量分别稳定降到(4～ 6 )× 10 - 6 和 15× 10 - 6 。     

Water management in the Flemish steel industry: the Arcelor Gent case

Steel production is an energy- and water-intensive process: large quantities of water are used for cooling, process and environmental-technical applications. In the mid-1990s, Arcelor Gent, a large integrated carbon steel producing company in Flanders (Belgium), started a number of water-related projects: the existing water infrastructure was adapted: the water from the coke plant was biologically treated; canal water was demineralised using reverse osmosis; waste water from the blast furnaces was neutralised with alkaline water from the steel plant. As a result of these projects, the quantity of discharged waste water was reduced by a factor of 2 (water recycling doubled from a factor of 10 to a factor of 20), and the discharge of pollutants decreased. Also resource consumption decreased: lime used in the steel plant, could be recovered to precipitate Zn in the waste water of the blast furnaces. Arcelor Gent obtained for these projects several Environmental Awards.     

钢包炉(LF)预熔精炼渣的研究

预熔精炼渣具有成分均匀，性能稳定，储存时不吸水等特点，钢包炉中使用预熔精炼渣时成渣均匀且速度快，具有较强的吸附钢中非金属夹杂的能力。综合脱硫率高等冶金效果。有显著净化钢液作用。     

柳钢混铁炉炉衬结构及运行管理的技改实践

针对混铁炉使用过程中出现的各种侵蚀状况，设计采用砖砌十浇注复合炉衬结构，特别对前墙拐角和后墙中段等侵蚀快的关键部位作了有针对性的技术改进；在运行管理上，制定推行全新的工艺操作规程，取得了显著的使用效果。     

仿西班牙横移车断齿事故分析及改进

某炼钢厂仿西班牙产品制造的板坯横移车运行机构采用分别驱动、变频调速、无人操纵自动控制技术。其减速器齿轮多次发生点蚀、塑性变形、断齿等事故或故障 ,严重时曾出现轮齿全部被剃光的现象。经分析 ,其根本原因是承载能力不足。通过重新选型设计 ,加大减速器中心距 ,彻底根除了断齿等事故隐患     

Influence of the surface conditions on permeation in the deuterium–MANET system

The condition of the surfaces is of crucial importance for the deuterium permeation through materials. In this work a study of the surface constants for the adsorption (σk₁) and release (σk₂) of deuterium under different surface conditions on the martensitic steel DIN 1.4914 (MANET) has been carried out. The growth of an oxide surface layer (Cr₂O₃) of about 25–30 nm in a MANET sample, heat treated in an oxidizing environment, compared to the bare MANET that have a ‘natural' oxide of about 5 nm has provoked a reduction of both the permeation rate and the recombination coefficient (about 3 orders of magnitude). In addition, the permeation governing process has changed from diffusion-limited to surface-limited. The measurements of the permeation rate of deuterium were performed by a gas-phase permeation technique over the temperature range 574–746 K and for deuterium driving pressures in the range from 3 to 10⁵ Pa.     

大跨度架空输水钢管的纵向局部加强设计

本文给出了用加强板加大管道截面系数来增加架空输水管道跨越距离的设计方法及其计算过程,并用实例说明了用此种方法加强大跨度管道的有效性和合理性。     

贝氏体钢内水冷穿孔顶头的粘钢及防止措施

从顶头生产工艺控制的角度,分析了贝氏体钢内水冷穿孔顶头产生粘钢的原因、特点和机制,指出掉鼻、缺肉是顶头粘钢的另一种更为严重的失效形式,强化熔炼工艺控制和保证夹杂物总量在A0.5B1C0.5D1级水平,粘钢问题可以得到有效控制。     

加速国内电弧炉工艺技术的发展

提出以紧凑式电炉流程模式对国内电炉钢厂进行改造，以及加强大型电炉冶炼工艺技术研究的建议。     

残余应力对55SiMnVB弹簧钢疲劳性能的影响

研究了５５ＳｉＭｎＶＢ弹簧钢板疲劳断口特征及裂扩展过程。结果表明，喷丸强化在表层产生的残余压应力可明显提高疲劳抗力，增强裂纹闭合效应，降低裂纹扩展速度。