Body-in-white material systems: A life-cycle cost comparison

To be competitive in the global automobile industry, it is no longer enough to understand manufacturing cost alone. The growing emphasis on environmental impact has forced life-cycle cost issues to the forefront. This article defines the life cycle of automotive structures and exterior panels—the body-in-white—to include manufacturing, operation, and post-use. These body-in-white life-cycle costs are assessed for a midsize, four-door sedan using an implementation of a technique called technical cost modeling. This article describes the life-cycle cost-assessment methodology and applies it for alternative body-in-white structure and exterior panel materials. These include steel stampings; aluminum stampings, extrusions, and castings; and resin/glass composite and thermoplastic moldings. The life-cycle costs are presented and analyzed for varying manufacturing scenarios. Although life-cycle costs currently do not drive the decision-making process in the automotive industries, legislative and consumer pressures could one day give them added weight.     

Contemporary car body steels for automotive industry and technological guidelines of their pressure welding

The steels employed to-date by auto-makers for body-in-white manufacturing are discussed in the paper along with multi-structure materials of superb features (transformation-induced plasticity/twinning-induced plasticity effect steels). Technical suggestions are formulated for their welding by resistance spot method.     

The Main Issues of Continuous Casting

Based on excerpts from a paper presented at the Autumn General Meeting of The Iron and Steel Institute, London, and published in the book Continuous Casting of Steel. (A review of this book appears on p. 996.)     

INTERMETALLICS AS SUBSTITUTES FOR SUPERALLOYS

1. IntroductionThe long-range ordered structure m akesinterm etallicspossessing good strength and stiffnessreten-tionsathigh tem peratures.A m ong those,Ti-and N i-alum inidesare m ainly developed assubstitutesforcurrentsuperalloys,additionally due to the…     

重钢高线轧机导卫装置设计与应用

介绍了重庆钢铁股份有限公司高速线材轧机各轧制机组使用的滑动导卫和滚动导卫装置概况 ,重点介绍了导卫装置的结构设计原则和工艺参数的选择和确定方法。实践证明 ,按该方法进行设计计算 ,导卫装置应用效果较理想     

日钢ESP线步进梁式运输机的设计及应用

步进梁式运输机为热轧带钢生产线成品收集区的重要组成设备,其工作效率和稳定性直接影响着整条生产线的生产节奏和产量。依托日照钢铁有限公司ESP无头轧制带钢生产线工程,阐述了该生产线所使用的步进梁式运输机的设计校核、加工制造、装配检验、安装调试及使用维护等情况。     

丙烯球罐用调质板07MnNiMoDR的研发

南阳汉冶特钢有限公司通过合理的化学成分设计,以及冶炼、浇注、轧制和热处理工艺试验研究,成功研发了高强度、高韧性和具有优良焊接性能的60mm厚07MnNiMoDR调质板,介绍了其生产工艺和组织性能检验结果,该钢板性能均符合GB 19189-2011标准要求。     

TiAl金属间化合物工程实用化研究与进展

回顾了钢铁研究总院在提高TiAl金属间化合物合金可靠性和部件制备技术两方面的研究结果,介绍了己开展的应用研究及减重效果研究,并对TiAl合金今后的发展做了简要评述。     

关于南京钢铁厂高炉长寿途径的浅见

针对南京钢铁厂高炉寿命较短的现状及国内外长寿高炉的经验，提出南钢高炉在改善原燃料条件下，提高高炉操作水平，改进炉体各部的设计，提高施工质量，加强日常维修，以达到高炉长寿的建议。     

ISPAT KARMET钢铁公司热轧技术改造

介绍了由中国冶金设备总公司、重庆钢铁设计研究院、武钢自动化有限责任公司组成的中方集团，承担了哈萨斯坦共和国IspatKarmet钢铁公司1700mm热轧机的改造工作。改造主要内容为精轧机上增加工作 辊液压弯辊和平衡装置及工艺辊液压夹紧装置，并配备完整的板形控制自动系统。     

Corrosion-resistant steel fiber produced by the melt-extraction method and its use in refractories

Conclusion Corrosion-resistant steel fiber produced by the melt-extraction method has distinct reinforcing properties, a high capacity to bond with a refractory, low net-cost, and economic production. The introduction of corrosion-resistant steel fibers in refractory articles and materials for concrete spraying improves their thermal stability and mechanical strength. The service life of refractory articles is increased as a result of an increase in resistance to failure and impact loads. Use of corrosion-resistant steel fibers contributes to significant material energy savings, and improves the productivity of furnaces and apparatus.Central Research Institute of Steel and Cast Iron, China. Translated from Metallovedenie i Temicheskaya Obrabotka Metallov, No. 9, pp. 24–26, September, 1992     

Journey to the Isles

A summary of the 1962 General Meeting of The Iron and Steel Institute (of London) with particular emphasis on sessions on productivity. Also described are plant visits in Sheffield and in Scotland.     

卷边机的创新设计

卷边机作为板带生产车间剪切线的重要设备,其工作的稳定性、可靠性直接影响整条机组的辅助作业时间,进而影响整条机组的工作效率。本文在分析国内外卷边机存在问题的基础上,对其结构做了改进设计,增加了锥形回转圆盘,出口侧增加了护板,压辊采用液压控制。改进后的卷边机结构更加合理,工作的可靠性大幅提高,并已成功应用于武钢、鞍钢、梅钢等钢厂。     

微张力减径机自动控制系统的开发及应用

介绍了安阳钢铁股份有限公司Φ130mm机组微张力减径机的传动原理、生产工艺及轧制过程、自动控制系统的构成及其原理。同时对系统软件的设计思想、程序组成、硬件结构进行了阐述,并简述了系统的功能特点。根据运行中出现的问题,对系统硬件进行了改进,对软件进行了优化,使整个系统趋于完善。1年来的生产运行证明,该系统稳定可靠。     

热轧带钢立辊调宽短行程控制模拟研究与应用

针对莱钢1500热连轧机组粗轧段立辊侧压调宽轧制的工艺特点,利用ANSYS/LS-DYNA建立了立辊-水平辊轧制的三维弹塑性有限元模型,研究了不同工况下的带钢轧后头尾端变形(失宽)规律,并据此建立了控制头尾端形状的短行程控制模型。通过比较可以看出,模型能够有效地减小头尾端失宽。这一成果已经应用于莱钢1500热连轧机宽度自动控制(AWC)系统中,并取得良好效果。     

莱钢120t转炉“一键式”炼钢技术改造

莱芜钢铁集团银山型钢有限公司炼钢厂利用转炉副枪的功能,对现有氧枪编码器、散装料下料系统、钢包底吹、转炉底吹进行改造,通过开发铁水与废钢数据自动采集和相应自动控制程序,实现了只要点击开始炼钢按钮,即可实现转炉枪位、氧气流量、散装料加料完全由副枪二级控制直至摇炉放钢的"一键式"智能炼钢。     

南钢国产化大盘卷生产线介绍

针对南钢大盘卷生产线设备全国产的需要,对卷取机、移卷机、步进梁式风冷运输线、卸卷挂卷装置等国外先进设备进行了消化移植,并有所创新,实现了大盘卷生产线的全国产化。     

Φ508mm×9.5mm L450MB钢级ERW管线管的试制

焊缝冲击功低且不稳定是ERW管线管生产的一大技术难点。针对高钢级L450MB焊管存在焊缝冲击功不稳定的情况,宝山钢铁股份有限公司宝钢分公司钢管厂采取降低焊接速度、调整热处理工艺的技术方案,试制出焊缝冲击韧性符合标准要求的L450MB钢级ERW管线管。     

热轧管生产管理信息系统的开发与应用

简要介绍了原安阳钢铁集团公司第四轧钢厂热轧管生产管理信息系统的开发应用及管理情况,并对其设计过程及运行效果作了简单阐述,也为其他同类企业的信息化管理提供一定的参考。     

邯钢三炼钢1#板坯连铸机的设计及生产实践

邯钢三炼钢1#板坯连铸机由中国重型机械研究院有限公司负责设计,连铸机采用了一系列国内外领先、成熟可靠的技术,具有较高的装备水平。经过较长时间的生产实践,生产效果较为理想。生产的铸坯质量优良,满足了高强船板等钢材出口的要求。