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Slab and Level 2 Automation Design Guidelines for Optimum Metallurgy and Productivity for Plate and Steckel Mills

Journal of Iron and Steel Research International 2011年第S1期18卷 550-556页

作者： Stalheim Douglas dgs metallurgical solutions inc. 15003 NE 10th StreetVancouverWA 98684 USA

Many new steel plate processing facilities have been built in the past 10 years around the world with many more being planned for the *** is especially true in developing countries such as China,India and *** of these facilities are plate mills with either one or two stands or a Steckel mill,typically only one stand designed for the production of structural plate ***,there is a lack of understanding with both the mill builders of the world and the mill owners on the importance of properly matching up the available slab supply (either new as part of a new plate/Steckel mill complex or part of an already existing) with the desired end plate product *** mill builders and owners around the world believe that you can take any slab of any dimension and make any plate dimension you *** this is basically true with today’s Level 2 automation systems,it does not always result in optimum metallurgy/mechanical properties or *** less than optimum condition results in mechanical property failures,shape issues,productivity losses and in general a less than desirable costly processing *** is important to the overall optimization of a steel processing facility that the proper slab dimensions be used to produce the proper final plate dimensions along with achieving the required mechanical *** critical nature of this selection will be dependent on the final plate thickness and overall mechanical property *** mechanical property,shape and overall microstructure are heavily dependent on the ability to properly work the entire cross section of the slab through the rolling *** mechanical property,shape and microstructural issues are a result of improper working of the entire cross section during *** ability for a given mill to properly work the entire cross section is dependent on proper slab selection (total reduction ratio) and a proper rolling schedule either generated manual

关键词： slab dimensions optimization grain size rolling schedule automation Level 2

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metallurgical Optimization of Microalloyed Steels for Oil and Gas Transmission Pipelines

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Journal of Iron and Steel Research International 2011年第S1期18卷 669-674页

作者： Stalheim Douglas dgs metallurgical solutions inc. 15003 NE 10th StreetVancouverWA98684 USA

The production of microalloyed steels for oil and gas transmission pipelines has inc.eased significantly over the past *** more and more countries developing their own capabilities to produce pipeline steels to support their own internal pipeline infrastructure development,there has been an inc.ease of steel producers working to develop their own capabilities to produce microalloyed steels for this ***,to achieve the desired mechanical property attributes for transmission pipeline applications utilizing a cost effective approach requires metallurgical optimization of the microalloyed *** achieve metallurgical optimization a basic understanding is required in the design of a cost effective alloy and then the proper processing of that alloy design to achieve the optimum microstructure/mechanical *** this sense,many producers in the world,especially those who have only recently,in the past 10 years,developed their capability to produce microalloyed transmission pipeline steels still do not achieve metallurgical optimization of their alloy and *** results in yield losses due to failures,inefficient processing causing productivity losses and additional expensive additions of alloys to compensate for failures and process *** the supplier of plate/coil has the largest percentage effect on the final cost of the pipe,the steel producer must understand proper alloy,microstructure,and process design to produce a uniform and stable plate/coil to be used in pipe *** means that strength,toughness and microstructure must be uniform down the length,across the width and through the cross *** optimization is achieved when this uniformity is achieved with a cost effective *** to that,non-uniformity results in pipe forming,welding,expansion,mechanical property and production issues resulting in downgraded pipe and cost overruns in *** paper will describe targets for p

关键词： microalloy niobium pipeline solubility grain size rolling schedule

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The Use of High Temperature Processing（HTP） Steel for High Strength Oil and Gas Transmission Pipeline Applications

The Use of High Temperature Processing（HTP） Steel for High...

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第五届国际低合金高强度钢会议暨第三届国际超细晶粒钢会议

作者： Douglas G.Stalheim dgs metallurgical solutions Inc. 16110 NE 4th StreetVancouver WA 98684 USA

The trend toward higher operating pressures in gas and oil transmission pipelines over the past 10 years has resulted in an inc.eased demand for higher strength steels such as API X70 and X80 with goo

关键词： HTP acicular ferrite X80 toughness molybdenum niobium pipeline steel

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Metal separations of interest to the Chinese metallurgical industry

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Journal of Rare Earths 2010年第S1期28卷 22-29页

作者： S.R.Izatt N.E.Izatt R.L.Bruening IBC Advanced Technologies Inc.856 E.Utah Valley DriveAmerican ForkUT 84003U.S.A.

IBC Advanced Technologies’ Molecular Recognition Technology(MRT) SuperLig products selectively and rapidly bind with target species enabling their selective removal from *** MRT process can produce a high purity separation product of maximum added value at a competitive *** products have high selectivity for many target species which can inc.ude metal ions,anions,and neutral *** operation,the SuperLig product is first placed in a packed column.A solution containing a mixture of the target species and other chemical species is then passed through the *** target species is removed selectively by the SuperLig product,the column is washed to remove residual feed solution,and the target species is recovered by a minimal quantity of *** result is a pure and concentrated species that can be kept for its value or disposed of *** process is environmentally and ecologically friendly with no organic solvents being *** paper provides a review of some examples of applications of MRT to separations of interest to the Chinese metallurgical *** are several applications of MRT,inc.uding Pd separations from Pt metal refinery streams and low-grade spent catalyst wastes,Rh recovery from spent auto catalyst and other feeds,Re removal from selected impurity ions,Cd removal from Co electrolyte,Bi removal from Cu electrolyte,In and Ge separations from difficult matrices,and removal of bivalent first transition series and other metal ions from acid mine drainage(Berkeley Pit,Montana).Finally,the potential application of MRT to separations involving the recovery of rare earth metals and Li from low-level waste solutions and end-of-life products is discussed.

关键词： selective and environmentally friendly metal separations molecular recognition technology SuperLig platinum group metals minor metals transition series metals rhenium cadmium indium germanium bismuth rare earth metals lithium

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高温轧制工艺(HTP)在高强度油气输送管线钢生产中的应用

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南钢科技与管理 2006年第3期 58-62页

作者： Douglas G. Stalheim 吴永龙（翻译）陆玉勤（校对） dgs metallurgical solutions Inc. 16110 NE 4th Street Vancouver WA 98684 USA 南京钢铁联合有限公司新产品研发中心南京钢铁联合有限公司人力资源部

近10年来油气输送管线的高运行压力，使得市场对具有良好低温韧性的X70、X80高强度管线钢的需求越来越大。当今要求在系列温度范围具有良好韧性的API X70管线项目的含金设计方法通常有两种：一种是获得铁素体／珠光体金相组织的低碳加... 详细信息

近10年来油气输送管线的高运行压力，使得市场对具有良好低温韧性的X70、X80高强度管线钢的需求越来越大。当今要求在系列温度范围具有良好韧性的API X70管线项目的含金设计方法通常有两种：一种是获得铁素体／珠光体金相组织的低碳加锰低舍金高强度钢化学成分设计；一种是获得铁素体／针状铁素体金相组织的低碳加锰加钼的低合金高强度钢化学成分设计。当今要求在系列温度范围具有较高韧性的API X80管线项目的合金设计方法通常是低碳加锰加钼以获得传统的铁素体／针状铁素体组织。这种合金设计方法是生产高强度高韧性油气输送管线钢的通用方法，这在很多文献中也有过描述。近来，一种采用有利于形成铁素体／针状铁素体组织的低碳加锰加高铌的合金设计方法已经成功应用于一条API X80管线项目。该成分设计之所以独特在于它采用合金设计的轧制温度比传统的低碳加锰加钼的合金设计的轧制温度高，同时又能满足API X70或X80管线项目对钢管强度和韧性的要求。此外，不加钼就能获得理想的金相组织、强度和韧性，这对保证钢管母材、热影响区和焊缝的硬度低于260 Hv10也是很有利的。该合金设计能在较高温度轧制对提高产量和减小生产中轧机的制约（轧机栽荷问题，板形问题等）有利，这是需要在较低温度轧制的传统的低碳加锰加钼的合金设计方法所不能比的。该论文阐述了世界上第一条采用低碳加锰只加铌的合金设计和高温轧制工艺（HTP）的API X80输气管线的开发和生产情况。

关键词：高温轧制工艺(HTP) 针状铁素体 X80 韧性钼铌管线钢

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New resistivity/dopant density model for compensated-Si

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Transactions of Nonferrous Metals Society of China 2011年第5期21卷 1172-1177页

作者： Dominic LEBLANC Karol PUTYERA Becancour Silicon inc. Becancour G9H 2V8Canada Evans Analytical Group SyracuseNY 13211USA

Models establishing relationships between electrical resistivity and dopant densities of silicon wafers/bricks are not applicable for compensated-Si, such as upgraded metallurgical grade silicon UMG-Si. To date, no satisfactory theoretical model has been able to explain precisely the variety of new experimental results and observations related to compensated-Si. In this study, a new approach considering equilibrium ionisation constants according to electrolyte theory was proposed, which reproduce, for single-doped Si, Thurber＇s curves of charge carrier＇s mobilities. When more than one doping species are involved, as in compensated-Si, a numerical algorithm has to be used for solving multiple equilibrium systems. The study of such systems demonstrates a particular behaviour known from buffered solutions. Equilibrium constants were calculated from thermodynamic properties of chemical compounds, and a new general theory was proposed using available knowledge of electrochemistry （Nernst equation, Butler-Volmer equation）. Considering that the silicon/dopant systems constitute a weak electrolyte solid solution, it is concluded that the electrolyte solution theory provides a good physical model and mathematical framework to get a better understanding of solar cell＇s behaviour.

关键词： silicon resistivity compensated UMG boron phosphorus

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