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| 1 | Effect of cooling rate on the microstructure and mechanical properties of Nb-microalloyed steels显示文摘 | S. Shanmugam N.K. Ramisetti R.D.K. Misra T. Mannering D. Panda S. Jansto | 2007 | Materials Science & Engineering A2007，，： | 2 |
| 2 | 含铌钢铸坯的冶炼与连铸显示文摘为满足客户日益增加的需求和期望,高强度钢的产品质量也在不断地提高。几乎所有的用户都逐步提高了对钢中残余元素的要求,同时还希望钢材的力学性能更加稳定、纯净度更高,以及表面和内部质量进一步改善。为了高效、低成本生产高强度高品质的汽车用钢、管线钢和结构钢,钢厂必须严格规范好炼钢、钢包精炼和连铸等工艺操作,以在当今竞争激烈的全球钢铁市场中保持竞争力。介绍了目前很多钢铁企业生产高质量含铌钢方坯、板坯及异形坯时在炼钢和连铸操作中所运用的一些要点和建议,这些做法也可以提高普通碳锰钢的产品质量。 | Steven G Jansto 王厚昕(译) 王利(校) | 2010 | 世界钢铁2010，，2： | 2 |
| 3 | Effect of cooling rate on the microstructure and mechanical properties of Nb-microalloyed steels显示文摘 | S. Shanmugam N.K. Ramisetti R.D.K. Misra T. Mannering D. Panda S. Jansto | 2007 | Materials Science & Engineering A2007，，： | 2 |
| 4 | Microstructure and high strength–toughness combination of a new 700<ce:hsp sp='0.25'/>MPa Nb-microalloyed pipeline steel显示文摘 | S. Shanmugam N.K. Ramisetti R.D.K. Misra J. Hartmann S.G. Jansto | 2007 | Materials Science & Engineering A2007，，1： | 1 |
| 5 | An analysis of the microstructure of the heat-affected zone of an ultra-low carbon and niobium-bearing acicular ferrite steel using EBSD and its relationship to mechanical properties显示文摘 | Aimin Guo R.D.K. Misra Jibin Liu Ling Chen Xinlai He S.J. Jansto | 2010 | Materials Science & Engineering A2010，，23： | 1 |
| 6 | Effect of cooling rate on the microstructure and mechanical properties of Nb-microalloyed steels 显示文摘 | SHANMUGAM S RAMISETTI N K MISRA R D K MANNERING T PANDA D JANSTO S | 2007 | Mater Sci Eng A2007，，： | 1 |
| 7 | Impact toughness and microstructure relationship in niobium- and vanadium-microalloyed steels processed with varied cooling rates to similar yield strength显示文摘 | S. Shanmugam R.D.K. Misra T. Mannering D. Panda S.G. Jansto | 2006 | Materials Science & Engineering A2006，，2： | 1 |
| 8 | 21^(st) Century Niobium-Bearing Structural Steels显示文摘Value-added applications of niobium (Nb) microalloyed steels continue to be developed for commercial implementation to meet increased material demands and improved properties for 21st century structural applications. These applications demand Nb-bearing steels that deliver improved toughness, fracture and fire resistance and weldability. Such applications include medium and jumbo beam, boiler, bridge, container, heavy equipment, long product, pressure vessel, ship, storage tank and windtower applications. Steel producers are challenged to develop microalloyed steel grades that cost effectively meet end user demands for higher strength at thinner cross sections, better low temperature toughness to resist brittle fracture in building, pressure vessel and ship structures, sustain higher loads per unit area in earthquake and hurricane zone product applications, demonstrate improved fire-resistance in buildings, bridges and tunnels and provide overall improved weldability. Niobium is often a key element to achieve these results. This paper will discuss Nb market opportunities and key operational practices required to successfully melt, cast and roll these high strength steel grades. Niobium process metallurgy is important to leverage the ability of niobium to obtain ultra-fine grain, homogeneous structural steel microstructures with superior mechanical properties. The process metallurgy, physical metallurgy and resultant properties are significantly determined by mill capabilities, mill practices, operational understanding and the culture of the steel mill. The optimal combination and implementation aspects that are unique to each mill we call metallurgical operational integration (MOI) . MOI is the bridge that links the product requirements to mill capability and process implementation. | Jansto Steven | 2011 | Journal of Iron and Steel Research(International)2011，18，S1： | 1 |
| 9 | Microstructure of high strength niobium-containing pipeline steel显示文摘 | S. Shanmugam R.D.K. Misra J. Hartmann S.G. Jansto | 2006 | Materials Science & Engineering A2006，，1： | 1 |
| 10 | Microstructure of high strength niobium-containing pipeline steel显示文摘 | S. Shanmugam R.D.K. Misra J. Hartmann S.G. Jansto | 2006 | Materials Science & Engineering A2006，，1： | 1 |
| 11 | Development of microalloyed steels for high temperature carburizing显示文摘The potential for use of microalloy additions to suppress abnormal austenite grain growth and produce steels with enhanced bending fatigue resistance after high temperature vacuum carburizing was investigated in a series of Ti-modified SAE 8620 steels with w(niobium) additions up to 0.1%.Results are considered from a series of papers at the Advanced Steel Processing and Products Research Center on the effects of Nb content,heating rate, rolling history,and processing temperature on the evolution of austenite grain structures in carburizing steels. Emphasis is placed on understanding the effects of alloying and processing on each stage in the annealing process including the as received laboratory rolled conditions,during the onset of carburizing after annealing at different heating rates,and after annealing for various times at carburizing temperatures up to 1 100℃.Heating rate to the carburizing temperature was shown to be an influential variable and suppression of abnormal grain growth was dependent on the development of a critical distribution of fine NbC precipitates,stable at the austenitizing temperature.The importance to industrial carburizing practice of heating rate effects on precipitates and austenite grain size evolution are discussed and correlated to selected data on fatigue performance. | David K MATLOCK John G SPEER Steven G JANSTO Marcos STUART | 2010 | Baosteel Technical Research2010，4，S1： | 0 |
| 12 | Effect of Nb on Microstructure Evolution in Cold Rolled Dual-Phase Steels:Interaction of Recovery,Recrystallization and Phase Transformations显示文摘The effects of Nb addition,individually and in combination with Ti,were evaluated over a range of coiling temperatures.Coiling temperature influences the ratio of soluble and precipitated Nb in the hot rolled steel containing 0.08 % C and 2.2 % Mn.Nb bearing precipitates can co-precipitate on TiN and impact the microstructure and mechanical properties of the steel after annealing treatment.Microstructure characterization revealed that recovery and recrystallization processes preceded austenite formation.The effects of Nb on austenite formation in cold rolled steels during heating and isothermal holding and on austenite decomposition during subsequent cooling were investigated using dilatometry.The addition of Nb retarded ferrite recrystallization starting temperature,but had no significant effect on the starting temperature of austenite formation during heating.The Nb addition also accelerated austenite formation once the transformation started,and was beneficial for the formation of a finer and homogeneous microstructure. | Pottore N Fonstein N Bhatta Charya D Jansto S | 2011 | Journal of Iron and Steel Research(International)2011，18，S1： | 0 |
| 13 | High Strength Low Alloy (HSLA) Steels in Building Construction显示文摘Majority of the buildings,including industrial buildings,are constructed using either structural steel (plates and structural shapes) or deformed bar steel reinforced concrete.Such buildings,however,must be designed to be safe and serviceable during construction and during use and occupancy.These objectives can be easily achieved by the use of steels having superior mechanical properties,ductility,weldability,fire resistance,etc.Over the years,the steel industry has made improvements in steel making technologies resulting in high strength low alloy (HSLA) steels with superior steel properties well suited for building construction.First part of this paper presents the structural design considerations,and the constructional considerations associated with the building structures in general,and steel structures in particular.This second part of the paper looks at the acceptance criteria for HSLA steels for North American building codes and construction.The third part of the paper presents the structural properties of currently available HSLA steels for building construction.The discussion focuses on hot-rolled structural steel shapes as well as deformed steel bars for concrete reinforcement.The paper argues that Niobium microalloying is the key to achieving superior properties in such steels. | Sivakumaran Ken Siva Jansto Steven G | 2011 | Journal of Iron and Steel Research(International)2011，18，S1： | 0 |
| 14 | The Contribution of Niobium Bearing Steels and Enhanced Sustainability显示文摘With the growing concern for the environmental impact of greenhouse gases and the rapid depletion of important resources,the use of Nb-bearing steels for advanced high strength steel applications can reduce raw material usage and the carbon footprint.The conservation and more efficient use of ironmaking and steelmaking raw materials is an urgent issue for steel producers globally.Recently-developed Nb-microalloyed steel applications provide a more effective product design and reduce CO 2 emissions and energy consumption per tonne of steel.A sustainability structural steelstudy presents the positive cost and reduced environmental impact of Nb-microalloyed steels.This analysis compares the CO 2 emission reduction and energy savings in the steelmaking process melted in both the Basic Oxygen Furnace (BOF) and the Electric Arc Furnace (EAF).Nb-microalloyed structural steels offer the opportunity to reduce the total weight of a given structure compared to a non-microalloyed steel construction.Generally,one considers the savings associated with less material and lower construction costs.In addition,there is an environmental benefit in the reduction in emissions (kilograms of CO 2) and less energy consumption (GJ) due to the fact that less steel is melted.Plus,there are lighter sections and less material weight in the final end user design which reduces transportation and fabrication costs.A forecasted trend is presented which introduces an increased usage of microalloyed steel grades to replace traditional commodity-type non-alloyed higher carbon-manganese grades for environmental benefits and significant cost reduction. | Jansto Steven | 2011 | Journal of Iron and Steel Research(International)2011，18，S1： | 0 |
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