期刊文献+
共找到11篇文章
< 1 >
每页显示 20 50 100
Carbon Diffusion in Hot Strips of Low Carbon Steel Produced by CSP Line under Different Thermal Histories 被引量:8
1
作者 HaoYU HaoREN +1 位作者 yonglinkang KeluWANG 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2005年第1期21-24,共4页
Two experiments were carried out on the same compact strip production (CSP) line, which differs in that one of them experienced γ→α→γ thermal history. The differences in microstructure, precipitation, misorientat... Two experiments were carried out on the same compact strip production (CSP) line, which differs in that one of them experienced γ→α→γ thermal history. The differences in microstructure, precipitation, misorientation etc between two experiments were investigated by using scanning electron microscopy (SEM), transmission electron microscopy (TEM), electron back-scattered diffraction (EBSD) and positron annihilation technique (PAT). The carbon concentration in matrix is more inhomogeneous in the experiment than that with γ→α→γ7 thermal history. The specific precipitation characteristic in the experiment without γ→α→γ thermal history is discussed on the basis of different carbon diffusion behavior and interaction between dislocation and excess carbon. 展开更多
关键词 Compact strip production MICROSTRUCTURE PRECIPITATION Carbon diffusion DISLOCATION
下载PDF
Quantitative analysis on strengthening mechanism of ultra-thin hot strip of low carbon steel produced by CSP technique 被引量:8
2
作者 HaoYu yonglinkang +4 位作者 XueyingXiong KeluWang JieFu GuijiangChen LiejunLi 《Journal of University of Science and Technology Beijing》 CSCD 2004年第5期425-427,共3页
Based on experimental data of positron annihilation technology, electrolyticdissolution technique, electron back-scattered pattern, etc. and by analysis the strengtheningfactors, the strengthening mechanism of ultra-t... Based on experimental data of positron annihilation technology, electrolyticdissolution technique, electron back-scattered pattern, etc. and by analysis the strengtheningfactors, the strengthening mechanism of ultra-thin hot strip of low carbon steel produced by CSP(Compact Strip Production) technique was investigated. The value of each strengthening mechanism andits contribution percentage to yield strength were achieved. The results show that refinementstrengthening is the predominant strengthening mode; precipitation strengthening and dislocationstrengthening are second to it, their contributions to yield strength are almost equal. 展开更多
关键词 CSP positron annihilation technology electrolytic dissolution technique electron back-scattered pattern strengthening mechanism hot strip
下载PDF
Microstructure evolution and precipitation behavior of low carbon steel hot strips produced by CSP 被引量:3
3
作者 yonglinkang KeluWang +4 位作者 HaoYu JieFu DeluLiu ZhongbingWang XuewenChen 《Journal of University of Science and Technology Beijing》 CSCD 2004年第4期364-367,共4页
The microstructures of low carbon steel before, during and after rollingdeformation of each stand were observed using optical microscope. The result showed that themicrostructures were very fine after six passes rolli... The microstructures of low carbon steel before, during and after rollingdeformation of each stand were observed using optical microscope. The result showed that themicrostructures were very fine after six passes rolling deformation. The effect of the first standreduction on microstructure refinement was very distinct. During the rolling process, with theincrease of the accumulated strain, the microstructures would further refine, and the density ofdislocation would increase at the same time. In continuous casting thin slabs and each finishingstand, lots of observed precipitates were mainly A1_2O_3 and MnS along the grain boundaries or ingrains, which played an important role in the mechanical properties of the hot strips of low carbonsteel produced by CSP (compact strip production) technology. 展开更多
关键词 CSP microstructure REFINEMENT precipitation mechanical property
下载PDF
Microstructure and strengthening parameters of ultra-thin hot strip of low carbon steel 被引量:3
4
作者 HaoYu yonglinkang 《Journal of University of Science and Technology Beijing》 CSCD 2002年第5期356-359,共4页
The microstructure and precipitation mechanism of ultra-thin hotstrip produced by CSP technology were analyzed by electron backscattered diffraction(EBSD), H-800 transmission electronmicroscope(TEM)and thermodynamics ... The microstructure and precipitation mechanism of ultra-thin hotstrip produced by CSP technology were analyzed by electron backscattered diffraction(EBSD), H-800 transmission electronmicroscope(TEM)and thermodynamics theory. The EBSD results show thatthe finishing hot rolling microstructures are mixture ofrecrystallized and deformed austenite. After phase transformation,ferrite gra- ins embody substructures and dislocations that ledultra-thin hot strip high strength and relatively low elongationrate. TEM observations show that there are a lot of fine anddispersive precipitates in microstructure. 展开更多
关键词 CSP EBSD MICROSTRUCTURE precipitation
下载PDF
A new model for life prediction of GH4133 under TMF conditions 被引量:2
5
作者 JianguoWang HongyingWang +2 位作者 ShipingXu LianqingWang yonglinkang 《Journal of University of Science and Technology Beijing》 CSCD 2002年第4期287-291,共5页
Thermal mechanical cyclic strain tests were carried out under in-phase andout-of-phase conditions on a Nickel-base Superalloy GH4133 in the temperature range of 571-823 degC. Based on analyzing the present models of T... Thermal mechanical cyclic strain tests were carried out under in-phase andout-of-phase conditions on a Nickel-base Superalloy GH4133 in the temperature range of 571-823 degC. Based on analyzing the present models of TMF (thermal mechanical fatigue) life prediction, a newmodel for predicting nickel-base superalloy TMF lifetime was proposed. TMF life of superalloy GH4133was calculated accurately based on the new model. Experimental TMF life has been compared with thecalculated results and all results fall in the scatter band of 1.5. The calculating results showthat the new model is not only simple, but also precise. This model will play great roles as lifeprediction of the metal materials and the engineering components subjected to non-isothermal serviceconditions. 展开更多
关键词 thermal mechanical fatigue life production Nickel-base superalloy fatigue lifetime prediction model IN-PHASE out-of-phase
下载PDF
FEM Simulation of Bending Formability for Laminate Steel/Resin/Steel Lightweight Composite Sheet 被引量:1
6
作者 GuanchengLI yonglinkang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2003年第4期324-326,共3页
关键词 RESIN Laminate steel sheet BENDING FORMABILITY Numerical simulation
下载PDF
Grain refinement of low carbon steel produced by CSP process 被引量:1
7
作者 XiangdongHuo DeluLiu +3 位作者 YuanliWang NanjingChen yonglinkang JieFu 《Journal of University of Science and Technology Beijing》 CSCD 2004年第2期133-137,共5页
In comparison with conventional production for hot strips, compact strip production (CSP) brings about some new micro-structural phenomena. Investigations were carried out to clarify the grain refinement mechanism of ... In comparison with conventional production for hot strips, compact strip production (CSP) brings about some new micro-structural phenomena. Investigations were carried out to clarify the grain refinement mechanism of low carbon steel strips produced by the EAF-CSP process. Samples, obtained from the same rolling stock during continuous rolling, were examined through SEM, TEM and XEDS. Thin slabs have a dominant columnar structure and the spacing of the secondary dendrite arms ranges from 90 to -125 μm. The average grain sizes for the central area of the samples from the 1st to 6th pass are 41.6, 25.2, 21.4, 20.2, 13.1, 6.7 μm, respectively. Large number of nanometer oxide and sulfide have been found in the low carbon steel produced by the CSP process. The grain refinement mechanism can be summarized as follows: finer solidification structure of the thin slab; austenite recrystalliza-tion at higher temperature and stain accumulation at lower temperature caused by the great reduction of single rolling pass during continuous rolling; nano-scaled precipitates of sulfide and oxide which drag grain boundaries of austenite or ferrite to prevent the grain coarsening. 展开更多
关键词 low carbon steel hot strips CSP process microstructure evolution grain refinement
下载PDF
Influence of copper on quality of hot strips by EAF-CSP process
8
作者 YuanliWang DeluLiu +4 位作者 WeiranShao JieFu yonglinkang DeguangZhou ZhongbingWang 《Journal of University of Science and Technology Beijing》 CSCD 2004年第1期57-61,共5页
Electron microscopy and X-ray Energy Dispersive Spectroscopy (XEDS) study oninfluence of Cu on low carbon hot strips produced by CSP (Compact Strip Production) process has beencarried out. The results indicated that c... Electron microscopy and X-ray Energy Dispersive Spectroscopy (XEDS) study oninfluence of Cu on low carbon hot strips produced by CSP (Compact Strip Production) process has beencarried out. The results indicated that copper segregation and enrichment at interfacial layerbetween oxidized surface and steel matrix is the key factor, which results in microcracks and edgeflaws on the strips. The primary considerations to prevent detrimental effects from Cu includecontrolling copper content in proper level, higher soaking temperature and non-oxidizable atmosphereduring soaking. Copper sulfide precipitates with nanometers in size were observed, they may bebeneficial to the properties of CSP products, and influence of Cu on quality of CSP hot strips isdiscussed. 展开更多
关键词 Cu segregation surface flaws CSP hot strips copper sulfide nano-scaledprecipitates
下载PDF
Metallurgical quality of CSP thin slabs
9
作者 DeguangZhou JieFu +3 位作者 yonglinkang ZhongbingWang: JingLi ZhongboXu 《Journal of University of Science and Technology Beijing》 CSCD 2004年第2期106-109,共4页
The casting structure, chemical composition segregation, dendrite arm space,inclusiona and during the CSP (compact strip production) rolling process were investigated. Theresults show that the CSP thin slab has a feat... The casting structure, chemical composition segregation, dendrite arm space,inclusiona and during the CSP (compact strip production) rolling process were investigated. Theresults show that the CSP thin slab has a feature of uniform fine grains, more columnar crystals,less central porosity and segregation etc. There is no great difference in macrostructure betweenthe CSP thin slab and conventional slab; however, the fine dendrite structure of the CSP slab ismore uniform. Moreover, the central porosity and segregation are obviously improved after the firstpass; and the dendrite is bent along the rolling direction rather than broken into pieces. Smallinclusions with the diameter less than 10 mum in the CSP slab are dominantly consisted of aluminatesformed by Al deoxidation and Ca treatment and not floating out of the melt. The large sizeinclusions found in the continuous casting slab are very few. 展开更多
关键词 CSP casting structure SEGREGATION dendrite arm space INCLUSION
下载PDF
Prediction and determination of both friction coefficient and forming force on sheet metal deep-drawing
10
作者 Junxiang yonglinkang 《Journal of University of Science and Technology Beijing》 CSCD 2002年第5期360-362,共3页
On the basis of the criterion of no-wrinkle, the principle and method of prediction and determination of both friction coefficient and forming force on sheet metal deep-drawing are put forward, and proved it's exp... On the basis of the criterion of no-wrinkle, the principle and method of prediction and determination of both friction coefficient and forming force on sheet metal deep-drawing are put forward, and proved it's expedience and practicability. They are suitable for assessment of lubricant properties. Friction coefficient and forming force are a function of material parameter, design parameter and process parameter, especially relative prevent wrinkle blank-holder force. Product of both friction coefficient and prevent wrinkle blank-holder force is only function of process parameter after determining material parameter and design parameter. 展开更多
关键词 DEEP-DRAWING friction coefficient forming force prediction and determination
下载PDF
Ultrafine microstructure in microalloyed steel by a new thermomechnical process
11
作者 YuanliWang yonglinkang 《Journal of University of Science and Technology Beijing》 CSCD 2002年第2期114-117,共4页
Low carbon microalloyed steel containing 0.062 percent C, 2.34 percent Mn,0.044 percent Nb, 0.029 percent Ti, 0.032 percent V in mass fraction and small amount of B wasprepared in laboratory. Slabs of the steel were r... Low carbon microalloyed steel containing 0.062 percent C, 2.34 percent Mn,0.044 percent Nb, 0.029 percent Ti, 0.032 percent V in mass fraction and small amount of B wasprepared in laboratory. Slabs of the steel were rolled into plates of 6mm in thickness followed byaccelerated cooling. The plates possess very high yield strength and reasonable ductility, and theyield ratio is about 0.8. Ultra-fine ferrite structure with micrometer dimension was observed in thesurface layer of the plates. Moreover, the effect of the finishing rolling temperature on the finalmicrostructure and formation mechanism of ultra-fine ferrite as well as the gamma->alphatransformation behavior of the steel was discussed. 展开更多
关键词 microalloyed steel gamma->alpha transformation grain refinement microstructure boron-containing steel
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部