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| 1 | Oxide and Sulfide Dispersive Precipitation and Effects on Microstructure and Properties of Low Carbon Steels显示文摘Electron microscopic investigation on low carbon steel strips produced by the CSP process has been carried out.Large number of oxide dispersive precipitates have been observed in the ferrite matrix of the steel strips. Dimensionof them is about 10~20 nm. Electron diffraction study showed that the structure of these precipitates consists withcubic system spinel structure. Their lattice parameter is about 0.83 nm. The results implied that they should becomplex oxides of Fe, Al et al. Small sulfide particles with 100~300 nm in size have also been observed. Remarkablestrengthening and grain refinement effects can be obtained by the precipitations. The oxygen and sulfur in steelscould play beneficial role under certain conditions. | DeluLIU ZhongbingWANG 等 | 2002 | Journal of Materials Science & Technology2002，18，1： | 29 |
| 2 | Microstructure evolution and precipitation behavior of low carbon steel hot strips produced by CSP显示文摘The microstructures of low carbon steel before, during and after rolling deformation of each stand were observed using optical microscope. The result showed that the microstructures were very fine after six passes rolling deformation. The effect of the first stand reduction on microstructure refinement was very distinct. During the rolling process, with the increase of the accumulated strain, the microstructures would further refine, and the density of dislocation would increase at the same time. In continuous casting thin slabs and each finishing stand, lots of observed precipitates were mainly Al2O3 and MnS along the grain boundaries or in grains, which played an important role in the mechanical properties of the hot strips of low carbon steel produced by CSP (compact strip production) technology. | YonglinKang KeluWang HaoYu JieFu DeluLiu ZhongbingWang XuewenChen | 2004 | Journal of University of Science and Technology Beijing2004，11，4： | 3 |
| 3 | Grain refinement of low carbon steel produced by CSP process显示文摘In comparison with conventional production for hot strips, compact strip production (CSP) brings about some new microstructural 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 recrystallization 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. | XiangdongHuo DeluLiu YuanliWang NanjingChen YonglinKang JieFu | 2004 | Journal of University of Science and Technology Beijing2004，11，2： | 1 |
| 4 | Influence of copper on quality of hot strips by EAF-CSP process显示文摘Electron microscopy and X-ray Energy Dispersive Spectroscopy (XEDS) study on influence of Cu on low carbon hot strips produced by CSP (Compact Strip Production) process has been carried out. The results indicated that copper segregation and enrichment at interfacial layer between oxidized surface and steel matrix is the key factor, which results in microcracks and edge flaws on the strips. The primary considerations to prevent detrimental effects from Cu include controlling copper content in proper level, higher soaking temperature and non-oxidizable atmosphere during soaking. Copper sulfide precipitates with nanometers in size were observed, they may be beneficial to the properties of CSP products, and influence of Cu on quality of CSP hot strips is discussed. | YuanliWang DeluLiu WeiranShao JieFu YonglinKang DeguangZhou ZhongbingWang | 2004 | Journal of University of Science and Technology Beijing2004，11，1： | 0 |
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