【摘 要】
：
High temperature X-ray diffraction( HTXRD) was employed to investigate phase transformations of the thermally grown wustite ( Fe1-xO) within the oxide scale.The quantitative analysis of the relative p
【机 构】
：
School of Mechanical,Materials & Mechatronic Engineering,University of Wollongong,Wollongong,NSW 252
论文部分内容阅读
High temperature X-ray diffraction( HTXRD) was employed to investigate phase transformations of the thermally grown wustite ( Fe1-xO) within the oxide scale.The quantitative analysis of the relative phases,wustite,magnetite( Fe3O4 ),hematite ( a-Fe2O3 ) and α-Fe,during the decomposition of wustite in oxide scale at 550,500 and 450℃ were obtained by use of linear position sensitive detectors.The HTXRD results show that the diffraction patterns of eutectoid products( magnetite and α-Fe) develop with oxidation time and temperature with various thickness of oxide scale.The eutectoid transformation balances during the long period of time,with reflections corresponding to more intensity of magnetite than that of a-Fe.Eutectoid products in the oxide scale for thickness more than 15 μm have a decrease with the increase of temperature.However,for hematite it increases.The HTXRD gives potential insights on the phase evolution of oxide scale occurring after hot rolling,and it also provides the preliminary profiles of grain-size distribution for the analysis of the grain orientations.
其他文献
针对4＃RH在实际生产过程中由于高温熔体的粘附或冷却后的凝固粘结,造成RH真空槽、浸渍管经常会出现结渣等问题,本文分别从精炼工艺流程、生产操作及精炼渣的组成等方面对RH结渣的形成原因进行了分析,得出真空槽结渣主要是由于喷溅造成的，在实际生产中能够通过摄像头观察到大量的颗粒状物质向上聚集,对真空槽结渣的主要成分进行分析,主要是铁和锰的氧化物;浸渍管结渣与钢包结渣造成钢包超重类似,是浸渍管耐材、钢包渣
With the industrialization process all over the world,problems that energy consume too fast and serious energy crisis have appeared.The use of heat insulation refractory is one of the main factors to
为改善武钢CSP产线钢水的连浇性,通过工业试验对钙处理钢中夹杂物的变化进行了研究,试验结果表明,钙处理后,钢中夹杂由Al2O3和MnS转变为铝酸钙盐或CaO-Al2O3-MgO-CaS复合夹杂,由于钙处理对夹杂物的聚合变性作用,钢中≥5μm夹杂物比例增加.通过热力学计算分析了钙处理对夹杂物变性的条件.根据试验结果对工艺进行了优化,钢水结瘤断浇次数由3.6次/月降低到1.5次/月。
针对高品质帘线钢对钢中夹杂物组分及钢液洁净度的严格要求,系统的开展了钢包顶渣组成和精炼工艺流程的研究.理论研究结果和生产实践表明,精炼过程将钢包顶渣二元碱度( CaO/SiO2)控制在1.0左右,渣中Al2O3含量控制在6％～8％,可以将夹杂物基本控制在低熔点塑性区域;与DeS-LD-LF-Ar-CC工艺相比,采用DeS-LD-LF-RH-CC生产工艺可以在实现夹杂物塑性化转变的同时进一步降低钢中
为了考察低SiO2高Al2O1含量的转炉终渣对MgO-C砖的侵蚀及粘渣性能的影响,以钢包渣、钒铁冶炼渣和辅料为原料,在实验室配制了不同SiO2含量和Al2O3含量的转炉冶炼终渣.1600℃条件下,分别在MoSi2高温炉内和N2气氛炉内进行了MgO-C砖的静态渣侵试验以及粘渣试验.研究结果表明,随着渣中SiO2含量减少Al2O3含量增加,熔渣对MgO-C砖的侵蚀呈加剧趋势.主要原因是随着渣中Al2O
Submerged Arc Furnace is widely used as ore smelter in reduction of nickel oxide mine.In this paper,the calculation of main parameter in submerged arc furnace is summarized.Then 3D finite element mode
This paper studies on the subject that calculates melt flow characteristics of multi-strand tundish.For researchers.water model experiment is one of the principal means to calculate the melt flow char
Confecting dust and mud conglomeration with carbon reducer in dust and mud containing iron.It can self deoxidize.Ferric and zinc oxide carry out self deoxidize in existing equipment to reclaim metal,w
The revenue produced by a pipeline depends on the rate that the fluid can be pumped along its length.It has been recognized for some time that the benefit-to-cost ratio increases with strength level.I
Through the organic integration of microalloying,controlled rolling and cooling technology,large quantities of nano-precipitation particles were obtained in high grade pipeline steels.The morphology o