武钢烟气余热利用的现状及其设想

ＣＵＲＲＥＮＴＳＴＡＴＵＳＡＮＤＡＳＳＵＭＰＴＩＯＮＯＮＵＴＩＬＩＺＡＴＩＯＮＯＦＳＭＯＫＥＲＥＳＩＤＵＡＬＨＥＡＴＩＮＷＩＳＣＯＬｉａｎｇＧｕｉｘｉｕＷａｎｇＤｅｃｈａｎｇＬｉｕＹｕｃｈｕ（Ｉｒｏｎ＆ＳｔｅｅｌＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅ）ＳｙｎｏｐｓｉｓＴｈｅｄｉｆｆｅｒｅｎｃｅａｎｄｐｏｔｅｎｔｉａｌｏｆｕｔｉｌｉｚａｔｉｏｎｏｆｓｍｏｋｅｒｅｓｉｄｕａｌｈｅａｔｉｎＷＩＳＣＯａｒｅａｎ－ａｌｙｚｅｄｂａｓｅｄｏｎｔｈｅｃａｌｃｕｌａｔｉｏｎｒｅｓｕｌｔｏｆｅｘａｍｉｎａｔｉｏｎａｎｄｓｔａｔｉｓｔｉｃｄａｔａｉｎｃｏｍｐａｒｉｓｉｏｎｗｉｔｈｔｈｅａｄ－ｖａｎｃｅｄｓｋｉｌａｔｈｏｍｅｏｒａｂｒｏａｄ，ａｎｄａｓｓｕｍｐｔｉｏｎａｎｄｒｅｃｏｍｍｅｎｄａｔｉｏｎｏｎｆｕｒｔｈｅｒｉｎｐｒｏｖｅｍｅｎｔｏｆｒｅｓｉｄｕａｌｈｅａｔｅｆｉｃｉｅｎｃｙａｒｅｐｏｉｎｔｅｄｏｕｔ．Ｋｅｙｗｏｒｄｓｓｍｏｋｅｒｅｓｉｄｕａｌｈｅａｔｅｆｉｃｉｅｎｃｙｃｕｒｒｅｎｔｓｔａｔｕｓａｓｓｕｍｐｔｉｏｎ     

Application of BAIRD Photoelectric Spectrometer in Quantitative Analysis of Iron and Steel

ＡｐｐｌｉｃａｔｉｏｎｏｆＢＡＩＲＤＰｈｏｔｏｅｌｅｃｔｒｉｃＳｐｅｃｔｒｏｍｅｔｅｒｉｎＱｕａｎｔｉｔａｔｉｖｅＡｎａｌｙｓｉｓｏｆＩｒｏｎａｎｄＳｔｅｅｌＳｕＺｈｉ①ＡＢＳＴＲＡＣＴＢＡＩＲＤＳＰＥＣＴＲＯＶＡＣ２０００（ＤＶ５）ｃｏｎｓｉｓｔｉ...     

General Contents

Ｔｉｔｌｅ　　　　　　Ｉｓｓｕｅ　Ｐａｇｅ　Ｔｉｔｌｅ　　　　　　Ｉｓｓｕｅ　Ｐａｇｅ　　　　　ＲｅｖｉｅｗａｎｄＳｐｅｃｉａｌＳｕｂｊｅｃｔ　　　ＲｅｖｉｅｗａｎｄＰｒｏｓｐｅｃｔｓａｔ 10ｔｈＡｎｎｉｖｅｒｓａｒｙｏｆＣｏｍｍｉｓｓｉｏｎｉｎｇｏｆＺｉｎｃＳｙｓｔｅｍｉｎＮｏｒｔｈｗｅｓｔＬｅａｄ＆ＺｉｎｃＳｍｅｌｔｅｒ 1　　 1　　ＰｅｎｅｔｒａｔｉｎｇＡｎａｌｙｓｉｓｏｆＲｅｐｅａｔｅｄＣｏｎｓｔｒｕｃｔｉｏｎｉｎＡｌｕｍｉｎｕｍＳｍｅｌｔｉｎｇＩｎｄｕｓｔｒｙ 2　　 1　　ＯｎＩｍｐｒｏｖ…     

The Abstracts of Papers in Special Issue on the Seventh Five Year Project for Rare Earths of Chinese Academy of Sciences （in Chinese）

ＴｈｅＡｂｓｔｒａｃｔｓｏｆＰａｐｅｒｓｉｎＳｐｅｃｉａｌＩｓｓｕｅｏｎｔｈｅＳｅｖｅｎｔｈＦｉｖｅＹｅａｒＰｒｏｊｅｃｔｆｏｒＲａｒｅＥａｒｔｈｓｏｆＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃｅｓ（ｉｎＣｈｉｎｅｓｅ）ＳｔｕｄｙｏｎＭａｔｅｒｉａ...     

Phase Analysis of Titanium in Steel and Some Aspectson Their Application

ＰｈａｓｅＡｎａｌｙｓｉｓｏｆＴｉｔａｎｉｕｍｉｎＳｔｅｅｌａｎｄＳｏｍｅＡｓｐｅｃｔｓｏｎＴｈｅｉｒＡｐｐｌｉｃａｔｉｏｎＣＨＥＮＭｉｎｇＨａｏａｎｄＳＨＥＮＲｕＭｅｉＰｈａｓｅＡｎａｌｙｓｉｓｏｆＴｉｔａｎｉｕｍｉｎＳｔｅｅｌａｎｄＳｏｍｅＡｓｐ...     

Geochemistry of Rare Earth Elements in Xikeng Ag-Pb-Zn Ore Deposit, South Anhui, China

ＴｈｅＳｏｕｔｈＡｎｈｕｉｉｓｌｏｃａｔｅｄｉｎｔｈｅｌｏｗｅｒＹａｎｇｔｚｅＲｉｖｅｒｐｌａｔｆｏｒｍａｌｆｏｌｄｂｅｌｔｏｆｔｈｅＹａｎｇｔｚｅｐａｒａｐｌａｔｆｏｒｍｉｎＪｉａｎｇｎａｎ .Ａｌａｒｇｅ ｓｃａｌｅｔｒａｎｓｇｒｅｓｓｉｏｎｓｉｎｃｅｔｈｅｌａｔｅＳｉｎｉａｎａｆｔｅｒｅａｒｌｙＳｉｎｉａｎＮａｎｔｕｏｇｌａｃｉａｌｐｅｒｉｏｄｌｅｄａｂｌａｃｋｓｈａｌｅｆｏｒｍａｔｉｏｎｃｏｎｓｉｓｔｉｎｇｏｆｂｌａｃｋｃａｒｂｏｎａ ｃｅｏｕｓｓｈａｌｅ ,ｃａｒｂｏｎａｃｅｏｕｓｍｕｄｓｔ…     

Synthesis and Catalytic Activities of Polymer-Supported Neodymium Complexes——Polymers Containing Thiol and Sulphoxide

Ｐｏｌｙｍｅｒｓｃｏｎｔａｉｎｉｎｇｔｈｉｏｌａｎｄｓｕｌｐｈｏｘｉｄｅｗｈｉｃｈｈａｖｅａｃｔｉｖｅ—ＳＨａｎｄ—ＳＯｇｒｏｕｐｓｗｅｒｅｕｓｅｄｉｎｂｉｏｌｏｇｉｃａｌ,ｐｈａｒｍａｃｅｕｔｉｃａｌ,ｉｎｄｕｓｔｒｉａｌａｎｄｏｔｈｅｒｃｈｅｍｉｃａｌｆｉｅｌｄｓ .Ａｓ—ＳＨａｎｄ—ＳＯｇｒｏｕｐｓａｒｅｅａｓｙｔｏｆｏｒｍｃｏｍｐｌｅｘｅｓｗｉｔｈｍｅｔａｌｓ ,ｓｏｔｈｅｙｈａｖｅａｒｏｕｓｅａｎｉｎｃｒｅａｓｉｎｇｉｎｔｅｒｅｓｔｏｆｍａｎｙａｕｔｈｏｒｓ .Ａｌａｒｇｅｎｕｍｂｅｒｏｆｆｕ…     

Synthesis of a Polyaminopolycarboxylic Acid and Fluorescence of Tb~(3 ) Complexes in Aqueous Solution

ＳｙｎｔｈｅｓｉｓｏｆａＰｏｌｙａｍｉｎｏｐｏｌｙｃａｒｂｏｘｙｌｉｃＡｃｉｄａｎｄＦｌｕｏｒｅｓｃｅｎｃｅｏｆＴｂ３＋ＣｏｍｐｌｅｘｅｓｉｎＡｑｕｅｏｕｓＳｏｌｕｔｉｏｎＧｏｎｇＭｅｎｇｌｉａｎ（龚孟濂），ＷｕＷｅｉｎｉｎｇ（吴炜宁），ＳｈｉＨｕ...     

常用技术词汇缩写英汉对照(一)

ＡＡ(ＡｂｓｏｌｕｔｅＡｄｄｒｅｓｓ)———绝对地址ＡＡ(ＡｕｔｏｍａｔｉｃＡｎｓｗｅｒ)———自动应答ＡＣ(ＡｃｃｅｓｓＣｙｃｌｅ)———存取周期ＡＬ(ＡｓｓｅｍｂｌｙＬａｎｇｕａｇｅ)———汇编语言ＡＡＰ(ＡｎａｌｙｓｔＡｓｓｉｓｔａｎｃｅＰｒｏｇｒａｍ)———分析员辅助程序ＡＡＳ(ＡｕｔｏｍａｔｉｃＡｄｄｒｅｓｓｉｎｇＳｙｓｔｅｍ)———自动访问系统ＡＢＣ(ＡｕｔｏｍａｔｉｃＢａｎｄｗｉｄｔｈＣｏｎｔｒｏｌ)———自动带宽控制ＡＬＣ(ＡｕｔｏｍａｔｉｃＬｏｃｋｉｎｇＣｉｒｃｕｉｔ)———自动自保线路ＡＮＩ…     

Analysis of Photoelectric Hybridization Measurementon Shearing Force for Flat Shearer

ＡｎａｌｙｓｉｓｏｆＰｈｏｔｏｅｌｅｃｔｒｉｃＨｙｂｒｉｄｉｚａｔｉｏｎＭｅａｓｕｒｅｍｅｎｔｏｎＳｈｅａｒｉｎｇＦｏｒｃｅｆｏｒＦｌａｔＳｈｅａｒｅｒＱＵＺｈｉＨａｏＡｎａｌｙｓｉｓｏｆＰｈｏｔｏｅｌｅｃｔｒｉｃＨｙｂｒｉｄｉｚａｔｉｏｎＭｅａｓｕ...     

基于数值模拟的镍基高温合金电渣重熔工艺优化

利用MeltFlow软件对镍基高温合金电渣重熔过程进行数值模拟计算,探究了电渣重熔过程中温度场、流场、熔池形貌及微观组织的分布特点,通过工业试验验证模拟的准确性,定量分析熔速对熔炼过程的影响规律,提出了一种改善铸锭凝固质量的工艺优化方法.结果 表明,渣池内的温度相对较高且分布均匀,熔池形貌近似"V"型.铸锭一次枝晶间距...     

结晶器旋转数值模拟及对高速钢电渣锭碳化物的影响

为了改善M2高速钢中的碳化物分布,通过数值模拟详细分析了结晶器旋转对M2高速钢电渣重熔过程温度场、金属熔池形状的影响,并进一步通过实验室双极串联结晶器旋转电渣炉研究了旋转速率对M2高速钢电渣重熔过程的影响。采用扫描电镜观察并分析了结晶器旋转对电渣锭中碳化物形貌、分布的影响;采用小样电解萃取实验,分析了结晶器旋转速率对碳化物组成的影响。结果发现,随着结晶器旋转速率的增加,渣池的高温区从芯部向边部迁移,温度分布更加均匀;金属熔池的深度变浅,两相区的宽度收窄,从而导致局部凝固时间降低、二次枝晶间距减小。与此相对应,随着结晶器旋转速率的增加,M2电渣锭的渣皮更薄、更加均匀,结晶器对电渣锭的冷却强度更大,碳化物网格开始破碎、变薄,碳化物由片状改变为细小的棒状。X射线衍射分析表明,不论结晶器是否旋转,碳化物的类型始终不变,由M₂C、MC和M₆C组成,但是随旋转速率增加M₂C含量增加,MC和M₆C含量降低。碳化物组织得以改善的主要原因在于,结晶器旋转导致金属熔池深度降低、两相区宽度收窄,改善了凝固条件,减轻了元素偏析。      

Microstructure homogeneity of high speed steel M2 ingot by electroslag remelting

The homogeneity of the microstructure in M2 high speed steel ingot with a diameter of 400mm was studied by means of electroslag remelting process combined with numerical simulation. The microstructure differences between the center and the edge of the ingot were compared. The effects of local solidification time on eutectic carbides were discussed. The result shows that the size of the eutectic colonies varies from 100??m to 400??m near the center of the ingot, and lamellar eutectic carbides can reach a maximum thickness of tens of microns, and a length of more than 100??m. The maximum local solidification time is about 1300s at the center of ingot by calculation. Close to the edge of the ingot, the columnar crystals become small, and the size of eutectic colonies is among 50-200??m, and eutectic carbide lamellae are about 10??m in width, and tens of microns in length. The local solidification time at the edge of ingot is as short as 365s. When solidification of the ingot becomes quasi- steady state during electroslag remelting, the metal pool is pot- bottom- like. The pool depth is about 178mm by experiment, and the calculated pool depth is in accordance with that of experiment.     

电流对电渣重熔过程多场耦合行为和凝固参数影响的数值模拟

摘要：利用了FLUENT软件建立了电渣重熔（ESR）过程二维轴对称瞬态模型。使用有限体积法求解耦合的电磁场、动量和能量守恒方程,铸锭的凝固过程由焓 多孔介质模型处理,系统地研究了电流对电渣重熔GH984G凝固过程多场耦合行为和凝固参数的影响规律。模拟结果表明：电流由2.3kA增大为2.5kA,体系中电流密度、磁感应强度、洛伦兹力和焦耳热均增大;进而导致了熔渣流速增大,渣池和金属熔池温度增大,熔池变深;铸锭的一次和二次枝晶间距也相应增大,相对瑞利数增加,黑斑形成趋势也随之增大;计算结果与实验结果吻合较好。     

电渣重熔板锭过程中温度场的动态模拟

根据钢的电渣重熔过程的特点,建立了板锭电渣重熔的非稳态模型,以模拟在不同重熔速度下板锭重熔过程的温度场和分析影响金属熔池深度的因素。模拟结果表明:横截面尺寸400 mm ×2000 mm,20 t板锭重熔过程中,当重熔速度3～5 mm/min时,重熔速度越大,熔池深度越深;当重熔锭的高度达到铸锭厚度的2倍左右时,系统处于准稳定状态,熔池深度不再变化。     

T型结晶器抽锭电渣重熔高速钢90 mm方锭新工艺

 晶界处碳化物严重影响高速工模具钢的红硬性和耐磨性能,电渣重熔工艺能够有效地改善钢锭中碳化物尺寸及分布。传统电渣重熔生产较小钢锭的截面尺寸约为[?]200 mm,减小钢锭截面尺寸和增大冷却速率将会进一步减轻碳化物的偏析程度,但将降低生产效率、提高生产成本。采用双极串联、T型结晶器、抽锭电渣重熔新工艺生产90 mm方锭,并与相同熔化速度传统电渣重熔生产[?]200 mm钢锭进行对比试验。对钢锭成分、低倍、夹杂物、显微组织进行检验分析结果表明,90 mm方钢锭中碳化物尺寸和分布明显优于[?]200 mm钢锭,碳化物在后序锻造或轧制过程中更容易被破碎。新工艺电耗也低于传统电渣重熔工艺。     

Influence of Thermal Homogenization Treatment on the Structure and Impact Toughness of H13 ESR Steel

 High levels of isotropy and homogeneous structure are very important criterion for high quality H13 hot work steel. In this paper, the cast microstructure of H13 ESR ingot and the influence of high temperature diffusion treatment on the structure and impact toughness have been investigated. The results show that: the dendrite arm spacing gradually becomes wide from the surface to the center of ingot and the interdendritic segregation areas always exist large primary carbides particles; by means of high temperature diffusion treatment of ingot prior to hot forging, the banded segregation is nearly eliminated, the annealed structure is more uniform and the isotropy properties have been improved remarkably.     

电渣重熔GH984G定向凝固组织CAFE法模拟

 电渣重熔凝固组织的控制直接关系到高温合金的品质与实际生产应用。针对电渣重熔GH984G的定向凝固过程,同时考虑传热和溶质扩散,基于CAFE法与C语言结合,建立了三维电渣重熔凝固过程组织演变的CAFE模型,并对凝固过程温度场和凝固组织演变进行模拟预测。结果表明,铸锭温度场和熔池深度都是首先为较浅平状态,然后不断加深至最后稳定;在电极熔化初始,金属熔池浅平,枝晶生长方向是竖直向上,之后金属熔池不断加深,底部竖直向上的柱状晶方向变为斜向上约26°。同时在铸锭的中心线上出现了等轴晶,等轴晶形核长大后与柱状晶镶嵌生长。此外,随着电极熔速变大,渣金界面上涨速度也随之变大,且熔池深度相应变宽变深。模拟结果与试验结果基本吻合,从而验证了模型与形核参数的适用性。     

The effect of grain refining on macrosegregation and dendrite arm spacing of direct chill cast AA5182

The effect of titanium and titanium diboride inoculation on the spatial variation of local solidification time for direct chill (DC) cast ingots of aluminum alloy 5182 (AA5182) was studied. The results have been compared to those of an ingot cast without grain refining. To accomplish this, the effect of grain refining on a number of ingot characteristics such as grain size, macrosegregation, spatial variation of dendrite arm spacing, and thermal conductivity was investigated. Furthermore, the effect of grain refining on the well-known relationship between dendrite arm spacing and local solidification time had to be established for AA5182. The results indicated that the spatial variation of dendrite arm spacing in the industrial ingots was independent of grain refining, although the nonrefined ingot produced significantly finer dendrite arm spacings in its center. This was attributed to the influence of showering crystals in the nonrefined ingot. The relationship between dendrite arm spacing and local solidification time was also found to be independent of grain refining.     

旋转电极电渣重熔过程熔滴滴落及熔池形状的模拟

建立了瞬态三维耦合数学模型以探索旋转电极对电渣重熔过程中电磁场、流场、温度场和熔池形状的影响.通过求解麦克斯韦方程组得到电磁场的相关信息,利用VOF方法描述金属熔滴的运动,采用焓-多孔介质模型计算凝固过程.当电极旋转,金属熔滴在离心力作用下,从电极边缘抛出,增加了金属熔滴在渣池中停留的时间与沿途路径,有利于提高电渣重熔...