冷轧方式对常化50W470组织织构及磁性能的影响

利用金相显微镜和XRD衍射仪等设备研究了连续冷轧和可逆冷轧钢带对常化50W470组织织构及磁性能的影响。研究结果表明:连续冷轧钢带退火后的平均晶粒尺寸约为88μm,可逆冷轧钢带退火后的平均晶粒约为69μm;连续冷轧和可逆冷轧后织构都汇集在α和γ取向线上;连续冷轧和可逆冷轧的冷轧和退火织构都是在α取向线上。=15°偏向{001}110和=30°偏向{112}110织构处的取向密度相差比较明显,而γ取向线上的取向密度相差不大;连续冷轧成品铁损为:P1.5/50=2.94 W/kg,磁感为:B5000=1.729 T;可逆冷轧成品铁损为:P1.5/50=3.04 W/kg,磁感为:B5000=1.729 T。     

酒钢不锈钢冷轧连续退火炉技术

从不锈钢冷轧退火工艺开始,介绍了酒钢不锈钢冷轧连续退火炉设备特点和生产工艺。     

SUS304不锈钢冷轧硬态板型质量对活套跑偏的影响分析

不锈钢冷轧硬态带钢在连续退火机组入口活套内经常出现跑偏现象,造成机组异常停机、带钢实物和设备受损,对冷轧带钢产量和质量均造成不良影响.本文介绍了二十辊森吉米尔轧机性能和结构以及板型控制和调整方式,研究了冷轧硬态板在连续退火机组出入口活套工段跑偏的原因和影响因素,并制定解决方案和改进措施.研究表明,冷轧硬态基础板型质量是...     

连续退火炉筑炉工程施工技术

一、工程概况宝钢冷轧厂从日本新日铁公司引进的冷轧带钢连续退火工艺线,是把冷轧带钢的酸洗清理、退火时效、光洁平整、检查重卷等分别进行的工艺处理过程有机的组合在一起,形成一个连续的流水生产线,从而使冷轧带钢的生产技术、生产工艺发生了根本性的变革,为冷轧带钢生产开创了新局面。与罩式退火炉比较其产量可提高几十倍。连续退火炉是连续退火工艺生产线的一个重要组成部分,它由七个相对独立的炉室组成(如图1)。各炉室的功能及炉衬结构如下:     

冷轧薄钢板St37连续退火工艺的开发

本文从分析冷轧厂连续退火的工艺特点,研究和开发了结构用冷轧薄钢板的St37连续退火新工艺,产品具有较好综合机械性能,显著提高了性能合格率,并扩大了冷轧生产品种。     

激光技术在焊机中的应用

在冷轧的生产中,为了保证机组的连续稳定生产,将相邻两卷带钢的头、尾经剪切机切头、切尾以后进行焊接,从而保证机组的连续生产是非常必要的,只有这样才能实现整条机组连续轧制。因此冷轧带钢焊机是冷轧厂各机组的重要设备。     

冷轧工作辊异常剥落分析及防范措施

介绍最近10支冷轧工作辊连续发生异常剥落的原因及调查分析,阐明冷轧工作辊剥落损坏发展规律及防范措施。     

冷轧钢板新的制造技术

川崎钢铁公司在大幅度扩大连续退火板材的适用范围的同时,这次研制出了用连续退火不进行时效处理,由同样成分的坯料分别制造各种深冲用冷轧钢板的工艺,这是一种具有划时代性的冷轧钢板制造技术。     

自主创新技术在不锈钢二十辊精密板材冷轧机组中的应用

结合某厂工程冷轧精密不锈钢板材850 mm二十辊可逆冷轧机组设备工程承包(EPC)项目成功案例,介绍了自主创新技术在国产不锈钢二十辊精密板材冷轧机组的成功应用,通过连续的自主创新,取得了良好的经济效益和社会效益.     

汽车用冷轧超低碳烘烤硬化钢板的组织性能与析出

实验研究了汽车用冷轧超低碳烘烤硬化钢板的成分、热轧冷轧及退火工艺对钢组织性能的影响规律,并分析了冷轧后连续退火和罩式退火不同条件下钢中析出第2相粒子形态和钢板的织构变化。     

Introduction to the special section on cognitive processes and psychotherapy.

Theoretical models featuring cognitive processes have played a fundamental role in advancing knowledge of psychopathology and its treatment and have emphasized the importance of cognition in psychotherapy. Recognition of the importance of cognition in psychotherapy has led to a number of questions that are addressed by the articles in this special section of the Journal of Consulting and Clinical Psychology. Cognitive therapy is well represented in the articles in this special section, but therapeutic procedures that do not represent typical cognitive therapy are also examined. The articles in this special section focus on homework in the modification of cognition, cognition in the treatment of anxiety in adults and in children, change in depressive cognitions in children, cognition and rapid change in the treatment of depression, and the role of cognition in the treatment and prevention of depression that is recurrent. Examination of these types of questions holds the possibility of advances in existing treatments and the possibility of innovations in new treatments. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

球团链箅机回转窑工艺中氯和硫元素迁移规律

摘要：对链箅机回转窑工艺中各段球团样品进行实验分析,研究了氯元素和硫元素在链箅机回转窑工艺中的迁移规律,明晰了烟气中HCl的生成机制。结果表明,球团原料中的氯元素主要是以NaCl的形式存在,氯元素有一部分在链箅机抽风干燥段会转变成HCl气体并进入烟气,一部分在链箅机预热Ⅱ段之后以NaCl的形式汽化进入烟气,剩余的氯元素仍以NaCl的形式存在于成品球团矿中。烟气中的HCl气体是在抽风干燥段,由富含SO2的烟气与含水球团料层中的NaCl发生反应生成的,烟气中SO2转变成Na2SO4重新固定于料层中。在预热Ⅰ段和预热Ⅱ段,烟气中的SO2与原料中碳酸钙分解生成的游离CaO反应生成CaSO4,也会重新固定烟气中的SO2。     

我国“十五”连铸技术发展方向及预测

概述了我国连铸生产10年来取得的主要成绩,分析了世界连铸生产发展的主要特征、我国“十五”期间连铸发展的特征及存在的差距,对连铸生产发展的重点问题提出看法。     

焦炭硫分影响因素分析

简要归纳了国内目前焦炭硫分预测方法,指出了不足。通过32个单种煤硫分形态与焦炭硫分关系研究,分析了硫分形态对焦炭硫分的影响;通过分析炼焦过程炼焦煤硫分变化,提出传统室式炼焦过程脱硫反应和固硫反应并存,煤气中H2具有脱硫功能,灰中CaO和MgO是固硫剂;60个样品试验数据的回归分析结果表明,煤的全硫和灰中(CaO+MgO)含量是影响焦炭硫分的主要因素。     

Discrete Element Modeling of Contact Creep and Aging in Sand

In this study, aging in dry, clean sand induced by contact creep is investigated through numerical simulations using the discrete element method. Simulation results demonstrate that contact creep initiates the redistribution of contact forces. Although contact creep produces a very small decrease in porosity (approximately 1.7%), a significant change in the contact force distribution is produced in the aged sample. The contact forces ultimately become more uniform in both magnitude and spatial distribution. This homogenization of contact forces leads to more stable force chains and therefore produces an increase in the small-strain stiffness, early strength, and dilatancy in the aged sample. Such increases are not found in the sample prepared to the same porosity as the aged sample but without aging. This is because, in generating this sample, the contact creep is not allowed and therefore its associated contact force distribution is less homogenized compared with that in the aged sample.     

某铀矿区水稻土—地表水铀含量对稻米铀含量的影响

以水稻土—地表水铀含量为视角,从水稻土剖面铀含量分布规律、水稻土与下伏岩体稀土元素特征、不同河流不同河段水稻土—地表水—稻米铀含量特征、水稻土与稻米铀含量关系4个方面研究721铀矿区稻米铀含量成因。结果表明,水稻土剖面铀含量从表层至半风化花岗质基岩层呈明显降低的特征,说明水稻土铀含量高的原因不是土壤母质铀含量高;岩石与水稻土稀土元素标准化模式均表现为向右倾斜型,均属轻稀土富集型,轻稀土分馏明显,表明水稻土为还原环境,吸附作用较强;不同河流不同河段水稻土—地表水—稻米铀含量平均值的特性均为上游最低、中游最高、下游次之。铀矿区地表水环境符合铀元素在水稻土中被平衡吸附的动力学条件,有利于铀元素在矿区内河流中游地区的水稻土中沉淀富集;正在采矿区水稻土与稻米铀含量具有高度的空间耦合性,呈指数正相关关系,相关系数0.749。矿区内河流沿岸稻米铀含量的分布特征是由铀元素的迁移途径决定的"采矿活动(铀尾矿露天堆放)→地表水→水稻土"。     

O. Chanute, C.E.

Octave Chanute was one of the leading civil engineers in the United States in the period between 1850 and 1890. His work on eastern and western railroads was unsurpassed. He began his bridge building career in 1856 and designed his last major bridge in 1888. Starting in 1890, he began his study in the work that others conducted in the area of manned flight and designed and tested many of his own gliders. He later assisted the Wright Brothers in their experiments in Dayton and at Kitty Hawk.     

Cohesive Sediment Characterization by Combined Sedimentation and Rheological Measurements

A laboratory characterization of cohesive sediment has been carried out in which data obtained from standard sedimentation and rheological measurements were combined in a determination of the critical solid concentration for the detection of elasticity in a weakly cohesive suspension. The corresponding storage modulus and shear stress are very critical in any in situ rheometry of sediments, especially in the study of mud-water surface erosion in a flume. Sedimentation results showed that particle size distribution rather than surface treatment controlled the rheological behavior of the suspension while the critical solid concentration for the appearance of three-dimensional space-filling network, showing some measurable elasticity in the suspension, occurred in the region of 0.015. This parallel between the consolidation behavior and shear rheology development for the flocculating system has been established. This technique could be an adjunct to the laboratory characterization of cohesive sediments for the estimation of critical shear stress for surface erosion, especially in a typical flume experiment under water wave pressure.     

转炉双渣操作炉渣中磷微区分布规律

对转炉双渣操作时的前期渣和终点渣中微观区域里磷的微观富集规律进行了研究,发现微区碱度Rm为2.0～2.5的微区中磷的富集程度最高;前期渣和终点渣中钙质量分数分别为16%～20%、33%～37%的微区中磷质量分数较高;微区磷富集与硅质量分数关系密切,终点渣微区中硅质量分数为9%～12%、前期渣微区中硅质量分数为13%～14%时,磷质量分数最高;微区铁质量分数对磷富集的影响明确,铁质量分数为5%～9%时磷质量分数最大;镁质量分数低的微区中磷质量分数较高。     

Impaired control of visual attention in schizophrenia.

To investigate attentional impairment in schizophrenia, the authors examined the performance of 22 patients with schizophrenia and 16 healthy control subjects in 4 visual search tasks that varied in perceptual requirements and in the need for precise attentional control. The rate of search was slowed in the patients in all tasks. However, the degree of slowing was largest in tasks requiring precise attentional control and smallest in tasks that were perceptually difficult but required less attentional control. This pattern of results indicates that the primary impairment of attention in schizophrenia lies in the control of attention and not in the selection processes that operate once attention has been directed to an object. (PsycINFO Database Record (c) 2010 APA, all rights reserved)