无横梁高刚性轧机的结构分析

本文介绍了无横梁高刚性轧机的新颖结构，分析了该轧机高刚性及轴承长寿的原理。该轧机在现场使用中，取得了良好的效果。     

平—立可换轧的研制

本文开发出了国内第一套平－立可换轧机，并对该轧机的结构性能特点和使用情况作了阐述说明。     

平─立可换轧机的研制

本文开发出了国内第一套平─立可换轧机，并对该轧机的结构性能特点和使用情况作了阐述说明。     

2100mm热粗轧机侧导尺液压系统伺服控制改造

2100mm热粗轧机在调试过程中侧导尺震动大，功能不完善。结合北线3950mm热粗轧机的使用情况，分别就两台轧机侧导尺的使用、功能、设备结构及控制原理进行分析，对比两台轧机侧导尺的工作原理及设备配置，找出了2100mm热粗轧机侧导尺出现问题的原因，并根据现场的实际情况确定解决方案。通过改造处理后，现2100mm热粗轧机侧导尺工作正常，功能满足生产、调试需要，保证后续设备的调试验收。     

六辊轧机结构型式的新发展

叙述了六辊轧机(HC轧机)结构型式的新发展及其在各国的使用情况,同时指出了设计这种轧机应注意的问题及主要参数的确定方法。1六辊轧机的新发展及使用情况 HC轧机即通常所说的六辊轧机,是日本口立公司于1972年研制的。     

带肋钢筋的4线切分轧制技术

德国巴登钢铁公司(BSW)使用自行改造的预应力轧机，进行带肋钢筋的4线切分轧制。介绍该技术的孔型系统、轧辊结构、导卫结构、轧制控制以及对轧机的要求。     

四辊冷轧机减振装置的研究

对３００ｍｍ四辊冷轧机工作辊弯辊新结构和板厚板形综合调节新机构减振性能的实验表明，当工作辊弯辊缸和板厚板形综合调节机构工作时，轧机垂直振动幅值有较大幅度的降低。为适应不同结构轧机减振需要和填补国内冷轧机干摩擦阻尼减振装置研究的空白，又研制了结构简单、加工制造容易的新型干摩擦阻尼减振装置。该装置有良好的减振性能，宜在生产轧机减振时使用。     

5l82铝合金的铸轧研究

传统双辊铸轧机生产铝合金带材效率低下。目前，已经研究出使用两种高速铸轧机——双辊异径铸轧机（UDTRC）和立式高速双辊铸轧机（VHSTRC），并配合无需润滑的低碳钢辊套生产5182铝合金带材，生产速度明显提高，且不粘辊。另外，通过对5182铝带的表面状态、微观结构和抗弯能力的研究发现，VHSTRC优于UDTRC。     

高刚度轧机的实践与探索

通过对几种轧机型式的分析，讨论了提高轧机精度与轧机刚度的关系，并进而讨论了提高轧机刚度的途径，结合本厂使用短应力线无牌坊高刚度轧机的实践，证明了此类轧机是合适的新机型，它可以大大提高轧制成品的精度，介绍了国内外此类轧机的发展与应用，并展望了此类轧机必应用于今后的连轧机组。     

高线粗中轧轧机选型优化及主减速机改型设计

通过对比分析国内高线粗中轧轧机的工作特点，优化了轧机的选型，通过国内粗中轧主减速机使用工况的考察，完善了主减速机的结构及重要参数，不仅为安钢高线粗中轧主机列的可靠运行奠定了基础，而且为轧钢工艺水平的进一步发挥创造了条件。     

预应力在大剧院工程中的应用

大剧院工程由于结构设计平面尺寸超长,结构楼层高低错落,体型多变,不宜设置结构缝;另外建筑结构设计空间大,设置了多层看台,中间设有超大升降舞台及乐池,导致结构本身自重大,跨度大,体积大,这就要求控制施工、使用阶段出现结构裂缝,因此在结构设计中采用了无粘结预应力及有粘结预应力技术,以改善钢筋混凝土结构的综合性能、承载能力及控制结构裂缝。     

某主厂房天面裂缝原因及防治措施

由变形变化引起的裂缝即主要由温度收缩变化产生应力引起的裂缝,在结构设计中,为防止这样收缩引起的破裂,可以采取“放”的办法,给结构留有自由变形的余地,或者采取“抗”的方法,限制变形,以强度抵抗最大应力．根据经验,宜采取“抗放兼施,以放为主”的作法较为经济可靠。     

板坯连铸水口内钢液流动的数值模拟

 运用CFX计算软件研究了大通钢量工况下板坯浸入式水口流场,分析了水口结构、结晶器流动控制方式、水口吹氩等对浸入式水口流场的影响。研究表明,适宜的水口结构和控流方式组合能获得最优的水口出口流股形态和稳定均衡的流场。在大通钢量下,塞棒、底部凸起水口结构是最佳组合。不适宜的工艺组合形成并加重水口偏流,造成结晶器初始坯壳的不均匀冲刷和液面涡流,进一步诱发水口堵塞、水口结瘤、结晶器非稳态和不均衡传热,最终导致铸坯缺陷甚至诱发拉漏事故。     

Structure of the attachment of the vocal ligament to the perichondrium of the thyroid cartilage

The ventral attachement of the ligamentum vocale of eleven larynges (new-born and adults has been studied in sagittal, frontal and horizontal sections. 1. Supplementary to the known structure of the ventral attachement of the ligamentum vocale we have noticed collagen fibers which ascend in the inner angle of the thyroid cartilage and which partly cross to the other side. Sometimes a few fibers which are running downward have been observed. This structure of the attachement must be more firm than the known structure. 2. Moreover it has been observed that a lot of the angles of the crossing collagen fibers in the cartilage of the lamina mediana (near the attachement of the ligamentum vocale) are right-angled, whereas the angles of the fibers which lie in the laminae laterales in their majority are acute-angled. This phenomenon also is interpreted as a structure which makes the lamina mediana firmer. The fact, that this structure is not so evident in the specimens of the new-born as in those of the adults indicates that there are postnatal changes in the structure of the lamina mediana.     

城市化进程中的小城镇交通初探

通过对小城镇城市结构、路网结构、交通结构和交通管理特征进行详细分析，得出小城镇交通问题症结所在，并初步提出小城镇交通规划和交通治理的对策。     

高碱度烧结矿矿相结构分布模式及形成机理

基于烧结矿的非均性, 发现了矿相结构的三种分布模式, 并对矿相结构的形成机理进行了阐述.首先, 基于烧结矿的手标本鉴定特征把某钢厂烧结矿划分成了三类.其次, 对矿相结构的鉴定发现, 第1类、第2类、第3类这三类烧结矿的矿相结构在空间上依次具有"均一状、同心环状、互嵌状"三种分布模式.均一状分布的矿相结构形成于温度较高、还原性较强和混料均匀的稳定条件之中, 主要为交织熔蚀-熔蚀结构, 具有良好的冶金性能; 同心环状分布的矿相结构从外部带到内部带依次为交织熔蚀结构、熔蚀结构和赤铁矿粒状结构, 多以独立单元的形式出现, 其所在区域工艺条件的恶化并不会对烧结矿总体的结构和冶金性能造成太大影响; 交织熔蚀结构、赤铁矿粒状结构和铁酸钙聚集区交叉形成的互嵌状矿相结构, 多形成于温度较低、气流不稳定和混料不均匀的条件之中, 易成片出现而导致烧结矿结构和冶金性能的恶化.最后, 冶金性能分析显示, 第1、2类烧结矿各项冶金性能指标良好, 具有互嵌状分布模式的第3类烧结矿由于矿相结构的不均匀, 冶金性能相对较差.结果表明, 这种基于矿相结构分布模式的研究方式, 有利于对矿相结构形成机理的阐述, 更助于对烧结原料、烧结气氛等工艺条件的调控, 对烧结矿冶金性能的改善具有一定理论价值.      

Structural Morphologies and Deformaiton Characteristics of Semi‐solid Type 304 Stainless Steel during Solidificaiton and Remelting

Microstructural evolutions of type 304 stainless steel and the related mechanical property of flow stress in semi‐solid state are investigated. The evolutions of microstructure during solidification, partial remelting of a hot‐rolled billet and partial remelting of a cast billet are compared with respect to structural morphologies in the semi‐solid state. Various structural morphologies, such as the linear and multilayered liquid/austenite/δ‐ferrite structure, globular liquid/δ‐ferrite structure and dendrite structure, are characterized using optical micrographs and an EPMA (electron probe microanalyzer). The various structural morphologies in the semi‐solid state are influenced not only by the phase transformation but also by the previous treatment of type 304 steel, such as hot rolling and casting. Furthermore, a series of hot compression tests are conducted for various combinations of deformation rate and deformation temperature in the semi‐solid state, to measure the flow stress and the change in microstructure resulting from plastic deformation. Flow stress, phase segregation, microfracture and distortion of solid particles during and after the hot compression test are strongly affected by the structural morphology in the semi‐solid state, such as the dendrite structure, nonglobular structure and globular structure. Semi‐solid type 304 stainless steel with dendrite structure exhibits the highest flow stress, which is about three times that of steel with globular structure, although the testing temperature and deformation rate are controlled to be the same. This is a result of the higher bonding force between solid particles and lower fluidity of the liquid phase of the dendrite structure than those of the globular structure, which exhibits excellent fluidity of the liquid phase and rotation of solid particles.     

黑龙江桦南二伐区金矿床地质特征与成因探讨

断裂构造主要有两组, 北西向断裂为基底构造继承和改造的产物。北西向断裂是本区主要的导岩、导矿构造, 浸染状金矿石为主要的矿石类型, 约占矿石总量的60%, 呈他形粒状、浸染构造, 金属矿物含量约占5% ~ 15%, 主要金属矿物为黄铁矿, 次为毒砂、方铅矿等。     

Geometric Modeling of Inflatable Structures for Lunar Base

A modular inflatable structure consisting of thin, composite membranes is presented for use in a lunar base. Results from a linear elastic analysis of the structure indicate that it is feasible in the lunar environment. Further analysis requires solving nonlinear equations and accurately specifying the geometries of the structural members. A computerized geometric modeling technique, using bicubic Bezier surfaces to generate the geometries of the inflatable structure, was conducted. Simulated results are used to create three‐dimensional wire frames and solid renderings of the individual components of the inflatable structure. The component geometries are connected into modules, which are then assembled based upon the desired architecture of the structure.     

略论江西有色金属产业结构调整与升级

从产业布局、产品结构、技术结构和组织结构等方面对江西有色金属产业结构进行了分析,在此基础上提出了江西有色金属产业结构调整升级的思路和建议。