中小铜管盘拉配模规程两种计算方法比较

通过两个实例，计算表明K计算法和径差法均是可行的；两者在Di和Si两组数列中，道次最大相对差异为2．52％。但前者计算简便，所需已知数据少，并且具有灵活性，能适应较为复杂多变的实际生产情况。所推荐的K计算法，也适用于编制板带材轧制压下规程。     

编制变形规程的K计算法(续1)

3 K计算法具体应用 3．1 板带压下规程的编制 基本公式是（5）和（6）,只要加下标即可,取：     

编制板带材压下规程的简易方法

用厚度减缩系数KH计算法编制有色金属板带材的压下规程。经12例的计算、对比，结果表明：KH计算法是可行的，运算操作简便。     

基于EXCEL的铝板带热轧规程优化设计

介绍了铝合金板带轧制压下规程的重要意义,以及轧制规程制定和优化设计的主要方法,根据铝合金热轧过程控制特点,选用恰当的轧制参数数学模型,依据轧制规程优化设计的要求,确定了目标函数数学模型和约束条件,借助于EXCEL规划求解功能进行了轧制规程的优化设计,通过计算实例对其应用效果进行了分析.     

用KD计算法设计棒线材拉拔配模规程

KD计算法是KD－KS计算法在编制棒、线材拉拔配模规程中的应用，它完全可以取代现有的几种计算法。该法计算依据较为合理，运算操作简便。     

无孔型轧制压下规程制定方法的实验研究

设计了无孔型轧制压下规程的制定方法,据此编制程序计算制定了铅及钢轧件多道次无孔型轧制模拟实验压下规程,实验中成功地实现了ＲＥＲ 轧法,并对无孔型轧制的大压下率特点进行了分析     

用KH计算法编制铜板带压下规程

提出了编制铜板带压下规程的KH计算法,经过热轧4例和冷轧6例的计算对比,结果表明:KH计算法是可行的,可为今后优化压下规程创造条件,并将产生经济效益。     

冷轧窄带钢节能压下规程的优化设计

介绍了动态规划法优化压下规程建立的数学模型，得出了冷轧窄带钢轧制能耗最小的压下规程，并对现场采用的压下规程进行了分析和比较。     

目标厚度函数法在板带轧制规程计算中的应用

板带轧制过程控制要求快速计算出满足指定目标负荷分配比的轧制规程,针对常用的Newton迭代法对厚度迭代初始值限制较多,不能确保迭代收敛的特点,提出目标厚度函数法.该方法建立轧制出口厚度对于轧制负荷的函数方程,通过求解一系列非线性方程得到满足目标负荷分配比的轧制规程,摆脱了厚度初始值的提供和Jacobi矩阵的计算.分别基于2种方法编制程序并采用实际数据计算,结果表明:目标厚度函数法在计算时间和收敛性方面均满足在线应用的要求,可成功取代Newton迭代法.     

500mm热连轧机组离线压下规程优化设计

根据莱纲500mm热连轧机组的具体情况。采用动态规划法和二分法相结合,开发了离线压下规程优化软件。建立轧制压力、变形抗力、温降、宽展等数学模型。软件采用VB6．0的编辑环境编制了Windows应用程序。其界面友好。易于操作。具有直观和形牡化的特点,而且便于对轧制参数进行修改。通过在离线条件下的压下优化设计计算。可以合理利用轧机能力。降低能耗：对轧制过程进行预设定。从而减少产品规格变化较多时和开发新产品时的试轧次数。以此节约成本,提高成材率。     

中厚板生产计划与精整设备匹配的研究与实践

中厚板厂目前以小批量、多品种、多规格、四切边为主,随着现代化设备的应用,产品质量得到很大提高.目前仍然存在的问题是合同交货期不能达到客户要求.文章对邯郸钢铁公司中板生产线在生产中计划与设备间存在的问题进行了分析,提出了改进意见,对改进后的效果进行了评价.     

《钢铁行业蓄热式燃烧技术规范》标准问题探讨

通过对制定《钢铁行业蓄热式燃烧技术规范》行业标准过程中几个关键问题的分析与探讨,明确该技术的准入条件与技术指标,介绍该技术的适用条件与应用形式,以及对于关键材料与设备的选择和系统的合理设计。并希望在正确理解该标准内容的基础上,帮助使用单位解决生产建设中遇到的技术问题,充分发挥蓄热式燃烧技术的节能和环保效益。     

Deformation processing

A generalized deformation processing system is defined in terms of a few basic physical parts and associated problem areas. Their nature and interactions are then discussed in relation to the problems of getting more out of old systems, developing new systems, and making better use of deformation processing for structure and property control.     

Deformation Structures of Pure Titanium during Shear Deformation

The deformation microstructure of commercial pure (CP) titanium formed in the theoretical shear zone of an equal channel angular pressing (ECAP) die during 3 or 4 passes is investigated by electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). The typical feature of the microstructure is that ultrafine grains coexist with coarse elongated grains with a high density of low-angle grain boundaries (LAGBs). Dislocation tangle zones (DTZs), dislocation cells (DCs), and subgrains are generated during shear deformation. The primary twin type has been found to be { 10[`1]2 }. \left\{ {10\bar{1}2} \right\}. Grain refinement appears to progress by continuous dynamic recrystallization (CDRX), in which dislocation movement to LAGBs leads to their evolution into high-angle grain boundaries (HAGBs).     

钢管企业特殊合同评审管理系统的设计与实现

为了使钢管企业特殊合同实现在线评审,建立产品规范和冶金规范,参照实际评审实例,分析了接单时技术、交期、价格以及商务等环节的评审要点,设计了特殊合同网上在线评审系统。该系统运行稳定,评审流程达到了设计要求,提高了评审工作效率,能够快速、准确地回应客户需求,实现了特殊合同评审业务的科学化和规范化。     

全尾砂膏体充填技术规范制定研究

针对全尾砂膏体充填技术标准现状,提出了全尾砂膏体充填技术规范制定的原则、技术路线和标准构架,阐述了标准制定的要点问题。标准符合充填采矿和尾砂充填资源化利用产业技术需求,能够有效支撑绿色矿山建设发展。     

Deformation of pearlite

Pearlite with its lamellae oriented mainly parallel to the longitudinal direction was prepared by Bolling's method of transformation in a steep temperature gradient. The Fe-0.7 pct Mn-0.9 pct C pearlite was drawn into wire and also into strip in dies designed to minimize macroscopically nonuniform deformation. Cross sections of the drawn wires and strip were examined by conventional and high-voltage transmission electron microscopy and were analyzed by quantitative metallography for a) average interlamellar spacing, b) distribution of interlamellar spacings, and c) orientation relationship between the cementite lamellae and the slip systems in the ferrite. The strength of pearlite is proportional to the reciprocal square root of the average interlamellar spacing, and the proportionality constant analogous to the Hall-Petch constant (k) is related to the strength of the cementite lamellae. If the stress for the propagation of slip through the cementite is assumed constant, a Hall-Petch type of equation can be derived for the strengthening of the pearlite against slip in the ferrite by piled-up groups of dislocations. Evidence for the plastic deformability of cementite is presented; sufficiently thin cementite plates were fully plastic. The exponential strain hardening of drawn pearlitic wires and of rolled pearlite is explained in terms of locally inhomogenous deformation revealed by the lack of fragmentation of the lamellae. This paper is based on a presentation made at a symposium on “Mechanical-Thermal Processing and Dislocation Substructure Strengthening,” held at the Annual Meeting in Las Vegas, Nevada, on February 23, 1976, under the sponsorship of the TMS/IMD Heat Treating Committee.     

Influence of Electroplastic Deformation on the Deformation Resistance of Refractory Metals

Metallurgist - Based on the analysis of theoretical and experimental studies, this article proposes that rolling (or flattening) while passing a high-density electric current through a deformation...     

宝钢炼钢和连铸管控一体化(上)

介绍了宝山钢铁股份有限公司炼钢和连铸管控一体化的实现及在实践中遇到的问题和解决的办法。由于炼钢和连铸单元现场条件恶劣、设备故障多、物流复杂,在实现管控一体化中难点较多,必须对这些难点进行分析研究,找出对策才能使过程控制与管理上下贯通。     

摩擦系数不等的非对称轧制条件下变形区内的变形分析

采用三维大变形热一力耦合有限元法分析了摩擦系数不等的非对称热轧板带变形区内轧件的变形情况，得到了不同摩擦系数条件下变形区内应力、应变和应变能量密度的分布规律。结果表明：在摩擦系数比不同的非对称轧制条件下，会产生不同于普通压缩变形的附加剪切变形，而且这种附加剪切变形为组织细化提供了有利条件。