Effect of Cold Rolling Ratio and Heating Rate of Batch Annealing on Textures of Micro-Carbon Steel Sheet

在四辊冷轧试验机和Gleeble-1500试验机上进行了热轧微碳钢板的冷轧和退火试验。用D/max-RC衍射仪测量了试样的,/”层织构,并用Roe软件进行了ODF分析。研究表明,所研究的热轧微碳深冲板压下率约为75%,退火升温速度为20-40℃/h时,试样为{111}织构特征；压下率较大(80%)时,退火织构为较弱的{111}组分。无论{111}织构还是非{111}织构都是在形核阶段开始形成,在晶粒长大优先长大,受到定向形核和选择生长双重机制的作用。

Analysis of asymmetrical cold rolling with varying coefficients of friction

In this research, asymmetrical cold rolling was produced by the difference in the coefficient of friction between rolls and sheets rather than the difference of roll radius or rotation speeds. The influence of friction coefficient ratio on the cross shear deformation, rolling pressure and torque was investigated using slab analysis. The results showed that the shear deformation zone length increased with the increase of the friction coefficient ratio. The rolling force decreased only under the condition that the friction coefficient ratio increased while the sum of the friction coefficients was held constant. As the reduction per pass was increased, the shear deformation zone length increased and the rolling force also increased. An increase of the front tension resulted in a decrease of the shear deformation zone length. An increase of back tension, however, led to an increase of the shear deformation zone length. The reduction of rolling torque for the work roll with higher surface roughness was greater than that for the work roll with lower surface roughness. (C) 2002 Elsevier Science B.V. All rights reserved.

第一届Batchelor奖获得者Howard Stone教授研究工作简评

Batchelor流体力学奖和Hill固体力学奖是国际理论与应用力学联合会(IUTAM)设立的两个奖项,旨在表彰获奖者过去十年内在其力学分支学科研究中所做出的重要贡献.Batchelor流体力学奖和Hill固体力学奖每4年评选一次,在第22届国际理论与应用力学大会(8月24～29日,澳大利亚阿德莱德)上第一次颁奖.Howard Stone教授和Michael Ortiz教授分别是Batchelor奖和Hill奖的获奖人.本刊在《简评》栏目刊登胡国庆研究员和黎波教授对两位获奖者成果的简评,并在《译文》栏目刊登两位教授的代表性论文的译文各一篇,以饷读者.

Stone bridge in Panama.

Leonard Carpenter Panama Canal Collection. Photographs: Views of Panama and the Canal. [Box 1] from the Special Collections & Area Studies Department, George A. Smathers Libraries, University of Florida.

Alvará, porque Vossa Alteza Real he servido revogar toda a prohibição, que havia, de fabricas, e manufacturas no Estado do Brazil, e dominios ultramarinos, na forma acima exposta : para Vossa Alteza Real João Alvares de Miranda Varejão o fez

Apresenta o alvará de 12 de abril de 1808, do Príncipe Regente D. João, que revoga o Alvará de 5 de janeiro de 1785, de Maria I, que extinguia a manufatura de tecidos no Brasil.