■用技术‘ 体组织。试验参数条件下,新型高强铝合金合适的 应变速率应取在0.01~0.1 S 范围。 3)实验参数范围内,当压缩变形程度大于 [2】Mcqueen H J,Blum W.Dynamic recovery suflifcient mech— amsm in the hot deformaiton ofA1(<99.99)卟Mterials Sci— ence and Engineering,2000(290):95—107. 40%,新型高强铝合金原始铸态组织基本转变为均 匀的锻态组织。 参考文献: [3】林高用,彭大暑,魏圣明,等.强化固溶处理对7075铝合金 组织的影响U】.金属热处理,2002,27(11):30—32. 『4】杨智春,李斌,马光来.7075高强度铝合金锻造晶粒细化 【1】 王涛,尹志民.高强变形铝合金的研究现状和发展趋势卟 原理的数值仿真研究卟稀有金属材料与工程,2006,35(4): 642—646. (责任编辑高腾) 稀有金属,2006,30(2):197—202. The Influence of Hot Deformation Parameters on Microstructure Evolution of High Strength Aluminum Alloy with As-cast Starting Structures Wang Peng,Li Ping,Liu Jing-bin,Hao Wen-ling,Fan Hao,Wang Bai—zhou (School of Mechanical Engineering of Taiyuan University of Science and Technology,Taiynan 030024 China) Abstract:Hot compression tests of new A1・・Zn-Mg-Cu alloy with as—cast and as—forged starting structures are carry out by Gleeble-1500D thermo—mechanical simulator.The author analyzes the influence of hot deformation parameters on microstruc— ture evolution of the hilgh s ̄ength aluminum alloy with as・cast starting structure.The investigation indicate that as-cast den。 dritic grains elongate under the applied compression conditions,while interdendritic boundaries in as—cast coarse grains disap。 pear gradually due to difusion at higher temperatures,and transformed to uniform microstructure;Precipiates resoltved into matrix during hot deformation gradually;the uniorfm deformed microstructure can be obtained at proper hot deformation pa‘ rameters. Key words:high strength almiunum alloy;hot deformation;microstructure evolution (上接第79页) 架构架之间设有横向油压减振器,改善车辆横向稳 3结束语 定性。牵引装置采用中心销式牵引。用于传递转向 架与底架之间的牵引力,并使转向架能相对于车体 转动和横动。 5)电气系统采用发动机电子控制单元 (ECM)、微机换挡控制器、主补机及故障显示屏、 随着我国城市轨道交通的发展.城轨和地铁越 来越成为缓解城市交通压力、减少城市污染的主要 交通方式。TY600型内燃调车机车正是为适用这种 发展趋势而开发设计的,该车具有牵引力大、排放 性能优良等特点.可极大地满足我国城市轨道和地 铁调车及救援作业的需要。 参考文献: [1】鲍维千.内燃机车总体及走行部【M】.北京:中国铁道出版 社.2010:10. 司机控制器等。操纵方式提供自动换挡和手动换挡 两套操作模式。该车油门操作为电子油门。精度 高,调速平稳,另外配置一个手动油门,用于主油 门发生故障时使用。前后台设置风压表、显示屏和 故障报警灯,显示屏可显示发动机、变速箱的状态 参数,双机重联时也可显示补机状态,并可显示系 【2] 中华人民共和国铁道部编.铁路技术管理规程[s】.北京: 中国铁道出版社,2006:10—11. 统故障代码,便于掌握整车状态和分析故障原因。 (责任编辑高远) Design of Model TY600 Diesel Shunting Locomotive Zhu Jun-ya (Taiynan Railway Transportation Equipment Co.,Ltd,Talyuan 030009 Chia)n Abstract:Model TY600 Diesel Shunting Locomotive is mainly used on shunting and rescuing work on urban rail transporta- tion and subway.This paper is mainly introduce the main technical specification,part construction and its technical character— istics. Key words:diesel locomotive;shunting;technical speciifcation;construction characteristics