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). The previous studies are mainly focused on the composition optimization, the extrusion process, the quenching sensitivity and the wielding process in 6005A alloys [5,6, 10-14]. Very few research results... materials [3-5]. However, the quench sensitivity of 6005A aluminum alloys is high, thus aging treatment should be employed after on-line extrusion to achieve stable microstructure and mechanical properties......
extrusion temperatures 图9 挤压温度对6005A铝合金屈服强度和抗拉强度的影响 Fig. 9 Effect of welding temperature on yield strength and tensile strength of 6005A Al-alloys 3 结论 1) 在挤压温度为500~580 ℃时,随着挤压温度的升高,其平均晶粒... and grain size of original material 图5 不同挤压温度下焊合部位样品的EBSD晶粒形貌图 Fig. 5 EBSD images showing grain morphology of welding zone at different extrusion temperatures 图6 不同挤压温度下6005A铝合金的晶粒直径占......
; underground trains; coupled periodic FE-BE method; track types 1 Introduction There are more and more environmental concerns which are focused on the vibrations induced by underground railway... soil characteristics are summarized in Table 1. 3.2 Track characteristics At present, a lot of tracks are applied to underground railway engineering to mitigate vibrations induced by trains......
Cold extrusion deformation behavior of medium carbon steel after quenching and tempering HU Cheng-liang(胡成亮)1, ZHAO Zhen(赵 震)1, YIN Guan-ren(尹冠人)1, YUAN Zhao-feng(袁兆峰)2, XU Xiang...; Abstract: By taking 40Cr as a specific object, cold extrusion deformation behavior of medium carbon steel after quenching and tempering was studied by experimental works. The influence......
. Therefore, in on-line extrusion, water spray quench and moderate temperature should be taken to enhance quench rate, then 6005A alloy can be quench hardened and its quenching distortion can be reduced 关键词...Heat Treatment of Modified 6005A Alloy for Vehicles GUO Ming-Xing1,WANG Ming-Pu1,LI Zhou1,CAO Ling-fei1 (1.School of Materials Science and Engineering, Central South University, Changsha 410083......
文章编号:1004-0609(2012)08-2174-07 人工时效对6005A铝合金晶间腐蚀性能的影响 盛晓菲1,杨文超1,汪明朴1, 2,李 周1,龚 静1,彭 诚1 (1. 中南大学 材料科学与工程学院,长沙 410083; 2. 中南大学 教育部有色金属材料科学与工程实验室,长沙 410083) 摘 要:采用硬度测试,晶间腐蚀试验,金相及透射电镜观察研究人工时效对6005A铝合金晶间腐蚀性能的影响.结果表明:6005A铝合金在固溶水淬后进行人工时效,晶间腐蚀敏感性随时效时间的延长而变化;时效初期,合金的晶间腐蚀敏感性很低,随时效时间的延长,晶间腐蚀敏感性增加;时效12 h时,合金硬度达峰值,同时晶间腐蚀敏感性也达最大,随后晶间腐蚀敏感性减弱,出现点蚀.6005A铝合金晶间腐蚀敏感性与晶界有关,点蚀的引入与晶内Q′相的析......
technology of railway vehicles, which has important practical significance for the train operation safety. Since the 1990s, a number of projects including safe-trains, safe-trams, train-safety and safe... trains, which has a wide range of applications. Thin-walled tube is one common kind of energy-absorption structure used in railway vehicles, which usually includes two main types: circular tube......