DOC《哈尔滨工业大学第十二届》

铝钢搭接结构;

搅拌摩擦焊;

异种金属 A New Method of Friction Stir Welding in Aluminium and Steel Lap Structure Parts Yaobin Wang1,Tifang Huang1,Huajian Li1,Zongliang Lv2,Yi Ke2 1(Welding Technology and Engineering,2011,School of Materials Science and Engineering, Harbin Institute of Technology) 2(Welding Technology and Engineering,2010,School of Materials Science and Engineering, Harbin Institute of Technology) Abstract:In traditional friction stir welding steel with aluminum, the intermetallic compound of Al-Fe will appeared, which would decrease the tenacity, increase the hardness, and lead to a bad joint performance. Through the optimization of welding parameters,we found the best friction stir welding process parameters of 3mm thick 6082-T6 aluminum alloy sheet and 2mm thick QSTE340TM hot rolled structural steel lap joint structure and designed a kind of welding tool which could increase the area of Al-Fe bonding in friction stir welding. For friction stir welding of aluminum and steel lap joint structure using this tool and the optimization of welding process parameters, it obtained good welding seam formation and the joint tensile shear load was higher than 43% that of ordinary welding tool, realized the high quality connection of aluminum steel lap joint structure. Key words:Al-Fe brittle intermetallic compound;

aluminium and steel lap joint structure;

friction stir weld;

dissimilar metal 2. 南水北调干渠的水污染应急处理策略的研究 刘思琦1, 王琳琪1, 梁柱元2, 杨宇3, 杨柏楠4 1.哈尔滨工业大学市政学院12级建筑环境与设备工程 2.哈尔滨工业大学市政学院12级环境工程 3.哈尔滨工业大学市政学院12级给排水专业 4.哈尔滨工业大学经管学院12级会计 摘要:南水北调工程的成败在于其水质,而人工输水渠道往往会穿越较多的桥梁、公路,渠道沿程也会分布一些污染源,因此就避免不了发生一些突发污染事件.针对这一现状,我们选取已经竣工的中线输水渠道中的一段作为研究对象,对其周边污染源以及可能造成突发污染事故的因素进行了调查,再通过对渠道的实况模拟并综合管理学知识,获得较有针对性和实用性的污染应急策略. 关键词:南水北调中线工程;

突发水污染;

SMS软件;

水质模拟;

应急处理策略 The Study on the Emergency Processing Strategies of Water Contamination Occurred in the Trunk Canal of the South-to-North Water Diversion Project Liu Siqi1,Wang Linqi1,Liang Zhuyuan2,Yang Yu3,Yang Bainan4 1. Building Environment and Equipment Engineering, Harbin Institute of Technology;

2. Environment Engineering, Harbin Institute of Technology;

3. Water Supply and Drainage, Harbin Institute of Technology ;

4.Accounting, Harbin Institute of Technology Abstract: Whether the South-to-North Water Diversion Project depends on the quality of transferred water. Artificial water channels tend to go across lots of bridges and highways. What cannot be ignored are the sources of pollution lying alongside. So, theoretically, sudden environmental pollution accidents are unavoidable. According to the circumstance, we picked up part of the middle line of the South-to-North Water Diversion Project which had already finished as the target of the study. We researched many pollution sources around the channel and various factors which are likely to contaminate the environment. After that, we got the emergency processing strategies with pertinence and practicability by simulating the true occasion of the channel operation and utilizing the professional knowledge of statistics. Key Words: the middle line of the South-to-North Water Diversion Project;