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In this paper, with an original designed tool and selected welding parameters, 2024-T4 aluminum alloy sheets were friction stir welded successfully. A series of weld experiments were performed; the microstructure and the mechanical properties of the joints were analyzed. The influences of the welding parameters upon the quality of the joints were studied. The optimized welding parameters window was obtained in which high quality joints can be made and the tensile strength of the optimized joints were more than 80% of that of parent metal. The residual stresses of FSW joints have been investigated by using the Hole-drilling method.

本文自主设计搅拌头,通过选择合适的工艺参数,成功实现了硬铝合金2024-T4板材搅拌摩擦焊接;通过对接头成形和微观组织的研究得到可以实现焊接的工艺参数范围和工艺参数对接头成形的影响规律,并结合接头力学性能研究形成了接头性能与工艺参数之间的关系,并据此建立了优化工艺参数窗口,优化工艺参数下接头的抗拉强度可达到母材的80%以上。

The present situation of application and study of master alloy refiners in aluminum alloys was reviewed in this paper.

综述了中间合金细化剂对铝合金晶粒细化处理的研究与应用现状。

Product's design is unusually, it has good material, easy to install, use, transport and store, so it is used in exhibition, shows, celebration meeting, sport and performance, racing port and travel outdoor etc. This products has been sold in domestic and oreign countrys, all circles user like liri tents very much, serve many famous rands continu ously.

主导产品有折叠式快捷活动帐篷和各类铝合金组合式帐篷,产品因设计造型新颖独特、选材精良,安装使用、运输贮藏简便,而广泛应用于展览展销、庆典集会、体育娱乐、赛车运动、旅游休闲、流动摊档等户外临时活动。

Is a professional manufacturing and research and development in science and technology enterprises metal pipe, aluminum alloy Institute ad hoc company.

宿迁畅想金属制品有限公司是专业生产制造和研究开发金属管的科技型企业,公司内特设铝合金研究所。

The main production of composite gypsum ceiling, gypsum board waterproof CaSi and environment-friendly calcium silicate board, ordinary type dampproof keel plate and aluminum alloy, galvanized paint keel, light steel keel and Hardware accessories products.

主要生产复合石膏天花板、石膏防水硅钙板、环保型硅钙板、普通型防潮板及铝合金龙骨、镀锌烤漆龙骨、轻钢龙骨及五金配件系列产品。

Since its establishment,the comany has spared no dfforts in the development of environment-friedly green products and upgrading the technological contents in the products.By now,it has developed the four series of products of DM high-strength water and fire proof inorganic ceiling;DMpaper-fibre free gypsum board and DM dldctrostatic spray alun\minium alloy board and keel plate,with nearly a hundred varieties.Moreover,it accepts orders from clients to produce various boards to meet their special requirements.Its products serve as idela interior decoration manterials.

自兴业以来,公司致力于绿色环保产品的研制和开发,不遗余力地提升产品的科技含量,目前已形成 DM 高强防水、防火硅钙天花板; DM 高强防水、防火无机天花板; DM 铝幕墙板; DM 静电喷塑铝合金板及龙骨四大系列产品,近百个花色品种,并可根据用户需求生产各种类型板材,是理想的室内装饰材料。

Our company wholesale and retail light steel keel, TK paint keel plate embossed gypsum board Mount Tai Lafarge gypsum board gypsum board mineral wool board Messiah Armstrong licensing plasterboard aluminum grille aluminum alloy keel°long shelf°Color color steel sandwich panel structures, such as severed Canopy Decoration Materials.

本公司批发零售轻钢龙骨、烤漆龙骨TK板压花石膏板泰山石膏板拉法基石膏板阿姆斯壮矿棉板赛亚牌石膏板铝合金龙骨铝扣板铝隔栅长条扣板彩钢棚彩钢夹心板隔断雨棚搭建等装饰材料。

Our company wholesale and retail light steel keel, TK paint keel plate embossed gypsum board Mount Tai Lafarge plasterboard plasterboard Armstrong mineral wool board mineral wool board Messiah long licensing licensing gypsum board keel°alloy aluminum grille bar Color Color°shed off the sandwich board decorative materials such as Canopy structures.

本公司批发零售轻钢龙骨、烤漆龙骨 TK板压花石膏板泰山石膏板拉法基石膏板阿姆斯壮矿棉板龙牌矿棉板赛亚牌石膏板铝合金龙骨铝扣板铝隔栅长条扣板彩钢棚彩钢夹心板隔断雨棚搭建等装饰材料。

Aluminum alloy worktable, has profiles framework, the above has units plate,two sides and back having hoarding,in frontof the framework,there are doors, drawers, etc., the side of the profiles, along the profiles' direction have trough-shaped cross section, the framework of the vertical connections between profiles useful screw connected straight dihedral angle-shaped corner connector and square plate-shaped nut.

优点advantages;铝合金工作台,有型材框架,框架的上面有台板,两侧和背面可有围板,框架前面有柜门、抽屉等,型材的侧面上、沿型材长度方向有内腔横截面是工字型槽,框架垂直连接的型材间有用螺钉相连的直二面角形的弯角连接件和方板形螺母。

The sophisticated design of cast aluminum head, plus sophisticated hardware-oriented slider track rod, lifting devices.

设计精巧的铸铝合金机头,精密加硬圆棒轨道滑块导向,升降装置。

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Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势,并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。

This dramatic range, steeper than the Himalayas, is the upturned rim of the eastern edge of Tibet, a plateau that has risen to 5 km in response to the slow but un stoppable collision of India with Asia that began about 55 million years ago and which continues unabated today.

这一引人注目的地域范围,比喜马拉雅山更加陡峭,是处于西藏东部边缘的朝上翻的边框地带。响应启始于约5500万年前的、缓慢的但却不可阻挡的印度与亚洲地壳板块碰撞,高原已上升至五千米,这种碰撞持续至今,毫无衰退。