共查询到20条相似文献,搜索用时 62 毫秒
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提出了双面搅拌摩擦焊这种新的焊接方法,对比研究了6K32-T4铝合金搅拌摩擦焊与双面搅拌摩擦焊接头的组织和硬度,并对双面搅拌摩擦焊焊缝进行了XRD分析。研究发现:铝合金双面搅拌摩擦焊与搅拌摩擦焊焊缝组织分区相同;双面搅拌摩擦焊焊缝的硬度略低于搅拌摩擦焊,且焊缝硬度下降区域范围更大;双面搅拌摩擦焊后焊缝依然保持为原有相组成;双面搅拌摩擦焊比搅拌摩擦焊焊接线能量更大,采用双面搅拌摩擦焊代替搅拌摩擦焊有利于提高焊接效率并消除焊缝隧道型缺陷、改善焊缝的性能。 相似文献
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The problems of the technology of friction stir welding (FSW) of new high-strength aluminium–titanium alloys V-1461 and V-1469 are discussed. The technical and economical advantages of the process are shown, the parameters are determined and the optimum FSW conditions resulting in high mechanical properties of the welded joint are proposed. 相似文献
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在铝合金传统搅拌摩擦点焊的基础上,以提高点焊接头力学性能为目标,提出"搅拌摩擦焊-交叉点焊"技术.其基本工艺原理是,搅拌头沿交叉轨迹做极短距离的往复式搅拌摩擦焊,以实现高性能的点焊连接.对4mm板厚5A02-H14铝合金进行"搅拌摩擦焊-交叉点焊"试验及分析.结果表明,该工艺可大大拓宽点焊接头的连接面积,并显著降低搭接界面畸变和匙孔处材料缺失的不利影响,与传统搅拌摩擦点焊相比,该工艺能够显著提高铝合金点焊接头的抗剪切性能. 相似文献
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Friction stir welding (FSW) is a solid-state welding process which is capable of joining materials which are relatively difficult to be welded by fusion welding process. Further, this process is highly energy-efficient and environmental-friendly as compared to the fusion welding. Despite several advantages of FSW over fusion welding, the thermal cycles involved in FSW cause softening in joints generally in heat-treatable aluminum alloys (AAs) due to the dissolution or coarsening of the strengthening precipitates leading to decrease in mechanical properties. Underwater friction stir welding (UFSW) can be a process of choice to overcome these limitations. This process is suitable for alloys that are sensitive to heating during the welding and is widely used for heat-treatable AAs. The purpose of this article is to provide comprehensive literature review on current status and development of UFSW and its importance in comparison to FSW with an aim to discuss and summarize different aspects of UFSW. Specific attention is given to basic principle including material flow, temperature generation, process parameters, microstructure and mechanical properties. From the review, it is concluded that UFSW is an improved method compared with FSW for improving joint strength. Academicians, researchers and practitioners would be benefitted from this article as it compiles significantly important knowledge pertaining to UFSW. 相似文献
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《Science & Technology of Welding & Joining》2013,18(4):330-336
AbstractIn this study, filling friction stir welding was used to remove the exit hole of friction stir welding lap joints made from AA5456 sheets. For this purpose, the exit holes were filled by consumable pins with various geometries and different pin applying methods. Then, the structures and mechanical properties of the resulting joints were investigated. Results showed that the strength of 7% higher than the strength of the joint with the non-filled exit hole, ~91% of the corresponding defect free joints, is obtainable with this technique. The best results were found by a pin with 11° cone angle, 8?mm diameter and 7?mm length, and with a 6?mm plunge without rotation. 相似文献
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铝合金LF6与工业纯铜T1的搅拌摩擦焊工艺 总被引:11,自引:0,他引:11
利用搅拌摩擦焊技术成功地焊接了防锈铝LF6和工业纯铜T1对接接头,研究了工艺参数对接头组织与性能的影响.结果表明:搅拌头旋转速度与焊接速度的比值大小是保证接头致密性和决定组织、性能的关键因素,合适的焊接工艺参数可以获得组织、性能优良的Al/Cu接头.板材厚度较小时,形成良好焊缝的规范参数范围较宽,焊接过程中接头内部发生了剧烈的塑性流动.由于摩擦热与变形能的共同作用,在焊缝内部形成了Al3.892Cu6.108型金属间化合物,使焊缝局部区域硬度升高. 相似文献