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首页> 外文期刊>Journal of Manufacturing Processes >Tool geometry optimization in friction stir spot welding of Al-steel joints
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Tool geometry optimization in friction stir spot welding of Al-steel joints

机译：铝钢接头搅拌摩擦点焊的刀具几何优化

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摘要

The necessity to reduce the weight of transport structures, such as cars and airplanes, has become more important due to gas emission regulations. In this regard, the use of hybrid structures made of steel and aluminum is a way to achieve this goal. Joining aluminum to steel is a great challenge and Friction Stir Spot Welding (FSSW) has become as a new potential welding technique to produce dissimilar joints. Despite Friction Stir Welding has been studied on different similar joints, the information related to the influence of FSSW parameters on the evolution of aluminum-steel joints is scarce. So, the effect of the tool geometry and its penetration depth during FSSW of AA5052-LCS (Low Carbon Steel) joints, has been studied. During FSSW, axial load and consumed electrical current were recorded in order to improve the understanding of the welding process. Macro and microstructural characterization was done on the cross section of the welded spots. The mechanical properties of the joints were determined by microhardness profiles and by Peel and Cross Tension tests. The fracture loads increased when the tool penetration depth goes up. The tool geometry optimization also increased the fracture loads. (C) 2017 The Society of Manufacturing Engineers. Published by Elsevier Ltd. All rights reserved.
机译：由于气体排放法规，减轻汽车和飞机等运输结构重量的必要性变得越来越重要。在这方面，使用钢和铝制成的混合结构是实现此目标的一种方法。将铝和钢连接起来是一个巨大的挑战，摩擦搅拌点焊（FSSW）已成为生产异种接头的一种新的潜在焊接技术。尽管已经在不同的相似接头上研究了搅拌摩擦焊，但是与FSSW参数对铝钢接头演变有关的信息却很少。因此，研究了AA5052-LCS（低碳钢）接头在FSSW期间刀具几何形状及其穿透深度的影响。在FSSW期间，记录轴向载荷和消耗的电流，以增进对焊接过程的了解。对焊接点的横截面进行宏观和微观结构表征。接头的机械性能由显微硬度曲线以及剥离和交叉拉伸测试确定。当工具穿透深度增加时，断裂载荷增加。刀具几何形状的优化也增加了断裂载荷。 （C）2017年制造工程师学会。由Elsevier Ltd.出版。保留所有权利。

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