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首页> 美国卫生研究院文献>Materials >The Preliminary Exploration of Micro-Friction Stir Welding Process and Material Flow of Copper and Brass Ultra-Thin Sheets
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The Preliminary Exploration of Micro-Friction Stir Welding Process and Material Flow of Copper and Brass Ultra-Thin Sheets

机译：铜和黄铜超薄板微摩擦搅拌焊接工艺及材料流动的初步探讨

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摘要

In the friction stir welding (FSW) of ultra-thin dissimilar metal sheets, different physical material properties, the reduction of plastic metal in the weld zone, and insufficient plastic metal flow lead to poor weld seam shapes and joint qualities. Therefore, it is necessary to study the flow behavior during the FSW of ultrathin sheets. In this study, micro friction stir welding (μFSW) was conducted and analyzed for the butt welding of 0.6-mm-thick ultrathin brass (H62-H) and pure copper (T2-Y) sheets. By analyzing the electric signals of the temperature and force during the welding process, testing the mechanical properties, and analyzing the metallography of the joint, the influences of the process parameters on the metal flow behavior during μFSW were studied. In the proper process conditions, the material preferentially migrated and concentric vortex flow occurred in the vicinity of the shoulder and tool pin action areas. The copper was pushed from the retreating side (RS) to the advancing side (AS) of the weld, allowing it to flow more fully. A mixture of both materials formed at the bottom of the weld nugget, and less migration occurred in the heat-affected zone of the AS at this time. The highest tensile strength can reach 194 MPa, accounting for 82.6% of the copper. The presence of brittle phases Cu Zn , AgZn and AgZn caused the hardness to fluctuate slightly.
机译：在超薄异种金属板的搅拌摩擦焊（FSW）中，不同的物理材料特性，焊接区域中塑性金属的减少以及塑性金属流动不足会导致不良的焊缝形状和接头质量。因此，有必要研究超薄板FSW期间的流动行为。在这项研究中，进行了微摩擦搅拌焊接（μFSW）并分析了0.6毫米厚的超薄黄铜（H62-H）和纯铜（T2-Y）板的对接焊。通过分析焊接过程中温度和力的电信号，测试机械性能并分析接头的金相，研究了工艺参数对μFSW期间金属流动行为的影响。在适当的工艺条件下，材料优先迁移，同心涡流在肩部和工具销作用区域附近发生。将铜从焊缝的后退面（RS）推向焊缝的前进面（AS），使其更充分地流动。这两种材料的混合物形成在焊核的底部，此时，在AS的热影响区发生的迁移较少。最高抗拉强度可达到194 MPa，占铜的82.6％。脆性相Cu Zn，AgZn和AgZn的存在导致硬度略有波动。

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