PDF(3707 KB)
PDF(3707 KB)
PDF(3707 KB)
转速对铝铜层状复合板搅拌摩擦焊接接头组织性能的影响
Effect of Rotation Rate on Microstructure and Properties of Friction Stir Welded Joints of Al/Cu Clad Plates
({{custom_author.role_en}}), {{javascript:window.custom_author_en_index++;}}采用搅拌摩擦焊接（FSW）对铝铜层状复合板进行焊接，研究转速对焊接接头组织性能的影响。结果表明：FSW接头在焊缝区域内铝铜金属呈层状分布；随着搅拌头转速的增大，焊核区（NZ）中铝与铜晶粒尺寸增大；转速为1180 r/min时，铝层焊缝中心区域平均显微硬度为33.0 HV，超过母材显微硬度，抗拉强度为127.21 MPa；转速为750 r/min时，铜层焊缝中心区域平均显微硬度为99.7 HV，达到母材显微硬度的82.05%；孔洞缺陷是造成接头力学性能较低的主要原因。
Al/Cu clad plates were joined by friction stir welding (FSW), and the effect of rotation rate on microstructure and mechanical properties of joints was investigated. The results show that the laminar structure of aluminum and copper is generated in the weld. With increase the of rotation rate, the grain sizes of aluminum and copper are increased respectively. The average microhardness of the Al/Cu plates exceeds that of the as-received metal of 33.0 HV, and ultimate tensile strength is 127.21 MPa in the nugget zone when rotation rate is 1180 r/min. The microhardness of copper in the nugget zone is 99.7 HV, reached 82.05% of the microhardness of received metal, and void defect is main reason responsible for the decrease of mechanical properties of joints.
7 转速为750 r/min焊接接头宏观断口形貌(a)拉伸试样断裂后宏观照片; (b)断口横截面宏观照片Macrograph fracture surface of tensile specimen at rotation rate of 750 r/min (a)macrograph of tensile specimen after fracture; (b)cross-section of fracture |
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PDF(3707 KB)
1 不同转速下FSW接头横截面宏观形貌(AS侧为前进测；RS为后退侧；MT为硬度测试位置)2 母材显微组织(a)铝层；(b)铜层3 不同转速下铝层NZ显微组织4 不同转速下的铜层NZ显微组织5 焊接接头横截面铝层和铜层的显微硬度分布(a)铝层；(b)铜层6 不同转速下焊接接头的拉伸性能7 转速为750 r/min焊接接头宏观断口形貌(a)拉伸试样断裂后宏观照片; (b)断口横截面宏观照片8 转速为1180 r/min拉伸试样的断口形貌/
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