Study on the Variation Patterns of Torque and Temperature Field During Friction Stir Welding and Sealing Process
ZHANG Changqing1,2, LIU Enrong2, WANG Dong2, WANG Yaxiong2, SHI Xiaofei2, WANG Yifan2, ZHANG Pengsheng3,*
1 State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China 2 School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China 3 Northwest Nonferrous Metals Research Institute, Xi'an 710016, China
摘要 搅拌摩擦焊接过程中,摩擦扭矩和焊接温度场反映了母材的塑性变形状态。本工作对7075-T6铝合金无缝管环形焊缝进行封焊,采用主轴电机电压电流(Voltage and current of main shaft motor,VCMSM)法计算出不同摩擦转速、焊接速度和焊接顺序下搅拌摩擦焊过程中搅拌头与母材间的摩擦扭矩,并对焊缝温度进行采集。结果表明,摩擦扭矩在经历两次波动后逐渐趋于稳定并建立稳定摩擦的趋势,摩擦扭矩波动较小的工艺参数焊缝成形较好;焊接过程温度峰值主要受到工艺参数的影响,前进侧在管件内侧焊接温度峰值比前进侧在外侧更高。
Abstract: During the friction stir welding process, the frictional torque and the welding temperature field mirror the plastic deformation status of the base material. In this work, the friction stir welding of the seamless aluminum alloy pipe of 7075-T6 was performed. The frictional torque between the tool and the base material was calculated by employing the voltage and current of main shaft motor method at three different welding process parameters: friction speeds, welding speeds, and welding directions. The welding temperature was measured indirectly by converting the tempe-rature signal into an electrical signal through a K-type thermocouple and an AD8495 amplifier. The experimental findings revealed that the friction torque exhibited a characteristic trend of undergoing two distinct fluctuations before gradually stabilizing to establish a steady friction regime. Process parameters associated with reduced torque fluctuations produced welds with enhanced formation quality. Meanwhile, the peak temperature during welding was predominantly governed by process parameters, with configurations featuring the advancing side positioned internally exhibiting higher peak temperatures compared to those with externally positioned advancing sides.
张昌青, 刘恩荣, 王栋, 王亚雄, 石消飞, 王一帆, 张鹏省. 搅拌摩擦封焊过程扭矩和温度场变化规律研究[J]. 材料导报, 2026, 40(1): 24120074-5.
ZHANG Changqing. Study on the Variation Patterns of Torque and Temperature Field During Friction Stir Welding and Sealing Process. Materials Reports, 2026, 40(1): 24120074-5.
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2026, Vol. 40 
