采用辅助能量的搅拌摩擦焊新工艺

发布时间：2018-03-16 18:09

本文选题：搅拌摩擦焊　切入点：能量辅助　出处：《焊接》2015年10期 　论文类型：期刊论文

【摘要】：常规搅拌摩擦焊一般需要很大的轴向压力和搅拌头转矩来产生足够的摩擦热和塑性功来软化材料形成焊缝。这会导致搅拌头磨损,并限制焊接速度的提高,尤其是在焊接高强高硬材料时,这种问题变得更加突出。为了解决这些问题,研究人员通常采用辅助能源(激光、电弧热、电阻热、感应热等)来协助软化待焊材料,从而降低轴向压力和搅拌头转矩,并提高焊接速度。然而,对于作为固相连接的搅拌摩擦焊,这种直接加热的方式往往具有一些固有的不足之处。作为一类机械能,超声振动能够在无显著加热的条件下降低金属材料的变形抗力。因此,利用超声振动作为辅助能源,构成超声强化的搅拌摩擦焊新工艺,可改善焊接质量、降低焊接载荷、提高焊接速度,具有很大的发展潜力。文中对这些采用外加辅助能量的搅拌摩擦焊新工艺技术进行了评述,并对该领域下一步的研发方向进行了展望。
[Abstract]:Conventional friction stir welding usually requires great axial pressure and torque to produce enough friction heat and plastic work to soften the material to form a weld. To solve these problems, researchers usually use auxiliary energy sources (laser, arc heat, resistance heat, induction heat, etc.) to help soften the materials to be welded. Thus reducing axial pressure and torque of stir head, and increasing welding speed. However, for friction stir welding, which is a solid-state connection, this direct heating method often has some inherent shortcomings, as a kind of mechanical energy, Ultrasonic vibration can reduce the deformation resistance of metal materials without obvious heating. Therefore, using ultrasonic vibration as auxiliary energy to form a new technology of ultrasonic strengthened friction stir welding can improve the welding quality and reduce the welding load. In this paper, the new technology of friction stir welding with additional auxiliary energy is reviewed, and the next research direction in this field is prospected.
【作者单位】：山东大学材料连接技术研究所;
【分类号】：TG453.9

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