| 摘要: |
| 摩擦叠焊是一种新型的固相连接技术,从TWI提出这一概念至今尚不足20年。摩擦叠焊的焊缝由一系列圆柱形或圆锥形组合的摩擦液柱单元成形过程组成,具体包括接触预热、稳定填充、停转顶锻三个阶段,金属棒的转速、轴向力等是影响成形质量的主要参数。从成形机理上看,摩擦叠焊与摩擦塞焊、摩擦堆焊、嵌入摩擦焊等存在着较大差异。由于该技术在干湿环境条件下都能够获得较好的连接质量,因此在材料成形加工尤其是钢结构水下修复作业方面具有巨大的应用潜力。欧盟国家近10年来已经开展了一系列机理研究和工程化应用研究,目前已经具备了水下连接的商业化作业能力。 |
| 关键词: 摩擦液柱成形 摩擦叠焊 连接特性 水下维修 |
| DOI： |
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| 基金项目:国家"863"高技术研究发展计划项目(2006AA09Z329);国家自然科学基金项目(50675022);北京市自然科学基金项目(3073017) |
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| Friction stitch welding-a new kind of material forming technology |
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CHEN Jiaqing1, JIAO Xiangdong1, ZHOU Canfeng1, QIU Zongyi1, LUAN Guohong2
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1.Research Centre of Offshore Engineering Joining Technology, Beijing Institute of Petrochemical Technology, Beijing 102617, China;2.China Friction Stir Welding Center, Beijing 100024, China
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| Abstract: |
| Friction stitch welding is a new kind of solid phase joining technology, it has been less than twenty years since the welding institute put forward this concept.Friction stitch welding consists of a series of friction hydro pillar processing (FHPP) intersecting with each other, either in the form of cylinder-type combination, or taper-type combination.It can be divided into three stages for each FHPP process, i.e., the touch-down conditioning period, the steady pillaring period and the forging period with no stud rotation. The main factors influencing the quality of friction stitch welding include stud rotating speed and axial force applied.There exist great differences from other friction welding processes in forming mechanism, such as friction plug welding, friction surfacing, friction plunge welding and soon.Because friction stitch welding can accomplish good bonding properties under the condition of dry or wet environment, it has great application potentials in material forming process, especially in the case of underwater repair for steel structure. |
| Key words: friction hydro pillar processing friction stitch welding Bonding properties Underwater repair |
