| 引用本文: | 王希靖,邓向斌,王磊,景文霞.铝/钢搅拌摩擦焊对接焊缝组织及机理研究[J].材料科学与工艺,2015,23(5):77-81.DOI:10.11951/j.issn.1005-0299.20150514. |
| WANG Xijing,DENG Xiangbin,WANG Lei,JING Wenxia.Microstructure and joining mechanism of aluminium-steel friction stir butt welding[J].Materials Science and Technology,2015,23(5):77-81.DOI:10.11951/j.issn.1005-0299.20150514. |
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| 摘要: |
| 为了提高Q235钢板和6082-T6铝合金对接的连接强度,采用搅拌摩擦焊进行对接焊接.研究了不同尺寸和形状的搅拌头、转速、焊接速度和偏移量等对铝钢对接焊缝组织的影响,进而优化了搅拌摩擦焊工艺.实验结果表明:不同形状的搅拌头影响接头“钉子”形状,接头的不同位置处由于受到不同热循环和搅拌导致晶粒尺寸不同,从而影响接头的力学性能.当搅拌针旋转速度260 r/min,焊接速度16 mm/min,针头偏向铝侧0.2 mm时,所得焊缝的拉伸强度为141.204 MPa,为最佳工艺参数.在此最优参数下获得过渡层的厚度约为8 μm,界面的主要成分是FeAl3. |
| 关键词: Q235 6082-T6铝合金 搅拌摩擦焊 焊缝质量 缺陷 |
| DOI：10.11951/j.issn.1005-0299.20150514 |
| 分类号:TG453.9 |
| 基金项目: |
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| Microstructure and joining mechanism of aluminium-steel friction stir butt welding |
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WANG Xijing,DENG Xiangbin,WANG Lei,JING Wenxia
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(State Key Laboratory of Gansu Advanced Nonferrous Metal Materials(Lanzhou University of Technology), Lanzhou 730050,China)
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| Abstract: |
| Friction stir butt welding was employed to improve the joining strength between Q235 steel plate and 6082-T6 aluminum alloy. The welding process was optimized by investigating the effects of various parameters on the welding quality, such as size and shape of the stir-welding head, rotational speed, welding speed, and the offset distance. The results showed that the shape and dimension of stir-welding head had decisive impact on “naill” profile of the joint. The grain size varied across the joint due to non-uniform thermal field during the process resulting in different mechanical properties. After optimization, the tensile strength of the weld could achieve 141.204 MPa and the aluminum-steel transmission layer was about 8 μm which mainly consisted of FeAl3 intermetallics. The optimum process parameters were as follows: rotation speed is 260 rpm, welding speed 16 mm/min and the pin was 0.2 mm towards aluminum alloy side. |
| Key words: Q235 6082-T6 aluminum alloy Friction Stir Welding(FSW) weld quality defects |
