Weldability during the laser lap welding of Al 5052 sheets
Weldability during the laser lap welding of Al 5052 sheets
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发表时间：
2008
影响因子：
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通讯作者：
J. Kim;H. Lim;Jungho Cho;C.H. Kim
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文献类型：
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作者：
J. Kim;H. Lim;Jungho Cho;C.H. Kim
目的：研究了激光搭接焊中激光焦点位置、焊接速度和激光输出功率等激光焊接工艺参数对5052铝合金焊接性的影响。设计/方法/途径：在厚度为1 mm的Al 5052板上进行搭接焊接。焊接后，用各种激光焊接参数对焊道表面和横截面进行评价。还通过X射线透射测试检查孔隙度。调查结果：实验研究了聚焦点、激光功率和焊接速度对焊缝成形和气孔率的影响。与聚焦在表面上相比，当光束散焦时，珠质量得到改善。结果发现，当热输入降低时，孔隙率降低，但下板不熔化时除外。研究限制/影响：各种类型的铝合金，如薄板、挤压和铸造类型，在工业上以不同的组合使用。因此，有必要对这些材料的焊接性进行评价。这项研究仅限于Al 5052合金，目前正在计划将其扩展到各种铝基合金。实际影响：汽车工业正在不断增加其使用的铝合金制造。本研究成果可作为汽车工业的基础技术参考。独创性/价值：这项研究表明，在搭接焊的Al 5052铝合金的焊接性不同的焊接参数的影响。这些结果是在大量实验的基础上得出的。
Purpose: The paper presents the effect of the laser welding parameters of the laser focal position, the welding speed and the laser output power on the weldability of Al the 5052 alloy during laser lap welding. Design/methodology/approach: Lap welding is conducted on an Al 5052 plate with a thickness of 1 mm. After welding, the bead surfaces and cross sections were evaluated with various laser welding parameters. The degree of porosity was also examined by X-ray transmission testing. Findings: The influences of the focal point, the laser power and the welding speed on the formation of bead and on the degree of porosity were experimentally investigated. The bead quality was improved when the beam was defocused compared to when it was focused on the surface. It was found that the porosity decreased when the heat input is lowered, except when the lower plate is not melted. Research limitations/implications: Various types of aluminium alloys, such as sheet, extrusion and casting types, are used industrially in diverse combinations. Therefore, it is necessary to evaluate the weldabilities of these materials. This research is limited to Al 5052 alloys at present plans are underway to expand it to various aluminium based alloys. Practical implications: Automotive industries are continuously increasing their use of aluminium alloys in manufacturing. The results of this research can be referred to by the automotive industry as a basic technique. Originality/value: This research shows the influence of different welding parameters on the weldability during the lap welding of Al 5052 Al alloy. The results are based on the extensive experiments.