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首页> 外文期刊>International Journal of Naval Architecture and Ocean Engineering >Control of surface defects on plasma-MIG hybrid welds in cryogenic aluminum alloys
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Control of surface defects on plasma-MIG hybrid welds in cryogenic aluminum alloys

机译：低温铝合金中等离子-MIG混合焊缝表面缺陷的控制

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Lately, high production rate welding processes for Al alloys, which are used as LNG FPSO cargo containment system material, have been developed to overcome the limit of installation and high rework rates. In particular, plasma-metal inert gas (MIG) hybrid (PMH) welding can be used to obtain a higher deposition rate and lower porosity, while facilitating a cleaning effect by preheating and post heating the wire and the base metal. However, an asymmetric undercut and a black-colored deposit are created on the surface of PMH weld in Al alloys. For controlling the surface defect formation, the wire feeding speed and nozzle diameter in the PMH weld was investigated through arc phenomena with high-speed imaging and metallurgical analysis.
机译：最近，已经开发了用于LNG FPSO货物围护系统材料的铝合金的高生产率焊接工艺，以克服安装限制和高返工率。特别地，等离子金属惰性气体（MIG）混合（PMH）焊接可用于获得更高的沉积速率和更低的孔隙率，同时通过预热和后加热焊丝和贱金属来促进清洁效果。但是，铝合金的PMH焊缝表面会形成不对称的咬边和黑色沉积物。为了控制表面缺陷的形成，通过电弧现象，高速成像和冶金分析研究了PMH焊缝中的送丝速度和喷嘴直径。

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