Abstract

Tungsten inert gas (TIG) welding had been applied to produce four double-V butt welded joints performed on thick plates made from 6082-T6 aluminum alloy. The thicknesses of the plates are 18, 45, 60, and 80 mm. This type of aluminum alloy is very sensitive to heat due to its high conductivity and high thermal expansion coefficient. Heat from TIG welding reduces the strength of the cited welded plates in the welding zone and in the heat affected zone (HAZ) and favorites the formation of porosities and solidification cracks in the welded joints. Porosities and solidification cracks are the most frequent imperfection that appear in this type of welded joints and they are often the reason which prevent them to comply with the requirements of the BS EN ISO 10675-2: 2017 Non destructive testing of welds: Acceptance levels for radiography testing—Aluminium and its alloys, and of the BS EN ISO 23277: 2015 penetrant testing of welds—Acceptance levels. This article represents the type of the filler metal that used and the welding parameters that applied to perform TIG welding of the cited thick plates in order to get welded joints that are free from porosities and solidification cracks as confirmed by X-ray radiography and by red dye penetrant testing of these welded joints.

中文翻译：

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根据欧洲标准评估高应力工业应用的 6082-T6 铝厚板焊接接头性能

摘要

已应用钨极惰性气体 (TIG) 焊接在 6082-T6 铝合金制成的厚板上生产四个双 V 对焊接头。板的厚度为 18、45、60 和 80 毫米。由于其高导电性和高热膨胀系数，这种类型的铝合金对热非常敏感。TIG 焊接产生的热量会降低上述焊接板在焊接区和热影响区 (HAZ) 中的强度，并有利于在焊接接头中形成孔隙和凝固裂纹。气孔和凝固裂纹是此类焊接接头中最常见的缺陷，它们通常是阻止它们符合 BS EN ISO 10675-2: 2017 焊缝无损检测要求的原因：射线照相测试的验收水平——铝及其合金，以及 BS EN ISO 23277：2015 焊缝渗透测试——验收水平。本文介绍了所使用的填充金属的类型和用于对引用的厚板进行 TIG 焊接的焊接参数，以获得没有孔隙和凝固裂纹的焊接接头，如 X 射线照相和红色对这些焊接接头进行染色渗透测试。