铝合金焊接接头的设计特点

铝合金焊接接头的设计特点 Design characteristics of welded joints of aluminum alloy 吕同辉 LV Tonghui 1 first-author 哈尔滨焊接技术培训中心 哈尔滨焊接技术培训中心 Harbin Welding Technology Training Center Harbin Welding Technology Training Center 相对于钢制结构,铝及其合金具有材质轻、无低温脆性、耐腐蚀和易于压力加工的优势。虽然与成熟的钢结构的设计和焊接制造相比,铝合金的结构和焊接制造原则没有变化,但与传统钢材相比,铝合金在强度、弹性模量、密度、导热系数、热膨胀系数等方面都有显著的不同,所以在焊接接头的强度设计和接头细节部分都与钢接头有较大不同。本文主要关注焊接热影响区强度减弱、焊接接头细节包括坡口形式、背面保护等问题。前者结合EN1999-1-1进行分析,后者结合ISO9692-3和EN1011-4进行分析。 Comparing with steel structure,aluminum and its alloys have the advantages of light material,no low temperature brittleness,corrosion resistance and easy pressure processing. Although the principles of the structure design and welding for aluminum alloy do not change comparing with steel structure,but the strength,elastic modulus,density,thermal conductivity and thermal expansion coefficient of aluminum alloy are significantly different from steel,so the strength design and joint details of welded joint are quite different from the steel joints. The main point of this paper is the weakening of the strength of welding heat affected zone, the details of welded joints including groove type and back protection and so on. The former is analyzed by EN1999-1-1 and the latter is analyzed by ISO9692-3 and EN1011-4. 钢结构 铝合金焊接接头 焊接热影响区 强度下降 steel structure welded joint of aluminum alloy welding HAZ reduction in strength TG457.14 2022-03-08 4 50