Y. S. Oglodkova, K. V. Antipov, M. Panteleev, A. Rudchenko
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引用次数: 0
摘要
研究了在不同氩弧焊参数下获得的Al - Mg - Si - Cu系V-1381铝合金薄板焊接接头显微组织的形成特征。所选择的焊接方式能够提供高质量的焊接接头,并且强度不低于母材强度的0.8。在不施加拉伸变形的情况下,不使用填充丝的焊接会导致开裂,与SvAMg61和SvAK5相比,使用Sv1221填充丝可使焊接接头的强度特性提高15 - 20%。测定了V-1381合金薄板焊接接头的耐腐蚀性能。对激光焊接的各种实验模式进行了测试,研究了焊接接头的显微组织和力学性能。参数的选择保证了焊缝的高质量。建立了激光焊接V-1381合金半成品的可能性。新的V-1381合金可以推荐用于飞机机身结构元件,包括作为D16型耐腐蚀性较差的不可焊接合金的替代品,这将增加结构的重量效率,因为增加了强度,并且通过使用焊接接头而不是铆接接头。
Study of weldability of semi-products from an alloy of the Al – Mg – Si – Cu system
The features of the formation of the microstructure of welded joints of sheets of aluminum alloy V-1381 of the Al – Mg – Si – Cu system, obtained with various parameters of automatic argon-arc welding, were studied. Welding modes were selected that provide a high-quality welded joint and strength at a level not lower than 0.8 of the strength of the base metal. It has been established that welding without filler wire leads to cracking without applying tensile deformation, the use of Sv1221 filler wire compared to SvAMg61 and SvAK5 leads to an increase in the strength characteristics of welded joints by 15 – 20 %. Corrosion resistance of welded joints of sheets from V-1381 alloy was determined. Various experimental modes of laser welding were tested, the microstructure and mechanical properties of welded joints were studied. Parameters have been selected that ensure high quality of welds. The possibility of using laser welding for semi-finished products from alloy V-1381 has been established. The new V-1381 alloy can be recommended for use in aircraft fuselage structural elements, including as an alternative to less corrosion-resistant non-weldable alloys of the D16 type, which will increase the weight efficiency of structures both due to increased strength and through the use of welded joints instead of riveted ones.