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为探索使用Ar+O_2混合气的熔化极气体保护焊(GMAW)在焊接316L不锈钢时,保护气体中的O_2比例对焊缝成型的影响,分别使用95%Ar+5%O_2和98%Ar+2%O2进行了管子对接焊试验;并使用98%Ar+2%O_2的保护气分别在短路过渡和射流过渡下进行了板子的对接和堆焊试验,以研究不同熔滴过渡形式的焊缝成型和飞溅率。结果表明:使用95%Ar+5%O_2焊接时的焊缝成型优于98%Ar+2%O_2;射流过渡时的焊缝成型优于短路过渡,且飞溅率大大低于短路过渡。在焊接316L时,提高保护气体中活性气体的比例和使用射流过渡焊接均可改善焊缝成型,此外,射流过渡焊接时的飞溅率极低。
In order to explore the effect of O_2 in shielding gas on the formation of weld during the welding of 316L stainless steel with Ar + O_2 mixed gas arc welding gas (GMAW), 95% Ar + 5% O_2 and 98% Ar + 2% O2 was used for butt welding test of pipe. The protective gas of 98% Ar + 2% O_2 was used to test the butt welding and surfacing of plate in the transition of short circuit and jet to study the weld with different droplet transfer forms Molding and splash rate. The results show that the welding seam formation with 95% Ar + 5% O_2 welding is better than 98% Ar + 2% O_2. The weld formation during jet transition is superior to short circuit transition and the spattering rate is much lower than the short circuit transition. In the welding of 316L, to improve the proportion of active gas in the protective gas and the use of jet transition welding can improve the weld formation, in addition, jet transition welding spatter rate is very low.