本文關(guān)鍵詞： 激光技術(shù) 激光焊接 激光填絲焊 熔池 SiC粒子示蹤法　出處：《中國激光》2017年11期 　論文類型：期刊論文

【摘要】：通過SiC顆粒示蹤法獲得了焊絲填充對熔池表面流動的影響規(guī)律,分析了不同的焊接工藝、焊絲填送模式和送絲角度對熔池表面波動行為及焊縫成形的影響。結(jié)果表明,在激光自熔焊過程中,熔池表面液態(tài)金屬向后方及熔池另一側(cè)流動,熔池表面波動較劇烈,焊縫表面出現(xiàn)凹陷缺陷;在激光填絲焊過程中,熔池表面金屬全部表現(xiàn)為從前向后的快速流動,熔池表面波動相對穩(wěn)定,焊縫表面成形良好。在激光填絲焊過程中,焊絲的過渡模式對熔池表面穩(wěn)定性有顯著影響,降低送絲角度有利于獲得穩(wěn)定的液橋過渡及減少焊縫氣孔缺陷。
[Abstract]:The effect of wire filling on the surface flow of molten pool was obtained by SiC particle tracer method. The effects of different welding process, wire feeding mode and wire feeding angle on the surface fluctuation behavior and weld formation were analyzed. During laser self-fusion welding, the liquid metal on the surface of the molten pool flows to the rear and the other side of the weld pool, the surface of the pool fluctuates sharply, and the surface of the weld appears sunken defects. All the metals on the surface of the molten pool show a rapid forward to backward flow, the fluctuation of the surface of the pool is relatively stable, and the weld surface is well formed. In the process of laser wire filling welding, the transition mode of the welding wire has a significant effect on the surface stability of the weld pool. Reducing wire feeding angle is beneficial to obtain stable liquid bridge transition and reduce weld porosity.
【作者單位】： 華北水利水電大學(xué)機械學(xué)院;哈爾濱工業(yè)大學(xué)先進焊接與連接國家重點實驗室;
【基金】：河南省自然科學(xué)基金(162300410191) 河南省高等學(xué)校重點科研項目(17A430021) 華北水利水電大學(xué)高層次人才科研啟動基金(201705006)
【分類號】：TG456.7

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