發(fā)布時(shí)間：2018-03-20 21:14

  本文選題：大間隙焊接　切入點(diǎn)：高速焊接　出處：《焊接學(xué)報(bào)》2015年10期 　論文類型：期刊論文

【摘要】：采用填充ER316焊絲的光纖激光-MIG電弧復(fù)合焊方法,焊接間隙為0.5 mm、厚度為1 mm的SUS444鐵素體不銹鋼薄板對接接頭和搭接接頭,研究了獲得成形良好的對接接頭和搭接接頭的工藝參數(shù)窗口和極限焊接速度,并對焊縫進(jìn)行了著色滲透檢驗(yàn)和拉伸試驗(yàn).結(jié)果表明,合理匹配焊接速度和焊接電流,是獲得成形良好的大間隙接頭的關(guān)鍵;當(dāng)焊接速度過小或焊接電流過大時(shí),較大的熱輸入導(dǎo)致焊縫過度熔透,焊縫成形不良;當(dāng)焊接速度過大或焊接電流過小時(shí),較小的熱輸入導(dǎo)致焊縫未熔透.對接接頭焊縫成形質(zhì)量良好且熔透的極限焊接速度可達(dá)12 m/min,而搭接接頭的極限焊接速度為5 m/min.成形良好的焊縫均未發(fā)現(xiàn)表面裂紋.拉伸試驗(yàn)表明,對接接頭斷裂在母材上;搭接接頭絕大部分?jǐn)嗔言谌酆暇�附近,極限焊接速度下獲得的搭接接頭的抗拉強(qiáng)度是母材的84.2%.
[Abstract]:The fiber laser MIG arc composite welding method filled with ER316 wire was used. The welding gap was 0.5 mm and the thickness was 1 mm. The SUS444 ferrite stainless steel sheet butt joint and lap joint were used. The process parameter window and the limit welding speed of the well formed butt joint and lap joint are studied, and the coloring penetration test and tensile test of the weld are carried out. The results show that the welding speed and the welding current are reasonably matched. When the welding speed is too small or the welding current is too large, the larger heat input results in the weld overpenetration and the weld formation is not good; when the welding speed is too high or the welding current is too low, The weld is not permeated by small heat input. The welding quality of butt joint is good and the limit welding speed of penetration is up to 12 m / min, while the limit welding speed of lap joint is 5 m / min. No surface cracks have been found in the well formed weld. ... Tensile tests show that. The butt joint is broken on the base metal, and most of the lap joints are broken near the fusion line. The tensile strength of the lap joint obtained under the limit welding speed is 84.2 of the base metal.
【作者單位】： 清華大學(xué)機(jī)械工程系;清華大學(xué)先進(jìn)成形制造教育部重點(diǎn)實(shí)驗(yàn)室;
【分類號】：TG457.11

【參考文獻(xiàn)】

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本文編號：1640828