激光技术
激光技術
격광기술
LASER TECHNOLOGY
2013年
6期
712-717
,共6页
邹宇峰%金湘中%何依宁%张宏圭%杨洪亮
鄒宇峰%金湘中%何依寧%張宏圭%楊洪亮
추우봉%금상중%하의저%장굉규%양홍량
激光技术%抗拉强度%填镁%铝合金
激光技術%抗拉彊度%填鎂%鋁閤金
격광기술%항랍강도%전미%려합금
laser technique%tensile strength%filling magnesium%aluminum alloy
在铝合金激光搭接焊中，镁元素烧损将大大降低焊缝的抗拉强度。为了消除铝合金激光搭接焊中镁元素的烧损对焊接接头的负面影响，采用在铝合金激光焊接接头中填加镁粉的方法，研究焊接速率对镁元素烧损的影响。实验中，测量了焊缝中镁元素在垂直和水平方向的分布，并对焊接接头抗拉强度进行了测试；分析了焊接接头中镁含量和抗拉强度之间的关系，比较了填镁量不同时各焊接接头的抗拉强度。结果表明，镁元素的烧损极大地影响了焊缝的抗拉强度，在激光焊接中填镁能有效地提高焊缝的抗拉强度；相比没填镁，填镁的焊接接头抗拉强度最大改善可以达到36.06％；当焊缝中镁元素的质量分数大约是0.026时，抗拉强度强度达到最大值。这为改善铝合金激光焊接接头强度提供了新的理论依据和方法。
在鋁閤金激光搭接銲中，鎂元素燒損將大大降低銲縫的抗拉彊度。為瞭消除鋁閤金激光搭接銲中鎂元素的燒損對銲接接頭的負麵影響，採用在鋁閤金激光銲接接頭中填加鎂粉的方法，研究銲接速率對鎂元素燒損的影響。實驗中，測量瞭銲縫中鎂元素在垂直和水平方嚮的分佈，併對銲接接頭抗拉彊度進行瞭測試；分析瞭銲接接頭中鎂含量和抗拉彊度之間的關繫，比較瞭填鎂量不同時各銲接接頭的抗拉彊度。結果錶明，鎂元素的燒損極大地影響瞭銲縫的抗拉彊度，在激光銲接中填鎂能有效地提高銲縫的抗拉彊度；相比沒填鎂，填鎂的銲接接頭抗拉彊度最大改善可以達到36.06％；噹銲縫中鎂元素的質量分數大約是0.026時，抗拉彊度彊度達到最大值。這為改善鋁閤金激光銲接接頭彊度提供瞭新的理論依據和方法。
재려합금격광탑접한중，미원소소손장대대강저한봉적항랍강도。위료소제려합금격광탑접한중미원소적소손대한접접두적부면영향，채용재려합금격광한접접두중전가미분적방법，연구한접속솔대미원소소손적영향。실험중，측량료한봉중미원소재수직화수평방향적분포，병대한접접두항랍강도진행료측시；분석료한접접두중미함량화항랍강도지간적관계，비교료전미량불동시각한접접두적항랍강도。결과표명，미원소적소손겁대지영향료한봉적항랍강도，재격광한접중전미능유효지제고한봉적항랍강도；상비몰전미，전미적한접접두항랍강도최대개선가이체도36.06％；당한봉중미원소적질량분수대약시0.026시，항랍강도강도체도최대치。저위개선려합금격광한접접두강도제공료신적이론의거화방법。
Magnesium is an important strengthening alloying element in aluminum alloy , the burning loss of which will greatly reduce such mechanical property of the welds as the tensile strength during laser lap welding of aluminum alloy .In order to eliminate the negative effect of the burning loss of magnesium on mechanical property of the welds , filling magnesium powder is adopted filled in laser welding aluminum alloy .The contents of magnesium in the welds were measured both in the vertical and horizontal directions , and the effect of welding velocity on the burning loss of magnesium was experimentally studied .Then, the tensile strength of the welds was tested .Compared after comparing the tensile strength of the welds under different magnesium contents , the relationship between the content of magnesium element of the welds and tensile strength was studied .The results show that the reduction of magnesium content due to the burning loss of magnesium can greatly affect the tensile strength of the welds , filling magnesium during laser welding can effectively improve the tensile strength of the welds , the maximum of the improvement can reach to 36.06%compared to those without filling magnesium.When the mass fraction of the magnesium element in the welds is about 0.026,the tensile strength of the welds reaches the maximum .This study provides new theoretical basis and methods to improve the strength of aluminum alloy laser welded joints .
