4047铝合金成分对激光焊接气孔的影响  

Influence of 4047 Aluminum Alloy Composition on Laser Welded Porosity

作　　者：李宸宇 王传伟[1] 吴昱昆 魏之杰 LI Chenyu;WANG Chuanwei;WU Yukun;WEI Zhijie(China Electronics Technology Group Corporation No.38 Research Institute,Hefei 230088,China)

机构地区：[1]中国电子科技集团公司第三十八研究所,合肥230088

出　　处：《电子与封装》2023年第12期24-28,共5页Electronics & Packaging

摘　　要：4047铝合金被广泛应用于航空航天领域的微波组件中。探究了不同组织成分的4047铝合金在激光焊接中形成气孔的机理。研究结果表明,合金中的Si含量偏低会降低材料的热吸收率,导致热熔区流动性降低,易形成气孔。通过增大焊接激光功率提高合金热输入量,可以减少气孔产生,提高产品的气密合格率。合金组织取向性引起的焊接应力增大也易导致焊接气孔的产生,通过在焊前进行消除应力退火处理可以改善焊接质量。4047 aluminum alloy is widely used in microwave components in the aerospace field.The formation mechanism of laser welded porosity in 4047 aluminum alloy with different organizational compositions is investigated.The results show that the low Si content in the alloy reduces the heat absorption rate of the material,leading to reduced mobility in the hot melt zone and easy formation of porosity.By increasing the welding laser power to improve the heat input of the alloy,the generation of porosity can be reduced,and the airtightness qualification rate of the product can be improved.The increased welding stress caused by the orientation of alloy organization can also easily lead to the generation of welded porosity.The welding quality can be improved by performing stress relief annealing treatment before welding.

关 键 词：激光封焊 4047铝合金 焊接气孔 

分 类 号：TN305.94[电子电信—物理电子学] TG442[金属学及工艺—焊接]