皮秒脉冲激光清洗铝合金工艺试验研究
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摘要
由于铝合金易自然氧化,影响焊接质量,采用波长为1 064nm,脉宽为10ps的皮秒脉冲激光器对5A06铝合金表面氧化膜进行了激光清洗工艺试验,研究了激光平均功率、光斑重叠率、扫描轨迹重叠率和辅助气体等工艺参数对清洗表面质量的影响规律。结果表明,当激光平均功率为100 W,光斑重叠率和扫描轨迹重叠率为40%时,能够在保证清洗质量的前提下获得最大的清洗效率,在较低功率清洗时需要较高的重叠率才能达到较好的清洗质量,在氩气中清洗可以有效避免铝合金表面的二次氧化。
Because aluminum alloy is easy to oxidize naturally and affects the quality of welding,a laser cleaning process experiment of surface oxide film on aluminum alloy is carried out with a wavelength of 1 064 nm and a pulse width of 10 ps picosecond pulse laser.The influences of average laser power,spot overlap ratio,scanning path overlap ratio and auxiliary gas on cleaning surface quality are explored.The results show that the maximum cleaning efficiency on the premise of ensuring the cleaning quality can be obtained under the conditions of average laser power 100 W,spot overlap ratio and scanning path overlap ratio are 40%,higher overlap ratio is needed to achieve good cleaning quality when cleaning in lower average laser power,the reoxidation of aluminum alloy surface can be avoided effectively when cleaning in argon.
Because aluminum alloy is easy to oxidize naturally and affects the quality of welding,a laser cleaning process experiment of surface oxide film on aluminum alloy is carried out with a wavelength of 1 064 nm and a pulse width of 10 ps picosecond pulse laser.The influences of average laser power,spot overlap ratio,scanning path overlap ratio and auxiliary gas on cleaning surface quality are explored.The results show that the maximum cleaning efficiency on the premise of ensuring the cleaning quality can be obtained under the conditions of average laser power 100 W,spot overlap ratio and scanning path overlap ratio are 40%,higher overlap ratio is needed to achieve good cleaning quality when cleaning in lower average laser power,the reoxidation of aluminum alloy surface can be avoided effectively when cleaning in argon.
引文
[1]冯杰才,赵慧峰,吴金鹏.一种铝合金氧化膜焊前激光清洗设备:201620441812.4[P].2016-05-17.
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[3]陈家璧,彭润玲.激光原理及应用:第3版[M].北京:电子工业出版社,2013:191-192.
[4]DIMOGERONTAKIS T,OLTRA R,HEINTZ O.Thermal oxidation induced during laser cleaning of an aluminium-magnesium alloy[J].Applied Physics A,2005,81(6):1173-1179.
[5]LU Y F,TAKAI M,KOMURO S,et al.Surface cleaning of metals by pulsed-laser irradiation in air[J].Applied Physics A,1994,59(3):281-288.
[6]ALSHAER A W,LI L,MISTRY A.The effects of short pulse laser surface cleaning on porosity formation and reduction in laser welding of aluminium alloy for automotive component manufacture[J].Optics&Laser Technology,2014,64(4):162-171.
[7]董世运,宋超群,闫世兴,等.激光清洗预处理对7A52铝合金激光焊缝成形质量的影响[J].装甲兵工程学院学报,2017,31(4):100-105.
[8]罗雅,王璇,赵慧峰,等.激光清洗对2219铝合金表面形貌及焊接性能的影响[J].应用激光,2017,37(4):544-549.
[9]陈一鸣,周龙早,闫飞,等.铝合金激光清洗机理与质量评估研究[J].中国激光,2017,44(12):1202005.
[10]周旭,陈根余,周聪,等.脉冲紫外激光修整电镀金刚石砂轮试验研究[J].应用激光,2016,36(5):521-526.
[2]周逸凡.5A06铝合金光纤激光-MIG电弧复合焊接工艺研究[D].长沙:湖南大学,2016.
[3]陈家璧,彭润玲.激光原理及应用:第3版[M].北京:电子工业出版社,2013:191-192.
[4]DIMOGERONTAKIS T,OLTRA R,HEINTZ O.Thermal oxidation induced during laser cleaning of an aluminium-magnesium alloy[J].Applied Physics A,2005,81(6):1173-1179.
[5]LU Y F,TAKAI M,KOMURO S,et al.Surface cleaning of metals by pulsed-laser irradiation in air[J].Applied Physics A,1994,59(3):281-288.
[6]ALSHAER A W,LI L,MISTRY A.The effects of short pulse laser surface cleaning on porosity formation and reduction in laser welding of aluminium alloy for automotive component manufacture[J].Optics&Laser Technology,2014,64(4):162-171.
[7]董世运,宋超群,闫世兴,等.激光清洗预处理对7A52铝合金激光焊缝成形质量的影响[J].装甲兵工程学院学报,2017,31(4):100-105.
[8]罗雅,王璇,赵慧峰,等.激光清洗对2219铝合金表面形貌及焊接性能的影响[J].应用激光,2017,37(4):544-549.
[9]陈一鸣,周龙早,闫飞,等.铝合金激光清洗机理与质量评估研究[J].中国激光,2017,44(12):1202005.
[10]周旭,陈根余,周聪,等.脉冲紫外激光修整电镀金刚石砂轮试验研究[J].应用激光,2016,36(5):521-526.