LY12铝合金蒙皮骨架结构激光填丝焊接工艺研究
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摘要
对LY12铝合金蒙皮骨架结构进行碟片激光填丝焊接试验研究。结果表明:通过激光填丝焊,铝合金可以获得焊缝表面成形良好的接头。激光功率、光丝间距、离焦量是影响焊缝成形的主要因素,激光功率3500～4000 W、光丝间距0 mm、离焦量+5 mm、焊接速度1.5 m/min时焊缝成形最佳。保护气流量为15 L/min时,接头的抗拉强度为325MPa,达到母材强度的77%,拉伸试样断裂在热影响区靠近熔合线的位置。
The disk laser welding with filler wire test of LY12 aluminum alloy envelop-skeleton structure was carried out.The results show that the joint with good forming can be obtained by laser welding of aluminum alloy with filler wire. The laser power, distance between laser and wire and defocusing distance of laser beam are the main key factors affecting the weld forming. The best welding joint is obtained when the laser power is 3500-4000 W, the distance between laser and wire is0 mm, the defocusing distance of laser beam is +5 mm, the welding speed is 1.5 m/min.The tensile strength of the joint is 325 MPa when the protection gas flow rate is 15 L/min, which is 77% of the strength of base metal, and the fracture position of tensile samples is located at the heat affected zone near fusion line.
The disk laser welding with filler wire test of LY12 aluminum alloy envelop-skeleton structure was carried out.The results show that the joint with good forming can be obtained by laser welding of aluminum alloy with filler wire. The laser power, distance between laser and wire and defocusing distance of laser beam are the main key factors affecting the weld forming. The best welding joint is obtained when the laser power is 3500-4000 W, the distance between laser and wire is0 mm, the defocusing distance of laser beam is +5 mm, the welding speed is 1.5 m/min.The tensile strength of the joint is 325 MPa when the protection gas flow rate is 15 L/min, which is 77% of the strength of base metal, and the fracture position of tensile samples is located at the heat affected zone near fusion line.
引文
[1]来建. LY12铝合金激光-电弧复合焊接工艺研究[D].武汉:华中科技大学,2009:1.
[2]周万盛,姚君山.铝及铝合金的焊接[M].北京:机械工业出版社,2006:75-76.
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[4]陈和,杨成刚,郑强,等.不同焊丝对LY12铝合金TIG焊接头组织与性能的影响[J].热加工工艺,2014,43(9):159-161.
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[6]陈彦宾.现代激光焊接技术[M].北京:科学出版社,2005:99-100.
[7]梅汉华,肖荣诗,左铁钏.采用填充焊丝激光焊接工艺的研究[J].北京工业大学学报, 1996, 22(3):38-41.
[8]王孝虎.铝合金激光填丝焊缺陷分析及改进措施研究[D].哈尔滨:哈尔滨工业大学,2015:1-2.
[2]周万盛,姚君山.铝及铝合金的焊接[M].北京:机械工业出版社,2006:75-76.
[3]高双欣. 2024与7075异种高强铝合金激光填丝焊接技术研究[D].北京:北京工业大学,2011:14-15.
[4]陈和,杨成刚,郑强,等.不同焊丝对LY12铝合金TIG焊接头组织与性能的影响[J].热加工工艺,2014,43(9):159-161.
[5]刘会杰,闫久春,魏艳红,等.焊接冶金与焊接性[M].北京:机械工业出版社,2007:214-216.
[6]陈彦宾.现代激光焊接技术[M].北京:科学出版社,2005:99-100.
[7]梅汉华,肖荣诗,左铁钏.采用填充焊丝激光焊接工艺的研究[J].北京工业大学学报, 1996, 22(3):38-41.
[8]王孝虎.铝合金激光填丝焊缺陷分析及改进措施研究[D].哈尔滨:哈尔滨工业大学,2015:1-2.