高频脉冲复合直流TIG对6N01铝合金焊接接头组织和硬度的影响
|
摘要
采用高频脉冲电流复合直流TIG(Tungsten Inert Gas)焊对6N01铝合金进行焊接,通过高速摄像采集电弧形态,对复合不同频率高频脉冲电流的电弧形态进行观测,并观察焊接接头的微观组织,对接头硬度进行测量,研究直流TIG复合不同频率高频脉冲对6N01铝合金接头组织和显微硬度的影响.结果表明,在直流TIG基础上复合不同频率的高频脉冲电流,电弧稳定性良好;当复合频率为55 kHz时,焊接接头中心区域和熔合线的晶粒细化效果最好,硬度提升幅度最大.
6 N01 aluminum alloy was welded by high-frequency pulse current coupled with DC TIG. Arc shapes of different frequencies pulse current was collected and observed by high-speed camera. The microstructure of the welded joints was observed and the hardness was measured. The effects of high-frequency pulse current coupled with DC TIG on the microstructure and micro-hardness of 6 N01 aluminum alloy welded joints were investigated. The results show that the arc stability of high-frequency pulse current coupled with DC TIG is good. When the frequency is 55 kHz, the grain size of the center zone and fusion line of the welded joints is the smallest, and the increase of hardness is the largest.
6 N01 aluminum alloy was welded by high-frequency pulse current coupled with DC TIG. Arc shapes of different frequencies pulse current was collected and observed by high-speed camera. The microstructure of the welded joints was observed and the hardness was measured. The effects of high-frequency pulse current coupled with DC TIG on the microstructure and micro-hardness of 6 N01 aluminum alloy welded joints were investigated. The results show that the arc stability of high-frequency pulse current coupled with DC TIG is good. When the frequency is 55 kHz, the grain size of the center zone and fusion line of the welded joints is the smallest, and the increase of hardness is the largest.
引文
[1] 贺春林,孟小丹,马国峰,等.6000系铝合金晶间腐蚀研究进展[J].沈阳大学学报(自然科学版),2014,26(1):18-23.HE C L,MENG X D,MA G F,et al.Research development in intergranular corrosion of 6000-series aluminum alloys[J].Journal of Shenyang University (natural science),2014,26(1):18-23.
[2] 刘家伦,周哲,姜月,等.6N01铝合金FSW接头微观组织及力学性能研究[J].热加工工艺,2018,47(17):47-50.LIU J L,ZHOU Z,JIAN Y,et al.Microstructure and mechanical properties of 6N01 aluminum alloy FSW joint[J].Hot working technology,2018,47(17):47-50.
[3] 赵炬,刘长江,曾岳军.浅谈低碳钢薄板件的焊接变形[J].沈阳大学学报,1993,5(2):34-37.ZHAO J,LIU C J,ZENG Y J.A study on the welding deformation of Low carbon sheet steel[J].Journal of Shenyang University,1993,5(2):34-37.
[4] WANG L W,SUO Y C,WU C F,et al.Effect ofpulse frequency on microstructure and mechanical properties of 2198 Al-Li Alloy joints obtained by ultrahigh-frequency pulse AC CMT welding[J].Materials,2019,12(1):79.
[5] 张向钧,陈刚辉,丁志成.不同脉冲频率对A6N01铝合金焊接接头组织的影响[J].电焊机,2018,48(3):139-144.ZHANG X J,CHEN G H,DING Z C.Effect of different pulse frequency on the microstructure of A6N01 aluminum alloy welded joint[J].Electric welding machine,2018,48(3):139-144.
[6] 陈刚辉,张向钧,谭旺有.不同脉冲频率对A6N01铝合金焊接接头力学性能的影响[J].电焊机,2018,48(3):241-245.CHEN G H,ZHANG X J,TAN W Y.Effects of different pulse frequency on mechanical properties of A6N01 aluminum alloy welded joints[J].Electric welding machine,2018,48(3):241-245.
[7] 王乐笑,从保强,齐铂金,等.超高频脉冲方波电流对5A06铝合金 HPVP-GTAW焊缝的影响[J].焊接学报,2013,34(3):61-64.WANG L X,CONG B Q,QI B J,et al.Effect of ultra-high frequency pulse square-wave current on 5A06 aluminum alloy HPVP-GTAW joints[J].Transactions of the China welding institution,2013,34(3):61-64.
[8] 梁志敏,石康柠,李伟坡,等.6N01铝合金水冷MIG焊接头组织和性能[J].焊接学报,2018,39(9):25-30.LIANG Z M,SHI K N,LI W P,et al.Microstructure and mechanical properties of water-cooled MIG welded joints of 6N01 aluminium alloy[J].Transactions of the China welding institution,2018,39(9):25-30.
[9] 路浩.高速列车用厚板铝合金CMT焊接工艺[J].焊接学报,2015,36(4):75-78.LU H.CMT welding technology of thick aluminum alloy plates for high speed train[J].Transactions of the China welding institution,2015,36(4):75-78.
[2] 刘家伦,周哲,姜月,等.6N01铝合金FSW接头微观组织及力学性能研究[J].热加工工艺,2018,47(17):47-50.LIU J L,ZHOU Z,JIAN Y,et al.Microstructure and mechanical properties of 6N01 aluminum alloy FSW joint[J].Hot working technology,2018,47(17):47-50.
[3] 赵炬,刘长江,曾岳军.浅谈低碳钢薄板件的焊接变形[J].沈阳大学学报,1993,5(2):34-37.ZHAO J,LIU C J,ZENG Y J.A study on the welding deformation of Low carbon sheet steel[J].Journal of Shenyang University,1993,5(2):34-37.
[4] WANG L W,SUO Y C,WU C F,et al.Effect ofpulse frequency on microstructure and mechanical properties of 2198 Al-Li Alloy joints obtained by ultrahigh-frequency pulse AC CMT welding[J].Materials,2019,12(1):79.
[5] 张向钧,陈刚辉,丁志成.不同脉冲频率对A6N01铝合金焊接接头组织的影响[J].电焊机,2018,48(3):139-144.ZHANG X J,CHEN G H,DING Z C.Effect of different pulse frequency on the microstructure of A6N01 aluminum alloy welded joint[J].Electric welding machine,2018,48(3):139-144.
[6] 陈刚辉,张向钧,谭旺有.不同脉冲频率对A6N01铝合金焊接接头力学性能的影响[J].电焊机,2018,48(3):241-245.CHEN G H,ZHANG X J,TAN W Y.Effects of different pulse frequency on mechanical properties of A6N01 aluminum alloy welded joints[J].Electric welding machine,2018,48(3):241-245.
[7] 王乐笑,从保强,齐铂金,等.超高频脉冲方波电流对5A06铝合金 HPVP-GTAW焊缝的影响[J].焊接学报,2013,34(3):61-64.WANG L X,CONG B Q,QI B J,et al.Effect of ultra-high frequency pulse square-wave current on 5A06 aluminum alloy HPVP-GTAW joints[J].Transactions of the China welding institution,2013,34(3):61-64.
[8] 梁志敏,石康柠,李伟坡,等.6N01铝合金水冷MIG焊接头组织和性能[J].焊接学报,2018,39(9):25-30.LIANG Z M,SHI K N,LI W P,et al.Microstructure and mechanical properties of water-cooled MIG welded joints of 6N01 aluminium alloy[J].Transactions of the China welding institution,2018,39(9):25-30.
[9] 路浩.高速列车用厚板铝合金CMT焊接工艺[J].焊接学报,2015,36(4):75-78.LU H.CMT welding technology of thick aluminum alloy plates for high speed train[J].Transactions of the China welding institution,2015,36(4):75-78.