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兵工学报 ›› 2019, Vol. 40 ›› Issue (11): 2311-2318.doi: 10.3969/j.issn.1000-1093.2019.11.016

• 论文 • 上一篇    下一篇

高氮钢复合焊接接头氮含量和气孔控制方法研究

崔博1,2, 张宏1, 刘双宇1,3, 刘凤德1,4   

  1. (1.长春理工大学 机电工程学院, 吉林 长春 130022;2.北华大学 土木与交通学院, 吉林 吉林 132013;3.长春理工大学 国际科技合作基地(光学), 吉林 长春 130022;4.长春理工大学 跨尺度微纳制造教育部重点实验室, 吉林 长春 130022)
  • 收稿日期:2019-01-28 修回日期:2019-01-28 上线日期:2019-12-31
  • 作者简介:崔博(1988—),男,讲师,硕士。E-mail: db0425@126.com

Research on Control Method of Nitrogen Content and Porosity in Hybrid Welding Joint of High Nitrogen Steel

CUI Bo1,2, ZHANG Hong1, LIU Shuangyu1,3, LIU Fengde1,4   

  1. (1.College of Mechanical and Electric Engineering, Changchun University of Science and Technology, Changchun 130022, Jilin, China; 2.College of Transportation and Civil Engineering, Beihua University, Jilin 132013, Jilin, China;3.National Base of International Science and Technology Cooperation in Optics, Changchun University of Science and Technology, Changchun 130022, Jilin, China; 4.Ministry of Education Key Laboratory for Cross-Scale Micro and Nano Manufacturing, Changchun University of Science and Technology, Changchun 130022, Jilin, China)
  • Received:2019-01-28 Revised:2019-01-28 Online:2019-12-31

摘要: 为解决高氮钢熔焊过程中出现的气孔和氮损失问题,采用激光-电弧复合焊接技术对高氮钢进行焊接试验。研究了保护气体成分、焊丝成分和超声振动对焊接接头气孔率和氮含量的影响。结果表明:当保护气体为Ar+N2时,随着保护气体中N2比例的增大,焊缝氮含量升高,气孔率呈先降低、后升高的趋势;当向Ar+N2中添加2%的O2后,氮含量和气孔率明显升高,且随着N2比例的增大,焊缝氮含量增多,但气孔率呈无规律变化;随着焊丝氮含量的增加,焊缝氮含量呈先升高、后降低趋势,气孔率呈先降低、后升高趋势;随着超声功率的增加,焊缝氮含量略有降低,气孔率呈先降低、后升高趋势;适当的保护气体和焊丝成分可提高焊缝氮含量的同时并能够抑制焊缝气孔形成,超声功率为180 W时抑制气孔效果最好。

关键词: 高氮钢, 复合焊接, 焊接气孔, 氮含量, 保护气体, 焊丝, 超声振动

Abstract: The laser-arc hybrid welding test of high nitrogen steel was carried out to solve the porosity and nitrogen loss of high nitrogen steel during welding. The effects of shielding gas composition, welding wire composition and ultrasonic vibration on the porosity and nitrogen content of welded joint were investigated. The results show that, when the shielding gas is Ar+N2, the nitrogen content of welded point increases with the proportion of nitrogen in the shielding gas, and the porosity decreases first and then increases. When 2% O2 is added to Ar+N2, the nitrogen content and porosity increase obviously. With the increase in the proportion of nitrogen, the nitrogen content in welded joint increases, but the porosity changes irregularly. With the increase in nitrogen content in the welding wire, the nitrogen content of welded joint increases first and then decreases, and the porosity decreases first and then increases. With the increase in ultrasonic power, the nitrogen content of welded joint decreases slightly, and the porosity decreases first and then increases. Appropriate shielding gas and welding wire composition can be used to improve the nitrogen content of welded joint, and inhibit the formation of weld porosity. The porosity is suppressed in the best effect when the ultrasonic power is 180 W. Key

Key words: highnitrogensteel, hybridwelding, weldingporosity, nitrogencontent, shieldinggas, weldingwire, ultrasonicvibration

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