• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2016, Vol. 52 ›› Issue (18): 31-37.doi: 10.3901/JME.2016.18.031

• 材料科学与工程 • 上一篇    下一篇

TIG焊熔池表面流动行为的研究*

黄健康, 孙天亮, 樊丁, 石玗   

  1. 兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室 兰州 730050
  • 出版日期:2016-09-20 发布日期:2016-09-20
  • 作者简介:

    作者简介:黄健康,男,1981年出生,博士,副教授,硕士研究生导师。主要从事焊接物理与焊接过程控制及其数值模拟研究。

    E-mail:sr2810@163.com

  • 基金资助:
    * 国家自然科学基金(51205179)、973计划前期研究专项(2014CB660810)和兰州理工大学红柳青年人才培养计划(Q201202)资助项目; 20151214收到初稿,20160705收到修改稿;

Study on the Surface Flow Behavior of TIG Weld Pool

HUANG Jiankang, SUN Tianliang, FAN Ding, SHI Yu   

  1. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology, Lanzhou 730050
  • Online:2016-09-20 Published:2016-09-20

摘要:

针对钨极惰性气体保护(Tungsten inert gas,TIG)焊熔池表面流动行为,在确定TIG焊熔池表面可采用粒子示踪的方法来进行其表面流动行为示踪的基础上,在以激光为试验背光光源,通过激光在TIG焊熔池表面镜面反射后,使得熔池及示踪粒子清晰成像于成像屏上。在此基础上,开展对304不锈钢和Q235普通碳钢的熔池表面流动行为的试验研究,对所获得这两种材料的TIG焊熔池试验数据进行处理与对比分析,探究熔池表面流动规律。研究结果表明:在TIG焊过程中,其焊接熔池存在两种运动模式,在304不锈钢焊接过程中熔池表面的液态金属由边缘向熔池中心流动;在Q235碳钢焊接过程中熔池表面的液态金属不定向、不规则地由熔池中心向熔池边缘流动,并测量304不锈钢TIG焊过程中熔池表面的液态金属流动速率为12 mm/s左右,Q235碳钢的熔池表面的流动速率为15 mm/s左右。

关键词: 表面示踪, 熔池镜面反射, 熔池流动行为, TIG焊

Abstract:

:In view of flow behavior about the Tungsten inert gas weld pool surface, the method of use tracer particles to track flow behavior of the weld pool surface is proposed. The new experiment system which contains a laser, a screen, a camera and a welding equipment is established. The screen capture the images about the weld pool surface and the tracer particles which are surface-swimming in the weld pool by mirror reflection of a laser on the surface of weld pool during tungsten inert gas(TIG) welding, at the same time, this changing images on the screen are recorded by charge coupled device(CCD) camera. Further, the flow behavior of weld pool surface between 304 stainless steel and Q235 carbon steel are researched during the TIG welding. The experiment data is analyzed to explore the surface flow law of weld pool during the TIG welding, and the speed algorithm of tracer particles is proposed. The results show that the two different flow behaviors of TIG weld pool exist in the TIG welding process. The liquid metal on the surface flows from the edge to the center of weld pool during the welding of stainless steel, while the surface flow is from the center to the edge of weld pool during the welding of carbon steel, and to determine the flow of liquid metal in the process of stainless steel TIG welding speed is about 12 mm/s, the liquid metal in the process of carbon steel TIG welding flow rate is about 15 mm/s.

Key words: pool surface mirror reflection, tracer method, weld pool flow behavior, TIG welding