|
|
|
|
|
|
| The Effect of Electrode Polarity on Arc Plasma Spectral Characteristics of Self-Shielded Flux Cored Arc Welding |
| ZHANG Heng-ming1, SHI Yu1*, LI Chun-kai1, 2, 3, GU Yu-fen1, ZHU Ming1 |
1. State Key Laboratory of Advanced Processing and Reuse of Nonferrous Metals，Lanzhou University of Technology, Lanzhou
730050, China
2. Wenzhou Engineering Institute of Pump & Valve，Lanzhou University of Technology，Wenzhou 325100，China
3. College of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617，China
|
|
|
|
|
Abstract Owing to the wind resistance and excellent weld bead performance of self-shielded flux cored wire. It has been widely used in pipeline welding and the repair of large machinery in the field. Especially, electrode polarity has a great effect on the welding process. In order to study the influence mechanism of electrode polarity on arc plasma, a synchronous acquisition system was designed to scan each point in arc plasma space. Through the analysis of characteristic spectra lines, the Stark profile method was used to calculate the electron density, and the arc plasma temperature was calculated based on the Boltzmann mapping method. At the same time, the distribution characteristics of Al and Mg active elements were analyzed. The results show that electron density distribution, arc plasma temperature and active elements in the central area of the arc column were like the water drop along the negative direction of the Y axis in DCEN (direct current electrode negative). Under the DCEP (direct current electrode positive), the distribution characteristics of arc plasma electron density, arc temperature and active elements in the central area of the arc column were fingerlike. According to the principle of self-magnetic contraction, the electromagnetic force was less in the radial direction under DCEP, and the distribution of active elements was divergent. Under DCEP, the active elements are subjected to more electromagnetic force in the radial direction, and the shrinkage was serious. In addition, the arc plasma electron density and arc temperature in the center of the arc column were higher in DCEP than those under DCEN when the same electrical parameters were used. The distribution characteristics of electron density and ionization degree were the main factors affecting the arc plasma temperature. The arc plasma temperature and electron density were raised with the current and voltage increase under the same electrode polarity.
|
|
Received: 2021-06-13
Accepted: 2021-11-10
|
|
|
|
Corresponding Authors:
SHI Yu
E-mail: shiyu@lut.cn
|
|
[1] Liu H Y, Li Z X, Li H, et al. Science and Technology of Welding and Joining, 2013, 13(8): 777.
[2] Liu D, Liu R, Wei Y. Surface and Coatings Technology, 2012, 207: 579.
[3] Zhang T, Li Z, Kou S, et al. Materials Science and Engineering: A, 2015, 628: 332.
[4] Liu H Y, Li Z X, Li H, et al. Science and Technology of Welding and Joining, 2008, 13(8): 777.
[5] Souza D, de Resende A A, Scotti A. Welding International, 2010, 24(12): 934.
[6] Xue L, Wu J, Huang J, et al. Chinese Journal of Mechanical Engineering, 2016, 29(2): 351.
[7] Jia C, Zhang T, Maksimov S Y, et al. Journal of Materials Processing Technology, 2013, 213(8): 1370.
[8] LI Zhi-gang, ZHANG Shi-shuai, LIU De-jun, et al(李志刚, 张世帅, 刘德俊, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2021, 41(4): 1151.
[9] Zhang Z, Zhang F. Materials Transactions, 2009, 50(8): 1909.
[10] Hegazy H, AlAshkar E, Abou-Gabal H H, et al. IEEE Transactions on Plasma Science, 2014, 42(6): 1674.
[11] Kramida A, Ralchenko Y, Reader J, et al. NIST Atomic Spectra Database (ver. 5.1), [Online]. Available thttp[J]. physics.nist.gov/asd [2013, September 19]. National Institute of Standards and Technology, Gaithersburg, MD, 2013.
[12] Zhang H, Shi Y, Gu Y, et al. Journal of Manufacturing Processes, 2020, 58: 478.
[13] Chen S, Xu B, Jiang F. Acta Metall. Sin., 2017, 53(5): 631.
|
| [1] |
HUANG Shi-cheng1, HUANG Yi-ming1, 2*, YANG Li-jun1*, YUAN Jiong1, LIN Zhi-xiong1, ZHAO Xiao-yan1. Analysis of Inverted Y-Shaped Arc Photoelectricity Characteristic of
Flux-Cored Wire Pulsed TIG Additive Manufacturing[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(08): 2579-2586. |
| [2] |
ZHAO Xiao-yan1, YANG Li-jun2*, HUANG Yi-ming1,2*, HUANG Shi-cheng1, LI Wang1. Study on Arc Characteristic of Flux-Cored Wire Pulse TIG Arc Additive Manufacturing[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2021, 41(08): 2397-2403. |
| [3] |
XIAO Xiao1,2, LI Fang2*, HUA Xue-ming2, ZHANG Ke-ke1. Dynamic Diagnostic of Physical Property in P-TIG Argon-Nitrogen Shielded Arc Plasma with Optical Emission Spectrometry[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2019, 39(12): 3692-3697. |
| [4] |
JIANG Fan, LI Yuan-feng, CHEN Shu-jun*, LI Cheng. Analysis on Automatic Discrimination of High Temperature Based on Fowler-Milne Method[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2019, 39(02): 370-376. |
| [5] |
XU Chen1, 2, HUA Xue-ming1, 2*, YE Ding-jian1, 2, MA Xiao-li1, 2, LI Fang1, 2, HUANG Ye1, 2. Study of the Effect of Interference during Multi-Wire GMAW Based on Spectral Diagnosis Technique[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2018, 38(07): 1993-1997. |
| [6] |
LIU Ying1, YANG Li-jun1,2*, HE Tian-xi1, ZHAI Yong-lei1, LIU Tong1. The Spectral Analysis of TIG Welding Filled with Flux-Cored Wire[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(07): 2171-2176. |
| [7] |
LI Min1,2, ZHANG Wang1,2, CAO Lan1, HUA Xue-ming2,3, LI Fang2,3, PAN Cheng-gang2 . Experimental Study of the Diffusion Process of Pulsed-GMAW Plasma with Optical Emission Spectrometry [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(02): 527-531. |
| [8] |
ZHANG Wang1,2, LI Fang1,2*, LI Min3, HUA Xue-ming1,2, CAI Yan1,2 . Study of the Laser Absorption Characteristics of CO2 Laser-Pulsed GMAW Hybrid Welding Based on Spectral Diagnosis Technique [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(04): 913-918. |
| [9] |
DU Xiao1, YANG Li-jun1, 2*, LIU Tong1, JIAO Jiao1, WANG Hui-chao1 . The Spectral Analysis of Laser-Induced Plasma in Laser Welding with Various Protecting Conditions[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(01): 15-19. |
| [10] |
LIU Yong-qiang1, LI Huan1, YANG Li-jun1*, ZHENG Kai1, GAO Ying2 . Arc Spectrum Diagnostic and Heat Coupling Mechanism Analysis of Double Wire Pulsed MIG Welding[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2015, 35(01): 5-9. |
| [11] |
HUANG Yong1, 2，WANG Yan-lei2，ZHANG Zhi-guo2 . Impact of Introduction of O2 on the Welding Arc of Gas Pool Coupled Activating TIG[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(05): 1168-1172. |
| [12] |
LIAO Wei1,2, HUA Xue-ming1,2*, ZHANG Wang1,2, LI Fang1,2 . Study of the Effect of Heat Source Separation Distance on Plasma Physical Properties in Laser-Pulsed GMAW Hybrid Welding Based on Spectral Diagnosis Technique[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(05): 1173-1177. |
| [13] |
LIU Tong1, YANG Li-jun1, 2*, WANG Li-jun1, 2, WANG Lang-ping3 . A Comparative Analysis of the Passive Electric Probe Detection and Spectrum Diagnosis of Laser-Induced Plasma[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(02): 289-292. |
| [14] |
ZHENG Kai1, LI Huan1, YANG Li-jun1*, GU Xiao-yan1, GAO Ying2 . Plasma Temperature Calculation and Coupling Mechanism Analysis of Laser-Double Wire Hybrid Welding[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(04): 890-894. |
| [15] |
ZHANG Wang1, 2, HUA Xue-ming1, 2*, PAN Cheng-gang1, 2, LI Fang1, 2, WANG Min1, 2 . The Reconstruction of Welding Arc 3D Electron Density Distribution Based on Stark Broadening [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(10): 2601-2604. |
|
|
|
|
