Experimental study of arc bubble growth and detachment from underwater wet FCAW
Tóm tắt
The bubble around the arc burning zone, defined as arc bubble, is the key factor to affect the process stability and joint quality in underwater wet welding. In this study, visual sensing of the bubble growth and detachment based on a high-speed camera in conjunction with a dysprosium lamp was realized. The extracted boundaries of a growing arc bubble were obtained via an image processing of the captured raw images. The bubble geometries were then calculated and determined. The relationships between the bubble geometries and welding heat input were experimentally investigated. Three distinct stages, including the formative stage, the elongation stage, and the detachment stage, were defined to describe the bubble growth along with a neck’s evolution. The variation trends of bubble geometries under different heat inputs were discussed to elucidate the bubble dynamic effect. For underwater wet welding, this provides a new orientation to promote the development of wet welding technology by sensing bubble growth.
Tài liệu tham khảo
Rowe MD, Liu S (2001) Recent developments in underwater wet welding. Sci Technol Weld Join 6(6):387–396
Teng J, Wang D, Wang Z, Zhang X, Li Y, Cao J, Xu W, Yang F (2017) Repair of arc welded DH36 joint by underwater friction stitch welding. Mater Des 118:266–278
Łabanowski J, Fydrych D, Rogalski G (2009) Underwater welding - a review. Adv Mater Sci 8(3):11–22
Guo N, Du Y, Maksimov S, Feng J, Yin Z, Krazhanovskyi D, Fu Y (2017) Study of metal transfer control in underwater wet FCAW using pulsed wire feed method. Weld World 62:87–94. https://doi.org/10.1007/s40194-017-0497-y
Perez F, Liu S (2005) Maintenance and repair welding in the open sea. Weld J 84(11):54–59
Maksimov SY (2010) Underwater arc welding of higher strength low-alloy steels. Weld Int 24(6):449–454
Jia C, Zhang Y, Zhao B, Hu J, Wu C (2016) Visual sensing of the physical process during underwater wet FCAW. Weld J 95(6):202–209
Tsai CL, Masubuchi K (1979) Mechanisms of rapid cooling in underwater welding. Appl Ocean Res 1(2):99–110
Guo N, Fu Y, Feng J, Du Y, Deng Z, Wang M, Tang D (2016) Classification of metal transfer mode in underwater wet welding. Weld J 95(4):133–140
Guo N, Wang M, Du Y, Guo W, Feng J (2015) Metal transfer in underwater flux-cored wire wet welding at shallow water depth. Mater Lett 144:90–92
Guo N, Fu Y, Wang Y, Du Y, Feng J, Deng Z (2017) Effects of welding velocity on metal transfer mode and weld morphology in underwater flux-cored wire welding. J Mater Process Technol 239:103–112
Feng J, Wang J, Sun Q, Zhao H, Wu L, Xu P (2017) Investigation on dynamic behaviors of bubble evolution in underwater wet flux-cored arc welding. J Manuf Process 28:156–167
Guo N, Xu CS, Guo W, Du YP, Feng JC (2015) Characterization of spatter in underwater wet welding by X-ray transmission method. Mater Des 85:156–161
Guo N, Du Y, Feng J, Guo W, Deng Z (2015) Study of underwater wet welding stability using an X-ray transmission method. J Mater Process Technol 225:133–138
Oliveira FDR, Soares WR, Bracarense AQ (2015) Study correlating the bubble phenomenon and electrical signals in underwater wet welding with covered electrodes. Weld Int 29(5):363–371
Guo N, Xu C, Du Y, Wang M, Feng J, Deng ZQ, Tang DY (2016) Effect of boric acid concentration on the arc stability in underwater wet welding. J Mater Process Technol 229:244–252
Fydrych D, Rogalski G (2013) Effect of underwater local cavity welding method conditions on diffusible hydrogen content in deposited metal. Weld Int 27(3):196–202
Lin Y, Song B, Song T (1981) A study and application of local dry CO2 gas shielded semi-automatic underwater welding. Trans China Weld Inst 2(1):9–20
Wang L, Xie F, Feng Y, Wang Z (2017) Innovative methodology and database for underwater robot repair welding: a technical note. ISIJ Int 57:203–205. https://doi.org/10.2355/isijinternational.ISIJINT-2016-407
Zhang X, Ashida E, Shono S, Matsuda F (2006) Effect of shielding conditions of local dry cavity on weld quality in underwater Nd:YAG laser welding. J Mater Process Technol 174(1):34–41
Meng Y, Shen X, Liu S, Huang S (2000) A new method on avoiding HAZ cold cracks of steel underwater wet welding. New Technol New Process 6:29–30
Meng Y, Liu S, Huang S (1998) HAZ cold cracks of 16Mn steel underwater wet welding. Weld Join 12:10–13
Clukey DA (1999) Evaluation and analysis of underwater wet welding process. Master thesis, The Ohio State University, Columbus, Ohio
Sun QJ, Cheng WQ, Liu YB, Wang JF, Feng JC (2016) Microstructure and mechanical properties of ultrasonic assisted underwater wet welding joints. Mater Des 103:63–70
Wu LJ, Liu YB, Cheng WQ, Sun QJ, Wang JF (2016) Ultrasound-assisted underwater wet welding process. Trans China Weld Inst 37(12):33–36
Bari SD, Robinson AJ (2013) Experimental study of gas injected bubble growth from submerged orifices. Exp Thermal Fluid Sci 44:124–137
Vafaei S, Angeli P, Wen DS (2011) Bubble growth rate from stainless steel substrate and needle nozzles. Colloid Surface A 384:240–247
Jia C, Hu J, Du Y, Zhang G, Zhao B (2014) Visual sensing of welding arc and metal transfer during underwater FCAW. Proceedings of the 19th National Welding Conference of China Welding Society, China
Jia C, Zhang T, Maksimov SY, Yuan X (2013) Spectroscopic analysis of the arc plasma of underwater wet flux-cored arc welding. J Mater Process Technol 213(8):1370–1377
Wang J, Sun Q, Zhang S, Wang C, Wu L, Feng J (2018) Characterization of the underwater welding arc bubble through a visual sensing method. J Mater Process Technol 251:95–108