Global Nuclear Safety
National Research Nuclear University "MEPhI"
online version: ISSN 2499-9733
print version: ISSN 2305-414Х
2017-2(23)
Design, manufacturing and commissioning of nuclear industry equipment
| Article Name | Study of Mass Transfer in Welding Tub |
|---|---|
| Authors | V.F. Cubarew |
| Address | National Research University «MPEI», |
| Abstract | The mass transfer at the melting front of the welding tub is evaluated when welding with butt joint non-consumable electrode of low-alloy steels 4-10 mm thick. The problem of undercutting on the seam face is one of the main problems of weld formation when welding with a consumable electrode at high speeds. It became necessary to model the mass transfer process from the head to the tail part of the welding tub taking into account all the basic forces affecting the metal movement. The evaluation was carried out using a flat tub model. The melting process was simulated by blowing the metal mass through the fusion front in the coordinate system connected with the arc. Evaluation of significant forces was made using similarity criteria. It was found out that the main forces are gravity forces, electrodynamics forces, arc pressure on the molten metal surface. The proposed model of the tub differs in principle from existing models (the variability of the melt flow along the length of the front, the distribution of forces over the surface and the volume of the melt, the possibility of calculating the change in the melt velocity along the length of the fusion front). |
| Keywords | welding tub, metal consumption, electrodynamics force density, melt, arc pressure, metal movement speed |
| Language | Russian |
| References | [1] Levich V.G. Fiziko-khimicheskaia gidrodinamika [Physical and Chemical Hydrodynamics]. M. Pub. Fizmatgiz [Physmatgiz], 1959, 699 p. (in Russian) [2] Kubarev V.F. etc. Gidrodinamicheskie protsessy v svarochnoi vanne [Hydrodynamic Processes in the Welding Tub]. Izvestiia vuzov. Mashinostroenie [News of Higher Education Institutions. Mechanical Engineering], 1979, №5, ISSN 0536-1044, pp. 119–123. (in Russian) [3] Kubarev V.F. Issledovanie fizicheskikh protsessov vzaimodeistviia elektricheskoi svarochnoi dugi s metallom i otsenka vozmozhnostei upravleniia formoobrazovaniem shva [Research of Physical Processes of Electric Welding Arc Interaction with Metal and Management Opportunity Assessment of Seam Shaping]. Dissertatsiya na soiskanie uchenoy stepeni kandidata tekhnicheskikh nauk [PhD Thesis in Engineering]. M. 1979. 179 p. (in Russian) [4] Prokhorov N.N. Fizicheskie protsessy v metallakh pri svarke [Physical Processes in Metals when Welding]. M. Pub. Metallurgiya [Metallurgy], 1968. 694 p. (in Russian) [5] Iudaev B.N., Mikhailov M.S., Savin V.K. Teploobmen pri vzaimodeistvii strui s pregradami [Heat Exchange at Interaction of Streams with Barriers]. M. Pub. Mashinostroenie [Mechanical Engineering], 1977, 246 p. (in Russian) |
| Papers | 56 - 61 |
| URL Article | URL Article |
| Open Article |