COMPUTER SIMULATION OF NONMETAL INCLUTIONS CHEMICAL COMPOSITION IN WELD METAL

Volume 5, Issue 6, December 2021     |     PP. 95-113      |     PDF (1352 K)    |     Pub. Date: November 1, 2021
DOI: 10.54647/isss12168    96 Downloads     5810 Views  

Author(s)

Holovko V.V., Paton EWI, Kyiv, Ukraine
Taraborkin L.A., Paton EWI, Kyiv, Ukraine

Abstract
The physical-chemical model describing the formation of nonmetal inclusions in welded metal of mild and low alloyed steels was developed. Thermomechanical calculations of reactions, which took place in a welding pool and determined the structure of nonmetal inclusions, were fulfilled. On a basis of the simulation the hypothesis about two stages formation of the inclusions was put forward. The first stage was in liquid metal during the period before pool crystallization, while the second being in the zone of a solid-liquid phase, which existed some time around the inclusions in a post crystallization period.
The mathematical device for numerical estimation of the chemical composition of nonmetal inclusions in each stage of their formation was created. The algorithm for the numerical simulation of the content of oxygen in a nonmetal phase both in before crystallization period and in a post crystallization one was elaborated, as well as the algorithm of calculating the chemical composition of a nonmetal phase, which was condensed on a surface refractory oxides as on a substrate in a biphase zone.
The computer program was developed for predicting nonmetal inclusion composition in weld metal and carrying out the numerical simulation of the influence of oxygen and deoxidizing elements on the composition of nonmetal inclusions.
The developed computer program was tested on experimental weld metal data. For this purpose SAW welding with agglomerated fluxes of HSLA steels samples, which contained inclusions with various structures, sizes and character of distribution, was fulfilled. For the same welds the calculations of inclusions composition were performed by the developed program. It was established that the created program of forecasting the chemical composition of nonmetal inclusions adequately described inclusions in a wide range of values of oxygen flux potential and contents of deoxidizing elements in them.

Keywords
WELDING, LOWALLOY STEELS, WELD METAL, NONMETAL INCLUSIONS, COMPUTER SIMULATION, FORECASTING STRUCTURE

Cite this paper
Holovko V.V., Taraborkin L.A., COMPUTER SIMULATION OF NONMETAL INCLUTIONS CHEMICAL COMPOSITION IN WELD METAL , SCIREA Journal of Information Science and Systems Science. Volume 5, Issue 6, December 2021 | PP. 95-113. 10.54647/isss12168

References

[ 1 ] Раскисление углеродистых и низколегированных мартеновских сталей / Явойский В.И.,Тыонг В.М., Горохов Л.С. // Неметаллические включения в стали.- 1961.- т.1.- ñ.228
[ 2 ] Mechanisms of inclusion formation in Al-Ti-Si-Mn deoxidized steel weld metals / Kluken A.O/. Grong . //// Metallurgical transactions A.- Vol.20A.- N8.- 1989.- p.1335-1349.
[ 3 ] Metalurgie et properietes mecaniques du metal fondu en soudage multipasse sous flux d`acier au C-Mn micro-allie \ Devillers L., Kaplan D., Ribes A., Riboud P.V.\\ Memoires et etudes scientifiques revue de metallurgie.- 1986.- 83,N1.- p.43 - 62.
[ 4 ] Inclusion phases and the nucleation of acicular ferrite in submerged arc welds in high strength low alloy steels \Dowling J.M., Corbett J.M., Kerr H.W. \\ Metallurgical transactions.- 1986.- 17A,N10.- p.1611 - 1623.
[ 5 ] Weld metal solidification mechanics / Savage W.F., Lundin C.D., Aronson A.H. // Welding Journal .- 1965.- #4.- p.175s - 181s.
[ 6 ] Non-equlibrium behaviour of weld metal in flux-related processes / Olson D.L., Edwards G.R., Liu S., Matlick D.K. // Welding in the World .- 1993.- Vol.31 #2.- pp.142 - 154.
[ 7 ] Calculation of non-metallic inclusions formation process in solidification steel / Kazakov A.A., Prikhodovskij A.A. // In book «Perfection and automatization of steelmelting process» .- Magnitogorsk: MSMI.- 1989.- pp.15 - 22.
[ 8 ] Questions of non-metallic inclusions formation during steel crystallization / Petrovskij V.A., Volkov A.E., Borisov V.T. // Metals.- 1990.- #5.- pp.57 - 60.
[ 9 ] Thermodynamic of phases formation process in crystallizing alloys / Tanklevskaja N.M., Michajlov G.G. // Metals.- 1991.- #6.- pp.202 - 207.
[ 10 ] Solute redistribution during solidification with rapid solid state diffusion / Clyne T.W., Kurz W. // Metallurgical transactions A .- 1981.- Vol.12A.- #6.- pp.965 - 971.
[ 11 ] Fine oxide particles in mild steel CO2 weld metal \ Boniszewski T. \\ Welding journal.- 1972.- N1.- p.19s - 22s.
[ 12 ] Relationship between microstructure and mechanical properties of mild steel weld deposits \ Irvine K.J., Pickering F.B. \\ British welding journal.- 1960.- N5.- p.353 - 364.
[ 13 ] Inclusion formation in self-shielded flux cored arc welds / Quintana M., Mclane J.E. Babu S.S., David S.A. // Abstracts of papares. AWS meeting 1999. P.193-195.
[ 14 ] Effect of flux TiO2 and Ti content on tolerance to high Al content of submerged-arc welds made with basic fluxes \ Terashima H., Hart P.H.M. \\ Inter.conf. The effects of residual, impurity, and microalloying elements on weldability and weld properties., London - 15 - 17 Nov.1983.: Abington Cambridge, 1984.- p.P27-1 - P27-22.
[ 15 ] Chemical composition and cristal structure of oxide inclusions promoting acicular ferrite transformation in low alloy submerged arc weld metal \ Horii Y., Ichikawa K., Ohkita S., Funaki S., Yurioka N. \\ Quarterly jounal of Japan welding society.- 1995.- V.13,N4.- p.500 - 507.
[ 16 ] Martensite start temperature as a weldability index / Olson D.L., Liu S., Wang W., Pieters R.R.G.M., Ibarra S. // Trends in welding research. : Proceedings of the 4th International Conference. 5 – 8 June 1995, Gatilnburg, Tennessee, USA.- 1995.- p.615-620.
[ 17 ] О механизме влияния неметаллических включений на диффузию водорода в стали \ Князев А.А., Волков В.А., Чернуха Л.Г. \\ Металлы.- 1984.- N4.- с.43 - 49.
[ 18 ] Анализ напряженного состояния при выделении частиц фаз внедрения \ Шульга А.В., Никишанов В.В. \\ Металлы.- 1990.- N5.- с.128 - 134.
[ 19 ] Поведение неметаллических включений в условиях термо-деформационного передела стали \ Цивирко Э.И., Гонтаренко В.И., Бялик Г.А. \\ Изв.ВУЗов Черная металлургия.- 1992.- N2.- с.20 - 23.
[ 20 ] Кабанова О.В., Максимов Ю.А., Рузинов Л.П. Статистические методы построения физико-фимических моделей металлургических процессов. М.: Металлургия. 1989.
[ 21 ] Investigations of weld pool mean temperature / I.I.Frumin, I.K.Pokhodnya // Avtomaticheskaya svarka.- 1955.- #4.- pp.13 - 30.
[ 22 ] Erokhin A.A. The background of fusion welding. Physical-chemical behaviour. M.:Mashinostroenie.- 1973.- 448 p.
[ 23 ] Физико-химические расчеты электросталеплавильных процессов / Григорян В.А., Стомахин А.Я., Пономаренко А.Г. и др.- М.: Металлургия, 1989. 288с.
[ 24 ] Теория образования неметаллических включений в двухфазной зоне кристаллизующегося слитка / Борисов В.Т. // Неметаллические включения в стали.- 1961.- т.1.- с.71-87.