Car body welding with micro-jet cooling

• Autorzy: Węgrzyn T. , Piwnik J. , Hadryś D. , Wieszała R.
• Języki publikacji: EN

Abstrakty

EN

Purpose: of that paper was analysing welding process with device to micro-jet cooling of weld joint during welding. The main reason of it was investigate possibilities of getting higher amount of desired phase acicular ferrite. High amount of acicular ferrite influences positively on high value of impact toughness. Increasing the value of impact toughness is particular importance when making repairs car body parts. It is necessary to determine the parameters of the micro-jet cooling so that you can introduce this method for widespread use. Design/methodology/approach: During research the chemical analysis, micrograph tests and Charpy V impact test of the metal weld deposit on pendulum machine were carried out. The Charpy V impact test was prepared according to standard ISO EN 148-1 Metallic materials - Charpy pendulum impact test - Part 1: Test method. Samples for impact testing were prepared according to standard ASTM A370. Findings: Micro-jet cooling of weld joint during welding could influence on amount of acicular ferrite in weld metal deposit (above 65%). This is unheard in other ways. Research limitations/implications: That research was made for MIG method only. Another method of welding was not tested. Other methods have not been tested, but it is suspected that similar phenomena are taking place. Practical implications: Micro-jet cooling it is way to get higher amount of acicular ferrite in weld metal deposit than the usual methods of welding. It is very important because it could be used to steering of weld joint structure and mechanical properties (for example impact toughness). Originality/value: In this research new method of cooling weld joint during welding was used. At the present time use of micro-jet cooling while MIG is in the testing phase and requires an accurate diagnosis. This method is very promising and capable of industrial application, mainly due to the significant improvement of weld quality and reduces costs.

Słowa kluczowe

EN

welding; micro-jet cooling; weld metal deposit; metallographic structure; acicular ferrite; impact toughness

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2011
• Tom: Vol. 49, nr 1
• Strony: 90--94
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Węgrzyn T.

• Silesian University of Technology, ul. Krasińskiego 8, 40-019 Katowice Poland

autor

Piwnik J.

• Bialystok University of Technology, ul. Wiejska 45A, 15-351 Białystok, Poland

autor

Hadryś D.

• Higher School of Labour Protection Management, ul. Bankowa 8, 40-007 Katowice, Poland

autor

Wieszała R.

• Silesian University of Technology, ul. Krasińskiego 8, 40-019 Katowice Poland

Bibliografia

• [1] P. Judson, D. Mc Keown, Advances in the control of weld metal toughness, Offshore welded structures proceedings, London, 1982.
• [2] T. Wegrzyn, J. Piwnik, P. Baranowski, A. Silva, M. Plata, Micro-jet welding for low oxygen process, Proceedings of the International Conference “Inovation and Development” ICEUBI’2011, Covilha, 2011.
• [3] A. Gruszczyk, J. Górka, Heterogeneity of chemical composition and the structure of welded joints and padding welded joints, Welding Technology Review 2 (2010) 3-6.
• [4] T. Węgrzyn, D. Hadryś, M. Miros, Optimization of operational properties of steel welded structures, Maintenance and Reliability 3 (2010) 30-33.
• [5] T. Węgrzyn, J. Mirosławski, A. Silva, D. Pinto, M. Miros, Oxide inclusions in steel welds of car body, Materials Science Forum 636-637 (2010) 585-591.
• [6] V.K. Goyal, P.K. Ghosh, J.S. Saini, Influence of pulse parameters on characteristics of bead-on-plate weld deposits of aluminium and its alloy in the pulsed gas metal arc welding process, Metallurgical and Materials Transactions A 39/13 (2008) 3260-3275.
• [7] T. Kasuya, Y. Hashiba, S. Ohkita, M. Fuji, Hydrogen distribution in multipass submerged arc weld metals, Science and Technology of Welding and Joining 6/4 (2001) 261-266.
• [8] K. Krasnowski, Influence of stress relief annealing on mechanical properties and fatigue strength of welded joints of thermo-mechanically rolled structural steel grade S420MC, Archives of Metallurgy and Materials 54/4 (2009) 1059-1072.
• [9] T. Węgrzyn, Mathematical equations of the influence of molybdenum and nitrogen in welds, Proceedings of the Conference of International Society of Offshore and Polar Engineers IS0PE'2002, Kita Kyushu, 2002.
• [10] T. Węgrzyn, Proposal of welding methods in terms of the amount of oxygen, Archives of Materials Science and Engineering 47/1 (2011) 57-61.
• [11] T. Węgrzyn, The classification of metal weld deposits in terms of the amount of oxygen, Proceedings of the Conference of International Society of Offshore and Polar Engineers ISOPE’99, Brest, France, 1999.
• [12] M. Adamiak, J. Górka, T. Kik, Structure analysis of welded joint of wear resistant plate and construction al steel, Archives of Materials Science and Engineering 46/2 (2010) 108-114.
• [13] A. Klimpel, J. Górka, Properties of chromium cast iron deposits SSA surfaced, Proceedings of the 14th International Scientific Conference “Achievements in Mechanical and Materials Engineering” AMME’2006, Gliwice-Wisła, 2006.
• [14] ISO 148-1 Metallic materials - Charpy pendulum impact test - Part 1: Test method.
• [15] ASTM A370 Standard test methods and definitions for mechanical testing of steel products.