Welding of MART steel with the use of matching fillers

• Autorzy: Matkowski P. , Nowacki J. , Sajek A.
• Języki publikacji: EN

Abstrakty

EN

Purpose: This paper attempts to determine the influence of using fillers of various kinds on strength of a welded joint of MART steel depending on the amount of heat supplied. Design/methodology/approach: Test welded joints were made of S1100QL steel with GMAW method, and using different fillers as well as different values of supplied heat. The tests were designed in such a way so as to demonstrate the prospected interdependencies as clearly as possible. Macroscopic examination was carried out, Vickers hardness, impact strength and tensile strength were measured, and technological bend test was conducted on the joint. Findings: Significant differences between the joints obtained resulting from the fillers used and welding parameters applied were noticed. The strength of a joint is lower than that of welded steel, it concentrates in the weld and is similar to the strength of parent material. Research limitations/implications: Conducting research concentrating on welding using particular filler in a wider range of heat supplied would make it possible to obtain more precise results. By delineating the interdependencies between strength parameters, it would be possible to optimise the mechanical properties of welded joints made of MART steels. It would require the employment of automated welding that allows for unrestricted and stable control of parameters. Practical implications: The conditions for making a proper joint of S1100QL steel were determined. Reasons were given for the choice of joint testing methodology and the purposefulness of comprehensive tests of joint parameters. The need for changing test procedures in order to eliminate the causes of inappropriate evaluation was manifested. The influence of automation as an important factor that determines the fulfilment of strict parameter regime of joint formation was emphasised. Determination of the interrelations between mechanical properties of a joint and welding parameters applied would allow to conduct a welding process in such a way so as to obtain a joint of desired usefulness in given technological conditions. Originality/value: Problems associated with welding of S1100QL steel with the use of filler metals of matching materials were defined and possible solutions for these problems were presented. The mechanism of welding thermal cycle influencing structural changes in the joint that result from the complex cycle of hardening and tempering was demonstrated.

Słowa kluczowe

EN

GMAW; high strength steel; MART steel; S1100QL; testing procedures; heat treatment

PL

GMAW; stal wysokiej wytrzymałości; stal MART; S1100QL; procedury badawcze; obróbka cieplna

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2014
• Tom: Vol. 70, nr 2
• Strony: 77--86
• Opis fizyczny: Bibliogr. 29 poz.

Twórcy

autor

Matkowski P.

• Teleskop Sp. z o.o., ul. Belgijska 5, 66-470 Kostrzyn nad Odra, Poland

autor

Nowacki J.

• ZUT w Szczecinie, Al. Piastow 19, 70-310 Szczecin, Polska

autor

Sajek A.

• ZUT w Szczecinie, Al. Piastow 19, 70-310 Szczecin, Polska

Bibliografia

• [1] S.M. Węglowski, Modern toughened steels – their properties and advantages, Welding Institute Bulletin 2 (2012) 25-36.
• [2] S. Keeler, M. Kimchi, Advanced High-Strength Steels Application Guidelines Version 5.0, World Auto Steel, 2014.
• [3] Dillinger Hutte GTS, Dillimax Technical Information, 3/2007, Information brochure from the website of the company.
• [4] Ilsenburger Grobblech GmbH, Salzgiter Gruppe, Maxil 960, Material brochure, 2012.
• [5] Arcelor Mittal, SuperElso 960, Material brochure, 2012.
• [6] M.Łomozik, S.M. Węglowski, M. Zeman, Weldability of toughening steel with a yield strength above 1000 MPa, Summary of statutory research funded by the Institute of Welding MNiSW, 2012 (in Polish).
• [7] J. Górka, Thermo-mechanically treated steel S700MC and its weldability, Welding Institute Bulletin 6 (2012) 38-45 (in Polish).
• [8] W. Ozgowicz, E. Kalinowska-Ozgowicz, Investigations on the impact strength of constructional high-strength Weldox steel at lowered temperature, Archives of Materials Science and Engineering 32/2 (2008) 89-94.
• [9] SSAB, Welding of Domex - advanced high strength steels, 2013, Information brochure from the website of the company.
• [10] A. Holzner, Welding structural high-strength fine-grained steel by MAG method using flux cored, Overview of Welding 4 (2011) 39-48 (in Polish).
• [11] K. Makles, Weldability and selected properties of quenched and tempered steel welds, Overview of Welding 8 (2014) 19-25 (in Polish).
• [12] R. Jastrzębski, R. Karcz, W. Kiełczyński, A. Kloc, Welding of high-strength steels - I, Design and construction engineering 7-8 (2013) (in Polish).
• [13] SSAB, Welding Hardox and Weldox, 2010, Information brochure from the website of the company.
• [14] P. Nevasmaa, Prevention of weld metal hydrogen cracking in high strength multipass welds. Welding in the World 48/5-6 (2004) 2-18.
• [15] SSAB, Docol DP/DL – Cold reduced dual phase steels, 2014, Information brochure from company products catalogue.
• [16] VoestalpineBohler Welding, Filler Metals Bestseller for Joining Applications, 09.2013, Company products catalogue.
• [17] Hermann Fliess & Co. GmbH, Production Program, 2013, Company products catalogue.
• [18] Filtech Welding, Filtech, 2013, Company products catalogue.
• [19] Air Liquide Welding, Oerlikon, 2013, Company products catalogue.
• [20] Ceweld Nederland B.V., Products Catalog, 2015, Company products catalogue.
• [21] RautaRuukki, Selection of welding consumables for hot-rolled steel plates, plates and coils, 2013, Information brochure from the website of the company.
• [22] Drahtzug Stein, Welding consumables, 2013, Company products catalogue.
• [23] Elga, Welding consumables, 2007, Company products catalogue.
• [24] ESAB, Welding materials, 2012, Company products catalogue.
• [25] Filarc, Filarc flux- and metal-cored welding wires, 2001, Company products catalogue.
• [26] P. Adamiec, J. Pilarczyk, Welding conditions of steels produced by the Polish steel industry, Akcydens publishing house, Warsaw, 1981 (in Polish).
• [27] M.H. Kolstein, O.D. Dijkstra, Tests on welded connections made of high strength steel up to 1100 MPa. Welding in the World 50/8-9 (2006) 512-519.
• [28] M. Pitrun, D. Nolan, D. Dunne, Correlation of welding parameters and diffusible hydrogen content in rutile flux-cored arc welds. Australian Welding Journal 49/1 (2004) 33-46.
• [29] PN-EN ISO 5173:2010 — Destructive tests on welds in metallic materials — Bend tests.