CrMoV steel welding in the narrow gap using of SAW technology

• Autorzy: Holub L. , Dunovský J. , Suchánek J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: of this paper is the verification of multi-layer SAW welding the raw material “1.6946” by different welding consumables (TOPCORE 838 B, Thermatit MTS 616) in the „ultra” narrow gap using the prescribed temperature cycle and subsequent heat treatment. Design/methodology/approach: An evaluation of the mechanical properties of the test for both types welding consumables. The measured values of yield strength and the tensile strength exhibit comparable properties to the RAW material “Inspection Certificate” for welding consumable “TOPCORE 838 B”. Findings: Thermatit MTS 616” was found falling below the specified values of impact energy, ductility. The welding consumable TOPCORE 838 B shows less susceptibility to the brittleness. Based on the results will be verified by the existence of internal structures arising using the microstructure analysis & ARA diagram of the base material 1.6496. Research limitations/implications: Obtained results will be subsequently verified the existence of internal generated microstructures using the ARA chart of the base material (W Nr. 1.6496) for the future design of the new temperature cycles in all phases of the production. Originality/value: The welding consumable “TOPCORE 838 B” showed the low tendency to embrittlement in the heat-affected zone using the defined heat treatment. On the basic of the examination the welding consumable “TOPCORE 838 B” can be recommended to be used for the welding process, thermal cycle and heat treatment.

Słowa kluczowe

EN

SAW; narrow gap; CrMoV steel; rotor; impact toughness; strength; heat treatment; heat-affected zone; hot cracks; cold cracks

PL

wąska szczelina; stal Cr-Mo-V; wirnik; udarność; wytrzymałość; obróbka cieplna; strefa wpływu ciepła; gorące pęknięcia; zimne pęknięcia

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2014
• Tom: Vol. 62, nr 1
• Strony: 31--37
• Opis fizyczny: Bibliogr. 14 poz., tab.

Twórcy

autor

Holub L.

• Ústav strojírenské technologie, Fakulta Strojní, ČVUT v Praze, Technická 4, 16607, Praha 6, Czech Republic

autor

Dunovský J.

• Ústav dopravní techniky, Fakulta dopravní, ČVUT v Praze, Konvitkská 20, 110 00, Praha 1, Czech Republic

autor

Suchánek J.

• Ústav strojírenské technologie, Fakulta Strojní, ČVUT v Praze, Technická 4, 16607, Praha 6, Czech Republic

Bibliografia

• [1] Siemens industrial turbomachinery: MPO FR-TI1/485 report, Prague, 2009.
• [2] M. Slováček, Vřesová Rotor ́s Welding, MECAS ESI, Brno, 2007.
• [3] Z. Keltner, Very narrow gag welding of the circumferential welds, Konstrukce, 2011.
• [4] Bohler-Uddeholm.cz, BTSGD, Germany, 2005, http://www.bohleruddeholm.cz.
• [5] E. Folková, P. Hránek, J. Štumbauer, Rotor ́s surfacing in Skoda Power SA.: Hradec nad Moravicí, Metal, 2006.
• [6] J.B. Leblond, D. Pont, J. Devaux, J.M. Bergheau, Metallurgical and mechanical consequences of phase transformations in numerical simulations of welding processes, in: L. Karlsson (ed.) Modeling in Welding, Hot Powder Forming and Casting, Chapter: 4, ASM International, 2003, 61-89.
• [7] ESAB, SAW Guidelines: Technical procedure, reg. no.: A00136020, 2009.
• [8] J. Martinec, A. Plíhal, O. Sovák, Ways of improving the productivity of the submerged arc welding – ICE™ – project, Konstrukce, 2012.
• [9] D. Séférian, Metal Guideline of the welded parts, SNTL, Praha, 1962.
• [10] Q. Chen, G. Schenffknecht, Boiler design and materiáls aspects for advanced steam power plants, in: Proceeding of COST Programme part II: Materials for Advanced Power Engineering, 2002.
• [11] M. Kolaříková, L. Kolařík, K. Kovanda, R. Hrabina, Welding of Normalized Heat Treated Steels S355NL Large Thicknesses by Method FCAW, Manufacturing Technology 13/2 (2013) 181-188.
• [12] L. Kolařík, M. Kolaříková, P. Vondrouš, The Choice Parameters for Welding of Steel S355NL, Proceedings of the 23rd International DAAAM Symposium. Vienna, 2012, 1027-1030.
• [13] L. Kolařík, K. Kovanda, M. Kolaříková, P. Vondrouš, J. Kopřiva, Influence of Shielding Gas on GMA Welding of Al Alloys. MM Science Journal 4 (2013) 452-455.
• [14] L. Kolařík, M. Kolaříková, K. Kovanda, M. Pantuček, P. Vondrouš, Advanced Functions of a Modern Power Source for GMAW Welding of Steel, Acta Polytechnica 52/4 (2012) 83-88.