Investigations on the impact strength of constructional high-strength Weldox steel at lowered temperature

• Autorzy: Ozgowicz W. , Kalinowska-Ozgowicz K.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The paper presents the results of investigations concerning the impact strength of thick steel plates at lowered temperature obtained by industrial smelting of micro-alloyed steel of the type S1100QL (Weldox 1100) and S1300QL (Weldox 1300) with a yield strength of 1100-1300 MPa. Design/methodology/approach: The main methods used for these researches were the impact test Charpy V at lower temperatures, and metallographic observations. The tested samples at lower temperature have also been analyzed fractographically. Findings: The influence of the chemical composition and technology of production on the structure and mechanical properties of the investigated kinds of steels have been determined, as well as their ductility temperature of transition into the brittle state. Research limitations/implications: A large dispersion of intermetallic precipitated phases restricted considerably the possibility of their metallographic identification. This latter one will be done in the next stage of basic investigations. Practical implications: A wide range of practical applications of Weldox 1100 and Weldox 1300 sheet plates is warranted by both their high impact strength, especially at lower temperatures, and lower ductility transition temperature. Originality/value: It has been found that the degree of refinement of the martensitic structure and dispersion of secondary precipitations, mainly carbides and niobium nitrocarbides affect considerably the change of the impact strength within the investigated range of temperature from ambient temperature to minus 150°C.

Słowa kluczowe

EN

metallic alloys; high strength steel; micro-alloyed steel; mechanical properties; notched impact toughness; ductility transition temperature

PL

stopy metaliczne; stal wysokiej wytrzymałości; właściwości mechaniczne; udarność; temperatura przejścia

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2008
• Tom: Vol. 32, nr 2
• Strony: 89--94
• Opis fizyczny: Bibliogr. 17 poz.

Twórcy

autor

Ozgowicz W.

autor

Kalinowska-Ozgowicz K.

• Division of Constructional and Special Materials Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland,

Bibliografia

• [1] M. Korchynsky, Advanced Metallic Structural Materials and a New Role for Microalloyed Steels, Materials Science Forum 500-501 (2005) 471-480.
• [2] J. Gozzi, Plastic behavior of steel, Licenciate thesis Lulea University of Technology, Sweden (2004).
• [3] J. Adamczyk, M. Opiela, Engineering of some metallurgical products of microalloyed structural steels, Journal of Achievements in Materials and Manufacturing Engineering 18 (2006) 153-158.
• [4] J. Xiong, R. Shenoi, Fatigue and fracture, Proseedings of the 16th International Ship and Offshore Structure Congress, Southhampton, 2006, 445-527.
• [5] M. Jahazi, B. Eghbali, The influence of the hot forging conditions on the microstructure and mechanical properties of two microalloyed steels, Journal of Materials Processing Technology 113 (2001) 594-598.
• [6] J. Adamczyk, Engineering of Metallic Materials, The Silesian University of Technology Publishers, Gliwice, 2004 (in Polish).
• [7] E. Keehan, Effect of microstructure on mechanical properties of HSLA steels, Thesis for the degree of doctor of science of technology, Göteborg University of Technology, Sweden, 2004.
• [8] Offering list of the original firm SSAB Oxelösund, 2007.
• [9] H. Hummel, R. Oertl, W. Gundel, Innenbetriebliche Schweiβrichtlinien ISRB010, Liebherr-Werk Ehingen, 2005.
• [10] SSAB- Swedish Steel, LWE- Zulieferantenseminar Prag, 2007.
• [11] A. Bator, J. Majta, Structure and mechanical properties of microalloyed steel after plastic deformation in dual phases, Metallurgy-Metallurgical Engineering News 3 (2003) 402-408, (in Polish).
• [12] J. Pekko, Effects of non-metallic inclusions on fatigue properties of calcium treated steels, Dissertation for the degree of doctor of science of technology, Helsinki University of Technology, Espoo, Finland, 10th December (2004).
• [13] M. Opiela, Production of thick sheets from Cr-Mo steels with microadditives Nb, Ti, V and B by the thermomechanical-treatment, Metallurgy-Metallurgical Engineering News 72 (2005) 388-394, (in Polish).
• [14] A.D. Rollett, Martensitic Transformations, Bradley University, Illinois, United States, 2002.
• [15] I. Barsoum, Ductile failure and rupture mechanisms in combined tension and shear, Licenciate thesis, KTH Solid Mechanics, Stockholm Sweden, 2006.
• [16] M. Blicharski, Materials engineering, Publishers Science - Technical Series, Warsaw, 2004, (in Polish).
• [17] R. Venkataraman, Numerical Investigation on the Impact Strength Properties of Weldox Steel, Technical publication, Bradley University, Illinois, United States, 2004.