Identification of precipitations in anodically dissolved high-strength microalloyed Weldox steels

• Autorzy: Ozgowicz W. , Kurc A. , Nawrat G.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of the investigations is to elaborate the optimum conditions of anodic dissolutions from highstrength microalloyed Weldox steels in order to obtain indispensable quantities of electrolytic extractions and to identify them by X-ray phase analysis. Design/methodology/approach: Anodic dissolution of steel was carried out according to the potentiostatic method. In the X-ray qualitative analysis the comparative method was applied. The corrosion resistance of steels was determined by means of the first method of Stern - Tafel. Findings: The activity of anodic dissolution of the investigated steel was determined in various solutions of electrolytes with different pH and a different complexive affect versus iron. Practical implications: It has been found that the application of an optimal reagent for the anodic dissolution of Weldox Steel and of the chronopotentriometric method permit to get the required mass of electrolytic extraction for the qualitative X-ray phase analysis. Electrochemical investigations permitted also to assess preliminarily the corrosion resistance of the investigated steels. Originality/value: It has been found that there exists a distinct relation between the mass of electrolytic extractions and the kind of the dissolved precipitation and the value of the electrochemical potential of the anodic dissolution of steel, which affects essentially the result of the X-ray phase analysis. Besides, a high corrosion resistance of the investigated steels to the destructive effect of a saline environment and a low resistance to an acid environment have been detected.

Słowa kluczowe

EN

metallic alloys; microalloyed constructional steels; anodic dissolution; X-ray phase analysis; corrosion resistance

PL

stopy metaliczne; stal mikrostopowa; stal konstrukcyjna; roztwarzanie anodowe; analiza rentgenowska fazowa; odporność korozyjna

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2008
• Tom: Vol. 31, nr 2
• Strony: 95--100
• Opis fizyczny: Bibliogr. 22 poz.

Twórcy

autor

Ozgowicz W.

autor

Kurc A.

autor

Nawrat G.

• 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] J. Adamczyk, Development of the microalloyed constructional steels, Journal of Achievements in Materials and Manufacturing Engineering 14 (2006) 9-20.
• [2] J. Adamczyk, A.Grajcar, Heat treatment and mechanical properties of low-carbon steel with dual-phase microstructure, Journal of Achievements in Materials and Manufacturing Engineering 20 (2007) 13-20.
• [3] J. Adamczyk, Engineering of metallic materials, The Silesian University of Technology Publishing House, Gliwice, 2004 (in Polish).
• [4] M. Korchynsky, A new role for microalloyed steels-adding economic value, Proceedings of the 9th International Ferro Alloy Conference Infacon 9, Quebec City,2001.
• [5] J.M. Gray, A.J. DeArdo, Proceedings of the International Conference "HSLA Steels: Metallurgy and Applications", Ohio, 1985, 557-566.
• [6] E. Keehan, Effect of microstructure on mechanical properties of HSLA steel, Thesis for the degree of doctor of technology, Göteborg University of Technology, Sweden, 2004.
• [7] T. Maki In: K.A. Taylor, S.W. Thompson, F.B. Fletch, Physical Metallurgy of Direct-Quenched Steels, Proceedings of the International Conference TMS, Warrendale, 1993, 3-16.
• [8] J. Adamczyk, M. Opiela, Engineering of forged products of microalloyed constructional steels, Journal of Achievements in Materials and Manufacturing Engineering 15 (2006) 153-158.
• [9] A.J. DeArdo, Modern thermomechanical processing of microalloyed steel: A physical metallurgy perspective, Proceedings of the International Conference "Microalloying'95", Pittsburgh, 1995, 15-33.
• [10] T. Gladman, The Physical Metallurgy of Microalloyed Steel, Institute of Materials, London, 1997.
• [11] H.K.D.H. Bhadeshia, High-Strength Steels, Institute of Materials, London, (1992), 25-74.
• [12] 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.
• [13] K. Hasegawa, K. Kawamura, T. Urabe, Effects of Microstructure on Stretch-flange-formability of 980 MPa Grade Cold-rolled Ultra High Strength Steel Sheets, ISIJ International 44/3 (2004) 603-609.
• [14] J. Adamczyk, W. Krukiewicz, Influence of the tempering temperature on the stress corrosion cracking of the toughening microalloyed Weldox 900T steel, Journal of Achievements in Materials and Manufacturing Engineering 10 (2001) 637-640 (in Polish).
• [15] R. Venkataraman, A.Elbella, Numerical Investigation on the Impact Strength Properties of Weldox Steel, Technical publication of Bradley University (2004) 24-32.
• [16] N. Bagotsky, Fundamentals of Electrochemistry, John Wiley&Sons, New Jersey, 2005.
• [17] A. Kisza, Electrochemistry, WNT, Warsaw, 2001.
• [18] W. Ozgowicz, G. Nawrat, Electrolytic extractions obtained from Cu-Zr and Cu-Ce alloys and their X-ray phase analysis, Journal of Achievements in Materials and Manufacturing Engineering 20 (2007) 171-174.
• [19] Z. Szklarska-Smialowsk, Pitting Corrosion of Metals, NACE, Houston, 1986.
• [20] L. Kolditz, The Inorganic chemistry Vol. 2, PWN, Warsaw, 1994.
• [21] G. Nawrat, W. Simka, Influence of anode material on electrochemical decomposition of urea, Electrochemica Acta 52/18 (2007) 5696-5703.
• [22] A. Cygański, Basis electroanalytical methods, WNT, Warsaw, 1999