Innovative PM duplex stainless steels obtained basing on the Schaeffler diagram

• Autorzy: Dobrzański L. , Brytan Z. , Actis Grande M. , Rosso M.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The purpose of this paper was to describe the sintered duplex stainless steels manufactured in sinterhardening process and its usability in field of stainless steels and moreover using computer software to calculate the powder mix composition. Design/methodology/approach: In presented paper duplex stainless steels were obtained through powder metallurgy starting from austenitic or ferritic base powders by controlled addition of alloying elements powder. In the studies besides the preparation of powder mixes, computer software based on Schaeffler’s diagram was studied. Findings: It has been demonstrated that austenitic-ferritic microstructures with regular arrangement of both phases and absence of precipitates can be obtained with properly designed powder mix composition and sintering cycle. Research limitations/implications: According to the alloys characteristic applied cooling rate and powder mix composition seems to be a good compromise to obtain balanced duplex stainless steel microstructures, nevertheless further tests should be carried out in order to examine different cooling rates and sintering parameters. Practical implications: Applied producing method of sintered duplex steels and used sintering cycle as well as developed computer software to calculating powder mix composition proves his advantage in case of obtained microstructures and additionally it seem to be very promising for obtaining a balanced duplex structure, also working with cycles easy to be introduced in industries. Originality/value: The utilization of sinter-hardening process combined with use of elemental powders added to a stainless steel base powder shows its advantages in terms of good microstructural homogeneity and especially working with cycles possible to introduce in industrial practice.

Słowa kluczowe

EN

sinter-hardening; powder metallurgy; duplex stainless steel; schaeffler diagram

PL

obróbka typu sinter-hardening; metalurgia proszków; stal duplex; diagram Schaefflera

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2008
• Tom: Vol. 30, nr 1
• Strony: 49--52
• Opis fizyczny: Bibliogr. 15 poz.

Twórcy

autor

Dobrzański L.

autor

Brytan Z.

autor

Actis Grande M.

autor

Rosso M.

• Division of Materials Processing Technology, Management and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials,Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland,

Bibliografia

• [1] P.K. Samal, J.B. Terrell, Mechanical properties improvement of PM 400 series stainless steels via nickel addition, Metal Powder Report 1 (2001) 28-34.
• [2] A.J. Rawlings, H.M. Kopech, H.G. Rutz, The effect of service temperature on the properties of ferritic P/M stainless steels, Proceedings of the International Conference on Powder Metallurgy & Particulate Materials PM2TEC’97, Chicago USA, 1997, 33-40.
• [3] M. Rosso, M. Actis Grande, D. Ornato, Sintering of duplex stainless steels and their properties, Powder Metallurgy Progress 2 (2002) 10-17.
• [4] W. Brian James, What is sinter-hardening, Proceedings of International Conference on Powder Metallurgy & Particulate Materials PM2TEC’98, Las Vegas, Nevada USA, 1998, 55-60.
• [5] M. Campos, A. Bautista, D. Caceres, J. Abenojar, J.M. Torralba, Study of the interfaces between austenite and ferrite grains in P/M duplex stainless steels, Journal of the European Ceramic Society 23 (2003) 2813-2819.
• [6] P. Datta, G.S. Upadhyaya, Sintered duplex stainless steels, from premixes of 316L and 434L powders, Materials Chemistry and Physics 67 (2001) 234-242.
• [7] J. Kazior, T. Pieczonka, A. Molinari, Properties of AISI 316L, AISI 434L and duplex stainless steel, Proceedings of the 8th Scientific Conference „Achievements in Mechanical and Material Engineering” AMME’1999, Gliwice – Paw owice – Rydzyna – Rokosowo, 1999, 289-293.
• [8] M. Campos, P. Sarasola, J.M. Torralba, Sintering evolution of duplex stainless steels obtained from austenitic and ferritic stainless steels powders mixtures, Proceedings of the 9th Scientific Conference „Achievements in Mechanical and Material Engineering”, AMME’2000, Gliwice – Sopot –Gdańsk, 2000, 83-86.
• [9] L.A. Dobrzański, Z. Brytan, M. Actis Grande, M. Rosso, E.J. Pallavicini, Properties of vacuum sintered Duplex Stainless Steels, Journal of Materials Processing Technology 157-158 (2004) 312-316.
• [10] L.A. Dobrzański, Z. Brytan, M. Actis Grande, M. Rosso, Corrosion resistance of sintered duplex stainless steel evaluated by electrochemical method, Journal of Achievements in Materials and Manufacturing Engineering 17 (2006) 317-320.
• [11] L.A. Dobrzański, Z. Brytan, M. Actis Grande, M. Rosso, Properties of duplex stainless steels made by powder metallurgy, Archives of Materials Science and Engineering 28/4 (2007) 217-223.
• [12] M. Rosso, M. Actis Grande, ‘High density sintered stainless steels with improved properties’, Journal of Achievements in Materials and Manufacturing Engineering 21/2 (2007) 97-102.
• [13] V. Mazurovsky, M. Zinigrad and A. Zinigrad, Mathematical representaiton of a modified Schaeffler diagram, Proceedings of the Second International Conference on Mathematical Modelling and Computer Simulation of Metal Technologies, Ariel, Israel, 2002, 3/129-139.
• [14] V. Mazurovsky, M. Zinigrad and A. Zinigrad, Predicting weld structure using modified Schaeffler constitution diagram Proceedings of the International Conference Mathematical Modeling and Simulation of Metal Technologies, Ariel, Israel, 2000, 540-545.
• [15] V. Mazurovsky, M. Zinigrad and A. Zinigrad Mathematical Model of Weld Microstructure Formation. Proceedings of the 12th International Conference TWI Computer Technology in Welding and Manufacturing Conference, Sydney, Australia, 2002, 79/1-9.