Fractography of Sinteraustempered and Sinterhardened Fe-3Mn-0.8C PM Steels

• Autorzy: Tenerowicz M. , Sułkowski M.

Identyfikatory

DOI

10.1515/amm-2016-0307

• Języki publikacji: EN

Abstrakty

EN

Sintered steels with the addition of manganese are widely used in industry because of their attractive mechanical properties. The main problem of using manganese in powder metallurgy steel production is its high affinity for oxygen. The choice of proper sintering parameters can significantly improve the properties of the final product. For the present investigations Höganäs iron powder grade NC 100.24, low-carbon (1.3%C) ferromanganese Elkem (Eramet Norway Sauda – formerly Elkem Manganese Sauda) and graphite powder grade C-UF were used as the starting powders. Mixture of powders, containing 3% Mn and 0.8% C, was prepared in Turbula mixer for 30 minutes. Following mixing, “dog bone” compacts were pressed at 660 MPa according to PN-EN ISO 2740 standard. Sintering of compacts was carried out in the laboratory tube furnace at 1120 and 1250°C for 60 minutes in air or pure nitrogen (99.999%N2). The present investigation deals with the comparison of two heat treatment routes: sinterhardening (SH) and sinteraustempering (SAT), carried out both in air and pure nitrogen. Mechanically tested steels were investigated using JEOL JSM 700F completed with EDS. Metallography tests were carried out on 3% Nital etched samples. In this paper the results of mechanical tests and metallography and fractography investigations are shown. According to the results obtained, it can be assumed that for sinteraustempering higher temperature does not influence mechanical properties of sintered steels. For both methods using pure nitrogen as sintering atmosphere gave better results.

Słowa kluczowe

EN

sinteraustempering; sinterhardening; fractography; PM manganese steels

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2016
• Tom: Vol. 61, iss. 4
• Strony: 1909--1918
• Opis fizyczny: Bibliogr. 16 poz., rys., schem., tab., wykr.

Twórcy

autor

Tenerowicz M.

• AGH University of Science and Technology, Faculty of Metals Enginering and Industrial Computer Science, Department of Physical Metallurgy & Powder Metallurgy, Al. A. Mickiewicza 30, 30-059 Kraków, Poland

autor

Sułkowski M.

• AGH University of Science and Technology, Faculty of Metals Enginering and Industrial Computer Science, Department of Physical Metallurgy & Powder Metallurgy, Al. A. Mickiewicza 30, 30-059 Kraków, Poland

Bibliografia

• [1] E. Dudrova, M. Kabatova, Powder Metallurgy Training Courses, Germany 3-11 September 2005, EMPA.
• [2] A. Romański. Optimization of the Chemical Composition and Manufacturing Parameters of Sintered Fe-Mn-Mo-C Steel. PhD. Thesis, AGH UST, Cracow (2000).
• [3] P. K. Jones, K. Buckley-Golder, H. David, R. Lawcock, D. Sarafinchan, R. Shivanath, L. Yao, in: Proc. of 1998 World PM Congress, 155 (1998).
• [4] M. Sulowski, M. Kabatova, E. Dudrova, Powder Metallurgy Progress 12, (2), 71-83 (2012).
• [5] S. Cygan, M. Sułowski, M. Ciesielka, Ores and Non-ferrous Metals R57, (9), 609-614 (2012).
• [6] P. Gac, M. Sułowski, M. Ciesielka, Ores and Non-ferrous Metals R57, (10), 712-717 (2012).
• [7] M. Sulowski, M. Kabatova, E. Dudrova, Acta Metallurgica Slovaca – Conference 3, 237-246 (2013).
• [8] E. Chudzik, M. Sułowski, M. Ciesielka, Ores and Non-ferrous Metals R58, (6), 326-332 (2013).
• [9] E. Lichańska, M. Sułowski, M. Ciesielka, Ores and Non-ferrous Metals R58, (9), 514-520 (2013).
• [10] T. Pieczonka, M. Sułowski, A. Ciaś, Archives of Metallurgy and Materials 57, (24), 71001-1009 (2012).
• [11] M. Sułowski, Powder Metallurgy 53, (2), 125-140 (2010).
• [12] Ch. Fiał, E. Dudrová, M. Kabátová, M. Kupková, M. Selecká, M. Sułowski, A. Ciaś, Powder Metallurgy Progress 15, special issue, 124-129 (2015).
• [13] Ch. Fiał, E. Dudrová, M. Kabátová, M. Kupková, M. Selecká, M. Sułowski, A. Ciaś, Powder Metallurgy Progress 14, (3), 137–147 (2014).
• [14] A. Ciaś, Science of Sintering 47, (1), 61-69 (2015)
• [15] P. Hebda. Sinteraustempering of manganese steels sintered in 1120°C. Master Thesis, AGH, Cracow, 2014.
• [16] B. Milewski. Influence of sintering atmosphere on mechanical properties and microstructure of sintered manganese steel. Master Thesis, AGH, Cracow, 2014.

Uwagi

EN

The authors are grateful to dr M. Kupkova, dr E. Dudrova and M. Kabatova from IMR SAS, Kosice, Slovakia for their scientific discussion, helpful advice and contribution to material testing. The financial support of the Ministry of Science and Higher Education under AGH contract no 11.11.110.299 is gratefully acknowledged. Appreciation is also expressed to Prof. A. S. Wronski for his advice and comments on the manuscript, as well as its editing.