Comparison of Mechanical Properties of Mn-Cr-Mo Steels Sintered in Different Conditions

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Abstract:

The present work discussed the development of statistical analysis as a reproducibility assistance method for evaluation of advanced Fe-3%Mn-(Cr)-(Mo)-C sintered steel for high performance structural parts. Factors contributing to the reliability and reproducibility of these structural steels include advanced metal matrix with consistent purity and concentration of chemical constituents, as well as mix homogeneity and processing uniformity. Matrix inhomogeneity was found to play an important role in these materials. In this paper the statistical dependence between properties and processing variables of PM Mn-Cr-Mo steels is presented. The investigations of sintered steels were based on commercial powders: pre-alloyed Höganäs iron powders Astaloy CrM and Astaloy CrL and graphite C-UF. As a manganese donor low-carbon ferromanganese powder was used. Sintering was carried out in different atmospheres at 1120°C and 1250°C. After sintering, investigated steels were subsequently tempered at 200°C for 60 min in air. The results of statistical analysis show, there is the relationship between mechanical properties versus processing parameters.

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Periodical:

Solid State Phenomena (Volume 197)

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33-40

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Online since:

February 2013

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[1] A.S. Wronski et al., Final Report on EU Copernicus Contract CIPA CT-94-0108, European Commission, (1998).

Google Scholar

[2] A. Cias, S.C. Mitchell, A. Watts, A.S. Wronski, Microstructure and mechanical properties of sintered (2-4)Mn (0. 6-0. 8)C steels, Powder Metallurgy 42 (1999) 227-233.

DOI: 10.1179/003258999665567

Google Scholar

[3] EC Cancirogen Directives 90/394/EEC and 91/322/EEC.

Google Scholar

[4] A. Cias, S.C. Mitchell, A.S. Wronski, Microstructure and properties of PM 0. 6%C manganese steels, Proc. of 1998 PM World Congress, organized by EPMA, Granada, 3 (1998) 179-189.

Google Scholar

[5] M. Sulowski, A. Cias, Effect of processing variables on mechanical properties of sintered manganese steels Fe-3%Mn-0, 8%C, Inżynieria Materiałowa 4 (1998) 1179-1182.

Google Scholar

[6] S.C. Mitchell, A.S. Wronski, A. Cias, M. Stoytchev, Microstructure and mechanical properties of Mn-Cr-Mo-C steels sintered at >1140°C, Proc. of PM2TEC, organized by MPIF, Vancouver, 2 (1999) Part 7–PM steels 129-144.

DOI: 10.1179/003258999665567

Google Scholar

[7] P.K. Jones, et al., Fatigue properties of advanced high density powder metal alloy steels for high performance powertrain applications, Proc. of 1998 PM World Congress, organized by EPMA, Granada, Spain, 3 (1998) 155-166.

DOI: 10.1016/0026-0657(99)93262-9

Google Scholar

[8] A. Romanski, A. Cias, Properties of Mo-alloyed sintered manganese steels, Inżynieria Materiałowa 4 (1998) 1175-1178.

Google Scholar

[9] A. Šalak, M. Selecka, R. Bures, The role of the atmosphere for sintering of Mn-containing PM steels, TU Wien Workshop Sintering atmospheres for ferrous components, Höganäs Chair, 10-11 September, (1999).

Google Scholar

[10] A. Cias, M. Sulowski, S.C. Mitchell, A.S. Wronski, Sinter-hardening of Fe-Mn-C steels, Proc. of PM2001, Nice, 22-24 October, 4 (2001) 246-251.

Google Scholar

[11] M. Sulowski, M. Kabatova, E. Dudrova, Microstructure and properties of Cr-Mn alloyed sintered steels, Powder Metallurgy Progress, to be published.

DOI: 10.1515/pmp-2017-0010

Google Scholar

[12] J. Cwajna, S. Roskosz, Quantitative description of the microstructure–porosity of sialons and iron silicide inclusions, Materials Characterization 56 (2006) 442–448.

DOI: 10.1016/j.matchar.2006.01.001

Google Scholar

[13] S. Roskosz, M. Staszewski, J. Cwajna, A complex procedure for describing porosity in precision cast elements of aircraft engines made of MAR-M 247 and MAR-M 509 superalloys, Materials Characterization 56 (2006) 405–413.

DOI: 10.1016/j.matchar.2005.11.005

Google Scholar

[14] L. Wojnar, J.K. Kurzydłowski, J. Szala, Practice of image analysis, Polish Society for Stereology, Kraków, (2002).

Google Scholar

[15] ASTM Committee E-4, Standard Practice for Determining the Inclusion or Second-Phase Constituent Content of Metals by Automatic Image Analysis. Annual Book of ASTM Standards, Sect. 3, Vol. 03. 01, (2001).

DOI: 10.1520/e1245-03

Google Scholar

[16] M. Sulowski, A. Cias, H. Frydrych, J. Frydrych, I. Olszewska, R. Golen, M. Sowa, How processing variables influence the properties of manganese P/M steels with chromium and molybdenum additions?, Proc. of PowderMet2006 Conference, organized by MPIF, San Diego, 10 (2006).

DOI: 10.4028/www.scientific.net/msf.534-536.757

Google Scholar

[17] A. Cias, Development and Properties of Fe-Mn-(Mo)-(Cr)-C Sintered Structural Steels, Uczelniane Wydawnictwo Naukowo-Dydaktyczne, Cracow, (2004).

Google Scholar

[18] A. Cias, S.C. Mitchell, K. Pilch, H. Cias, M. Sulowski, A.S. Wronski, Tensile properties of Fe-3Mn-0. 6/0. 7C steels sintered in semi-closed containers in dry hydrogen, nitrogen and mixtures thereof, Powder Metallurgy 46 (2003) 165-170.

DOI: 10.1179/003258903225005312

Google Scholar

[19] M. Sulowski, The structure and mechanical properties of iron-manganese-carbon PM structural parts (in Polish), Ph.D. Thesis, AGH-UST, Cracow, (2003).

Google Scholar