Development of sintered Mn-(Mo)-(Cr)-C steels.

• Autorzy: Mitchell S.C. , Wronski A.S. , Cias A.

Warianty tytułu

PL

Rozwój spiekanych stali Mn-(Mo)-(Cr)-C.

• Konferencja: XVIth Physical Metallurgy and Materials Science Conference on Advanced Materials and Technologies AMT'2001, Gdańsk-Jurata, 16-20 September, 2001
• Języki publikacji: EN

Abstrakty

EN

The potential of manganese and chromium as alloying elements, reflected in their widespread use in wrought medium-to-high strength steels, is still to be realised in Powder Metallurgy alloys. The attempts to sinter Mn [+ Cr] alloys have largely ended in failure, due to either poor mechanical properties or lack of reproducibility. The authors have analysed previously published results and identified the principal reason as lack of process control: both in powder preparation and during sintering. This leads to large-scale oxidation, in the form of brittle networks, and also to lack of diffusion, due to the oxide film barriers. Reviewed now are the necessary processing conditions established for the successful processing of manganese steels. The development of additional chromium and molybdenum alloying is also considered and results are presented which additionally incorporate current areas of research, involving warm compaction, high temperature (including liquid phase) sintering and sinter and air hardening.

Słowa kluczowe

EN

powder metallurgy; sintered steels; steels; manganese alloys; alloying; compaction; high temperature; hardening; microstructure

PL

metalurgia proszków; spiekanie; stal; stop manganowy; stapianie; stopowanie; kompakt; temperatura wysoka; utwardzanie; mikrostruktura

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Inżynieria Materiałowa
• Rocznik: 2001
• Tom: R. XXII, nr 5
• Strony: 633--646
• Opis fizyczny: Bibliogr. 26 poz., tab., rys.

Twórcy

autor

Mitchell S.C.

• University of Bradford, UK

autor

Wronski A.S.

• University of Bradford, UK

autor

Cias A.

• Akademia Górniczo-Hutnicza, Kraków, Poland

• University of Bradford, UK

Bibliografia

• [1] Mitchell S.C.: The Development of Powder Metallurgy Manganese Containing Low-Alloy Steels. Ph.D. thesis, University of Bradford, 2000.
• [2] Lindberg C.: Mechanical Properties of Water Atomised Fe-Cr-Mo Powder and How to Sinter It. Advances in Powder Metallurgy and Particulate Materials MPIF 2 (1999) pp.7-229 to 7-244.
• [3] Jones P.K., Goder K.B., Lawcock R. and Shivanath R.: Densification Strategies for Advanced High Endurance P/M Components. Proc. PM World Congrcss on PM and Part. Mater 4 MPIF ( 1996) pp. 13-439 to 13-450.
• [4] Jones P.K., Buckley-Golder K., David H., Lawcock R., Sarafinchan O., Shivanath R. and Yao L.: Fatigue Properties of Advanced High Deasity Powder Metal Alloy Steels for High Performance Powertrain Applications. Proc. 1998 Powder Metallurgy World Congress, Vol. 3, EPMA, Granada, Spain, 1988, pp.155-166.
• [5] Hi-density sintered alloy. US5516483 Patent, Stackpole Ltd (Ca), 1996.
• [6] Šalak A., Selecká M. and Bures R.: The Role of Atmosphere for Sintering of Mn-containing PM Steels. TU Wien Workshop Sintering Atmospheres for Ferrous Components - Hogänäs Chair, 10, 1999.
• [7] Mocarski S., Hall O.W., Chemenkoff R.A., Yeager D.A. and McHugh C.O.: Powder. Metall. 39 (1996) p.130.
• [8] Šalak A.: Sintered Manganese Steels, Part 11: Manganese Evaporation during Sintering. Powder Metall. Int. 2 (1980) pp.72-75.
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• [10] Caninha I.M.V. and Assunção F.C.R.: Sintering Behaviour and Microstructural Evolution of Iron Powder with Ferro-Manganese Addition. Proc. PM'90, Vol.3, The Institute of Metals, London, 1990, pp.94-98.
• [11] Šalak A., Dudrová E. and Miskovic V.: Sintered Toothed Gears for Hydrogenerators Produced from Powder Mixed Manganese Steels. Powder Met. Sci. Technoll. 3 (1992) pp.26-35.
• [12] Danninger H .. Pönschancher R., Jangg G., Seyrkammer J. and Šalak A.: Manganese Alloyed Sintered Steels prepared from Elemental Powders. Proc. PM'94, Vol. II, SF2M, Paris, 1994, pp.879-882.
• [13] Cias A., Mitchell S.C. and AS, Wronski AS.: Microstructure and Properties of PM 0.6%C Manganese Steels. Proc. 1998 Powder Metallurgy World Congress, Vol. 3, EPMA, Granada, Spain, 1988, pp.179-184.
• [14] Wronski A.S., Cias A., Barczy P., Stoytchev M. et al: Tough Fatigue and Wear Resistant Sintered Gear Wheels. Final Report on EU Copemicus Contract No. ERB CIPA CT-94-0108, European Commission, 1998.
• [15] Cias A, Mitchell S.C., Watts A. and Wronski A.S.: Microstructure and Mechanical Properties of Sintered 2-4%Mn,0.6-0.8%C Steels. Powder Met. 52 (1999) pp.229-233.
• [16] Mitchell S.C., Wronski AS., Cias A. and Stoytchev M.: Microstructure and Mechanical Properties of Mn-Cr-Mo-C Steels Sintered at> 1140C. Advances in Powder Metallurgy and Particulate Materials MPIF 2 (1999) pp.7-129 to 7-144.
• [17] Cias A., Stoytchev M. and Wronski A.S.: New Orleans 2001 MPIF Conf. Proc., to be published as Advances in Powder Metallurgy and Particulatc Materials.
• [18] Youseffi M., Mitchell S.C., Wronski A.S. and Cias A.: Sintering Microstructure and Mechanical Properties of PM Manganese - Molybdenum Steel. Powder Met. 43 (2000) pp.353-35.
• [19] EU Carcinogen Directives 90/394/EEC and 91 /322/EEC
• [20] Wronski A.S., Becker B.S., Wright C.S. and Mitchell S.C.: Alloy Design for Improved Mechanical Properties and Robust Processing. Proc. OFPM"99, ed. L. Parilak and H. Danninger, Vol. 1, 1999, pp.1/155 to 1/166.
• [21] Mitchell S.C., Becker B S and Wronski A.S., Further Alloying Additions to PM Fe-Mn-C Steels. Proc 2000 Power Metallurgy World Congress, Kyoto, K Kosuge and H Nagai, Eds. 2001, The Japan Soc. of Powder and Powder Metall, Part II. pp 923-926
• [22] Pieczonka T, Mitchell S.C., Stoytchev M. and Kazior J , New Orleans 2001 MPIF Conf. Proc., to be published as Advances in Powder Metallurgy and Particulate Matrials
• [23] Danninger H , Wolfsgruber E. and Ratzi R, Sintering of Different PM Ferrous Materials al Moderate Temperatures Proc 1998 Powder Metallurgy World Congress, Vol 2, EPMA, Granada. Spainn, 1988 , pp. 290-295
• [24] Smithells C.J., Metal Reference Book. Vol. II, Butterworths, London, 1955, p.556.
• [25] Mitchell S.C., Youscffi M. and Wroński A.S., Laboratory Processing of Fe-M0-Cr-C Steels to 7.6 g/cc Sintered Density. To be presented at PM2001, Nice, 2001, and published by EPMA.
• [26] Cias A, Sulowski M., Mitchell S.C. and Wroński A S., Sinter Hardening of Fe-Mn-C Steels. To be presented at PM2001, Nice, 2001, and published by EPMA.