High density sintered stainless steels with improved properties

• Autorzy: Rosso M. , Actis Grande M.
• Języki publikacji: EN

Abstrakty

EN

Purpose: of this paper is the study of the properties of sintered ALSI 316L (1.4404 according to EN 10088. Sintered stainless steels occupy a prominent position in the high alloyed steels, however their properties are limited by the presence of porosity. The improvement of quality and performances of products coupled with a reduction of manufacturing costs calls for high compacting pressures, as well as high sintering temperatures. However, the possibility to fill the open porosity of sintered parts by infiltration process with a metal alloy or by the use of reactive sintering techniques can favour the production of stainless steel parts with enhanced mechanical properties and good corrosion resistance). Design/methodology/approach: Sintered AISI 316L (1.4404 according to EN 10088) stainless steel samples have been manufactured using different combinations of compacting pressure and sintering parameters (time, temperature, atmosphere), or a modified composition able to allow reactive sintering process, as well as the contact infiltration with bronze. Findings: the studies have been forwarded towards the statistical and dynamic mechanical properties, as well as the corrosion behavior. Lowering the porosity level and increasing the sintering degree, by use of higher compacting pressure or sintering temperature, is of great effectiveness, especially from the point of view of mechanical properties and fatique endurance. Practical implications: the obtained results demonstrate the benefits of contact infiltration and of reactive sintering techniques to sinter stainless steels components having higher density and better mechanical and corrosion resistance properties than the traditional compositions, compacted at high pressure and sintered at elevated temperature. Originality/value: very promising results have been also obtained with a modified composition able to allow reactive sintering process.

Słowa kluczowe

EN

stainless steel; reactive sintering; contact infiltration; corrosion resistance; density

PL

stal stopowa; spiekanie reakcyjne; infiltracja; odporność korozyjna; gęstość

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 21, nr 2
• Strony: 97--102
• Opis fizyczny: Bibliogr. 15 poz., fot., rys., tab.

Twórcy

autor

Rosso M.

autor

Actis Grande M.

• Materials Science and Chemical Engineering Department, Polytechnic of Torino C.so Duca degli Abruzzi, 24 10129 Torino, Italy,

Bibliografia

• [1] M. Rosso, S. Rognini, O. Morandi, "Properties of High Density 316L Stainless Steel with Improved Corrosion Resistance", Proc. of PM97, Munich October, 1997 in "Advances in Structural PM Component Production", EPMA, Shrewsbury, UK, 280-287.
• [2] M. Rosso, O. Morandi, "Propriétés des Aciérs Inoxidables Frittés a Faible Porosité", Proc. of "Colloque National de Métallurgie des Poudres", INPG Grenoble 6-8 Avril 1998, SF2M (1998), 237-242.
• [3] J.V. Wood. M. Rosso. G. Pono, "Sintering of stainless steel 316L powders" Proc of the 4th European Conf. on advanced Materials and Processes, ed Associazione Italiana di Metallurgia e The Federation of European Materials Societies, Padova-Venezia, 1995, sez, G2. 133-138.
• [4] M. Rosso, J. Wood. G. Porto, „Properties of High Density Sintered 316L Stainless Steels in. Advances In Powder Metallurgy & Particulate Materials - 1996 World Congress, June 16-21, 1996, Washington. Vol. 5.MPIF. Princeton, N.J., 1996. 17-87.
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• [6] M. Rosso, O. Morandi, "Studies of Infiltration applied to PM Stainless Steel", Proc. of the "1998 Powder Metallurgy World Congress & Exhibition", Granada, Spain October 18-22 1998, Vol. 3, EPMA Shrewsbury (1998), 435-440.
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• [9] M. Actis Grande, D. Ugues, Z. Brytan, M. Rosso, L.A. Dobrzański, "Properties of vacuum sintered Duplex Stainless Steels", Proceedings of EUROPM 2004, vol. 3, 17-21 October 2004, Vienna, Austria, 2004, 395-400.
• [10] L.A. Dobrzanski, Z. Brytan, M. Actis Grande, M. Rosso, E.J. Pallavicini, "Properties of vacuum sintered duplex stainless steels", in Journal of Materials processing Technology, Vol 162-163 (2005) 286-292.
• [11] M. Actis Grande, M. Rosso, Z. Brytan, "Impact properties and fractography of PM duplex stainless steels" Proceedings of DFPM 2005, 27-30 September 2005, Stara Lesna, Slovakia, Ed. L. Parilak, H. Danninger, EPMA, ISBN 80-968543-4-8, 158-165.
• [12] L.A. Dobrzański, Z. Brytan, M. Actis Grande, M. Rosso, E.J. Pallavicini, "Properties of vacuum sintered duplex stainless steels", Proceedings of the 13th Int. Sc. Conf. "Achievements in Mechanical & Materials Engineering", May 16-19, 2005. Gliwice-Wisla, Poland, 2005,117-120.
• [13] L.A. Dobrzański, Z. Brytan, M. Actis Grande, M. Rosso. "Corrosion resistance of duplex stainless steels in the salt fog spray test", Proceedings of the 11th Int. Sc. Conf. CAM3S' 2005, "Contemporary Achievements in Mechanics, Manufacturing and Materials Science", 2005, Gliwice-Zakopane, Poland, 181-186.
• [14] L.A Dobrzański, Z. Brytan, M. Rosso, M. Actis Grande: Corrosion behavior of vacuum sintered Duplex Stainless Steels, Proceedings of the International Conference on Advanced Materials and Processing Technologies, AMPT'2006, Las Vegas, Cd-rom.
• [15] L.A. Dobrzański, Z. Brytan, M. Actis Grande, M. Rosso. „Sintered Duplex Stainless Steels Corrosion Properties". Materials Science Forum Vols. 534-536 (2007) 721-724.