Document Type : Original Reaearch Article
Authors
Department of advanced materials and new energy, Iranian Research Organization for Science and Technology, Tehran, Iran.
Abstract
In this study, porous samples of 316L were prepared by aqueous atomizing during powder metallurgy
process. Pure 316L powder, as well as mixed with a certain percentage of Sn powder has been used to prepare the test
specimens, Then, by spraying zinc stearate as a lubricant on the mold surfaces and punches, the mixtures were pressed
into a rigid mold at four different pressures of 300, 350, 400 and 450 MPa. The green bulk were sintered in vacuum
atmosphere at 1320 ° C for 60 min. The samples were cooled in the furnace and their densities were measured and then
microstructural and chemical analysis was performed by light microscopy and scanning electron microscopy.
Measuring the density of the sintered samples showed that the porosity of the samples was from 38% to 46%)
Keywords
2. Coovattanachai, O., Tosangthum, N., Morakotjinda, M., Yotkaew, T., Daraphan, A., Krataitong, R., Vetayanugul, B., & Tongsri, R. . Performance improvement of P/M 316L by addition of liquid phase forming powder. Materials Science and Engineering: A, 2007, 445, 440-445.
3. Erhard Klar, Prasan K. Samal, , Powder Metallurgy Stainless Steels: Processing, Microstructure and Properties ASM International , 2007
4. Garcia C., Martína F., Tiedraa, P., García Cambronerob, L. . Pitting corrosion behaviour of PM austenitic stainless steels sintered in nitrogen–hydrogen atmosphere. Corrosion Science 2007, 49(4), 1718-1736.
5. R.M. German "Gas Flow Physics in Porous Metal", Inter. J. Powder Metall. Powder Tech., 1979, Vol.15, p23-30.
6. W. Schatt & K, P, Wieters, "Powder Metallurgy", European Powder Metallurgy Association, 1997 p346352,
8. Salak A., "Ferrous Powder Metallurgy", Cambridge International Science Publishing, Cambridge, 1997.
9. N. Chawla, S. Polasik, K.S. Narasimhan, K.K. Chawla, Inter. J. Powder Metall. Vol.37, No.49, 2001.
10. . Polasik S.J. Williams J.J. Chawla N, "Metall. Mater. Trans. A, 33A,73,2002
11. Tang H.P., "Rare Metal Material and Engineering", 26:1, 1997.
12. Padmavathi, C., Upadhyaya, A., & Agrawal, D. . Corrosion behavior of microwave-sintered austenitic stainless steel composites. Scripta Materialia, 2007 57(7), 651-654.
13. Verlee, B., Dormal, T., & Lecomte-Beckers, J. Density and porosity control of sintered 316L stainless steel parts
produced by additive manufacturing. Powder Metallurgy, 2012 55(4), 260-267.
14. "Powder Metal Technologies and Applications", Vol 7, ASM Handbook, 1998, ASM International.
15. Tosangthum N., Muangtiong P., Ornmanee Coovattanachail, M et al., . Effects of Tin Powder on Properties of Sintered Stainless Steels, Journal of Metals, Materials and Minerals. 2008 Vol.18 No. 1 pp.47-51.
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