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Mechanical, Microstructural and Corrosion performance for MIM materials based on coarse (-45µm) powders of ferritic stainless steel
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.
2012 (engelsk)Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
Abstract [en]

The purpose of this research is to investigate the mechanical, microstructural and corrosion performance of the ferritic stainless steel coarse powders, used in Metal Injection Molding (MIM) process. Three coarser powders made by Höganäs AB, were examined along with a commercially available fine MIM powder and samples from sheet metal. The studied powders were individually mixed with binders and then injection molded in the shape of dog bone shaped tensile bars. These green samples were then debinded and sintered to examine under different characterization methods. The methods used for examining the samples were tensile test, hardness test, metallography, SEM, chemical analysis, and salt spray test. After a comparative study of these different materials, it turns out that the chemical composition and the process parameters have more effect on materials properties compared to only particle size distribution in studied materials. After this study, 434 coarse powder was preferred upon the PolyMIM 430 fine powder, because of its lower price and same performance as that of PolyMIM 430.

sted, utgiver, år, opplag, sider
2012. , s. 49
Emneord [en]
Powder metallurgy, MIM, Metal injection molding, Corrosion testing, Coarser powder, Salt spray test, Ferritic stainless steel powders.
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-127680OAI: oai:DiVA.org:kth-127680DiVA, id: diva2:645080
Eksternt samarbeid
Höganäs AB, Sweden.
Utdanningsprogram
Master of Science - Materials Science and Engineering
Presentation
2012-08-28, Conference Room, Höganäs AB, Bruksgatan 35, SE-263 83, Höganäs, Sweden, 09:00 (engelsk)
Veileder
Examiner
Tilgjengelig fra: 2013-09-09 Laget: 2013-09-03 Sist oppdatert: 2013-09-09bibliografisk kontrollert

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Syed Ali Afraz's Masters Thesis(6724 kB)1427 nedlastinger
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