ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The present study aims to prepare feedstocks for MIM (Metal Injection Molding) wherethe metal powders are 316L stainless steel powders (SS). The master objective is to compare theperformance of a biodegradable binder with a commercial one based on polyolefins. Differentchallenges must be overcome in SS injection molding, as follows: to decrease binder/carbon contentin feedstocks; to decrease carbon contamination during debinding and sintering; to avoid theformation of chromium carbide and presence of precipitation-free zones; to avoid the grain growthduring sintering and to reduce the feedstock price. The optimization of the feedstocks wasperformed using a torque rheometry technique. Feedstocks of coated and uncoated SS powdersmixed with an agar-based binder were used to produce sound parts. A feedstock constituted by SSpowders mixed with a high quality commercial binder was the standard. SS with agar-based onfeedstocks can admit solids content similar to those based on the commercial binder (62 vol.%). Forsimilar powder content, the sinters resulting from feedstocks with the agar-based binder shows alower quantity of solid solution of carbon and chromium carbides, absence of precipitation-freezones than commercial feedstocks and good sinter soundness. Coating powders with nanocrystallinestainless steel contribute to control grain growth during debinding and sintering
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.587-588.385.pdf
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