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:
Atmosphere control in a continuous sintering furnace is one of the most importantvariables in a successful sintering process. This statement becomes even more weight whensintering of high chromium containing powders at elevated temperatures is applied. Depending onthe sintering atmosphere, de-carburization at the surface of a product is almost impossible to avoid.The production of more highly loaded PM parts by sintering requires higher sintering temperatures,which in turn increases the need for controlling the carbon level, and limiting surface decarburization.One way to control the carbon level is to add CO to the sintering atmosphere and increase thecarbon activity of the atmosphere. This idea has been used in conventional carburizing for decades.But is it applicable for sintering processes at temperatures up to 1250°C? The presented papershows results of tests on Astaloy CrM bodies with additions of up to 0.6% carbon that were sinteredat 1250°C in carbon monoxide containing atmospheres with and without hydrogen additions.Finally, an outlook of how this technology could be implemented in industrial scale sinteringfurnaces will be given
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.591-593.300.pdf
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