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:
In order to control WC grain size and get a microstructure with fine grain size during thesintering process, WC grain growth in WC-Co cemented carbide was investigated. The possiblereason on the grain growth was showed which includes the normal grain growth (NGG) and theabnormal grain growth (AGG). We adopted the SPS (spark plasma sintering) to sinter nanometerWC-Co powder, the range of temperature was 1100 -1250 ºC, the pressure was 40MPa, and sinteringtime was 5min. In this paper, we discuss the density, hardness, microstructures and grain sizes of thesintered samples. The results showed that during the process sintering WC-Co powder, there are twokinds of growths. XRD investigation of the WC–Co samples spark plasma sintered to full densityrevealed that no new phase was created. Through the observed microstructure of the sintered samples,we analyzed the reason of the abnormal grain growth of WC grain. The density and hardness ofsamples were increased with increasing temperature
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.558-559.959.pdf
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