ISSN:
1662-8985
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
The air cooling rate of the Low Carbon Mn-Si-Cr steel bar with different diameter afteraustenitizing at 910oC and 960oC was simulated by Formaster-F Phase transforming instrument andGleeble-1500 thermal /mechanical simulating machine. Microstructure of the specimen was observedby OLYMPUS PME3 optical microscope and FEI QUANTA200F scanning electron microscope. Thehardness and impact toughness of the steel was tested by HBRV-187.5 hardness tester and JCSJ300-Iinstrumented Charpy impact tester. The experimental result showed that with the amount of CFB inCFB+M mixed microstructure increasing the combination of strength and toughness of the steel wasimproved. The higher the austenitizing temperature of the steel, the wider the air-cooling rate rangeobtaining CFB+M mixed microstructure. However, the steel produces mixed grain after austenitizingat 960 oC. For obtaining fine prior austenite grain size, Ti and Nb alloying element need to be added
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.33-37.527.pdf
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