ISSN:
1662-8985
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 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
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.33-37.527.pdf
Permalink