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:
Different cooling parameters, including the initial cooling temperature, finishing coolingtemperature and cooling rate, have a significant effect on the final microstructures and properties forpipeline steels. In present work, Gleeble-1500 thermal-mechanical simulator was used to investigatethe microstructural evolution of X70 pipeline steels under different cooling conditions, and themicrostructures obtained were analyzed using optical microscope and transmission electronmicroscope. The experimental results showed that when the initial and finishing cooling temperaturesare controlled in the range of 740~760°C and 500~520°C respectively, the microstructure of X70pipeline steels reveals a proper content (about 12%) of pre-eutectoid ferrite besides acicular ferriteand M/A (Martensite/Austenite) island, which can guarantee an optimum combination of strength andductility. In contrast to the conventional way using CCT curve, this methodology shows a higheraccuracy and operability, and used in industrial production to achieve good effect
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.575-578.1038.pdf
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