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Research on Transformation Law of X80 Pipeline Steel
Pages: 17-19
Year: Issue:  4
Journal: Wide and Heavy Plate

Keyword:  CCT curveAcicular ferriteControlled cooling;
Abstract: The transformation law of X80 pipeline steel is studied by means of Gleeble - 1500 thermal simulator. The CCT curve is set up and the influencing law of technological parameters on microstructure is analyzed by using thermal expansion method and metallographic method. The test results show that the microstructure of the test steel mainly consists of polygonal ferrite formed at low cooling rate,the microstructure is refined with the increase of cooling rate. Desired acicular ferrite is obtained at a cooling rate ranging between 10 and 30 ℃ / s.
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