Article ID Journal Published Year Pages File Type
1572810 Materials Characterization 2006 8 Pages PDF
Abstract

The time–temperature–transformation (TTT) and continuous cooling transformation (CCT) diagrams of 86CrMoV7 steel with and without hot deformation were constructed by means of dilatometry, metallography and transmission electron microscopy (TEM). The results show that the pearlite and bainite transformations of 86CrMoV7 steel can be promoted and the microstructure can be refined by hot deformation. The undissolved carbides associated with hot deformation increase the inhomogeneity of carbon distribution in deformed austenite. The inhomogeneities of the austenite increase the number of nucleation sites for pearlite and bainite, and promote pearlite and bainite formation, which result in refinement of both the pearlite and bainite microstructures. In contrast, the undissolved carbides do not play a direct role on the pearlite and bainite transformation of 86CrMoV7 steel in the absence of hot deformation.

Related Topics
Physical Sciences and Engineering Materials Science Materials Science (General)
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