Influence of Co and Al on pearlitic transformation in superbainitic steels
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چکیده
Copyright and Moral Rights for the articles on this site are retained by the individual authors and/or other copyright owners. For more information on Open Research Online's data policy on reuse of materials please consult the policies page. Abstract The effect of cobalt and aluminium on the austenite-to-pearlite transformation in a super-bainitic steel was investigated. The experimental work showed that the transformation rate of pearlitic and the volume fraction of pearlite both were increased by adding about 4 wt. % Co and 1.5 wt. % Al to the parent super-bainitic steel. The addition of cobalt and aluminium to super-bainitic steels desirably accelerated the growth rate of pearlitic microstructure, and undesirably reduced the interlamellar spacing of pearlite; resulting in a hardness higher than that of the parent steel in the pearlitic condition. Nevertheless, the accelerated pearlitic reaction, as a softening process of the super-bainitic steels prior to machining/forming, may make the commercial use of these steels more viable.
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