On the role of Nb on the texture and microstructure of a novel as-rolled medium carbon wear resistant slurry pipeline steel
Javaheri, Vahid; Nyo, Tun Tun; Porter, David (2018-01-19)
Javaheri V., Nyo T.T., Porter D. (2018) On the Role of Nb on the Texture and Microstructure of a Novel As-Rolled Medium Carbon Wear Resistant Slurry Pipeline Steel. In: Hwang JY. et al. (eds) 9th International Symposium on High-Temperature Metallurgical Processing. TMS 2018. The Minerals, Metals & Materials Series. Springer, Cham
© The Minerals, Metals & Materials Society 2018. This is a prepublication version of an article published in 9th International Symposium on High-Temperature Metallurgical Processing. The final published version is available online at: http://dx.doi.org/10.1007/978-3-319-72138-5_37.
A field emission scanning electron microscope equipped with EBSD has been employed to evaluate the role of 0.013 wt% Nb on the evolution of the microstructure and texture of a novel thermomechanically processed low-alloy, medium-carbon steel. Specimens were subjected to hot-rolling with a total reduction of 80%, four passes in the recrystallization regime and four passes below the non-recrystallization temperature. Immediately after rolling, the strips were quenched to 420 °C and subsequently cooled slowly in a furnace to simulate strip coiling with transformation of austenite to bainite. The results showed that Nb microalloying results in a finer microstructure with a sharper texture when compared to an identical steel but without Nb. In addition, analysis of the retained austenite texture indicated that the main bcc texture components are the product transformed brass and copper components in the parent austenite.
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