Design of carbide free bainitic steels for hot rolling practices

ABSTRACT

In this work, we provide with an overview of the main theories, metallurgical and microstructural concepts used for the design of carbide free bainitic steels adapted to industrial hot rolling and coiling practices. The selected alloys were cast and tested at pilot plant scale and the obtained good combinations of properties tend to validate the thorough and careful approach undertaken to predict the microstructures during the alloy design process.

KEYWORDS:

• Design
• hot rolling
• bainite
• retained austenite
• mechanical properties

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The authors would like to thank the European Research Fund for Coal and Steel for financial support [grant number RFCS-2019-899482 DynAustab].

Notes on contributors

Radhakanta Rana

Radhakanta Rana is a PhD in Metallurgical & Materials Engineering, is a Principal Researcher and currently engaged in the development of innovative advanced & ultrahigh strength steels for Automotive and Lifting & Excavating applications using a variety of innovative alloying and processing/manufacturing approaches.

Erick Cordova-Tapia

Erick Cordova-Tapia is a Master in Advanced Materials Engineering and PhD candidate focusing on the thermo-mechanical stability of retained austenite. He investigates the interplay between austenite stability and the ferritic matrix, employing a multidisciplinary strategy that merges theoretical and experimental,methods.

Jose A. Jimenez

Jose A. Jimenez is a Senior Scientist and Head of the X ray laboratory, his actual research lines include microstructural characterization, thermo mechanical processing and mechanical properties of steels, intermetallic alloys, and copper based composite materials.

Lucia Morales-Rivas

Lucia Morales-Rivas is a ComFuturo Fellow, her research interests involve the determination of mechanisms of displacive transformations, deformation and damage in advanced steels and other metallic alloys with metastable structures, from both experimental and theoretical approaches.

Carlos Garcia-Mateo

Carlos Garcia-Mateo is a Senior Scientist and Head of the Phase Transformation laboratory, his actual research lines include, phase transformation, microstructural and properties characterization of steels.