Repository logo
 

Melt-spinning and semi-solid processing of bainitic steel

Accepted version
Peer-reviewed

Loading...
Thumbnail Image

Type

Article

Change log

Authors

Rogal 
Solano-Alvarez, W 
Bhadeshia, HKDH 

Abstract

jats:p A steel with a chemical composition meant to form nanostructured bainite following appropriate heat treatment, was, cooled rapidly from the liquid phase (1550°C) using melt spinning and modified injection-suction methods, as well as from a semi-solid temperature (1430°C) through thixoforming. The hardness of the as-cast melt spun ribbons was ∼960 HV due to a fine martensite–austenite mixture surrounded by three-dimensional skeleton-like primary carbides of length scale 0.2–0.3 µm. The suction-injection cast method led to a similar structure but less hard (780 HV) due to a lower cooling rate. The thixoformed material showed unmelted globular, fine grains and a fine eutectic mixture formed directly from the liquid phase. The variety of processed steel samples were tempered and their microstructures, examined. </jats:p>

Description

Keywords

Bainitic steel, Thixoforming, Rapid cooling, Microstrucutre

Journal Title

Materials Science and Technology (United Kingdom)

Conference Name

Journal ISSN

0267-0836
1743-2847

Volume Title

33

Publisher

SAGE Publications
Sponsorship
The research was supported by Polish Science Financial Resources Applied Research Programme of the National Centre for Research and Development in Poland; “Developing a technology of producing complex elements by steel thixoforming” PBS1/B5/22/2013 and project No INNNOTECH-K2/IN2/20/181917/NCBR/13.