Systematic investigation of acicular ferrite formation on laboratory scale

D. Loder, S. K. Michelic
2016 Materials Science and Technology  
By increasing the amount of acicular ferrite in the microstructure, steel toughness can be improved significantly. The steel composition, cooling rate, non-metallic inclusions and austenite grain size have a strong influence on the formation of acicular ferrite. The present paper describes and compares two approaches to study acicular ferrite formation in a titanium-deoxidized high-strength low-alloyed (HSLA) steel and its influencing factors on laboratory scale: route A simulates the formation
more » ... lates the formation of acicular ferrite after heat treatment; route B simulates the formation directly after solidification of the melt. The formation of acicular ferrite is essentially influenced by the former processing, which also changes the optimum cooling parameters substantially. (Ti,Mn) x O y and (Ti,Al,Mn) x O y S z and are the predominant active inclusion types in the investigated steel.
doi:10.1080/02670836.2016.1165902 fatcat:7its46zxsnf6xgoeitss7gd42m