Hot Ductility of Nb-V Containing Microalloyed Steel during Solidification

2013 ◽  
pp. 163-170
Author(s):  
Yanhui Sun ◽  
Yanan Zeng ◽  
Kaike Cai
Keyword(s):  
Microalloyed Steel ◽  
Hot Ductility

Impact of Surface Structure Control Cooling During Continuous Casting on Hot Ductility of Microalloyed Steel

2015 ◽  
Vol 87 (7) ◽  
pp. 871-879 ◽  
Author(s):  
Martin Lückl ◽  
Ozan Caliskanoglu ◽  
Sergiu Ilie ◽  
Jakob Six ◽  
Ernst Kozeschnik
Keyword(s):  
Continuous Casting ◽  
Surface Structure ◽  
Microalloyed Steel ◽  
Hot Ductility ◽  
Structure Control

scholarly journals Effects of Sn and Sb on the Hot Ductility of Nb+Ti Microalloyed Steels

Metals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1679
Author(s):  
Chunyu He ◽  
Jianguang Wang ◽  
Yulai Chen ◽  
Wei Yu ◽  
Di Tang
Keyword(s):  
Laser Scanning ◽  
Microalloyed Steel ◽  
Confocal Laser Scanning Microscope ◽  
Microalloyed Steels ◽  
Confocal Laser ◽  
Hot Ductility ◽  
High Temperature Mechanical Properties ◽  
Ductility Trough ◽  
Gleeble 3500 ◽  
Fracture Morphologies

Referencing the composition of a typical Nb+Ti microalloyed steel (Q345B), two kinds of steels, one microalloyed with Sn and Sb, and the other one only microalloyed with Sb were designed to study the effects of Sn and Sb on the hot ductility of Nb+Ti microalloyed steels. The Gleeble-3500 tester was adopted to determine the high-temperature mechanical properties of the two test steels. Fracture morphologies, microstructures and interior precipitation status were analyzed by SEM, CLSM (Confocal laser scanning microscope) and EDS, respectively. Results revealed that within the range of 950–650 °C, there existed the ductility trough for the two steels, which were mainly attributed to the precipitation of TiN and Nb (C, N). Additionally, precipitation of Sn and Sb were not observed in this research and the hot ductility was not affected by the addition of Sn and Sb, as compared with the Nb+Ti microalloyed steel. Therefore, addition of a small amount of Sn and Sb (≤0.05 wt.%) to the Nb+Ti microalloyed steel is favorable due to the improvement on corrosion resistance.

scholarly journals Hot ductility behavior of a continuously cast Ti-Nb microalloyed steel

2019 ◽  
Author(s):  
Christian HOFLEHNER ◽  
Coline BEAL ◽  
Christof SOMMITSCH ◽  
Jakob SIX ◽  
Sergio ILIE
Keyword(s):  
Microalloyed Steel ◽  
Hot Ductility ◽  
Continuously Cast ◽  
Nb Microalloyed Steel

Influence of Thermal History on the Hot Ductility of Ti-Nb Microalloyed Steels

2016 ◽  
Vol 879 ◽  
pp. 199-204 ◽  
Author(s):  
Coline Beal ◽  
Ozan Caliskanoglu ◽  
Christof Sommitsch ◽  
Sergiu Ilie ◽  
Jakob Six ◽  
...  
Keyword(s):  
Thermal Cycle ◽  
Crack Formation ◽  
Microalloyed Steel ◽  
Casting Process ◽  
Testing Temperature ◽  
Microalloyed Steels ◽  
Hot Ductility ◽  
Thermal Treatments ◽  
Continuous Casting Process ◽  
Nb Microalloyed Steel

The hot ductility of Ti-Nb microalloyed steel has been investigated to evaluate the sensitivity to surface crack formation during the continuous casting process. Tensile samples were subjected to different thermal treatments and were tested at deformation temperatures ranging from 650°C to 1000°C using a strain rate of 10-3s-1. It has been found, that the investigated steel evinced poor ductility over almost the whole testing temperature range characterized by marked grain boundary cracking, irrespective of which thermal cycle has been utilized or whether the samples have been melted or only reheated. Microstructural examinations and supplementary thermo-kinetic computer simulations revealed distinct Ti-Nb precipitation throughout the microstructure being responsible for the deteriorated materials hot ductility.

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