The crack generation and propagation during γ→α transformation in Nb-microalloyed steel

2020 ◽  
Vol 36 (7) ◽  
pp. 868-876
Author(s):  
Yang Liu ◽  
Yanhui Sun ◽  
Haotian Wu
Keyword(s):  
Microalloyed Steel ◽  
Crack Generation ◽  
Nb Microalloyed Steel

Effect of Controlled Hot Rolling Parameters on Microstructure of a Nb-Microalloyed Steel Sheet

2011 ◽  
Author(s):  
Daavood Mirahmadi Khaki ◽  
Amir Abedi ◽  
Francisco Chinesta ◽  
Yvan Chastel ◽  
Mohamed El Mansori
Keyword(s):  
Hot Rolling ◽  
Steel Sheet ◽  
Microalloyed Steel ◽  
Nb Microalloyed Steel

Microstructure Characteristics in Continuous Cooling Transformation of an Nb Microalloyed Steel

2011 ◽  
Vol 228-229 ◽  
pp. 72-76
Author(s):  
J. H. Yang ◽  
Q. Y. Liu
Keyword(s):  
Microalloyed Steel ◽  
Controlled Rolling ◽  
Controlled Cooling ◽  
Cooling Rates ◽  
Continuous Cooling Transformation ◽  
Microstructure Characteristics ◽  
Continuous Cooling ◽  
Nb Content ◽  
Nb Microalloyed Steel ◽  
Two Stages

Deformation dilatometry has been used to simulate controlled hot rolling followed by controlled cooling of a Nb microalloyed pipeline steels, the microstructure and transformation characteristics in the steel and the effect of deformation on transformation are studied. According to the results of both dilatometry measurements and microstructure observations, the continuous cooling transformation curves (CCT) of the tested steels are constructed. The results show that Nb content and deformation enhance the formation of acicular ferrite; the microstructure of the steel range from PF, QF to AF with increasing of cooling rates from 0.5 to 50°C /s in a two stages controlled rolling and the microstructure revolution is sensitive to cooling rates when it is lower than 5°C /s, however, when the cooling rate increasing further, the microstructure didn’t change very much but M/A constituents in matrix is refined and dispersed.

Effect of transformation texture on the impact toughness of hot-rolled Ti + Nb microalloyed steel

2017 ◽  
Vol 128 ◽  
pp. 86-97 ◽  
Author(s):  
K.N. Sasidhar ◽  
T. Dhande ◽  
N. Javed ◽  
A. Ghosh ◽  
M. Mukherjee ◽  
...  
Keyword(s):  
Impact Toughness ◽  
Microalloyed Steel ◽  
Transformation Texture ◽  
Nb Microalloyed Steel ◽  
Hot Rolled ◽  
The Impact
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