Transformation Behavior of Austenite Continuous Cooling of Nb-V Micro-Alloyed Low Carbon Steel

2013 ◽  
Vol 668 ◽  
pp. 840-843
Author(s):  
Jun Cheng Bao ◽  
Jun Xing Ma ◽  
Jie Zhao ◽  
Bao Qun Ning
Keyword(s):  
Carbon Steel ◽  
Cooling Rate ◽  
Low Carbon Steel ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Metallographic Analysis ◽  
Low Carbon ◽  
Transformation Behavior ◽  
Continuous Cooling ◽  
Cct Diagrams

The transformation behavior of Nb-V micro-alloyed low carbon steel during continuous cooling was studied through thermomechanical simulator and metallographic analysis. The results show that the dynamic CCT diagrams shift to the left and upper compared with the static ones, the begin temperature of γ→α transition is gradually lower with the increase of cooling rate. The high temperature deformation decreases Ferrite transition zone. When the cooling rate is lower, the deformation improves Bainite transition; when the cooling rate is higher, the deformation inhibition Bainite transition.

Transformation Behavior of Austenite Continuous Cooling of Nb-Ti Micro-Alloyed Low Carbon Steel

2013 ◽  
Vol 652-654 ◽  
pp. 967-970 ◽  
Author(s):  
Jun Cheng Bao ◽  
Jun Xing Ma ◽  
Jie Zhao ◽  
Bao Qun Ning
Keyword(s):  
Carbon Steel ◽  
Cooling Rate ◽  
Low Carbon Steel ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Metallographic Analysis ◽  
Low Carbon ◽  
Transformation Behavior ◽  
Continuous Cooling ◽  
Cct Diagrams

The transformation behavior of Nb-Ti micro-alloyed low carbon steel during continuous cooling was studied trough thermomechanical simulator and metallographic analysis. The results show that the dynamic CCT diagrams shift to the left and upper compared with the static ones, the begin temperature of γ→α transformation is gradually lower with the increase of cooling rate. The high temperature deformation improves Ferrite and Pearlite transformation, also improves Bainite transformation and decreases ferrite transformation zone. The rapid cooling can obtain better obdurability mixed microstructure of Martensite and Bainite within a certain cooling rate after deformation.

Hardenability of Medium Carbon Cr-Mn-Mo Alloyed Steels

2019 ◽  
Vol 946 ◽  
pp. 341-345
Author(s):  
Mikhail V. Maisuradze ◽  
Maksim A. Ryzhkov
Keyword(s):  
Cooling Rate ◽  
Structural Steels ◽  
Alloying Elements ◽  
Metallographic Analysis ◽  
Medium Carbon ◽  
Austenite Transformation ◽  
Continuous Cooling ◽  
Different Content ◽  
Cct Diagrams

Three medium carbon Cr-Mn-Mo structural steels with different content of alloying elements were studied. The austenite transformation during continuous cooling was investigated using dilatometer and metallographic analysis. The CCT diagrams were plotted showing the effect of the increased alloying elements content and B and Nb micro-alloying on the hardenability of the studied steels. The hardness dependences on the cooling rate were obtained.

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