scholarly journals TEM Characterization of the Recrystallization Behaviour of Warm Rolled Low Carbon Steels Containing Chromium during the Early Stages of Annealing

2005 ◽  
Vol 45 (6) ◽  
pp. 867-875 ◽  
Author(s):  
I. B. TIMOKHINA ◽  
J. J. JONAS ◽  
E. V. PERELOMA
Keyword(s):  
Carbon Steels ◽  
Low Carbon ◽  
Low Carbon Steels ◽  
Early Stages ◽  
Tem Characterization

scholarly journals Austenite Reverse Transformation in a Q&P Route of Mn and Ni Added Steels

Metals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 862 ◽  
Author(s):  
Maribel Arribas ◽  
Teresa Gutiérrez ◽  
Eider Del Molino ◽  
Artem Arlazarov ◽  
Irene De Diego-Calderón ◽  
...  
Keyword(s):  
Microstructure Evolution ◽  
Microstructural Characterization ◽  
Carbon Steels ◽  
Reverse Transformation ◽  
Low Carbon ◽  
Effective Mechanism ◽  
Low Carbon Steels ◽  
Heat Treated ◽  
Final Microstructure

In this work, four low carbon steels with different contents of Mn and Ni were heat treated by quenching and partitioning (Q&P) cycles where high partitioning temperatures, in the range of 550 °C–650 °C, were applied. In order to elucidate the effect of applying these high partitioning temperatures with respect to more common Q&P cycles, the materials were also heat treated considering a partitioning temperature of 400 °C. The microstructure evolution during the Q&P cycles was studied by means of dilatometry tests. The microstructural characterization of the treated materials revealed that austenite retention strongly depended on the alloy content and partitioning conditions. It was shown that the occurrence of austenite reverse transformation (ART) in the partitioning stage in some of the alloys and conditions was a very effective mechanism to increase the austenite content in the final microstructure. However, the enhancement of tensile properties achieved by the application of high partitioning temperature cycles was not significant.

scholarly journals Boron Steel: An Alternative for Costlier Nickel and Molybdenum Alloyed Steel for Transmission Gears

2010 ◽  
Vol 8 (1) ◽  
pp. 12 ◽  
Author(s):  
A. Verma ◽  
K. Gopinath ◽  
B. Sarkar
Keyword(s):  
Mechanical Properties ◽  
Precipitation Hardening ◽  
Carbon Steels ◽  
Alloyed Steel ◽  
Alloying Elements ◽  
Boron Steel ◽  
Low Carbon ◽  
Low Carbon Steels

 Case Carburized (CC) low carbon steels containing Ni, Cr and Mo alloying elements are widely used for transmission gears in automobile, as it possesses desired mechanical properties. In order to cut cost and save scarce materials like Ni and Mo for strategic applications, steel alloyed with Boron has been developed, which gives properties comparable to Ni-Cr-Mo alloyed steel. In the process of steel development, care was taken to ensure precipitation of boron which results in precipitation hardening. The characterization of the developed boron steel had exhibited properties comparable to Ni-Cr-Mo alloyed steel and superior to conventional boron steel. 

Structural characterization of nano-scale precipitates in Cu bearing extra-low-carbon steels

2011 ◽  
Vol 509 ◽  
pp. S384-S388 ◽  
Author(s):  
Taeg-Woo Lee ◽  
Sung-Il Kim ◽  
Moon-Hi Hong ◽  
Won-Yong Kim ◽  
Sung-Hwan Lim
Keyword(s):  
Structural Characterization ◽  
Carbon Steels ◽  
Low Carbon ◽  
Low Carbon Steels ◽  
Nano Scale

Relationship between Microstructure and Texture Development during the Early Stages of Annealing in Warm Rolled Low Carbon Steels

2005 ◽  
Vol 500-501 ◽  
pp. 795-802
Author(s):  
Ilana B. Timokhina ◽  
John J. Jonas ◽  
Simon P. Ringer ◽  
S. Bulcock ◽  
Elena V. Pereloma
Keyword(s):  
Volume Fraction ◽  
Shear Bands ◽  
Low Carbon Steel ◽  
Warm Rolling ◽  
Carbon Steels ◽  
Texture Development ◽  
Low Carbon ◽  
Phosphorus Addition ◽  
Low Carbon Steels ◽  
Early Stages

The influence of chromium and phosphorus addition on the microstructure and on texture development was studied during the early stages of the annealing of warm rolled, low carbon steels. The addition of alloying elements led to an increase in the volume fraction of grains containing both shear bands and microbands. Moreover, the alloyed steels displayed lower stored energies and dislocation densities compared with an unalloyed low carbon steel. Two types of carbides were present after warm rolling in the steels containing the alloying additions: (i) coarse carbides; and (ii) fine strain-induced particles. These microstructural differences affected the development of texture during annealing.

Characterization of Transformation Stasis in Low-Carbon Steels Microalloyed with B and Mo

2014 ◽  
Vol 45 (13) ◽  
pp. 5990-5996 ◽  
Author(s):  
Tadashi Furuhara ◽  
Kenji Tsuzumi ◽  
Goro Miyamoto ◽  
Takafumi Amino ◽  
Genichi Shigesato
Keyword(s):  
Carbon Steels ◽  
Low Carbon ◽  
Low Carbon Steels

Kinetics of decarburization in the RH degasser at Sollac Dunkerque

1995 ◽  
Vol 92 (4) ◽  
pp. 511-516
Author(s):  
C. Nuss ◽  
A. Gaggioli ◽  
J. P. Ritt ◽  
H. Gaye ◽  
Y. Zbaczyniak ◽  
...  
Keyword(s):  
Treatment Time ◽  
Gas Analysis ◽  
Carbon Steels ◽  
Low Carbon ◽  
Low Carbon Steels ◽  
Rh Process ◽  
Kinetics Of ◽  
Boiling Mechanism

At Sollac-Dunkerque, a characterization of the present RH process for production of ultra-low carbon steels was performed. A study of the decarburization kinetics was possible thanks to gas analysis. As a first result, the treatment time can safely be reduced by three minutes. Moreover, in the ultra-low carbon range, the decarburization kinetics is strongly slowed down due to the suppression of the boiling mechanism.

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