Characterization of the nucleation and growth behavior of copper precipitates in low-carbon steels

2004 ◽  
Vol 35 (8) ◽  
pp. 2323-2329 ◽  
Author(s):  
Michael S. Gagliano ◽  
Morris E. Fine
Metals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 862 ◽  
Author(s):  
Maribel Arribas ◽  
Teresa Gutiérrez ◽  
Eider Del Molino ◽  
Artem Arlazarov ◽  
Irene De Diego-Calderón ◽  
...  

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.


2010 ◽  
Vol 8 (1) ◽  
pp. 12 ◽  
Author(s):  
A. Verma ◽  
K. Gopinath ◽  
B. Sarkar

 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. 


2002 ◽  
Vol 17 (9) ◽  
pp. 2251-2259 ◽  
Author(s):  
L. Zhang ◽  
C. C. Zhang ◽  
Y. Y. Wang ◽  
X. X. Liu ◽  
G. G. Wang

A two-dimensional cellular automaton model was developed for the simulation of nucleation and growth of ferrite grains at various cooling rates in low-carbon steels. The model calculates the diffusion of the solute and temperature fields in an explicit finite method and incorporates local temperature and concentration changes into a nucleation or growth function, which is utilized by the automaton in a probabilistic fashion. The modeling provides an efficient way to understand how those physical processes dynamically progress and affect nucleation and growth of ferrite grains.


2011 ◽  
Vol 509 ◽  
pp. S384-S388 ◽  
Author(s):  
Taeg-Woo Lee ◽  
Sung-Il Kim ◽  
Moon-Hi Hong ◽  
Won-Yong Kim ◽  
Sung-Hwan Lim

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

1995 ◽  
Vol 92 (4) ◽  
pp. 511-516
Author(s):  
C. Nuss ◽  
A. Gaggioli ◽  
J. P. Ritt ◽  
H. Gaye ◽  
Y. Zbaczyniak ◽  
...  

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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