scholarly journals Precipitation model in microalloyed steels both isothermal and continuous cooling conditions

2015 ◽  
Vol 51 (4) ◽  
pp. e056 ◽  
Author(s):  
Sebastián F. Medina ◽  
Alberto Quispe ◽  
Manuel Gómez
Keyword(s):  
Microalloyed Steels ◽  
Continuous Cooling ◽  
Cooling Conditions ◽  
Precipitation Model

Ferritic Microstructures

2015 ◽  
pp. 113-131
Keyword(s):  
Carbon Atom ◽  
Cooling Rate ◽  
Classification System ◽  
Acicular Ferrite ◽  
Carbon Steels ◽  
Atom Diffusion ◽  
Continuous Cooling ◽  
Cooling Conditions ◽  
Induced Changes

This chapter describes the ferritic microstructures that form in carbon steels under continuous cooling conditions. It begins with a review of the Dubé classification system for crystal morphologies. It then explains how cooling-rate-induced changes involving carbon atom diffusion and the associated rearrangement of iron atoms produce the wide variety of morphologies and microstructures observed in ferrite. The chapter also describes a classification system developed specifically for ferritic microstructures and uses it to compare common forms of ferrite, including polygonal or equiaxed ferrite, Widmanstatten ferrite, quasi-polygonal or massive ferrite, acicular ferrite, and granular ferrite.

Prediction of Ferrite Transformation in Nb-Containing Microalloyed Steels during Continuous Cooling

2011 ◽  
Vol 189-193 ◽  
pp. 1137-1141
Author(s):  
Bing Yun ◽  
Jian Zhi Sun ◽  
Jian Lin Sun ◽  
Xiao Lei Dong
Keyword(s):  
Computer Simulation ◽  
Grain Size ◽  
Nucleation And Growth ◽  
Microalloyed Steels ◽  
Growth Theory ◽  
Transformation Behavior ◽  
Continuous Cooling ◽  
Ferrite Transformation ◽  
Ferrite Grain Size ◽  
Start Temperature

This paper considers for transformation behavior of Nb microalloyed steels, experiments had demonstrated the effect of Nb was obvious: lowered start temperature of ferrite transformation remarkably and forming more refined ferrite grain size. In this study, computer simulation of Nb-containing steels transformation during continuous cooling was carried out by adopting a classical nucleation and growth theory, the model was derived based on the theories and the experimental results, and the calculated start temperatures of ferrite transformation were compared with the results of experimental.

A study of bainite transformation in a new CrMoV steel under continuous cooling conditions

2005 ◽  
Vol 53 (5) ◽  
pp. 559-564 ◽  
Author(s):  
C. Gupta ◽  
G.K. Dey ◽  
J.K. Chakravartty ◽  
D. Srivastav ◽  
S. Banerjee
Keyword(s):  
Bainite Transformation ◽  
Continuous Cooling ◽  
Cooling Conditions

Phase transformations in WB36 heat resistant steel under continuous cooling conditions

2013 ◽  
Vol 17 (sup1) ◽  
pp. 267-271
Author(s):  
D. T. Zhang ◽  
Z. X. Qiao ◽  
X. Yang ◽  
B. Q. Ning ◽  
Y. C. Liu ◽  
...  
Keyword(s):  
Phase Transformations ◽  
Resistant Steel ◽  
Heat Resistant Steel ◽  
Continuous Cooling ◽  
Heat Resistant ◽  
Cooling Conditions

Solute partitioning under continuous cooling conditions as a cooling rate indicator

1981 ◽  
Vol 86 (B10) ◽  
pp. 9511-9518 ◽  
Author(s):  
P. I. K. Onorato ◽  
R. W. Hopper ◽  
H. Yinnon ◽  
D. R. Uhlmann ◽  
L. A. Taylor ◽  
...  
Keyword(s):  
Cooling Rate ◽  
Solute Partitioning ◽  
Continuous Cooling ◽  
Cooling Conditions

ANN-based prediction of ferrite fraction in continuous cooling of microalloyed steels

2012 ◽  
Vol 23 (3-4) ◽  
pp. 769-777 ◽  
Author(s):  
Gholamreza Khalaj ◽  
Mahdi Khoeini ◽  
Meysam Khakian-Qomi
Keyword(s):  
Microalloyed Steels ◽  
Continuous Cooling ◽  
Ferrite Fraction
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