Paper Title:
Ultra-Fine Grain Size by Dynamic Recrystallization in Strip Rolling of Nb Microalloyed Steel
  Abstract

The design of base chemistry and optimization of rolling schedule are the two important factors that influence large strain accumulation in multi-pass rolling in order to obtain ultra-fine grain size by dynamic recrystallization. A base chemistry of 0.03C-0.003N-0.08Nb-0.015Ti-1.8Mn (all in weight %) of HTP steel design was chosen in order to control the time evolution of strain induced precipitation of NbC and the strain accumulation through precipitate interaction with recovery and recrystallization at short inter-pass times characteristic of strip rolling. Experimental data on the critical strain for static and dynamic recrystallisation for HTP steel are used in a quantitative model to predict strain accumulation pass by pass and to achieve grain refinement by dynamic recrystallisation through large strain accumulation. The model is used to optimize the time-temperature-deformation schedule to prevent static recrystallization during the inter-pass times and to target ultra-fine grain size through dynamic recrystallization by large strain accumulation. The model predictions are validated by simulation of strip rolling of HTP steel on the thermo-mechanical simulator (WUMSI) to obtain a uniform ultra-fine ferrite grain size of about 1.5 micrometer diameter in final ferrite microstructure.

  Info
Periodical
Materials Science Forum (Volumes 475-479)
Main Theme
Edited by
Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie
Pages
141-144
DOI
10.4028/www.scientific.net/MSF.475-479.141
Citation
S.V. Subramanian, G. Zhu, C. Klinkenberg, K. Hulka, "Ultra-Fine Grain Size by Dynamic Recrystallization in Strip Rolling of Nb Microalloyed Steel", Materials Science Forum, Vols. 475-479, pp. 141-144, 2005
Online since
January 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Yao Man Zhang, Zhi Kun Xie, Yong Xian Liu
Abstract: The linear rolling guideway is one of the most essential parts of the machine tool. So it is very important to analyze the dynamic-static...
510
Authors: Shui Ping Yin, Min Yu
Abstract:The purpose of this work was to investigate the effects of pre-load static load and dynamic load on the visco-elastic in polycarbonate. In...
1090
Authors: Li Jia Chen, Jia Li, Feng Li, Xin Wang
Abstract:Cyclic deformation for two magnesium alloys AZ91 and AM50 with different processing status has been performed under total strain amplitude...
90
Authors: Xi Guang Cui, Hai Dong Xu
Chapter 1: Structural Engineering
Abstract:Considering the strain rate then puts forward the modified uniaxial dynamic constitutive model related to strain rate in concrete-filled...
220
Authors: An He, Lin Chen, Shuo Wang, Le Xiao Huangfu
Chapter 3: Materials Processing Technology
Abstract:Hot compression deformation test were conducted on 20CrMo alloy steel on a Gleeble-1500D thermal simulator when the deformation amount was...
488