Paper Title:
Evolution of Microstructure and Mechanical Properties of HSLA Strip Steel after Cold Rolling and Annealing
  Abstract

A large testing programme of a strip steel HSLA grade, microalloyed by vanadium, titanium and niobium, was conducted. The experiment was based on combination of cold rolling, recrystallization annealing, mechanical testing, metallographic examinations and TEM analysis. Flat samples with thickness 3.9 mm were rolled in several passes with the total height reduction 5 to 75 %. Afterwards the laboratory mill products were annealed in the vacuum furnace with the protective gas atmosphere consisting of N2+H2. The annealed samples underwent the mechanical testing. The gained results – hardness, yield stress, tensile strength and their ratio, as well as elongation, were summarized in graph in dependence on relative height reduction before annealing. It was confirmed that by a suitable combination of size of previous cold deformation and parameters of the following recrystallization annealing it is possible to influence a complex of mechanical properties of particular strips. Particular trends of strength and plastic properties correspond to each other and they may be utilized for optimization of terms of heat treatment of the investigated HSLA steel in a cold rolling mill. These trends are caused by structure-forming processes (recrystallization, grain coarsening, changes of the state of precipitates) which were documented by micrographs.

  Info
Periodical
Materials Science Forum (Volumes 567-568)
Edited by
Pavel Šandera
Pages
345-348
DOI
10.4028/www.scientific.net/MSF.567-568.345
Citation
M. Janošec, I. Schindler, V. Vodárek, E. Místecký, M. Růžička, "Evolution of Microstructure and Mechanical Properties of HSLA Strip Steel after Cold Rolling and Annealing", Materials Science Forum, Vols. 567-568, pp. 345-348, 2008
Online since
December 2007
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: M. Kolář, Vladivoj Očenášek, J. Uhlíř, Ivana Stulíková, Bohumil Smola, Martin Vlach, V. Neubert, K. Šperlink
Abstract:The influence of plastic deformation and heat-treatment on the precipitation of Al3(Sc, Zr) particles and the effect of these precipitates...
357
Authors: Dalibor Vojtěch, Alena Michalcová
Abstract:Nearly equi-atomic Ni-Ti alloys (nitinol) show shape memory behavior, superelasticity, high strength, excellent corrosion resistance and...
471
Authors: Hiba Azzeddine, Djamel Bradai
Chapter 3: Deformation and Annealing
Abstract:The texture and microstructure after hot rolling and annealing of WE54 alloy was investigated using X-ray techniques and optical microscopy....
453
Authors: Jing Yuan Li, Jia Fei Wang, Dong Liang Zhang, Xin Kui Wang
Abstract:The microstructure, texture and basic stamping properties of AZ31 magnesium sheet are studied in this paper with optical microscopy (OM),...
101
Authors: Hong Mei Zhang, Li Feng Qiao
Chapter 1: Materials Engineering. Technologies and Processing
Abstract:The hot rolling, cold rolling and simulative continuous annealing experiments were carried out in the laboratory on the base of new type SFG...
613