Effect of Cooling Condition after Warm Rolling on the Development of Microstructure and Texture in an ELC Steel

2005 ◽  
Vol 105 ◽  
pp. 259-264
Author(s):  
Arunansu Haldar ◽  
R.K. Ray ◽  
A.J. Khan
Keyword(s):  
Low Temperatures ◽  
Low Carbon Steel ◽  
Warm Rolling ◽  
The Other ◽  
Texture Development ◽  
Low Carbon ◽  
Deformation Bands ◽  
Cooling Conditions ◽  
Different Temperatures ◽  
Rolling Temperatures

The microstructure and texture development in an extra low carbon steel during warm rolling (~ 80%) in a single pass at four different temperatures and at two different cooling conditions were studied. The g fibre texture develops at lower warm rolling temperatures (500 °C and 600 °C) and a very weak a fibre develops at higher rolling temperatures (700 °C and 800 °C). Very little or no difference in microstructure and texture development was observed under two cooling conditions at four rolling temperatures. No significant effect of cooling rates could be found at higher temperatures of rolling due to very fast static recrystallisation after rolling which also caused the weakening of texture. On the other hand deformation bands produced at low temperatures rolling helped in forming strong g fibre textures.

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.

scholarly journals Impact of Warm Rolling Process Parameters on Crystallographic Textures, Microstructure and Mechanical Properties of Low-Carbon Boron-Bearing Steels

Metals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 927 ◽  
Author(s):  
Mandana Zebarjadi Sar ◽  
Silvia Barella ◽  
Andrea Gruttadauria ◽  
Davide Mombelli ◽  
Carlo Mapelli
Keyword(s):  
Mechanical Properties ◽  
Microstructural Analysis ◽  
Low Carbon Steel ◽  
Rolling Process ◽  
Warm Rolling ◽  
Low Carbon ◽  
Different Temperatures ◽  
High Boron ◽  
Experimental Trials ◽  
Boron Steels

The effect of the warm rolling process on the microstructure and the mechanical properties of low-carbon high-boron steels are studied in this work. To investigate these effects, boron-bearing low-carbon steel, subjected to roll at three different temperatures, was studied symmetrically and asymmetrically. The results of the experimental trials achieved by mechanical and microstructural analysis revealed that the use of warm rolling can represent a favorable method to suppress strain aging completely, and to eliminate the fluting effect and yield point elongation. In addition, the tensile and elongation properties are modified with the formation of boron nitride precipitates and dislocations in different thermomechanical conditions.

Crystallographic Texture Control Helps Improve Pipeline Steel Resistance to Hydrogen-Induced Cracking

2010 ◽  
Author(s):  
V. Venegas ◽  
O. Herrera ◽  
F. Caleyo ◽  
J. M. Hallen ◽  
T. Baudin
Keyword(s):  
Grain Boundaries ◽  
Crystallographic Texture ◽  
Pipeline Steel ◽  
Low Carbon Steel ◽  
Rolling Process ◽  
Warm Rolling ◽  
American Petroleum Institute ◽  
Low Carbon ◽  
Steel Rolling ◽  
Hydrogen Induced Cracking

Low-carbon steel specimens, all within API (American Petroleum Institute) specifications, were produced following different thermomechanical paths. After austenization, the samples were rolled and recrystallized. The rolling process was carried out using different reduction-in-thickness degrees and finishing temperatures. The investigated steels showed similar microstructural features but differed considerably in their crystallographic textures and grain boundary distributions. After cathodic hydrogen charging, hydrogen-induced cracking (HIC) was detected in the hot-rolled recrystallized steels, whereas the cold and warm-rolled recrystallized steels proved resistant to this damage. Among the investigated specimens, the HIC-stricken show either the strongest {001}ND texture fiber, the smallest fraction of low-angle grain boundaries, or the weakest {111}ND (γ) texture fiber ({hkl}ND representing crystallographic orientations with {hkl} planes parallel to the steel rolling plane). In contrast, the HIC-resistant steels show the weakest {001}ND texture fiber, the largest fraction of low-angle grain boundaries, and the strongest γ fiber. These results support the hypothesis of this and previous works, that crystallographic texture control, through warm rolling schedules, helps improve pipeline steel resistance to hydrogen-induced cracking.

scholarly journals Optimization of two-stage cooling conditions for wire rod diameter 5.5–6.5 mm of low-carbon steel grades in order to ensure the required degree of descaling mechanically before its subsequent processing

2018 ◽  
pp. 63-66
Author(s):  
V. V. Savinkov ◽  
I. A. Kovaleva
Keyword(s):  
Carbon Steel ◽  
Low Carbon Steel ◽  
Air Cooling ◽  
Low Carbon ◽  
Optimal Thickness ◽  
Wire Rod ◽  
Mechanical Removal ◽  
Cooling Conditions ◽  
Steel Grades ◽  
The Wire

With the aim of obtaining scale with a high degree possibility of mechanical removal under the conditions of the section rolling shop No. 1, at the mill «150» JSC «Belarusian Metallurgical Works – Management Company of Holding «BMC» developed technological modes of production of wire rods made of low-carbon steel grades.The peculiarities of scale formation were studied, namely, the factors influencing the removability, obtaining the optimal thickness and its phase components on the wire rod diameter 5.5–6.5 mm in the cooling process immediately after rolling, intended for wire production.To obtain the necessary ratio of the phase constituents of the scales on the surface of the wire rod, the following factors was taken into account: the temperature of the layout of the turns on the roller table in the air cooling line; (uniformity along the length of the turn), the cooling conditions of the helix of the turns (prevention of the 4FeO = Fe3O4-Fe decay), where the condition of cooling the wire rod from 600 to 250 °С, not exceeding 100 s, must be observed.The results of metallographic studies of scale on the wire surface are presented. The introduced technological regimes provided the optimal thickness and the FeO / Fe3O4 ratio after the experimental rolling of the metal. Exhausted cooling regimes allowed to reduce the consumption of fiber for all types of wire.

Effect of Rolling Temperature, Reduction and Alloying Additions on the Texture of Warm Rolled Steels

2005 ◽  
Vol 495-497 ◽  
pp. 501-506 ◽  
Author(s):  
M. Sánchez-Araiza ◽  
Stéphane Godet ◽  
John J. Jonas
Keyword(s):  
Cold Rolling ◽  
Heating Rate ◽  
Warm Rolling ◽  
Carbon Steels ◽  
Rolling Temperature ◽  
Rolling Reduction ◽  
Low Carbon ◽  
Cold Rolling Reduction ◽  
Noticeable Improvement ◽  
Rolling Temperatures

The effect of warm and cold rolling parameters on the development of annealing textures was studied in two low carbon steels containing additions of chromium. Two warm rolling temperatures (640 and 700°C) were employed together with a reduction of 65%. The effects of an additional cold rolling reduction of 40% and of decreasing the heating rate during annealing were also studied. The ND fiber, <111>//ND, of the recrystallization texture was strengthened as the warm rolling temperature was decreased. However, all the warm rolled steels contained a retained RD fiber, <110>//RD. A noticeable improvement in both the continuity and intensity of the ND fiber was obtained when the sample was submitted to an additional 40% cold rolling reduction. The ND fiber was even more continuous and intense when a low heating rate was utilized, yielding r-values of 1.1 and 1.3 for the warm rolled and warm plus cold rolled samples, respectively.

The Application of 3D-EBSD for Investigating Texture Development in Metals and Alloys

2011 ◽  
Vol 702-703 ◽  
pp. 469-474
Author(s):  
Michael Ferry ◽  
M. Zakaria Quadir ◽  
Nasima Afrin Zinnia ◽  
Lori Bassman ◽  
Cassandra George ◽  
...  
Keyword(s):  
Focused Ion Beam ◽  
Electron Backscatter Diffraction ◽  
Ion Beam ◽  
Low Carbon Steel ◽  
Texture Development ◽  
Data Generation ◽  
Low Carbon ◽  
Resolution Electron ◽  
Multi Phase ◽  
Backscatter Diffraction

A focused ion beam (FIB) coupled with high resolution electron backscatter diffraction (EBSD) has emerged as a useful tool for generating crystallographic information in reasonably large volumes of microstructure. In principle, data generation is reasonably straightforward whereby the FIB is used as a high precision serial sectioning device for generating consecutive milled surfaces suitable for mapping by EBSD. However, there are several challenges facing the technique including the need for accurate reconstruction of the EBSD slice data and the development of methods for representing the myriad microstructural features of interest including, for example, orientation gradients arising from plastic deformation through to the structure of grains and their interfaces in both single-phase and multi-phase materials. This paper provides an overview of the use of 3D-EBSD in the study of texture development in alloys during deformation and annealing and includes an update on current research on the crystallographic nature of microbands in some body centred and face centred cubic alloys and the nucleation and growth of grains in an extra low carbon steel.

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