Effect of Chemical Composition and Thermomechanical Processing on Texture in Hot Bands of Ti and Ti+Nb Containing Ultra-low Carbon Steels

Yim, S.; Wray, P. J.; Tiitto, K.; Garcia, C. I.; DeArdo, A. J.

doi:10.2355/isijinternational.43.1615

Cited by 6 publications

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In e-fiber the peak extends towards {554}͗225͘ and {332}͗113͘. The strong presence of the {111} components in g-fiber is in agreement with the results of RuizAparicio et al 28) and Yim et al 9) who studied Nb/Ti and Ti alloyed steels after similar casting and hot rolling schedules as used in this work. The origin of this texture is assumed to be the {110}͗100͘ Goss component in deformed austenite, favored by the presence of shear bands created in the large austenitic grains by heavy reductions.…”

Section: Texture ∑ Hot Rolled and Coiled Conditionsupporting

confidence: 81%

Evolution of Texture in Ferritically Hot Rolled Ti and Ti+Nb Alloyed ULC Steels during Cold Rolling and Annealing

et al. 2004

Self Cite

View full text Add to dashboard Cite

The effect of chemical composition and ferritic hot rolling on the formation of texture in the hot rolled and coiled, cold rolled, and cold rolled and annealed ultra-low carbon steels was studied. One of the experimental steels was fully stabilized with respect to carbon, whereas two others were expected to have some carbon in solution under equilibrium conditions. The steels were processed to yield mainly gamma fiber texture intensities in the austenitically hot rolled condition. Three different thermomechanical treatments were applied, including rolling in the ferrite temperature region. After hot rolling and coiling, the steels were cold rolled and annealed. The crystallographic orientations for each condition were presented in the form of socalled skeleton plots along the RD-, TD-and ND-fibers. It was found that the resulting texture in the hot rolled and coiled as well as in the cold rolled and annealed steels was dependent on the degree of recrystallization of the ferritic substructure. A well-advanced state of recrystallization eliminated the detrimental rotated cube component, leaving behind texture with a complete gamma fiber. The average strain ratio, measured for the cold rolled and annealed steels, increased with advancing state of recrystallization and increasing intensity of the {111} ͗110͘ texture component. It was also found that adding 100 ppm of Nb to the Ti alloyed ULC steel increased the average strain ratio by 15 % at a given {111} ͗110͘ texture intensity.KEY WORDS: ultra-low carbon steel; thermomechanical processing; hot rolling; ferritic rolling; cold rolling; annealing; texture; average strain ratio.cube component is drastically reduced. [20][21][22][23] Most of this work has been done by deforming steels solely in the austenitic temperature region. The present work studies the effect of ferritic hot rolling on the evolution of crystallographic orientation in Ti and TiϩNb alloyed ULC steels during hot deformation and coiling as well as during subsequent cold rolling and annealing. The experimental steels were processed to yield an extra large austenitic grain size during reheating, which combined with high reductions per pass are expected to produce mainly gamma fiber intensities in the hot bands that have been subjected to deformation in the austenitic region only. Experimental Procedure Materials and ProcessingThe three steels studied in this work were vacuum induction melted laboratory ingots, the chemical composition of which is given in Table 1. Steels 1 and 2 are alloyed with Ti and Nb, whereas steel 3 has Ti only. According to the stabilization maps developed by Hua et al.,24) steel 1 is fully stabilized with respect to carbon, whereas, under equilibrium, steels 2 and 3 are expected to have some carbon in solution, see Table 2. Most of the carbon is tied in MC (MϭNb and/or Ti) and Ti 4 C 2 S 2 precipitates. It can be seen in Table 2 that, under equilibrium, steel 1 has over half of its Nb content and one fourth of its Ti content in solution, whereas in steels 2 and 3 all Nb and Ti...

show abstract

Section: Texture ∑ Hot Rolled and Coiled Conditionsupporting

confidence: 81%

Evolution of Texture in Ferritically Hot Rolled Ti and Ti+Nb Alloyed ULC Steels during Cold Rolling and Annealing

et al. 2004

Self Cite

View full text Add to dashboard Cite

show abstract

“…hot-rolling conditions, cold reduction, annealing temperature, and heating rate. [14][15][16][17][18][19][20][21][22][23] In the continuous-rolling process of Kawasaki Steel, a hot-rolled (ferritic rolling) Ti-Nb-stabilized IF steel was annealed at 750°C for 30 minutes. The annealed hot band was subsequently cold rolled to 76 pct and continuously annealed in the range of 700°C to 900°C for 40 seconds.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Drawability of Titanium-Stabilized Interstitial-Free Steel by Optimization of Process Parameters and Texture

Banerjee

Verma

Venugopalan

2008

Metall Mater Trans A

View full text Add to dashboard Cite

A detailed study on the effect of cold rolling and annealing temperature on the texture and drawability of Ti-stabilized interstitial-free (IF) steels have been made with a view to achieving high drawability. The presence of shear type and cold-deformation type of textures in the hot bands of 3.8-, 4.3-and 4.5-mm thickness has been attributed to finish rolling below the Ar 3 temperature. The 4.5-mm hot band was selected for further studies as it showed a strong c fiber. Cold rolling of the hot band was done in the range of 60 to 90 pct, followed by batch annealing in the range of 660°C to 750°C. For a particular annealing temperature, a maximum in the intensity of 111 f g 110 h icomponent, and in average normal anisotropy, an r m value was observed with the increase in cold reduction, followed by a drop with further cold reduction. The results are discussed in terms of orientation distribution function (ODF), recrystallization behavior, and precipitation of FeTiP, (Ti, Mn) S, and TiC particles. Fine FeTiP-type precipitates in the grains and at the grain boundaries in samples annealed at 660°C, as well as samples associated with (Ti, Mn)S in samples annealed at 750°C, were found to be detrimental for the development of beneficial c fiber and improved drawability, while coarse FeTiP-type precipitates in 80 pct cold-reduced samples annealed at 680°C and 710°C resulted in maximum r m values of 2.29 and 2.25, respectively. The dissolution of TiC at an annealing temperature of 750°C adversely affected drawability due to the solute drag effect of solute carbon. An optimized combination of cold reduction and annealing temperature has been established for achieving a uniform c fiber along with high r m values.

show abstract

“…The cold-rolled material was heated at a rate of 10 °C s À1 and annealed at a temperature range of 800-880 °C for 200 s with a temperature interval of 20 °C. [14][15][16]…”

Section: Process Designmentioning

confidence: 99%

Effect of Strain Localization on the Mechanical Properties from Nonuniform Grain Size Distribution of Ultralow Carbon Steel

Kang

Yoon

2022

steel research int.

View full text Add to dashboard Cite

The effect of the bimodal grain size distribution in the range of several tens of micrometers is studied to investigate the mechanical properties of metallic materials with single‐phase ferritic microstructure. The previous studies on the bimodal distribution of grain size have been performed on materials with nanocrystalline, ultrafine, or multiphase microstructures, and have generally reported that the mixed structure of fine and coarse grains improves the ductility of the material, because the coarser grains preferentially accommodate deformation. However, herein, the coarse grains do not accept the deformation well during plastic deformation and cause nonuniform deformation, which lowers the work hardening coefficient and accelerates necking of sheet. The influence of the bimodal grain size distribution on the mechanical properties is evaluated using tensile and various formability tests. Microstructural changes before and after deformation are tracked by electron backscatter diffraction.

show abstract

Effect of Chemical Composition and Thermomechanical Processing on Texture in Hot Bands of Ti and Ti+Nb Containing Ultra-low Carbon Steels

Cited by 6 publications

References 16 publications

Evolution of Texture in Ferritically Hot Rolled Ti and Ti+Nb Alloyed ULC Steels during Cold Rolling and Annealing

Evolution of Texture in Ferritically Hot Rolled Ti and Ti+Nb Alloyed ULC Steels during Cold Rolling and Annealing

Improvement of Drawability of Titanium-Stabilized Interstitial-Free Steel by Optimization of Process Parameters and Texture

Effect of Strain Localization on the Mechanical Properties from Nonuniform Grain Size Distribution of Ultralow Carbon Steel

Contact Info

Product

Resources

About