Texture Evolution in a Warm-Rolled Ti-IF Steel During Cold Rolling and Annealing

Guo, Yanhui; Wang, Zhaodong; Xu, Jian; Wang, Guodong; Li, Xianghua

doi:10.1007/s11665-008-9304-7

Cited by 10 publications

(6 citation statements)

References 24 publications

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“…Jonas [7] reported that warm rolling has gained in popularity among steelmakers as a means of cutting the cost of steel production and opening up the window of hot band properties. Guan et al [8], Guo et al [9], and Wang et al [10] have reported similar findings using warm rolling. Warm rolling also has an advantage in that beneficial textures can be developed to improve deep drawability, especially in the production of warm-rolled IF steel [11,12].…”

Section: Introductionmentioning

confidence: 61%

Effect of Phosphorus Content on Properties of Warm-Rolled Interstitial-Free Steel Sheets

Guo

Wang

et al. 2013

Metallogr. Microstruct. Anal.

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Microstructures, precipitates, and textures of experimental phosphorus additions to high-strength and traditional Ti-bearing interstitial-free (IF) steels were evaluated by uniaxial tensile test, transmission electron microscope and electron backscatter diffraction. The results show that IF steel is strengthened significantly by addition of phosphorus. Yield strength increases by 60 MPa, from 105 to 165 MPa; and tensile strength increases by 80 MPa, from 245 to 325 MPa. Phosphorus impairs formability while improving strength. Elongation, n value (work hardening), and r value (transverse strain/ vertical anisotropy) are decreased from 50%, 0.31, and 1.75 to 40%, 0.25, and 1.38, respectively. Research shows that phosphorus degradation in steel is due to two mechanisms: (1) high-temperature aging and formation of FeTiP particles, and (2) solid-solution strengthening and the role FeTiP particles play in blocking nucleation and growth of textures in the {111} orientation. This results in a weak, annealed {111} texture, so that the r value decreases.

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Section: Introductionmentioning

confidence: 61%

Effect of Phosphorus Content on Properties of Warm-Rolled Interstitial-Free Steel Sheets

Guo

Wang

et al. 2013

Metallogr. Microstruct. Anal.

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“…% C. It was found that the 0.016 wt. % C sample had a microstructure of as-casted ferrite grain of ultra low carbon steel [13][14][15]. As seen in Figure 6b, the grain size is smaller and more homogenuous owing to rolling and annealing processes.…”

Section: Resultsmentioning

confidence: 99%

Decarburization of Molten Iron Under Reduced Pressure

Bui

Nguyen

2012

AEJ

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in molten iron, especially at ultra low level of carbon content. In order to achieve this, it is required a reduced pressure or vacuum atmosphere or a combination of both with a low oxygen source. From this point of view, the paper presents an experimental work of decarburization of molten iron with oxygen in air under reduced pressure. The investigation was performed in the range of 1623-1723K from 0-120 minutes. The results show a high decarburization of molten iron. The carbon content decreased to 0.016 weight percent (wt. %) after 120 min at 1723 K. In the present work, reaction constant for the decarburization at 1673 K and 1723 K were calculated as 0.0252 min-1 and 0.0470 min-1, respectively. Optical microscopy observation of the sample containing 0.016 wt. % carbon showed a typical ferrite microstructure of ultra low carbon steels. It was concluded that decarburization of molten iron could be conducted in reduced atmosphere to lower the carbon content to an ultra low level.

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“…Present results are also in agreement with the previous work [19] from laboratory experiments that the lowering finishing temperature improves the deformation texture with an increasing amount of {111} oriented grains which supports the formation of a sharper {111} recrystallised texture after coiling. Alpha orientation rotates to gamma orientation, leading to a high intensity of gamma fibre texture during cold rolling and therefore FR1 sample having relatively higher alpha fibre is expected to yield higher gamma fibre before annealing.…”

Section: Comparison Of Austenitic and Ferritic Rolled Coilsmentioning

confidence: 99%

Development of an industrial ferritic rolling process for IF grade steel

Kumar

Sambandam

Kuruveri

2020

Ironmaking & Steelmaking

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Interstitial free (IF) grade steels have high transformation temperatures and often results in nonuniform rolling and lower yields. In the present work, industrial ferritic rolling process is developed, where finish rolling is carried out below the Ar1 temperature for the IF grade steel. Offline simulation was carried out using a hot strip mill model (HSMM) software and full-scale ferritic rolling was carried out in a seven-stand hot strip mill under two different finishing and coiling temperatures and compared with austenitic rolling. Furnace drop-out temperature, mill speed and inter-stand cooling were controlled to achieve the desired low rolling temperatures. Both ferritic rolled coils had strained elongated grains and well-developed alpha (<110>//RD) and gamma (<111>//ND) textures. The lower finishing and coiling temperature processed coil shows higher microstructural and textural variation along with the thickness. This work established the optimum parameters for the industrial ferritic rolling process for IF grade steel.

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Texture Evolution in a Warm-Rolled Ti-IF Steel During Cold Rolling and Annealing

Cited by 10 publications

References 24 publications

Effect of Phosphorus Content on Properties of Warm-Rolled Interstitial-Free Steel Sheets

Effect of Phosphorus Content on Properties of Warm-Rolled Interstitial-Free Steel Sheets

Decarburization of Molten Iron Under Reduced Pressure

Development of an industrial ferritic rolling process for IF grade steel

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