Effect of intermediate annealing on texture, formability and ridging of 17%Cr ferritic stainless steel sheet

Huh, Moo Young; Engler, Olaf

doi:10.1016/s0921-5093(00)01995-x

Cited by 183 publications

(108 citation statements)

References 37 publications

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“…However, the strongest α-fiber in the center region was developed from the deformation and its already identified presence in the annealed hot-rolled sample. Similar results were reported in the literature for ferritic stainless steel 7,14,15 . For the intermediate annealing route, the previous material was the intermediate sample (Fig.…”

Section: Discussionsupporting

confidence: 92%

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Evaluation of Intermediate Annealing on Nb-Stabilized Ferritic Stainless Steel

Rodrigues

Alcântara²,

Oliveira³

et al. 2017

Mat. Res.

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This study seeks to evaluate the effect of intermediate annealing on the microstructure, texture, and formability of Nb-stabilized ferritic stainless steel. Two routes -direct cold rolling and cold rolling with an intermediate annealing were performed. The total reduction was 80%, 3-0.6 mm and 3-1.2-0.6 mm. The characterization of the samples was conducted using X-ray diffraction, electron backscatter diffraction, and tensile tests to evaluate the formability by the average normal anisotropy coefficient, r ̅ value. The results showed that intermediate annealing promoted the strongest γ-fiber with peak at {111}〈112〉 and weak α-fiber after cold rolling. After the final annealing, it was observed that intermediate annealing reduces the banded microstructure and θ-fiber, and improves the γ-fiber uniformity and the r ̅ value. It is worth noting that the γ-fiber fraction was the same for direct reduction. The increase in r ̅ value was related to the reduction in θ-fiber and the uniformity of texture recrystallization.

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Section: Discussionsupporting

confidence: 92%

“…The FSS are produced by continuous casting, hot rolling, annealing of hot rolling coils, cold rolling, and recrystallization annealing 6 . An intermediate annealing in cold rolling was used to improve the recrystallization texture, increase the {111} plans parallel to the sheet plane (γ-fiber), and reduced the roping defects [7][8][9] .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Intermediate Annealing on Nb-Stabilized Ferritic Stainless Steel

Rodrigues

Alcântara²,

Oliveira³

et al. 2017

Mat. Res.

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“…The connection between roughness with strain and grain size is well established [5,6]. Recent studies have examined the relationships between texture and roughening [7][8][9][10][11], and texture "clustering" and roughening [10]. Researchers at DESY evaluated tube made from plate to take advantage of the benefit of strain processing of the plate to break up the coarse grain billet [2].…”

Section: Comparison Of Accomplishments With the Goals And Objectives mentioning

confidence: 99%

Production of Seamless Superconducting Radio Frequency Cavities from Ultra-fine Grained Niobium, Phase II Final Report

Crooks¹

2009

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“…However, the continuous cast slabs usually contain developed columnar grains with strong ͗001͘ texture parallel to the normal direction (ND), which leads to {001}͗110͘ and {001}͗010͘ textures in the hot rolled bands and cold rolled sheets. [1][2][3][4][5][6][7] Furthermore, unlike in low carbon steel, FSS undergoes no or merely limited gamma-to-alpha phase transformation and recrystallization during hot rolling. Accordingly, the hot bands of FSS usually display pronounced textures and strong through-thickness gradients in both microstructure and texture, which deteriorates the deep drawability and surface quality of final cold rolled and annealed sheets.…”

Section: Introductionmentioning

confidence: 99%

“…Accordingly, the hot bands of FSS usually display pronounced textures and strong through-thickness gradients in both microstructure and texture, which deteriorates the deep drawability and surface quality of final cold rolled and annealed sheets. [6][7][8][9] Strip casting, a "near-net-shape" forming process to bypass hot rolling, is considered to be able to compete with sheet production with conventional continuous casting and thermo-mechanical processing. 10) Extensive work on texture development of strip cast stainless steels has been carried out by Raabe and co-workers, [11][12][13] which indicated that initial textures in the cast strip were nearly random and homogenous through thickness.…”

Section: Introductionmentioning

confidence: 99%

Texture Development and Formability of Strip Cast 17% Cr Ferritic Stainless Steel

Liu¹,

Liu²,

Guo-dong³

2009

ISIJ Int.

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In order to optimize the formability of ferritic stainless steel (FSS), control of the crystallographic texture is essential. In the present work, texture development of cast strips with different initial solidification structure during rolling and subsequent annealing and the formability of final sheets were investigated. Fully equiaxed and columnar grained cast strips of Fe17%Cr FSS were fabricated by a pilot twin-roll strip caster. The equi-axed and columnar grained bars cut from a conventional continuous cast slab were used as comparable specimens. It was shown that in the cold rolled and annealed sheet of fully equi-axed cast strip, uniform and strong g-fiber recrystallization texture was formed and {001}͗110͘ component was almost eliminated. By contrast, the recrystallization texture in the conventional sheets with equi-axed and columnar initial solidification structures exhibited typical shift towards high-index {334}͗483͘, which led to a reduced r-value as compared to that of the equi-axed cast strip. The final annealed sheet of fully columnar cast strip, however, showed weaker g-fiber recrystallization texture and lower r-value than those of conventional sheets. It is, therefore, believed that twin-roll strip casting can improve the formability of 17 % Cr FSS only under the precondition that appropriate solidification structure is obtained.KEY WORDS: ferritic stainless steel; twin-roll strip casting; solidification structure; texture; formability. ent strips in cold rolling and annealing were studied. Equiaxed and columnar bars were cut from a continuous cast slab, and hot rolling, hot band annealing, cold rolling and final recrystallization annealing were performed for both bars to simulate the industrial processes. The texture developments of the two bars were also studied and compared with those of cast strips to understand the evolutions of microstructure, texture and properties in the cast strips. Experimental ProceduresFe17%Cr FSS with a composition of Cr, 16.9; Ni, 0.114; C, 0.03; Mn, 0.154; Si, 0.243; P, 0.016; S, 0.004 (in mass%) was used. Cast strips were produced by using a pilot twinroll strip caster, in which the molten steel was poured into a preheated tundish under Ar shield to flow through a nozzle into the rotated water-cooled rolls.15) The casting speed was set up to be 0.25 m/s and the initial roll gap was set to be 1.5 mm to produce strips with thickness of about 1.8 mm. The pool melt temperature was measured by a thermo-detector installed above the melting pool. In the present work, pool melt superheats were controlled to be about 140 K and 20 K, respectively, to produce fully columnar and fully equi-axed cast strips, Fig. 1. The average diameters of columnar and equi-axed grains were about 400 mm and 200 mm, respectively. Both strips were cold rolled by using a laboratory rolling mill with a thickness reduction of 80 %, and were annealed at 860°C for 2 min.Columnar and equi-axed bars in the size of 250 Lϫ 110 Wϫ45 T (mm) were cut from a cast slab of Cr17 FSS, Fig. 2. The average...

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Effect of intermediate annealing on texture, formability and ridging of 17%Cr ferritic stainless steel sheet

Cited by 183 publications

References 37 publications

Evaluation of Intermediate Annealing on Nb-Stabilized Ferritic Stainless Steel

Evaluation of Intermediate Annealing on Nb-Stabilized Ferritic Stainless Steel

Production of Seamless Superconducting Radio Frequency Cavities from Ultra-fine Grained Niobium, Phase II Final Report

Texture Development and Formability of Strip Cast 17% Cr Ferritic Stainless Steel

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