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Microstructure evolution in hot H-shape rolling simulated by finite element method
H beams are commonly produced in hot rolling with caliber rolls. Because of the complex section shape of H beam, rolled stock receives non-uniform strain and has distributed temperature, particularly during break down rolling. Break down rolling is the first step of the rolling process of section beams. Microstructural changes in break down rolling of H beams have been investigated in two different roll pass designs by using a visco-plastic finite element code integrated with a microstructure simulation program. The first method using beam blank had dynamic and static recrystallization mainly at its web part. On the other hand, the second pass schedule from rectangular section slab showed more recrystallization at the center of flange part. Austenite grain sizes became smaller with higher recrystallized volume fraction. The grades of grain size distribution were rather great at the end of break down rolling and the patterns of the distributions were noticeably different between the two methods.
Microstructure evolution in hot H-shape rolling simulated by finite element method
H beams are commonly produced in hot rolling with caliber rolls. Because of the complex section shape of H beam, rolled stock receives non-uniform strain and has distributed temperature, particularly during break down rolling. Break down rolling is the first step of the rolling process of section beams. Microstructural changes in break down rolling of H beams have been investigated in two different roll pass designs by using a visco-plastic finite element code integrated with a microstructure simulation program. The first method using beam blank had dynamic and static recrystallization mainly at its web part. On the other hand, the second pass schedule from rectangular section slab showed more recrystallization at the center of flange part. Austenite grain sizes became smaller with higher recrystallized volume fraction. The grades of grain size distribution were rather great at the end of break down rolling and the patterns of the distributions were noticeably different between the two methods.
Microstructure evolution in hot H-shape rolling simulated by finite element method
Entwicklung der Mikrostruktur beim H-Profil-Warmwalzen, simuliert durch die Finite-Elemente-Methode
Takashima, Y. (Autor:in) / Kopp, R. (Autor:in)
2002
6 Seiten, 9 Bilder, 1 Tabelle, 2 Quellen
Aufsatz (Konferenz)
Englisch
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