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Columnar grain growth during annealing prior to cold rolling of non-oriented electrical steels

Gutiérrez Castañeda, E.J. ; Palafox Cantú, C.N. ; Torres Castillo, A.A. ; Salinas Rodríguez, A. ; Deaquino Lara, R. ; Botello Rionda, F. ; Márquez Torres, F. ; García Guillermo, S.

Materials science & engineering. B, Solid-state materials for advanced technology, 2019-04, Vol.243, p.8-18 [Periódico revisado por pares]

Lausanne: Elsevier B.V

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  • Título:
    Columnar grain growth during annealing prior to cold rolling of non-oriented electrical steels
  • Autor: Gutiérrez Castañeda, E.J. ; Palafox Cantú, C.N. ; Torres Castillo, A.A. ; Salinas Rodríguez, A. ; Deaquino Lara, R. ; Botello Rionda, F. ; Márquez Torres, F. ; García Guillermo, S.
  • Assuntos: Annealing ; Cold rolling ; Columnar growth ; Crystallographic texture ; Crystallography ; Cube texture ; Decarburization ; Decarburizing ; Electrical steels ; Grain growth ; Grain structure ; Heat treating ; JMatPro simulation ; Microstructure ; Nucleation ; Phase transformation ; Phase transitions
  • É parte de: Materials science & engineering. B, Solid-state materials for advanced technology, 2019-04, Vol.243, p.8-18
  • Descrição: [Display omitted] •Intercritical annealing modifies grain structure and texture of hot-rolled bands.•Decarburization and isothermal γ-Fe → α-Fe transformation assist columnar grain growth.•Decarburization rate affects the driving force needed for columnar grain growth.•Bain and Kurdjumov-Sachs correspondence relationships may explain changes in texture.•Deformation texture is also modified: α and γ fibers weaken and θ-fibre strengthens. The present research reports the microstructural factors that favor the development of columnar grains during annealing prior to cold rolling (APCR). Results show that decarburization of steel has a strong effect on phase transformations, grain structure and crystallographic texture. Annealing at 850 °C (two-phase field) promotes the development of columnar-grained microstructures with orientations close to the ideal cube texture. Higher annealing temperatures within the intercritical region, results in a mixture of columnar + equiaxial grains (875 °C) or completely equiaxial-grained microstructures (900 °C). Annealing at temperatures within the single ferrite (700 °C, 750 °C) or austenite (950 °C, 1050 °C) phase fields does not promote the development of columnar grains. In these cases, annealing promotes the development of equiaxial grains with rotated cube texture and orientations along the γ-fibre. Changes in texture produced by APCR are consistent with the Bain and Kurdjumov-Sachs correspondence relationships and occur according to oriented nucleation and selective growth mechanisms depending on the characteristics of decarburization.
  • Editor: Lausanne: Elsevier B.V
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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