Influence of Hot Deformation Conditions on the Annealing Behaviour of Cold Rolled Ultra Low Carbon Steel

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概要

• 論文の詳細を見る

• An ultra low carbon (ULC) steel has been deformed in plane strain compression (PSC) using a Gleeble 3500 thermal and mechanical simulator followed by cold rolling and annealing (CRA). Multiple-pass deformation was used to simulate conditions encountered during hot rolling and to study the effect of finish deformation temperature (FDT) on microstructural development during CRA. It was found that a range of ferrite microstructures were produced when FDT decreased from 920 to 600°C, a temperature range which encompasses both austenite (γ) and ferrite (α) deformation. For FDT>870°C, fine equiaxed ferrite was produced, whereas FDT 850°C produced a coarse-grained microstructure. As FDT was decreased below 850°C, as-deformed ferrite remained with a decreasing propensity for the formation of statically recrystallized grains. At higher FDT, the γ-to-α transformation produced a hot-band texture consisting mainly of {001}<110>, and at FDT below the critical transformation temperature the typical body centred cubic rolling texture also developed. Sections of the as-hot-deformed samples were cold rolled to 80% reduction and annealed at 650°C. It was found that the hot deformation microstructure has a strong influence both on the kinetics of recrystallization and texture development during CRA. In particular, a warm-deformed ferrite microstructure (lower FDT) recrystallized most rapidly to produce a strong <111>//ND recrystallization texture (γ-fibre), whereas an initial coarse-grained ferrite microstructure recrystallized most sluggishly to produce a strong {001}<110> texture. The implications of these results in the production of formable sheet steels is outlined.

• 社団法人 日本鉄鋼協会の論文
• 2001-08-15

著者

• YU D.

  Department of Materials Engineering, The University of Wollongong

• CHANDRA T.

  Department of Materials Engineering, University of Wollongong

• FERRY M.

  School of Materials Science and Engineering, University of New South Wales

• Ferry M.

  School Of Materials Science And Engineering University Of New South Wales

• Chandra T.

  Department Of Materials Engineering University Of Wollongong

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• Effect of Large Particles and Fine Precipitates on Recrystallization and Transformation Behaviour of Ti Treated Low Carbon TiO Steel
• Five Decades of the Zener Equation
• Prediction of Ferrite Grain Size after Warm Deformation of Low Carbon Steel
• Recrystallization Kinetics of Low and Ultra Low Carbon Steels during High-rate Annealing
• Decomposition of Coarse Grained Austenite During Accelerated Cooling of C-Mn Steels
• Continuous Cooling Transformation Behaviour of High Strength Microalloyed Steels for Linepipe Applications
• Influence of Hot Deformation Conditions on the Annealing Behaviour of Cold Rolled Ultra Low Carbon Steel

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