Effect of the High-Temperature-Coiling on the Properties of Continuously Annealed Product

Kubotera, Haruo; Nakaoka, Kazuhide; Araki, Kenji; Watanabe, Kaoru; Iwase, Koji

doi:10.2355/tetsutohagane1955.62.7_846

Cited by 7 publications

(6 citation statements)

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“…These are caused by: (a) e present in solid solution during cold rolling, [53][54][55][56] (b) e present in solid solution during annealing, [56][57][58][59] and (c) e present in combined form as cementite or pearlite before cold rolling. 54 ,55,6o Although there has been substantial progress in understanding the effect of C on annealing textures, controversy still exists over the respective contributions of the above factors, since they are sometimes difficult to separate experimentally.…”

Section: Effect Of Interstitial Elementsmentioning

confidence: 99%

Cold rolling and annealing textures in low carbon and extra low carbon steels

Ray¹,

Jonas²,

Hook³

1994

International Materials Reviews

479

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The cold rolling texture of low and extra low carbon steels is primarily made up of a nearly perfect normal direction (NO) fibre and of two other components, centred at {001}<110) and {112}<110), which lie along the rolling direction (RO) fibre. This texture is influenced significantly by the hot band texture and not particularly by such metallurgical parameters as steel chemistry or the presence of precipitates. The annealing of heavily cold rolled materials strengthens the NO fibre and reduces the intensity of the RD fibre. The annealing texture, particularly the strength of the {111} components, depends significantly on the hot band texture and grain size, as well as on coiling temperature, cold reduction, and alloy chemistry. The {111} fibre is particularly beneficial for imparting good deep drawability (high rm value) to sheet steel, whereas the {001} has a detrimental effect. In conventional batch annealed AI-killed steels, cold reductions of around 70%, low coiling temperatures and slow heating rates induce the development of the most desired annealing textures and correspondingly the highest rm values. The optimum cold reduction increases to about 90% in Nb or Ti stabilised interstitial free (IF) steels. Grain growth after recrystallisation increases rm;thus longer annealing cycles and higher annealing temperatures are beneficial, if grain growth occurs. In the case of box annealing, the practical upper limit of annealing temperature is '" 720°C. In the continuous annealing process, which involves higher heating and cooling rates, cold rolled steels can be annealed to advantage in the intercritical y + IX range. Carbon in solution and/or in the form of carbides is the single most deleterious element that impedes the development of sharp {111} annealing textures. Dissolved N, P, and Mn have effects similar to that of carbon. Niobium, Ti, or Si in solid solution enhances the intensity of the {111} or near {111} components.IMR/266

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Section: Effect Of Interstitial Elementsmentioning

confidence: 99%

Cold rolling and annealing textures in low carbon and extra low carbon steels

Ray¹,

Jonas²,

Hook³

1994

International Materials Reviews

479

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“…Kubotera 20) suggested that solute C could affect nucleation behavior in recovery and recrystallization. Namely, nucleation would be delayed by solute C. We can suggest that the delay in recrystallization caused by solute C is one of the factors in ferrite refinement in Steel C-1.…”

Section: Discussionmentioning

confidence: 99%

Effect of Nb Contents on Size of Ferrite Grains and Nb Precipitates in Ultra-low Carbon Steel for Cans

Nakagawa¹,

Tada²,

Kojima³

et al. 2016

ISIJ Int.

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Soft-tempered, fine-grained ferritic steel is preferred for film-laminated steel for drawn cans from the viewpoints of surface quality and high formability. Generally, ultra-low carbon steel (ULC) is soft but has coarse ferrite grains. On the other hand, low carbon steel (LC) has a fine ferrite grain size but is hard and has inferior formability, and thus is not suitable for drawing. In order to solve this problem, the contents of carbon and niobium in ULC steel were varied in order to control the size of niobium carbide precipitates. This study suggested that the newly-developed steel has the potential to have an excellent balance of ferrite grain size and formability.

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“…(6)- (9), respectively. Equation (6) implies that the sum of the slip values γ for each slip system in a crystal is equal to the sum of the micro strains ε ε . Equation (7) gives the relationship between micro stress σ σ and the resolved shear stress τ τ acting on the slip plane.…”

Section: Ultra Low Carbon Steel and Ferritic Stainless Steelmentioning

confidence: 99%

“…5) Second, high-temperature coiling causes the condensation of carbide and sulfide precipitates after coiling. 6) Third, high-reduction hot rolling results the formation of fine-grained hot strips. 7) When such ultra low-carbon hot strips are cold rolled and annealed, preferred {111} oriented grains preferentially grow and the final strips have high Lankford values.…”

Section: Introductionmentioning

confidence: 99%