Simulation of hot rolling deformation at intermediate passes and its industrial validity

Nalawade, R.S.; Puranik, Abhiram; Balachandran, G.; Mahadik, K.N.; Balasubramanian, V.

doi:10.1016/j.ijmecsci.2013.09.017

Cited by 43 publications

(28 citation statements)

References 6 publications

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“…[26][27][28] In the UFC process, at the surface, a number of dislocations are retained and deformation energy is stored, as shown in Figure 17. During the surface reheating process after UFC (i.e., when the heat is transferred from the mid-thickness to the surface and the surface temperature increases, as shown in Figure 16, which corresponds to the holding time in Figure 12), dislocations are paths for diffusion of carbon and provide favorable sites for nucleation of cementite, and the stored deformation energy also provides the necessary driving force for cementite precipitation.…”

mentioning

confidence: 99%

The Relationship Between Microstructural Evolution and Mechanical Properties of Heavy Plate of Low-Mn Steel During Ultra Fast Cooling

Wang

et al. 2015

Metall Mater Trans A

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We describe here the electron microscopy and mechanical property studies that were conducted in an industrially processed 20-and 40-mm C-Mn thick plates that involved a new approach of ultrafast cooling (UFC) together with significant reduction in Mn-content of the steel by~0.3 to 0.5 pct, in relation to the conventional C-Mn steels, with the aim of cost-effectiveness. The study demonstrated that nanoscale cementite precipitation occurred during austenite transformation in the matrix of heavy plate during UFC, providing significant precipitation strengthening. With decrease in UFC stop temperature and consequent increase in the degree of undercooling, there was a transition in the morphology of cementite from lamellar to irregular-shaped nanoscale particles in the 20 mm heavy plate. With the increase in plate thickness, nanoscale cementite precipitated in bainitic lath at the surface of 40 mm heavy plate, which significantly increased the strength and decreased the elongation. Simultaneously, microstructural evolution in hot-rolled sheets was studied via simulation experiments using laboratory rolling mill to define the limits of microstructural evolution that can obtained in the UFC process and develop an understanding of the evolved microstructure in terms of process parameters.

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mentioning

confidence: 99%

The Relationship Between Microstructural Evolution and Mechanical Properties of Heavy Plate of Low-Mn Steel During Ultra Fast Cooling

Wang

et al. 2015

Metall Mater Trans A

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“…According to R S Nalawade, V R Marje, G Balachandran and V Balasubramanian [9] with the use of Finite Element Matrix(FEM) model the deformation behavior of grade 38MnVS6 hot rolled micro-alloyed steel bar was examined. Blooming mill involves the initial process which acts as a function of three different passes schedules which include collar tape angle, groove roll depth, and corner radius.…”

Section: Scrap Reduction In Tmt Reinforced Barmentioning

confidence: 99%

Scrap Reduction in TMT Reinforced Bar Production by the Application of Lean Techniques

K¹,

Shilpa²,

Appaiah³

2019

IJRTE

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Lean aims to eliminate the non-value-added activity which affects the cost of production along with the scrap rate Lean is often considered as a collection of tools and practices for superior operational and financial performance, through process improvement. Lean is an improvement concept for operational performance in the manufacturing environment. In this work, lean techniques are applied to the manufacturing of random rods at a leading manufacturing company of Thermo Mechanically Treated (TMT) reinforced bars to reduce the scrap. The hot billet coming from the extrusion machine is sent to the rolling mill machine where the TMT bars are produced; this consists of three stages – roughing mill, shear cutting, and programming logical controller. During the shear cut operation performed on the billet, a large amount of scrap was being generated. To reduce this scrap and the non-value-added activities, lean techniques have been applied. Also, the size of the billet was changed to produce maximum yield. With this, the scrap rate at the rolling mill machine has significantly decreased leading to a notable reduction in the cost of production.

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“…O processo de reaquecimento tem grande efeito no tamanho de grão da austenita e na uniformidade do tamanho de grão ao longo da seção do produto semi-acabado. Quanto maior a temperatura e o tempo de exposição, maiores serão as taxas de crescimento dos grãos [7][8][9].…”

Section: Processo De Laminação a Quenteunclassified

Estudo Da Resistência À Corrosão Entre Vergalhões Com Diferentes Microestruturas Frente Aos Íons Cloretos

Vieira¹,

Silva²,

Florez³

et al. 2017

Anais Do Congresso Anual Da ABM

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Resumo Os vergalhões são produzidos por meio do processo de laminação a quente. No processo em estudo há duas rotas distintas de produção. Previamente ao processo de laminação a quente, uma rota utiliza a etapa de reaquecimento via forno, e a outra utiliza o produto semi-acabado de aço vindo diretamente do processo de solidificação. Ao estabelecer um comparativo entre as rotas, as microestruturas obtidas apresentam algumas diferenças. O objetivo desse trabalho é avaliar como as diferenças entre as microestruturas influenciam na resistência à corrosão por cloretos. Para isso foram realizados ensaios de polarização potenciodinâmica anódica e espectroscopia de impedância eletroquímica em solução de NaCl, simulando os efeitos do íon Clpresente na atmosfera marinha. A partir das curvas obtidas nos ensaios eletroquímicos, foi possível observar que as propriedades de corrosão são semelhantes para ambos os processos. Palavras-chave: Corrosão por cloretos; Vergalhões; Laminação.

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Simulation of hot rolling deformation at intermediate passes and its industrial validity

Cited by 43 publications

References 6 publications

The Relationship Between Microstructural Evolution and Mechanical Properties of Heavy Plate of Low-Mn Steel During Ultra Fast Cooling

The Relationship Between Microstructural Evolution and Mechanical Properties of Heavy Plate of Low-Mn Steel During Ultra Fast Cooling

Scrap Reduction in TMT Reinforced Bar Production by the Application of Lean Techniques

Estudo Da Resistência À Corrosão Entre Vergalhões Com Diferentes Microestruturas Frente Aos Íons Cloretos

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