The temperature, roll force and roll torque during hot bar rolling

Said, Ahmed; Lenard, John; Ragab, Ahmed; El-Khier, Mostafa Abo

doi:10.1016/s0924-0136(98)00391-4

Cited by 43 publications

(14 citation statements)

References 10 publications

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“…Rolling temperature, roll pass, and rolling groove are major parameters of the shape rolling design process [22,23]. Determination of these parameters was based on the results of previous studies [19,24].…”

Section: Fabrication Of Fe-65 Wt % Si Bars By the Hot Bar Rolling Tmentioning

confidence: 99%

Fabrication Technology and Material Characterization of Hot Rolled Cylindrical Fe-6.5 wt. % Si Bars

Wen

Xue

Han

et al. 2018

Metals

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Cylindrical Fe-6.5 wt. % Si bars of 7.5 mm diameter were successfully fabricated from an as-cast ingot through three rolling stages, with 10 total passes: rough rolling at 850-900 • C and 8-10 m/min; medium rolling at 800-850 • C and 10-15 m/min; finish rolling at 800-850 • C and 12-18 m/min. The evolution of the microstructure, texture, and ordered structure were studied, and the mechanical properties were investigated. Results indicated that the grains were refined by the hot bar rolling. Area fractions of the {100}<011> and {011}<100> oriented grains decreased to 0 during hot bar rolling, whereas the {100}<001>, {011}<211>, and {112}<110> components increased. Furthermore, the γ fiber with {111}<110> component was dominant. After the hot bar rolling, the DO 3 ordered phase was suppressed, and the B2 ordered domains were refined. Ductility of the as-rolled bar was better than that of the rotary-swaged bar, due to the absence of the DO 3 ordered phase, and refinement of the grains in the rolled bar. Moreover, discontinuous dynamic recrystallization (DDRX) occurred at a high deformation rate during the rough rolling, and continuous dynamic recrystallization (CDRX) appeared at a low strain rate during the finish rolling. Hence, hot bar rolling technology is an excellent process for the fabrication of Fe-6.5 wt. % Si bars.

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Section: Fabrication Of Fe-65 Wt % Si Bars By the Hot Bar Rolling Tmentioning

confidence: 99%

Fabrication Technology and Material Characterization of Hot Rolled Cylindrical Fe-6.5 wt. % Si Bars

Wen

Xue

Han

et al. 2018

Metals

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“…Since the mid-1990sEkelund and Shin okura et al [8,9] developed empirical formulae based on the study of plastic deformation, by taking account factors such as contact area, roll force, friction, yield stress, effective roll radius and torque arm coefficient. Zienkiewicz and Kobayashi et al [10,11] established the fundamentals of the rigid-viscoplastic FEM and mathematical formulation.…”

Section: Literature Review and Problem Descriptionmentioning

confidence: 99%

Development of parameterized roll pass design based on a hybrid model

Huang

Xing

Spuzic

et al. 2010

2010 International Conference on Mechanical and Electrical Technology

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Hot steel rolling is an important manufacturing process used to efficiently provide a wide range of products of high quantity and quality. In order to meet the continuously increasing demands, both an improved quality and a broader variety of products must be delivered along with improvements in efficiency, reliability and sustainability of rolling mill systems. Further development of roll pass design presents one of the central aspects in these efforts. However, to optimize roll pass design, numerous combinations of system parameters must be analyzed and correlated. This cannot be done through a single deterministic model. Therefore, a parameterized hybrid model based on combining cross-disciplinary knowledge is proposed to improve the quality and efficiency of roll pass design. Application of artificial intelligent algorithms is envisaged for the roll pass design optimization and a methodology for constructing the relevant hybrid model is described.

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“…It is commonly accepted that the acceleration of industrialization has been boosting the global demand on more economical and sustainable rolling operations, which consequently drives the innovation and improvement of RPD [4,7,8]. However, due to the non-linear and highly uncertain deformation behaviors of rolled materials, complex rolling contexts, as well as the complicated interactions between thermal and mechanical phenomena, rolling practices are usually difficult to be numerically modelled, analyzed and predicted [9][10][11]. Thus, the exploration of efficient, accurate and flexible solutions for RPD becomes extremely attractive in the rolling system development and shape rolling operations.…”

Section: Introductionmentioning

confidence: 99%

Towards Energy Efficient Shape Rolling: Roll Pass Optimal Design and Case Studies

Huang

et al. 2019

Chin. J. Mech. Eng.

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Shape rolling is widely employed in the production of long workpieces with appropriate cross-section profiles for other industrial applications. In the development of shape rolling systems, roll pass design (RPD) plays an essential role on the quality control of products, service life of rolls, productivity of rolling systems, as well as energy consumption of rolling operations. This study attempts to establish a generic strategy based on hybrid modeling and an improved genetic algorithm, to support the optimizations of RPD and shape rolling operations at a systematic perspective. Objectives include improving the quality and efficiency of RPD, reducing energy consumption of shape rolling, as well as releasing the demands on costly trails and expert knowledge in RPD. Hybrid modeling based on cross-disciplinary knowledge is developed to overcome the limitations of isolated single-disciplinary models. And conventional genetic algorithm is improved for the implementation of optimal design. Targeting to integrate empirical data and published reliable solutions into optimizations, a parameters estimation method is proposed to transfer the initially misaligned models into a uniform pattern. A tool based on the Matlab platform is developed to demonstrate the optimal design operations, with case studies involved to validate the proposed methodology.

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The temperature, roll force and roll torque during hot bar rolling

Cited by 43 publications

References 10 publications

Fabrication Technology and Material Characterization of Hot Rolled Cylindrical Fe-6.5 wt. % Si Bars

Fabrication Technology and Material Characterization of Hot Rolled Cylindrical Fe-6.5 wt. % Si Bars

Development of parameterized roll pass design based on a hybrid model

Towards Energy Efficient Shape Rolling: Roll Pass Optimal Design and Case Studies

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