Managing quality in continuous casting process using product quality model and simulated annealing

Kulkarni, Makarand S.; Babu, A. Subash

doi:10.1016/j.jmatprotec.2004.09.073

Cited by 39 publications

(39 citation statements)

References 19 publications

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“…Consequently, these equations could not be a) b) used for a different CCM or different casting conditions. Some authors [24][25][26][27] tried to improve this initial approach defining independently different equations for each segment. Although it was hoped that they would deliver a better approach, these refinements have not provided a considerable improvement as expected.…”

Section: Heat Removal In the Secondary Cooling Systemmentioning

confidence: 99%

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Heat removal analysis on steel billets and slabs produced by continuous casting using numerical simulation

Ramı́rez-López

Muñoz

Palomar-Pardavé

et al. 2017

Int J Adv Manuf Technol

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Simulation of a continuous casting process (CCP) is very important for improving industrial practices, reducing working times, and assuring safety operating conditions. The present work is focused on the development of a computational simulator to calculate and analyze heat removal during continuous casting of steel; routines for reading the geometrical configuration and operating conditions were developed for an easy management. Here, a finite difference method is used to solve the steel thermal behavior using a 2D computational array. Conduction, radiation, and forced convection equations are solved to simulate heat removal according to a steel position along the continuous casting machine. A graphical user interface (GUI) was also developed to display virtual sketches of the casting machines; moreover, computational facilities were programmed to show results such as temperature and solidification profiles. The results are analyzed and validated by comparison with industrial trials; finally, the influence of some industrial parameters such as casting speed and quenching conditions is analyzed to provide some recommendations in order to warrant safety operating conditions.

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Section: Heat Removal In the Secondary Cooling Systemmentioning

confidence: 99%

“…The value of each range is previously calculated using Eq. (27). Then a numerical code is assigned to each range to identify and display the corresponding color on the screen.…”

Section: Graphical Tools and Algorithmsmentioning

confidence: 99%

Heat removal analysis on steel billets and slabs produced by continuous casting using numerical simulation

Ramı́rez-López

Muñoz

Palomar-Pardavé

et al. 2017

Int J Adv Manuf Technol

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“…On the basis of the recently elaborated empirical equations [13,14] as well as the computation method for calculation of chemical composition of mould powders presented in the paper [15], the authors proposed optimal values of physicochemical parameters of the powder which would be most suitable at the casting process of Ø 170 mm billets made of C45 steel.…”

Section: Physical and Chemical Properties Of Powder For Casting Procementioning

confidence: 99%

Optimization of Chemical Composition of the Mould Powder for Casting Ø 170 mm Billets from C45 Steel

Kania

Nowacki

2016

Archives of Metallurgy and Materials

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Physico-chemical properties of mould powders and assumed casting parameters for the particular steel grade influence the way of lubricating the surface of the skin of concast billets formed in the mould, as well as heat transfer along its circumference.The paper presents research which main aim was to improve the surface quality of continuous casting round billets (Ø 170 mm) cast from C45 steel. Improvement of the surface quality can be obtained by designing the chemical composition of mould powder for local casting conditions and the technical and technological parameters of CC equipment. Based on the experimental casting from C45 medium carbon steel it was found that there are relationships between the physicochemical properties of mould powder and intensity of skin lubrication and heat transmission to the mould wall.

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“…[5][6][7][8][9][10] The authors 5,6 propose an interaction between the numerical heat-transfer model and the artificial-intelligence heuristic-search method, linked to a knowledge base for the continuous casting. A two-dimensional heat-transfer model was developed using the finitedifference method and applied to real continuous-casting conditions.…”

Section: Introductionmentioning

confidence: 99%

“…8 A total of 17 critical-quality conditions were identified; these had to be satisfied to prevent defect formations during the casting. An objective function, formulated as a loss function, was used so that all 17 critical conditions were satisfied simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Modeling of occurrence of surface defects of C45 steel with genetic programming

Kovačić¹,

Jager²

2015

Mater. Tehnol.

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Carbon steel C45 with an increased content of carbon is used for tempering in the automotive industry for highly stressed parts (axles, shafts), machine parts, screws, drills for wood, axes, knives, hammers and similar. In the present work an attempt of analyzing the influences of different steelmaking parameters is presented. On the basis of the monitored data about the casting-temperature changes, the total oxygen, the number of added aluminum rods, the chemical analyses before and after steelmaking, the added lime, the aluminum-cored wire, the calcium-silicon-cored wire, the sulphur-cored wire, the rolling dimensions, the casting speed, the opening of the ladle nozzle with oxygen and surface defects (scrap fraction) on rolled bars, a mathematical model was obtained with the help of the genetic programming method. The results show that the most influential parameters for the surface-defect occurrence on the C45 steel are the opening of the ladle nozzle with oxygen and aluminum. On the basis of the results, the steelmaking technology was changed. Instead of the aluminium-killed steelmaking technology the aluminium-calcium-free (ACF) steelmaking technology was used. The batches from an aluminium-calcium-free steelmaking period statistically have a significantly lower level of surface defects (scrap fraction). The scrap fraction was reduced from the average of 68.45 % to 1.92 % -by more than 35 times. Keywords: mechanical engineering, metallurgy, steel, C45 steel, making steel, casting steel, steel plant, billet surface defects, genetic programming Jeklo C45 je ogljikovo jeklo za pobolj{anje s pove~ano koncentracijo ogljika. Uporablja se za obremenjene dele v avtomobilski industriji (osi, gredi), za dele strojev, vijake, svedre za les, sekire, no`e, kladiva in podobno. V~lanku je predstavljen poskus analize vplivov razli~nih parametrov pri postopku izdelave omenjenega jekla. Na podlagi zbranih podatkov o spremembi livne temperature, aktivnega kisika (kisik v talini), dodanih aluminijevih palic, analiz kemijskih elementov med izdelavo jekla in po njej, dodanega apna, dodanega aluminija, kalcij-silicija ter`vepla v obliki`ice, dimenzij valjanca, hitrosti litja, pod`iganja in podatkov o povr{inskih napakah (dele`izmeta) valjanih palic smo izdelali matemati~ni model z genetskim programiranjem. Rezultati modeliranja genetskega programiranja so pokazali, da sta pod`iganje in aluminij tista parametra, ki najbolj vplivata na nastajanje napak v jeklu C45 in imata torej najve~ji vpliv na izmet. Na podlagi rezultatov se je spremenila tehnologija izdelave jekla. Namesto tehnologije z dodatkom aluminija se je uporabila tehnologija aluminium-calcium-free (ACF). [ar`e, izdelane v obdobju izdelave jekla s to tehnologijo, imajo statisti~no zna~ilno manj povr{inskih napak (izmeta). Izmet se je v povpre~ju zmanj{al iz 68,45 % na 1,92 % -ve~kot 35-krat.

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Managing quality in continuous casting process using product quality model and simulated annealing

Cited by 39 publications

References 19 publications

Heat removal analysis on steel billets and slabs produced by continuous casting using numerical simulation

Heat removal analysis on steel billets and slabs produced by continuous casting using numerical simulation

Optimization of Chemical Composition of the Mould Powder for Casting Ø 170 mm Billets from C45 Steel

Modeling of occurrence of surface defects of C45 steel with genetic programming

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