Characteristics of Plasticine Used in the Simulation of Slab in Rolling and Continuous Casting

Abstract

SynopsisSimulation by plasticine is carried out to estimate the stress distribution and deformation o f steel in hot rolling and to prevent the generation of internal or surface crack of slab in continuous casting.In this report, first of all, the following dynamic properties of plasticine is treated to establish the foundation of simulation: i) Static properties (the stress-strain relation, its dependence on temperature and a criterion of yielding, etc.) ii) Kinetic properties (the dependence of stress on the strain-rate etc.) iii) Friction with metal surface. From the above investigation, it became clear that, there exists the following relation between the stress c(kgf/cm2), logarithmic strain e, strainrate (1/s) and temperature T (°K), in the region of T = 253° 323°K, e = 0.02-' 0.3 and E =10-2 10° 1/s; a = 1.15 X 10-5~0.085~012 exp 3 530 T Then the above result is compared with the deformation resistance of steel at high temperatures (about 1000°C). And it is confirmed that plasticine has well satisfied properties to simulate not only the deformation of steel at high temperatures but also the stress distribution.

ECAP process improvement based on the design of rational inclined punch shapes for the acute-angled Segal 2θ-dies: CFD 2-D description of dead zone reduction

“…Physical simulation techniques using plasticine workpiece models are often used in material forming practice (Chijiwa et al, 1981;Han et al, 2008;Laptev et al, 2014;Perig et al, 2010Perig et al, , 2013aPerig et al, , b, 2015Perig and Laptev, 2014;Perig and Golodenko, 2014a, b;Perig, 2014;Sofuoglu and Rasty, 2000;Wu and Baker, 1997). In order to estimate the character of viscous flow during ECAP through a 2θ acute-angled angular die of Segal geometry ABC-abc under the action of a classical rectangular punch and a novel modified 2θ 0 -inclined or 2θ 0 -beveled punch shapes we have utilized physical simulation techniques in Figs The main experimental visualization technique in Figs.…”

Kinematic features of viscous flow of amorphous materials during an equal channel multiple-angle extrusion through a 2-turn rectangular die

“…Численный расчет проводился для следующих параметров: ширина каждого канала a = 40 мм (рис. 1а), скорость прессования 0 U =270•10 -6 м/с, давление прессования p =518 кПа, плотность модели ρ =1850 кг/м 3 , предел текучести пластилина S σ =217 кПа [12], удельные теплоемкость и теплопроводность пластилина c =1,004 кДж/(кг·К) и λ =0,7 Дж/(м·с·К) [13]; динамическая вязкость vis η =135 Па·с, число Рейнольдса…”

“…В тоже время практическая реализация технологии РКМУП труднообрабатываемых металлов и сплавов, композитов, порошковых, аморфно-кристаллических и аморфных полуфабрикатов требует подробного динамического анализа особенностей течения заготовок с учетом эффектов вязкости и макроскопической ротации деформируемого материала. Также отметим отсутствие в ранее опубликованных работах [1][2][3][4][5][6][7][8][9][10][11][12][13] теоретического анализа задач РКМУП деформируемых материалов с учетом эффектов вязкости, что и обусловливает актуальность исследуемой проблемы.…”

Mechanism of Edge Seam Defects of Stainless Steel Generated during Hot Plate Rolling

“…The test mill has 500 mm width, 100 mm diameter rolls, maximum 50 mm roll gap opening and an adjustable pass line. The flow behavior of plasticine was adopted by the following model, 12) ....... (13) Since the plasticine shows a good flow behavior as hot steel at a low strain rate, the plate was rolled with a slow speed at pilot mill. The process condition used in the simulation was summarized as case 1 in Table 3.…”