Programações - ABM Brasil

MECHANICAL PROPERTIES PREDICTION OF ADVANCED HIGH STRENGTH STEEL USING MACHINE LEARNING TECHNICAL

Per: julio cezar de sousa zorzi (USIMINAS - IPATINGA), Tairine Berbert Tavares (Usiminas), Tadeu Messias Donizete Borba (usiminas), Fagner de Carvalho Oliveira (usiminas), Frederico Chaves Carvalho (ufmg)

Area: Forming Processes and Metal Products

Theme: Thin slab rolling

Event: 58th Seminar on Rolling, Metal Forming and Products

Type: Oral

Date and time: 02/08/23 | 11h30

Room: 13

Abstract:

SIZING MILL ROLLING LINE – PIPES FOR MANUFACTURING CYLINDERS

Per: Silvester Ferreira da Silva (Vallourec Soluções Tubulares)

Area: Forming Processes and Metal Products

Theme: Rolling mills for long products

Event: 58th Seminar on Rolling, Metal Forming and Products

Type: Oral

Date and time: 02/08/23 | 11h30

Room: 14

Abstract:

THERMOFLUXMETER – REFRACTRY MONITORING ONLINE SYSTEM FOR TROUGH AT CSN

Per: guilherme muniz mariano (CSN)

Area: Polymer, Composite and Ceramic Materials

Theme: Ceramic materials

Event: 76th ABM Annual Congress - International

Type: Oral

Date and time: 02/08/23 | 11h30

Room: 15

Abstract:

DEVELOPMENT OF AN INNOVATIVE CONVECTION COOLING SYSTEM FOR WORK ROLLS IN HOT STRIP MILLS

Per: Helton de Freitas COTA (SMS GROUP)

Area: Forming Processes and Metal Products

Theme: Conventional hot strip mills

Event: 58th Seminar on Rolling, Metal Forming and Products

Type: Oral

Date and time: 02/08/23 | 11h30

Room: 16

Abstract:

Work roll cooling systems in hot strip mills (HSM) are among the most important components in a millstand, as they prevent the rolls from overheating. For this purpose, most hot rolling mills feature spray systems that use nozzles to apply large quantities of water to the surface of the work rolls at a pressure of up to 20 bar. Plant owners are now also placing greater focus on energy consumption levels in the production of hot strip. Consequently, the task was to develop a new type of work roll cooling system that offers the following improvements compared to conventional spray cooling: Reduction in the supply pressure with a lower volume of water required and high cooling performance with more uniform cooling over the surface of the rolls.The first step was to compare simple two-dimensional basic roll cooling layouts by means of CFD simulations. The heat input in the roll gap and the heat distribution inside the roll were also simulated. What transpired here was that a film of water flowing against the direction of rotation of the rolls generates the best cooling effect. After further CFD tests, a cooling system, was developed in collaboration with the Design department. The X-Roll®CRC (Convection Roll Cooling) system consists mainly of a shell, which is curved similar to the roll diameter, and a water nozzle (spanning the width). This nozzle sprays water against the direction of rotation of the rolls into the gap, which forms between the work roll and the shell. As a result, the shell is mechanically free-floating (i.e. there is no contact with the work roll) on the film of cooling water. The height (i.e. thickness) of the cooling water film between the X-Roll®CRC shell and the work roll results automatically from the balance of forces between the weight or contact force and the water pressure force in the cooling gap. The high cooling capacities calculated in the theoretical preliminary studies, and the huge energy savings potential associated with this, were compared in simulations with other cooling systems available on the market. The predicted characteristics were confirmed in practical tests on a specially built test stand and in tests carried out over several months in various stands of a hot rolling mill.