Programações - ABM Brasil

OPTIMIZATION OF THE CUTTING CLEARANCES FOR PLATE EDGES QUALITY IMPROVEMENT IN THE SHEAR LINE OF THE GERDAU OURO BRANCO PLATE MILL

Por: Ronaldo Esteves Ribeiro (GERDAU), José Herbert Dolabela da Silveira (GERDAU), Warley da Silva Horta (GERDAU), Jefferson Felipe Faria Clemente (GERDAU), Douglas Clemente Silveira (GERDAU), Carlos Victor Francisco Ferreira dos Santos (GERDAU), Guilherme Valentin da Silva Santiago (GERDAU)

Área: Ferrous and Non Ferrous

Tema: Plate Mills

Evento: IRC 2019

Tipo: Oral

Data e horário: 02/10/19 | 14h00

Sala: 12

Resumo:

MATHEMATICAL MODELLING OF THERMAL EVOLUTION AS A TOOL FOR ENHANCING STEEL ROUGH ROLLING

Por: Antonio adel dos santos (usiminas)

Área: Ferrous and Non Ferrous

Tema: Mathematical Modeling and Simulation

Evento: IRC 2019

Tipo: Oral

Data e horário: 02/10/19 | 14h00

Sala: 13

Resumo:

Por: junjun cui (State Key Laboratory of Rolling and Automation, Northeastern University), wenting zhu (State Key Laboratory of Rolling and Automation, Northeastern University), LIQING CHEN (State Key Laboratory of Rolling and Automation, Northeastern University)

Área: Ferrous and Non Ferrous

Tema: Thermomechanical Processes, TMCP

Evento: IRC 2019

Tipo: Oral

Data e horário: 02/10/19 | 14h00

Sala: 14

Resumo:

COST REDUCTION AND BETTER QUALITY CONTROL BY ON-LINE ROUGHNESS MEASUREMENT DURING CONTINUOUS STRIP PROCESSING - SORM3PLUS

Por: anderson rosa pereira (emh)

Área: Ferrosos e Não Ferrosos

Tema: Laminação de Tiras a Frio, Recozimento e Processos de Revestimento

Evento: 56º Laminação

Tipo: Oral

Data e horário: 02/10/19 | 14h00

Sala: 15

Resumo:

RHEOROLLING OF ALUMINIUM ALLOY A413 TO PRODUCE CONTINUOUS METALLIC STRIPS.

Por: PEDRO BARBOSA DE OLIVEIRA NETO (CAMPUS DE ILHA SOLTEIRA), Lucas veronez goulart ferreira (unesp ilha solteira), antonio de pádua lima filho (unesp ilha solteira), MIGUEL BORODIAK (COMPANHIA BRASILEIRA DE ALUMINIO)

Área: Ferrous and Non Ferrous

Tema: New Rolling Processes

Evento: IRC 2019

Tipo: Oral

Data e horário: 02/10/19 | 14h00

Sala: 16

Resumo:

Rheorolling is a novel technology to manufacture metallic strip. This process saves energy because the material is formed in semisolid state demanding less power from the rolling mills, i.e., no robust equipment is required and many stages of traditional rolling can be suppressed. The typical coarse cast structure of ingoting and continuous casting products is refined by hot rolling. On the other hand, the rheorolling process refines microstructure by high heat transfer during processing of the strip. Furthermore, while the semisolid state forms, shear stress acts degenerating the dendritic morphology. Thus, globular structure occurs increasing the mechanical properties. Rheorolling requires minor separation force between rolls in comparison with traditional forming processes. Al-Si A413 alloy is usually processed via die casting. This alloy is not suitable to obtain metallic strips by forming because of the brittle Si particles, and thus the rheorolling process can make this viable. In this study, Al-Si A413 alloy was melted and poured at 680 ºC on a cooling slope to obtain the semisolid material feeding the ceramic nozzle (150 cm³) at the lower roll. Both rolls of the roll stand are separated with a gap of 1.5 mm, have approximately 105 mm in diameter and are made of carbon steel. The chill/columnar layer formed at the lower roll drags the metallic slurry at a rate of 0.2 m/s to be formed by the upper roll, obtaining a metallic cast strip with a thickness of approximately 2 mm. Three conditions were applied to test the continuity of the process: 1) Roll stand without any mechanism to reduce the pressure on the metallic slurry; 2) Roll stand with springs attached on the upper roll in order to reduce the separation force between the rolls; and 3) Upper roll modified with springs and the lower roll internally cooled by soluble oil in order to increase the heat transfer. The first condition did not work properly due to the sticking of the strip onto the lower roll. The second was successfully performed obtaining a continuous metallic strip. The last condition failed due to complete solidification of the melt alloy between rolls and at the ceramic nozzle. This indicates a lack of fluidity of the metallic slurry promoting premature solidification while processing.