Programações - ABM Brasil

EVALUATION OF SURFACE CLEANLINESS OF STEEL STRIP AFTER THE CGL'S CLEANING SECTION BY THE REFLECTANCE TEST AND CHEMICAL ANALYZIS OF RESIDUAL ELEMENTS

Per: JULIANA PORTO GUIMARAES (USINAS SIDERURGICAS DE MINAS GERAIS SA)

Area: Forming

Theme: Strip cold rolling and coating processes

Event: 57th Rolling

Type: Oral

Date and time: 09/06/22 | 08h35

Room: 12

Abstract:

DEVELOPMENT OF A 600MPA STRENGTH STEEL BY THERMOMECHANICAL PROCESSING OF A HIGH TITANIUM ALLOY IN A STECKEL PLATE

Per: Cleiton Arlindo Martins (GERDAU ouro branco), Altair Lúcio de Souza (gerdau ouro branco), Jorge Adam Cleto Cohn (gerdau ouro branco), Geraldo Lúcio de Faria (universidade federal de ouro preto - ufop), Marcello Arantes Rebellato (Companhia Brasileira de Mineração e Metalurgia - cbmm), Antônio Augusto Gorni (COMPANHIA BRASILEIRA DE MINERAÇÃO E METALURGIA - CBMM), Pello Uranga (CEIT and Universidad de Navarra), Jose Maria Rodríguez-Ibabe (CEIT AND UNIVERSIDAD DE NAVARRA)

Area: Forming

Theme: Steckel mills

Event: 57th Rolling

Type: Oral

Date and time: 09/06/22 | 08h35

Room: 13

Abstract:

The increasing need to obtain high levels of mechanical properties (yield strength – YS, and tensile strength – TS) has imposed several challenges on steel production processes. Load lifting machines are examples of applications that require YS > 600 MPa and TS > 680 MPa. In this scenario, HSLA steels has gained more relevance, given the possibility of increasing mechanical properties with carbon content decrease, favoring welding processes. Recent studies have shown the obtainment of YS above 600 MPa in alloys with 0.06% Nb and 0.1% titanium, in a ratio with nitrogen above the stoichiometric (Ti/N > 3.42). The addition of microalloying elements, associated with thermomechanical processing triggers the activation of hardening mechanisms such as grain refining and precipitation, however, it is necessary to adopt rolling strategies with strict control of process parameters. In this context, this work proposes the development of a hot-rolled steel strip aiming to reach YS > 600 MPa and TS > 680 MPa using a low carbon, Nb and Ti microalloyed alloy, with a Ti addition higher than the stoichiometric ratio and thermomecanically processed in a Steckel mill. Rolling parameters were determined considering microstructural evolution simulations performed in a software adjusted for the Steckel mill – the MicroSim-SM®. The non-recrystallization temperature was experimentally obtained by hot torsion test. Through dilatometry coupled to the strain cell, the alloy CCT diagram was obtained. Applying the above mentioned results, two different rolling strategies were proposed and evaluated in industrial scale. The rolled strips microstructure and mechanical properties were evaluated. It was possible to conclude that the applied methodology was efficient aiming to design a processing rout in order to reach a high level of grain refinement and a significant precipitation hardening that guaranteed the desired mechanical properties.

PIPE AND BAR QUENCH BENCHMARK

Per: Helton de Freitas COTA (sms group)

Area: Forming

Theme: Technological innovation

Event: 57th Rolling

Type: Oral

Date and time: 09/06/22 | 08h35

Room: 14

Abstract:

OFF LINE SIMULATION SOFTWARE DEVELOPMENT FOR RACE ANALYSIS IN LD CONVERTERS – THERMO BALANCE LD

Per: renata dias e silva souza (soft sider s/a)

Area: Melting, Refining and Solidification

Theme: Oxygen steelmaking

Event: 51st Steelmaking

Type: Oral

Date and time: 09/06/22 | 08h35

Room: 15

Abstract:

OPTIMIZATION OF PITCH CIRCLE DIAMETER OF LADLE FURNACE

Per: Edgard marcos ribeiro (Arcelormittal monlevade), Marcos Vinícius Ribeiro da Cunha (ArcelorMittal Monlevade), Geraldo Magela Gomes (arcelormittal monlevade), Ângelo Máximo Fernandes Marins (ARCELORMITTAL MONLEVADE), Gleisson Morais (ARCELORMITTAL MONLEVADE), Gustavo Henrique Sousa (ARCELORMITTAL MONLEVADE), carla regina ferreira (ARCELORMITTAL MONLEVADE), Cesar Takaci Sato (ARCELORMITTAL MONLEVADE), Joaquim Gonçalves Costa Neto (ARCELORMITTAL MONLEVADE), Alin Junior Machado Chaves (ARCELORMITTAL MONLEVADE)

Area: Melting, Refining and Solidification

Theme: Secondary refining of steel

Event: 51st Steelmaking

Type: Oral

Date and time: 09/06/22 | 08h35

Room: 16

Abstract: