Programações - ABM Brasil

CARBIDE REINFORCEMENT FOR FINISHING MILL ROLLS AND THE EFFECT ON TEST RESULTS AND STRIP SURFACE.

Per: Michael Brandner (ESW), Sander Mul (LISMAR)

Area: Ferrous and Non Ferrous

Theme: Hot Strip Mills

Event: IRC 2019

Type: Oral

Date and time: 03/10/19 | 14h00

Room: 12

Abstract:

Graphitic HSS roll grades such as ESW’s brand VANIMO can be considered as the latest developments for the last finishing stands in hot strip mills. These roll grades are developed on the basis of the alloying concept of (Carbide Enhanced) Indefinite Chill work roll materials. During the development of VANIMO, the amounts and types of carbide forming elements were increased and adjusted into the direction of cast HSS roll grades. The microstructure of graphitic HSS roll grades therefore consists of tempered martensite, cementite and several different carbide types as well as a well-defined amount of free graphite.
The main purpose of graphitic HSS roll grades is to combine the high surface quality of Indefinite Chill alloys as well as the high wear resistance of HSS roll grades. Several systematic steps were taken to increase the wear performance from Carbide-Enhanced Indefinite Chill grades to the more advanced VANIC grade and further on to the highest alloyed roll grade VANIMO. In every development step, the surface quality of the roll grades was carefully monitored.
The decision to invest in new testing equipment at ESW’s plant was driven by the wish to see microstructural effects of different alloys in a macroscopically dimension. Usually samples are taken from cast rolls and investigation is done in comparable small size areas compared to the total surface of a roll. Rolling of strip is done with the total barrel, so effects of alloy and microstructure can appear anywhere in the barrel surface. To ensure better understanding and deeper knowledge about influences of alloying trials we decided to install the last version of LRI (Lismar Roll Inspection). LRI includes the latest technology of Eddy Current with an enormous resolution. Depending on the formation of carbide precipitations, carbide network as well as matrix and free graphite, the EC test can detect smallest differences. The possibility to analyze the different results of EC and UT surface wave inspection will be discussed. A few examples of surface effects in the mill application will be discussed and improvement strategies explained.

PRODUCTIVITY INCREASE AT ARCELORMITTAL TUBARAO HOT STRIP MILL

Per: jose fagundes junior (arcelormittal tubarao)

Area: Ferrous and Non Ferrous

Theme: Hot Strip Mills

Event: IRC 2019

Type: Oral

Date and time: 03/10/19 | 14h00

Room: 14

Abstract:

BACKUP ROLL BEARING TEMPERATURE MONITORING ON A TANDEM COLD MILL

Per: rogerio martins pereira (Arcelormittal vega)

Area: Ferrous and Non Ferrous

Theme: Strip Cold Rolling, Annealing and Coating Processes

Event: IRC 2019

Type: Oral

Date and time: 03/10/19 | 14h00

Room: 15

Abstract:

REDUCTION OF STRIP BREAKS IN TERNIUM PLTCM PLANT

Per: C. A. Gómez-De-La-Garza (1*), D. F. Rodríguez-Pérez (1) J. Salinas-Reyes (2), Luis R. Salazar-Garza (1); A. Rangel-Fuentes (1), J. Ramirez-Cuéllar (1). (TERNIUM Mexico)

Area: Ferrous and Non Ferrous

Theme: Strip Cold Rolling, Annealing and Coating Processes

Event: IRC 2019

Type: Oral

Date and time: 03/10/19 | 14h00

Room: 16

Abstract:

SLAB RESIDENCE TIME CONTROLLED BY VARIABLE SPACE BETWEEN THE SLABS FOR DIFFERENT FINAL STRIP THICKNESS IN A WALKING BEAM TYPE REHEATING FURNACE IN A STECKEL HOT STRIP MILL PRODUCTION LINE

Per: JOAO JUNIO pereira lino (GERDAU), altair lucio de souza (gerdau), rogerio antão cardoso (gerdau), fabio de oliveira soares (gerdau), luciano morais teixeira (gerdau), jacson morais borges (gerdau), willy schuwarten junior (gerdau), jorge adam cleto cohn (gerdau), cleiton arlindo martins (gerdau)

Area: Ferrous and Non Ferrous

Theme: Steckel Mills

Event: IRC 2019

Type: Oral

Date and time: 03/10/19 | 14h00

Room: 17

Abstract: