Título

INNOVATION SPECTRUM OF IRLE ROLLS

INNOVATION SPECTRUM OF IRLE ROLLS

Autoria

Kaiser, Rainer; Oberding, Igor; Mehlau, Siegbert; Hellenthal., Ludwig

DOI

10.5151/2594-5297-22511

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Resumo

The IRLE Group is a traditional German family owned foundry and machine shop existing now since 1693, being a worldwide known leading producer of casted rolls for steel mills, and non ferrous metal mills in general, since 1820. This paper is focusing developments of recent years achieved at IRLE, at compound work rolls for flat steel rolling mills. These rolls are used as work rolls in hot strip, Steckel, medium and heavy plate, skin pass as well as sheet mills. The paper is giving an overview not only of the improvements made in the material qualities as well as chemical and mechanical characteristics itself, but is showing also an overview of the research, investigations, investments and efforts made by IRLE in the respective production processes. The product developments were made together with key end-users aiming rolls with longer live time, higher wear resistance, higher resistance to torque, bending forces and corrosive environments, with optimized tribological characteristics (e. g., surface qualities of the materials) and thermal resistance to fire cracks. The innovations at IRLE will always follow cost relevance for customer´s benefit. The constant drive for an overall economic efficiency improvement of the rolling mill process is persecuted in the research efforts and targets. Thus, costs are saved for the end user with regard to prior processes in the production of flat steel, with stable high qualities of the resulting steel sheet coils. After a short description of the main materials, methods and procedures used to achieve these goals in an industrial production of bi-metallic rolls at IRLE, such as centrifugal casting technologies, the achieved results are discussed, giving an overview of the resulting compound rolls and material qualities available for the worldwide market nowadays. Compound materials that IRLE offers include steel, steelbase, steelbase graphitized materials, chrome iron or steel, indefinite chill, as well as semi and high speed steels. According to end users´ needs, a barrel hardness range of 65 to 85°ShC (470 to 690 HV) is available. Trends, such as the use of high speed steel rolls at plate mills and improvement of the metal cores on rolls which have to resist to heavier loads and torques shall be further discussed in future papers.

 

The IRLE Group is a traditional German family owned foundry and machine shop existing now since 1693, being a worldwide known leading producer of casted rolls for steel mills, and non ferrous metal mills in general, since 1820. This paper is focusing developments of recent years achieved at IRLE, at compound work rolls for flat steel rolling mills. These rolls are used as work rolls in hot strip, Steckel, medium and heavy plate, skin pass as well as sheet mills. The paper is giving an overview not only of the improvements made in the material qualities as well as chemical and mechanical characteristics itself, but is showing also an overview of the research, investigations, investments and efforts made by IRLE in the respective production processes. The product developments were made together with key end-users aiming rolls with longer live time, higher wear resistance, higher resistance to torque, bending forces and corrosive environments, with optimized tribological characteristics (e. g., surface qualities of the materials) and thermal resistance to fire cracks. The innovations at IRLE will always follow cost relevance for customer´s benefit. The constant drive for an overall economic efficiency improvement of the rolling mill process is persecuted in the research efforts and targets. Thus, costs are saved for the end user with regard to prior processes in the production of flat steel, with stable high qualities of the resulting steel sheet coils. After a short description of the main materials, methods and procedures used to achieve these goals in an industrial production of bi-metallic rolls at IRLE, such as centrifugal casting technologies, the achieved results are discussed, giving an overview of the resulting compound rolls and material qualities available for the worldwide market nowadays. Compound materials that IRLE offers include steel, steelbase, steelbase graphitized materials, chrome iron or steel, indefinite chill, as well as semi and high speed steels. According to end users´ needs, a barrel hardness range of 65 to 85°ShC (470 to 690 HV) is available. Trends, such as the use of high speed steel rolls at plate mills and improvement of the metal cores on rolls which have to resist to heavier loads and torques shall be further discussed in future papers.

Palavras-chave

Work rolls; Hot strip steel and plate mills; Material and production process improvements.

Work rolls; Hot strip steel and plate mills; Material and production process improvements.