Title

CARBIDE ENHANCEMENT AND EXACT GRAPHITE CONTROL IN ICDP ROLLS WITH CALCULATED PROCESS PARAMETERS

CARBIDE ENHANCEMENT AND EXACT GRAPHITE CONTROL IN ICDP ROLLS WITH CALCULATED PROCESS PARAMETERS

Authorship

Brandner, Michael; Mayr, Alex; Nylen, Tommy

Brandner, Michael

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Mayr, Alex

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Nylen, Tommy

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DOI

10.5151/2594-5297-17498

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Abstract

Throughout recent years, roll manufacturers have developed different kinds of high performing rolls. For roughing mills and first finishing stands HSS rolls and for the last finishing stands carbide enhanced ICDP rolls. Different types of alloying elements have been chosen and the ratio of carbide forming elements to the carbon content gives a big variety of opportunities. At ESW the world-wide patented VIS grade was developed and there are still enough possibilities for new concepts. ESW has introduced a new system to describe the status of the liquid metal. For all grades with free graphite precipitation it is essential to characterize the nucleation status of the melt. The inoculation is key process to influence the amount and the shape of the free graphite, which will be present in the roll after casting and solidification. Due to the ability to define the graphite content in carbide enhanced ICDP rolls under the normal production process, it is thus possible to produce customer tailored rolls to meet specific rolling mill requirements. In comparison to conventional rolls the variety of graphite content and microstructure is much smaller and can be varied according to the specific mill conditions.

Throughout recent years, roll manufacturers have developed different kinds of high performing rolls. For roughing mills and first finishing stands HSS rolls and for the last finishing stands carbide enhanced ICDP rolls. Different types of alloying elements have been chosen and the ratio of carbide forming elements to the carbon content gives a big variety of opportunities. At ESW the world-wide patented VIS grade was developed and there are still enough possibilities for new concepts. ESW has introduced a new system to describe the status of the liquid metal. For all grades with free graphite precipitation it is essential to characterize the nucleation status of the melt. The inoculation is key process to influence the amount and the shape of the free graphite, which will be present in the roll after casting and solidification. Due to the ability to define the graphite content in carbide enhanced ICDP rolls under the normal production process, it is thus possible to produce customer tailored rolls to meet specific rolling mill requirements. In comparison to conventional rolls the variety of graphite content and microstructure is much smaller and can be varied according to the specific mill conditions.

Keywords

Graphite control; Enhanced ICDP; Nucleation of melt; Special carbides.

Graphite control; Enhanced ICDP; Nucleation of melt; Special carbides.