Roller comprising a wear protection layer which is applied at least in some areas

A tungsten carbide coating on HSS or semi-HSS rollers addresses wear and cracking issues, enhancing service life and productivity by distributing impact loads and improving lubrication, thus overcoming conventional limitations.

EP4759455A1Pending Publication Date: 2026-06-17THYSSENKRUPP STEEL EUROPE AG PATENTE PATENT DEPARTMENT
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Patent Information

Application Number
EP2024219292
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-12-12
Publication Date
2026-06-17

AI Technical Summary

Technical Problem

Conventional rollers, particularly those made of high-speed steel (HSS) or semi-HSS, suffer from high wear and cracking due to mechanical and thermal stresses during rolling processes, especially in cold rolling, leading to reduced service life and potential core failure.

Method used

Applying a wear-resistant layer composed of tungsten carbide (WC) or WC-Co alloy through thermal spraying, partially or fully covering the roller's surface, enhances both wear and crack resistance, particularly when combined with HSS or semi-HSS steel.

Benefits of technology

The combination of WC or WC-Co coating with HSS or semi-HSS steel significantly extends the roller's service life, reduces cracking, and maintains process productivity by evenly distributing impact loads, while also improving lubrication and reducing contamination.

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Abstract

The invention relates to a roller with a wear-resistant layer applied at least partially to the outer surface of the roller by means of thermal spraying, wherein the wear-resistant layer contains tungsten carbide particles.
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Citation Information

Patent Citations

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  • Rolling mill having work roll shifting function

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  • Improved thermal spray coatings onto non-smooth surfaces

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