Optimization of Hot Rolling Roughing Mill Rolls to Prevent Premature Occurrence of Contact Fatigue Damage
(Room 309)
06 May 19
2:00 PM
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2:30 PM
Many hot rolling mills worldwide are facing bonding zone fatigue problems on their roughing work rolls before reaching their scrap diameter. This can be explained through harder rolled steel grades, longer campaigns, reduced passes to increase mill throughput, or even inadequate backup or work roll maintenance. To help roll users optimize roll use, we developed a numerical tool to optimize roll geometries. This paper will review the influence of various roll geometries on roll stresses and how optimized geometries can decrease roll contact fatigue damage (crowning and chamfering procedure, shell thickness and material design, campaign length, etc.).