Speaker
Description
Understanding and investigating roll failures in the hot mill is a very complicated subject. Post-mortem analysis requires for precision insights and actual data of the rolling mill. It requires deep technical knowledge of the subject of rolls and the rolling process.
The present papers captures the journey into the investigation of Tata Steel’s Compact Strip Process (CSP) Back Up Roll ( BUR ) failure and Roughing Mill Back Up Work Roll ( RMBUR ) Failure of the conventional Hot Strip Mill (HSM) at Jamshedpur.
In the case of CSP BUR, it was found that the failure was due excess rolling contact fatigue damage accumulation on the edges of the BUR.
In the case of HSM RMBUR failure, it was found that it was a case of barrel edge push off which is due to high contact stress accumulation due to chamfer design and excess differential roll forces in the roughing mil.
Detailed investigations in both the cases were done through visual examination of the spalled roll surfaces, rolling signals analysis, metallographic examination and literature review.
The proposed corrective actions taken have helped us in preventing further roll failures till date.
| Speaker Company/University | TATA STEEL INDIA |
|---|