| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Advances in Ferrous Metallurgy
|
| Presentation Title |
Failure Investigation and Crack Characterization of a HSS Roll Spalling in Hot Strip Mill |
| Author(s) |
Piyas Palit, Prabhas Gokarn, Kuppili Padma Sri, Soumendu Monia, Anup Kumar |
| On-Site Speaker (Planned) |
Kuppili Padma Sri |
| Abstract Scope |
In hot rolling mills, failure of work rolls is a major concern as it adversely affects the mill operation as well as production. Analysis of spalled roll materials and actual rolling conditions in service are therefore necessary to understand the roll failure mechanism. HSS cast iron rolls are used in the finishing mill for rolling of sheet. This present case study describes one of the finishing stand work roll spalling and analysis using destructive as well as non-destructive testing techniques. The spalled roll showed fatigue arrest marks in a continuous path along the circumferential direction. Characteristic features of the fracture surface were indicated surface-initiated spalling which is known as ribbon fatigue spalling. The spalled region was analyzed with Ultrasonic test to identify the origin of the crack. A sample was collected from the crack origination location. Detail microstructural and SEM characterization of crack revealed fire cracks. |