Past Events

Hot Flat Rolling Fundamentals — A Practical Training Seminar in conjunction with Plate Rolling Fundamentals Training

Attendees of Hot Flat Rolling Fundamentals — A Practical Training Seminar in conjunction with Plate Rolling Fundamentals Training gathered in Orlando, Fla., on 19–23 February.
Attendees of the Plate Rolling Track listen to a presentation.

The AIST Hot Sheet Rolling Technology Committee, together with the Plate Rolling Technology Committee, held Hot Flat Rolling Fundamentals — A Practical Training Seminar in conjunction with Plate Rolling Fundamentals Training in Orlando, Fla., on 19–23 February 2012. This training conference was nearly sold out, with more than 130 attendees. The conference started with a networking reception held during registration. The classroom-style training began the next morning, with Nathan Berry of North Star Bluescope Steel presenting, “Safety — The 24-Hour Commitment,” which stressed that each of us is responsible for our own safety all the time. After the first of a number of short breaks which allowed the attendees more opportunities to network, Frank Beddings of Danieli Corp. followed with a presentation on the history of hot rolling. This led into a presentation by John Speer of Colorado School of Mines, entitled, “The Review of Metallurgical Basics,” which included the basics of solid-state metallurgy, as well as the basics of mechanical properties. Dr. Speer then presented, “Application of Fundamentals to Hot Rolled Processing/Products,” which provided an understanding of the different grades that are processed through hot strip mills. Paul Debski of Bricmont taught the key aspects of heating in reheat and tunnel furnaces. Beddings then presented, “Roughing Mill Area Equipment,” explaining that the goal of the roughing mill area equipment is to prepare the slab/transfer bar for presentation into the finishing stands. The day ended with a question and answer session, which gave the attendees an opportunity to have their specific questions answered by the presenters.
The next day began with Frank Beddings describing the finishing mill equipment and its function in reducing the steel to the customer-required flatness and thickness. Evgueni Nikitenko of United States Steel Corporation presented, “Flatness With Profile Control,” by first explaining what flatness defects are and common causes. He went on to explain the sensors and the controls for the equipment within the mill that produces the flatness profile. Wlodzimierz Filipczyk of TMEIC Corp. presented, “Gauge and Width Control in Hot Rolling,” explaining the mill controls and the equipment used to control the thickness. Christy Hofherr of Spraying Systems explained descaling, roll cooling and spray issues in hot rolling. Michael Peretic of SMS Siemag described the objectives and equipment of the runout table cooling systems, as well as new developments.
The format for the third day was different than the first two days, in that there was a separate track for hot mills and plate mills. The hot mill track began with a contrast of mini-mill operations vs. integrated mill operations by Brendan Brophy of North Star BlueScope Steel. The application, process and benefits of a coilbox were discussed by Darryl Metcalf of Hatch Ltd. Brophy followed with the finishing mill operations and factors influencing temperature control through the mill. Mark Blankenau of Severstal Dearborn explained the attributes of the slab product coming into the mill and its effects on operations and quality, followed by a session on hot rolling defects as related to dimensional defects and mechanical properties. Peretic ended the day with new technical developments in hot rolling mill related to coordinated application of roll gap lubrication, work roll cooling and anti-peeling systems, as well as compact cooling as an alternative to alloying for production of dual-phase/TRIP steel grades. The plate rolling track began with Emin Erman of ArcelorMittal Conshohocken explaining the Steckel mill process, followed by Jennifer Grzyb of Siemens, who gave an explanation of the Steckel mill equipment. Charlie Romberger of ArcelorMittal covered the discrete plate rolling process, followed by Eric Thokar of Siemens VAI, who explained the discrete plate rolling and plate finishing equipment. Dave Withrow of Allor Manufacturing covered the practical aspects of plate rolling. Holger Kehler of LOI Thermprocess finished the plate rolling session by explaining different operating processes and equipment for plate heat treating.
Both groups reconvened on the final day, which began with Jose de Jesus of Xtek describing the practical considerations for operating and maintaining a hot strip mill downcolier. George Ott of Union Electric Steel explained optimizing roll performance through proper selection of rolls. John LaBelle of Akers National Roll Co. covered the basics of roll shops, including the equipment and practices. Ron Webber of Webber Roll Technology explained controlling the quality of the roll surface. Peter Campbell provided an update on the Castrip process and the next phase of implementation. To close the program, Andreas Jungbauer of Siemens VAI described the new hot rolling development called endless strip production.