鍛造背輥 & 工輥 / 鋼胚
Back-up rolls / Work rolls / Ingot

• Ingot

Key Facilities - Ingot: 100 tonne Birlec Electric Arc Furnace (EAF) equipped with Sliding Gate Tap Hole (for slag free tapping) 100 tonne Finkl Vacuum Argon Degassing Unit (VAD) 90 tonne Vacuum Oxygen Decarburising Unit (VOD) Vacuum Tanks for stream degassing ingots up to 285 tonnes Casting bay with shallow pit, deep pit, air cast and argon shroud facilities Hot Boxes, fully insulated for slow cooling ingots after teeming Annealing furnaces for annealing of ingots

• Back-up rolls

• Production of forged steel back up rolls ranging from 5 to 170 tonnes finished weight.
• Leading supplier of rolls for use in ferrous and non ferrous applications; both hot and cold rolling.
• Typical roll materials are 3%, 4% and 5% CrMoV steels. These are differentially or conventionally hardened and supplied in the turned and finish ground condition.
• Neck rings and bearing sleeves can be fitted where required.
• Production of back up rolls with a maximum barrel diameter of 2.2 metres and a maximum overall length of 20 metres can be achieved.
• Tandem mill rolls can be produced up to a maximum weight of 60 tonnes. The maximum finished weight limit for plate mill rolls is 170 tonnes.
• Tandem mill back-up roll can be supplied with barrel hardness levels within the range 55 to 75 Shore C. Surface hardness is constant throughout the working life of the roll.
• Plate mill back-up roll can be supplied with barrel hardness levels within the range 50 to 55 Shore C. Surface hardness is constant throughout the working life of the roll.
• The tempered bainitic shell on Selas treated tandem mill back-up rolls offers high wear resistance with the pearlitic core giving improved ductility.

• Work rolls

• Work rolls are supplied finish machined and hardened to customer specification.
• Rolls can be manufactured in 3-5%Cr in both ESR and air-melt qualities.
• Work rolls are hardened on a computer controlled progressive dual frequency induction hardening machine. This provides accurate control over the hardening process resulting in consistent hardness profiles from roll to roll.
• Sub-zero cryogenic treatment completes the hardening process maximising the depth of hardness and reducing retained austenite to minimum levels.
• A full range of ancillary services is available such as roll re-hardening, conversion and renovation.
• An after sales service is provided to ensure customers maximise productivity from back up and work rolls.
• Work, intermediate and small back-up rolls up to 12 Tonnes finished weight are produced in a dedicated manufacturing facility.
• Work rolls with up to 100mm working life on diameter can be supplied.
• Post forge heat treatment ensures maximum texturing response for all known texturing processes.
• Rolls up to 12 tonnes can be supplied with a maximum diameter of 860mm and a maximum overall length of 5350mm.