Introduction to the cold rolled steel in Kibo Steel Co., Ltd. In the processing of Cold Rolled Steel Sheet having a beautiful surface and an excellent workability. it first removes surface contamination for the cold rolled coil, heats to 600 ~ 850 ℃ from the annealing furnace, maintains for a certain time to get workability and treats surface and improve shapes through control rolling process
After removing iron oxide from the surface after cleaning hot rolled coil with acid, trying to roll to the target thickness for securing implementation.
Prior to the minimum annealing, passing rolling steel sheet into alkaline solution and removing rolling oil and dirt through a chemical reaction
During cold rolling, as the processing for softening the hardened materials of steel coil, ensuring the materials and the process through heating→splitting→quenching→annealing
Adjusting elongation 0.3~3.0% for roughness control and shape modification of the annealed coil
Pass Mill to be used for general purpose steel for drums, refrigerator doors, furniture manufacturing etc. used in the automotive for Roof, Fender, Hood, Quarter, Oil Pan, Quarter Spring House
The processing is not required but the intensity is needed for steel structure.
According to manufacturing methods and end-use, they are categorized as general-purpose, machining, deep drawing, TRIP steels. And among these Standard Edition is used for primarily automotive sheet Rail Lever, Parking Break, deep drawing for main outer fixture such as Fender and Hood and Trip type high tension steel for supplements such as the Door and Bump