It is a mold used in the process whereby liquid state of steel turns to solid.
It is an electro plating aimed to reduce production cost by Ni-B alloy plating to mold surfaces to prolong life of mold.
Recently production volume of crude steel using continuous casting is on rapid increase out of total domestic production of crude steel. Amid faster casting speed and more diverse materials in step with increase of production, width changeable technique is needed to alter size of products during casting. So, conditions of mold become worse to use, causing severe damage to plates. For this reason, it aims to reduce cost by M/W plating on this mold and minimized loss to plates.