摘要:
One embodiment of the present invention provides an endless rolling apparatus and method, which have improved cooling conditions for producing advanced high strength steel, and the endless rolling apparatus according to one aspect of the present invention comprises: a continuous casting machine for casting a slab; and a cooling bed having at least one piece of water-cooling equipment and at least one rolling mill continuously connected to the continuous casting machine, wherein, in the cooling bed, an initial position (S) at which the water-cooling equipment is provided so as to manufacture advanced high strength steel through at least one water-cooling is defined by mathematical formula 1 below.
Here, H is the thickness (mm) of a slab, V is the casting speed (m/sec) of the slab, h is the product thickness (mm), and t is the target arrival time (sec) until entry into the cooling bed.
摘要:
A continuous casting and rolling apparatus, according to an embodiment of the present invention, comprises: a continuous casting machine that produces a slab; a rolling mill that includes a roughing mill located on a side of the outlet of the continuous casting machine and a finishing mill located on a side of the outlet of the roughing mill and makes the slab subjected to rolling; a cutting machine located on a side of the inlet of the roughing mill and/or on a side of the inlet of the finishing mill; and a controller that is electrically connected with the cutting machine to control the driving of the cutting machine and determines whether to perform mode switching between a continuous rolling mode in which the slab is supplied as a continuous body from the continuous casting machine and the rolling mill and a discontinuous rolling mode in which the slab is cut by the cutting machine in order to select the continuous or discontinuous rolling mode, wherein a predetermined expression is satisfied in a case where the controller selects the continuous rolling mode.
摘要:
A rolling method according to one embodiment of the present invention may comprise: a rolling step for screwing down a supplied slab; and a heating step, performed prior to or during the rolling step, for heating the slab by placing a heater in the travel path of the slab immediately after a spot of the slab at which the height of the slab uniformly converges passes through the position of the heater in the travel direction of the slab, wherein the heater elevates or retains the temperature of the slab. A continuous casting rolling method according to another embodiment of the present invention comprises: a continuous casting step for producing a slab; a rolling step; and a heating step, wherein the heating step places a heater in the travel path of the slab immediately after the initial spot of the slab at which the height of the slab in the direction perpendicular to the travel direction of the slab begins to be constant passes through the position of the heater in the travel direction of the slab. In addition, another embodiment of the present invention suggests a continuous casting rolling device for performing the aforementioned method.
摘要:
The present invention provides continuous casting-milling equipment and method capable of switching between continuous and batch milling, which increase the process yield rate by reducing the portion which is unavoidably processed as scrap, when switching casting or at an initial stage. The continuous casting-milling equipment comprises: a casting unit; at least two rolling units; and a coil box arranged between the rolling units. The continuous casting-milling method comprises: a casting step for producing a slab; a first rolling step which reduces the thickness of the slab; a cutting step of cutting a predetermined distance from a front end portion of the slab at the initial stage of casting; a passing step of passing the continuously supplied slab through the coil box; and a second rolling step which reduces the thickness of the passed slab.