Cooling bed controlled cooling device for hot-rolled micro-alloyed steel bars

Abstract

The invention discloses a cooling bed controlled cooling device for hot-rolled micro-alloyed steel bars, and belongs to the technical field of hot-rolled micro-alloyed steel bar equipment. Three cooling sections and a cooling bed control system are included. The three cooling sections are an organization regulation and control cooling area I, an organization regulation and control cooling area IIand an organization regulation and control cooling area III, the length of each section of organization regulation and control cooling area is 100-120 m, and the length of a whole cooling bed is covered. The cooling bed controlled cooling device has the advantages that through segmented arrangement, the cooling path is optimized, a process window is provided for control over precipitation of micro-alloy elements in the cooling process and refining of pearlite sheet interlamellar spacing is provided, and accordingly the refined controlled cooling technology is achieved.

Description

technical field [0001] The invention belongs to the technical field of hot-rolled micro-alloyed steel bar equipment, and in particular provides a cooling bed controlled cooling device for hot-rolled micro-alloyed steel bar. The cooling path is optimized by segmented arrangement, which provides a process window for controlling the precipitation of microalloying elements during cooling and refining the interlamellar spacing of pearlite, thereby realizing finely controlled cooling process. Background technique [0002] It is well known that the cooling bed cooling of hot-rolled ribbed steel bars at home and abroad is mainly air-cooled or air-cooled, but due to the limited cooling speed, it cannot be cooled to the target temperature quickly. At the same time, the air-cooling process and the air-cooling process have a slow cooling rate, and the temperature is always in the austenite zone during the cooling process of the cooling bed, which is not conducive to the precipitation of...

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Problems solved by technology

[0002] It is well known that the cooling bed cooling of hot-rolled ribbed steel bars at home and abroad is mainly air-cooled or air-cooled, but due to the limited cooling speed, it cannot be cooled quickly to the target temperature

At the same time, the air-cooling process and the air-cooling process have a slow cooling rate, and the temperature is always in the austenite zone during the cooling process of the cooling bed, which is not conducive to the precipitation of microalloying elements in the ferrite zone, and is also not conducive to the formation of fine pearlite structure.

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