A device and method for removing residual water on the surface of roller quenching of plate and strip

Abstract

The invention belongs to the technical field of heat treatment equipment for metal plates and strips. It provides a device and method for removing residual water on the surface of roller quenching of plates and strips. The device includes a device for removing residual water in the front of the high-pressure cooling zone of a roller quenching machine, a roller quenching machine Residual water removal device in the high-pressure cooling zone of the machine, residual water removal device in the high-pressure cooling zone-low-pressure cooling zone of the roller quenching machine, residual water removal device in the low-pressure cooling zone of the roller quenching machine, and residual water removal device in the rear of the low-pressure cooling zone of the roller quenching machine. . This method can significantly remove the residual cooling water on the upper surface of the plate and strip in processes such as roller quenching, solid solution, and controlled cooling, expand the area of ​​the single-phase forced jet area, and achieve uniform, controllable, and efficient heat exchange on the upper surface of the plate and strip. Significantly improve the cooling intensity, uniformity and plate shape of plate and strip heat treatment, and achieve high-quality heat treatment.

Description

technical field [0001] The invention belongs to the technical field of heat treatment equipment for metal plates and strips, and relates to a device and method for removing residual water on a roll-type quenching surface of a plate and strip. Background technique [0002] The roller quenching machine has strong cooling capacity, uniform cooling, and good shape of the plate and strip after cooling. It can be used in the production of carbon steel, stainless steel, special alloy, titanium alloy, aluminum alloy and other metal plates and strips, such as quenching, solid solution, and controlled cooling. , is the main form of cooling equipment for large heat treatment lines. The roller quenching machine adopts the jet impact quenching method, high-pressure, large-flow cooling water impacts the upper and lower surfaces of the plate and strip at high speed, pierces the surface steam film, and realizes direct single-phase forced convection heat exchange with the wall surface. Good...

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Problems solved by technology

[0003] During the roller quenching process of the plate and strip, the jet cooling water on the lower surface falls freely under the action of gravity, and the lower surface is similar to jet impact single convective heat transfer, while the upper surface of the plate and strip cannot be drained instantaneously due to the residual cooling water, and remains in the strip. The upper surface of the material affects the jet impact heat transfer process, so that the upper surface heat transfer area is divided into single-phase forced convection heat transfer area, film boiling area, nucleate boiling area, transitional boiling area, and small liquid accumulation area when the plate and strip are quenched. etc., the heat transfer form is complicated, and the heat transfer process is difficult to effectively control

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