Verification method for cooling uniformity of novel ultra-fast cooling process

Abstract

The invention discloses a novel method for verifying cooling uniformity of an ultra-fast cooling process, and relates to the technical field of ultra-fast cooling, and the method comprises the following steps: taking a test board, and coating paint in a rectangular area on the surface of the test board; and operating the ultrafast cooling equipment, observing the striking effect of header cooling water in the ultrafast cooling equipment on the paint surface of the test plate, and determining the cooling uniformity of the ultrafast cooling process based on the striking effect of the paint surface. According to the invention, dynamic or static strike test is carried out on the paint surface on the test plate, and the contact condition of cooling water flow and a steel plate in the ultra-fast cooling equipment can be visually fed back, so that whether the nozzle blockage condition exists or not is judged, the position of the blocked nozzle is determined, the blocked nozzle is conveniently treated, and the cooling uniformity of the ultra-fast cooling equipment is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ultra-fast cooling, in particular to a new type of verification method for cooling uniformity of ultra-fast cooling process. BACKGROUND

[0002] The on-line controlled cooling technology is widely used in the field of medium plate rolling, and the transverse cooling uniformity of the steel plate is affected by the nozzle blockage, cooling process setting and other working conditions. The existing transverse uniformity detection methods mainly include detecting the transverse performance uniformity of the material and passing through the water tank with equal interval. The two methods are limited by the sample length and the water tank processing size, and can only feedback the uniformity of each section in the width direction, and cannot intuitively feedback the contact condition of the water flow and the steel plate surface. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a new type of verification method for cooling uniformity of ultra-fast cooling process.

[0004] In order to solve the above technical problems, the technical scheme of the present application is as follows: A verification method for cooling uniformity of a new type of ultra-fast cooling process, comprising: Taking a test plate, and coating paint on the rectangular area on the surface of the test plate; Running the ultra-fast cooling equipment, observing the impact effect of the header cooling water in the ultra-fast cooling equipment on the paint surface of the test plate, and determining the cooling uniformity of the ultra-fast cooling process based on the impact effect of the paint surface.

[0005] As a preferred scheme of the verification method for cooling uniformity of the new type of ultra-fast cooling process, wherein: the running of the ultra-fast cooling equipment, observing the impact effect of the header cooling water in the ultra-fast cooling equipment on the paint surface of the test plate comprises: Controlling the running of the ultra-fast cooling equipment, placing the test plate in the ultra-fast cooling equipment, and taking out after ultra-fast cooling treatment; Removing the residual water on the surface of the test plate, observing the impact marks in the rectangular area coated with paint, if the width of the strip-shaped concave marks in the rectangular area is uniform, and the strip-shaped concave marks are continuous, it indicates that the cooling uniformity of the ultra-fast cooling equipment meets the requirements; if the width of the strip-shaped concave marks in the rectangular area is not uniform or the strip-shaped concave marks are discontinuous, it indicates that the cooling uniformity of the ultra-fast cooling equipment does not meet the requirements.

[0006] As a preferred scheme of the verification method for cooling uniformity of the new type of ultra-fast cooling process, wherein: the running of the ultra-fast cooling equipment, observing the impact effect of the header cooling water in the ultra-fast cooling equipment on the paint surface of the test plate comprises: Place the test plate directly below the cooling manifold of the ultra-fast cooling device, run the cooling manifold, and perform a static impact test on the paint surface to observe whether the pits formed on the paint surface are evenly distributed. If the pits are evenly distributed and the difference between the diameters of any two pits is less than or equal to a threshold value, it indicates that the cooling uniformity of the ultra-fast cooling device meets the requirements. If the pits are not evenly distributed or the difference between the diameters of any two pits is greater than the threshold value, it indicates that the cooling uniformity of the ultra-fast cooling device does not meet the requirements.

[0007] As a preferred embodiment of the verification method of the cooling uniformity of the new ultra-fast cooling process, the coating of paint on the rectangular area of the test plate includes: The thickness of the paint coating is controlled to be 3-5 mm, and the paint coating time is controlled to be less than or equal to 2 min.

[0008] As a preferred embodiment of the verification method of the cooling uniformity of the new ultra-fast cooling process, the target area is a rectangular area, and the length of the rectangular area is 2200 mm and the width is 300 mm.

[0009] As a preferred embodiment of the verification method of the cooling uniformity of the new ultra-fast cooling process, the control of the operation of the ultra-fast cooling device includes: The flow rate of the cooling manifold is controlled to be 100 m 3 / s, and the cooling roller speed is 1.0 m / s.

[0010] As a preferred embodiment of the verification method of the cooling uniformity of the new ultra-fast cooling process, the removal of residual water on the test plate includes: Tilt the test plate to remove residual water on the surface of the test plate.

[0011] The beneficial effects of the present application are: The present application can intuitively feedback the contact between the cooling water flow and the steel plate in the ultra-fast cooling device through dynamic or static impact test on the paint surface of the test plate, so as to determine whether there is nozzle blockage and determine the position of the blocked nozzle, facilitate the processing of the blocked nozzle, and ensure the cooling uniformity of the ultra-fast cooling device. DETAILED DESCRIPTION

[0012] In order to make the content of the present application more easily understood, the present application will be further described in detail according to the specific embodiments.

[0013] Embodiment 1: The present embodiment provides a verification method of the cooling uniformity of a new ultra-fast cooling process, which specifically includes the following steps: Step S101: Take a test plate and coat paint on the target area of the test plate.

[0014] Specifically, a suitable paint viscosity is selected, and the paint is coated on a rectangular area on the surface of the test plate.

[0015] It should be noted that the time for coating the paint needs to be controlled to be less than or equal to 2 min, so as to avoid that the coated paint dries and cannot generate the cooling water impact marks. The coating thickness of the paint is 3-5 mm.

[0016] In this embodiment, the length of the target rectangular area is 2200 mm, and the width is 300 mm.

[0017] Step S102: Control the operation of the ultra-fast cooling device, place the test plate in the ultra-fast cooling device, and take out the test plate after the ultra-fast cooling treatment.

[0018] Specifically, the operation of the ultra-fast cooling device is controlled, and the test plate is treated according to the normal steel plate cooling process, that is, the test plate enters the ultra-fast cooling device from the entrance of the ultra-fast cooling device, and is taken out from the exit of the ultra-fast cooling device after the ultra-fast cooling treatment. The paint surface of the test plate is dynamically impacted by the ultra-fast cooling device.

[0019] In this embodiment, the cooling header flow is controlled to be 100 m 3 / h, and the cooling roller speed is 1.0 m / s.

[0020] Step S103: Remove the residual water on the surface of the test plate, and observe the impact marks in the rectangular area coated with the paint. If the widths of the strip-shaped recesses in the rectangular area are uniform, and the strip-shaped recesses are continuous, it indicates that the cooling uniformity of the ultra-fast cooling device meets the requirements. If the widths of the strip-shaped recesses in the rectangular area are not uniform, or the strip-shaped recesses are discontinuous, it indicates that the cooling uniformity of the ultra-fast cooling device does not meet the requirements.

[0021] Specifically, after the test plate is treated by the ultra-fast cooling device, a plurality of strip-shaped recesses are formed on the paint surface in the rectangular area of the test plate. These strip-shaped recesses are arranged uniformly along the length direction of the test plate, and each strip-shaped recess extends along the width direction of the test plate. If the cooling uniformity of the ultra-fast cooling device meets the requirements, the widths of the strip-shaped recesses formed on the paint surface in the rectangular area are uniform, and the strip-shaped recesses are continuous. If the cooling uniformity of the ultra-fast cooling device does not meet the requirements, the widths of the strip-shaped recesses formed on the paint surface in the rectangular area are not uniform, or the strip-shaped recesses are discontinuous. The cooling uniformity of the ultra-fast cooling device can be determined by observing the strip-shaped recesses.

[0022] In addition, according to the position of the impact unevenness in the paint surface, the position of the nozzle with the blocking condition can be obtained, so as to facilitate the treatment of the faulty nozzle.

[0023] Embodiment 2: The embodiment provides a verification method for the cooling uniformity of a new ultra-fast cooling process, which specifically includes the following steps: Step S101: take the test plate and coat the paint on the target area on the surface of the test plate.

[0024] Specifically, the viscosity of the paint is selected, and the paint is coated on the rectangular area on the surface of the test plate.

[0025] It should be noted that the time for coating the paint is controlled to be less than or equal to 2 min, so as to avoid that the coated paint is dried and cannot produce the cooling water impact marks. The coating thickness of the paint is 3-5 mm.

[0026] Step S102: place the test plate directly below the cooling header of the ultra-fast cooling device, run the cooling header, perform the static impact test on the paint surface, and observe whether the pits formed on the paint surface are uniformly distributed. If the pits are uniformly distributed and the difference between the diameters of any two pits is less than or equal to a threshold value, it indicates that the cooling uniformity of the ultra-fast cooling device meets the requirements. If the pits are not uniformly distributed or the difference between the diameters of any two pits is greater than the threshold value, it indicates that the cooling uniformity of the ultra-fast cooling device does not meet the requirements.

[0027] Specifically, the static impact test on the paint surface of the test plate is performed by the cooling water flowing out of the cooling header. Whether the nozzle blockage exists can be determined by observing the pits formed on the paint surface, and the position of the nozzle with blockage can be determined by the position of the uneven pits, so as to facilitate the processing of the fault nozzle.

[0028] Therefore, the technical scheme of the present application can intuitively feedback the contact condition of the cooling water flow and the steel plate in the ultra-fast cooling device by performing the dynamic or static impact test on the paint surface of the test plate, so as to determine whether the nozzle blockage exists and determine the position of the blocked nozzle, facilitate the processing of the blocked nozzle, and ensure the cooling uniformity of the ultra-fast cooling device.

[0029] In addition to the above embodiments, the present application can have other implementation manners; any technical scheme formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present application.

Claims

1. A new method for verifying cooling uniformity of ultra-fast cooling process, characterized by: include: Take the test panel and apply paint to the target area on the surface of the test panel; Run the ultra-fast cooling equipment to observe the impact effect of the header cooling water on the painted surface of the test board. Based on the impact effect on the painted surface, determine the cooling uniformity of the ultra-fast cooling process.

2. The method for verifying cooling uniformity of the novel ultrafast cooling process according to claim 1 is characterized in that: The operation of the ultra-fast cooling equipment and the observation of the impact of the header cooling water in the ultra-fast cooling equipment on the painted surface of the test board include: Controlling the operation of the ultra-fast cooling device, placing the test plate in the ultra-fast cooling device, and taking it out after ultra-fast cooling treatment; Remove excess water from the test plate and observe the striking marks in the target area coated with paint. If the width of the stripe dents in the target area is uniform and continuous, it means that the cooling uniformity of the ultra-fast cooling equipment meets the requirements; if the width of the stripe dents in the target area is uneven or there are discontinuous stripe dents, it means that the cooling uniformity of the ultra-fast cooling equipment does not meet the requirements.

3. The method for verifying cooling uniformity of the novel ultrafast cooling process according to claim 1 is characterized in that: The operation of the ultra-fast cooling equipment and the observation of the impact of the header cooling water in the ultra-fast cooling equipment on the painted surface of the test board include: Place the test plate directly below the cooling manifold of the ultra-fast cooling equipment, operate the cooling manifold, perform a static impact test on the paint surface in the target area, and observe whether the pits formed on the paint surface are evenly distributed. If the pits are evenly distributed and the difference in diameter between any two pits is less than or equal to the threshold, it means that the cooling uniformity of the ultra-fast cooling equipment meets the requirements; if the pits are unevenly distributed or the difference in diameter between any two pits is greater than the threshold, it means that the cooling uniformity of the ultra-fast cooling equipment does not meet the requirements.

4. The method for verifying cooling uniformity of the novel ultrafast cooling process according to claim 1 is characterized in that: The method of applying paint to the target area on the surface of the test plate includes: Control the paint coating thickness to 3~5mm and the paint coating time to be less than or equal to 2min.

5. The method for verifying cooling uniformity of the novel ultrafast cooling process according to claim 1 is characterized in that: The target area is a rectangular area with a length of 2200 mm and a width of 300 mm.

6. The method for verifying cooling uniformity of the novel ultrafast cooling process according to claim 2 is characterized in that: The control of the operation of the ultra-fast cooling device includes: Control the cooling header flow to 100m 3 / h, and the cooling roller speed is 1.0m / s.

7. The method for verifying cooling uniformity of the novel ultrafast cooling process according to claim 2 is characterized in that: The removing of residual water from the test plate surface comprises: Tilt the test panel to remove excess water from the surface of the test panel.