Large shell ring differential temperature rolling uniform cooling system and method

Abstract

The invention discloses a large shell ring differential temperature rolling uniform cooling system and method, and relates to the technical field of steel rolling metallurgy processes. The cooling system comprises cooling units, temperature detection units, a data processing unit and a control unit. Each cooling unit comprises a plurality of inner cooling devices and a plurality of outer cooling devices; the inner cooling devices are used for performing jet cooling on the inner wall surface of a shell ring; the outer cooling devices are used for conducting jet cooling on the outer wall face of the shell ring, and the multiple outer cooling devices are in one-to-one correspondence with the multiple inner cooling devices; each temperature detection unit comprises a first temperature acquisition device for acquiring temperature values of the inner wall surface and the outer wall surface, positioned on the front side of a roller, of the shell ring in real time; the data processing unit can receive the temperature value, establish a temperature model according to the temperature value and generate a dynamic valve model; and the control unit can adjust the flow of the inner cooling devices or the outer cooling devices according to the dynamic valve model. The invention further provides a large shell ring differential temperature rolling uniform cooling method.

Description

technical field [0001] The present application relates to the technical field of metallurgical technology of steel rolling, in particular to a uniform cooling system and method for differential temperature rolling of large-scale drum segments. Background technique [0002] Large-scale barrel joints are one of the key components used in major equipment in the fields of nuclear power, petrochemical, and coal chemical industries. Because they are often used in harsh environments, the requirements for their external quality and internal performance are very high. In recent years, with the rapid development of my country's economy, the demand for large tube joints is also increasing. The large-scale cylinder section has large geometric dimensions (diameter up to 8m, axial width up to 3m and radial thickness up to 0.5m), and its weight can reach hundreds of tons. [0003] Differential temperature rolling refers to rolling while cooling during the rolling process, but the cooling ...

AI Technical Summary

Problems solved by technology

The differential temperature rolling technology can cope with the large radial thickness of the large-scale cylindrical section, the plastic deformation is uneven during the rolling process, and the metal deformation of the inner and outer layers is prone to be large, while the deformation of the radial center layer of the cylindrical section is small, and even the plastic deformation is difficult to penetrate into the In the core, the grains of the core structure are coarse and uneven, and the coarse grains and uneven grains cause the performance of the barrel section to decrease, and even cracks cause the barrel section to be scrapped.

[0004] However, in the existing annular cooling method, due to the difference in gravity and spray angle of the cooling medium, the cooling of each part of the barrel section will be different, and as the size and thickness of the rolled barrel section change, the required The cooling capacity is also different. In addition, since both sides of the barrel section in the axial width direction contact the outside world, the cooling speed is slower than the center. Therefore, simple annular cooling is not suitable for large-scale barrel section cooling and uniform cooling.

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