Production device and production method for on-line cooling of steel pipes

Abstract

The invention relates to a steel pipe production online heat treatment technology, in particular to a production device and method for steel pipe online cooling. The online cooling production device is arranged beside a main conveying roller way (1) line behind a sizing mill parallelly and comprises two pipe turning mechanisms (3,6), an online cooling roller way (4) transport line and online cooling equipment (5), and thus after-rolling online uniform cooling of hot-rolling seamless steel pipes (2) can be achieved. Through reasonable arrangement of the online cooling equipment, gradient control over the radial temperature of the steel pipes is achieved; through a steel pipe online cooling process control system, full-automatic control over after-rolling online cooling of the steel pipes isachieved, and the technical requirements of steel pipe products in the aspects of the final cooling temperature, the cooling rate, pipe surface temperature uniformity, cooled pipe shapes and the likeare met; and through a steel pipe online cooling basis automatic control system, the changeable steel pipe online cooling technical processes are achieved, and stable and smooth production is guaranteed.

Description

technical field [0001] The invention relates to on-line heat treatment technology for steel pipe production, in particular to a production device and production method for on-line cooling of steel pipes. Background technique [0002] For the production process of hot-rolled seamless steel pipes, considering the stability of the rolling line and the smoothness of production, in order to reduce the deformation resistance of metal materials in the process of pipe piercing and rolling deformation, the heating and forming process of the current pipe billet is usually required to be relatively high. within the temperature range. High-temperature heating and high-temperature deformation will make it difficult to use the controlled rolling method in the production of steel pipes, that is, to achieve the purpose of grain refinement through two-stage rolling deformation in the austenite recrystallization and non-recrystallization regions, resulting in a significant austenite structure...

AI Technical Summary

Problems solved by technology

[0008] The above devices are arranged on the steel pipe main transport roller table, which has a great impact on the production rhythm. Once a failure or maintenance is required, the production must be stopped.

Moreover, these devices and methods are only equipped with a basic automatic control system, and there is no effective measure to remove residual water in the pipe, so it is difficult to achieve high control accuracy and good cooling uniformity for the cooled steel pipe

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