Tunnel steel pipe quenching device and quenching method thereof

Abstract

The invention discloses a tunnel steel pipe quenching device and a tunnel steel pipe quenching method, relating to a seamless steel pipe production device and solving a problem that the current quenching device can not regulate the cooling speed of the steel pipe under different temperatures in the tunnel according to different cooling speeds needed for steel pipe material phase change. The quenching area of a quenching tunnel provided by the invention comprises units, which are independently controlled by a quenching area, a relative slow cooling area and a slow cooling unit respectively. The quenching method comprises the following steps: (1) after a roller drives the steel pipe to enter the quenching area, starting a water pump to carry out large-flow water injection cooling; (2) after the roller drives the steel pipe to enter the relative slow cooling area of the tunnel, starting the water pump to carry out small-flow water injection cooling; (3) after the roller drives the steel pipe to enter the slow cooling area of the tunnel, carrying out gas injection mixed cooling. The quenching device is used for a seamless steel pipe thermal treatment production line so as to precisely adjust the cooling speed at different temperatures of the steel pipe in a quenching process, thereby improving the quality of the steel pipe product.

Description

technical field [0001] The invention relates to a production method of a seamless steel pipe, in particular to a tunnel type steel pipe quenching equipment and a quenching method of a steel pipe heat treatment production line. technical background [0002] The performance of the tunnel quenching equipment in the steel pipe heat treatment production line has an important impact on the quality of the finished steel pipe and the production efficiency of the entire unit. [0003] Existing tunnel type steel pipe quenching equipment, such as figure 1 , 2 As shown: the roller table device 1 forms an angle of 10° with the tunnel axis to ensure that the steel pipe advances while rotating during the quenching process. The quenching tunnel 2 is installed on the tunnel support 3, driven by the lifting device 4 to move up and down, so that the height can be adjusted to adapt to steel pipes of different diameters. The above roller table device 1, quenching tunnel 2, tunnel support 3, l...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art, provide a tunnel type steel pipe quenching equipment and its quenching method, solve the problem that the existing quenching equipment cannot adjust the steel pipe at different temperatures in the tunnel according to the different cooling speeds required by the phase change of the steel pipe material The cooling rate, which affects the quenching quality of the steel pipe

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