Steel pipe continuous quenching process control method based on numerical simulation

Abstract

The invention relates to a steel pipe continuous quenching process control method based on numerical simulation. The method comprises the following steps that initial technological parameters of the continuous induction quenching process are calculated according to the moving linear speed and quenching cooling water spraying pressure of a steel pipe, and the initial technological parameters comprise a heating process technological parameter and a quenching process technological parameter; finite element analysis is carried out on the steel pipe continuous induction heating process, and the relation between the heating process technological parameter and the internal and external surface temperature of the steel pipe is obtained; finite element analysis is carried out on the steel pipe quenching cooling process, and the relation between the quenching process technological parameter and the steel pipe tissue distribution condition is obtained; according to the process control requirement, the heating process technological parameter and the quenching process technological parameter conforming to the technological control requirement are obtained, and a final steel pipe continuous induction quenching process control parameter is formed; the obtained control parameter is used for controlling the actual steel pipe continuous quenching process. Compared with the prior art, the method has the advantages of reducing energy consumption caused by technological parameter determining through preproduction, improving the working efficiency and the like.

Description

technical field [0001] The invention relates to a continuous quenching process for steel pipes, in particular to a method for controlling the continuous quenching process of steel pipes based on numerical simulation. Background technique [0002] Steel pipe quenching heat treatment plays a very important role in improving the overall performance of steel pipes. The quenching process is to heat the steel pipe to the austenitizing temperature, make it austenitized in whole or in part, and then rapidly cool it below the Ms point at a speed greater than the critical cooling speed. After quenching and cooling, the structure of the steel pipe is martensite, bainite and a small amount of retained austenite. [0003] At present, the continuous heat treatment equipment for steel pipes in China is mainly a walking flame furnace or a resistance furnace. This production method has simple process and low equipment cost, but it has high energy consumption and serious pollution. When us...

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Problems solved by technology

A large temperature difference will cause the steel pipe to be heated unevenly, resulting in quenching soft spots, insufficient hardness, and severe cases will lead to cracking, so the scope of application is relatively limited

[0007] The steel pipe induction heat treatment process is an extremely complex multi-object field, high temperature, dynamic and instantaneous process, and it is difficult to observe the physical property changes inside the material even with special sensing and testing instruments

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