Medium-frequency quenching process of smoothing roll and quenching equipment thereof

Abstract

The invention relates to a medium-frequency quenching process of a smoothing roll and quenching equipment thereof. The process is characterized by comprising the following steps: placing an inductive part of a medium-frequency inductor on a surface of the smoothing roll to be quenched; fixing the medium-frequency inductor and setting the smoothing roll in a rotary movement to form a state that the quenching part of the smoothing roll continuously moves in the medium-frequency inductor gradually; inputting a medium-frequency current to the medium-frequency inductor, wherein the surface, close to the medium-frequency inductor, of the smooth roll is subjected to electromagnetic induction to generate vortex in the smoothing roll so as to heat the surface, close to the medium-frequency inductor, of the smoothing roll; when the surface of the smoothing roll is heated to the austenitizing temperature, transferring to a spraying and cooling region to quench so as to realize a local quenching flow; and continuously rotating the smoothing roll to gradually and continuously quench the surface of the smoothing roll through the medium-frequency inductor. The process has the advantages that the medium-frequency heating power equipment is less in power requirement, the inductor is simple to manufacture and low in cost, and the process can be suitable for surface quenching thermal treatment of smoothing rolls in various specifications by changing the inductor and adjusting the rotating speed of the smoothing speed.

Description

technical field [0001] The invention relates to an intermediate frequency quenching process and quenching equipment for straightening roller surface quenching on a profile straightening machine in a steel factory. Background technique [0002] Straightening rollers need to ensure a certain hardness on the surface of the straightening rollers to straighten the profiled steel. At present, in order to ensure the surface hardness of the straightening rollers, intermediate frequency or power frequency quenching equipment is usually used to conduct overall heating and cooling quenching on the surface of the straightening rollers. This kind of heat treatment process requires a lot of power for intermediate frequency or industrial frequency equipment, and the inductor is complicated to manufacture and the cost is high. Contents of the invention [0003] In order to overcome the problems that the overall surface quenching of the straightening roller requires large power for interme...

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Problems solved by technology

[0003] In order to overcome the problems that the overall surface quenching of the straightening roller requires large power for intermediate frequency or industrial frequency equipment, and the production of inductors is complicated and high cost, the present invention provides a low power requirement for intermediate frequency or industrial frequency equipment, and the inductor is simple and easy to manufacture. low cost

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