Method and device for carrying out uniform heating or differential heating on sheet steel in rapid non-deformation non-oxidation mode

Abstract

The invention provides a method and a device for carrying out uniform heating or differential heating on sheet steel in a rapid non-deformation non-oxidation mode. The method is characterized in that: the contact heat transfer between each heating template and the sheet steel to be heated is utilized to realize the rapid heating of the sheet steel to be heated; clamping force of the heating templates is utilized to prevent the deformation of the sheet steel; a protection atmosphere which is formed between the heating templates is utilized to avoid the oxidation of heat exchange surfaces of the heating templates and the sheet steel to be heated; and the contact heat exchange coefficient between different positions of the heat exchange surfaces of the heating template and the sheet steel to be heated is changed to realize the controllable differential heating of the sheet steel to be heated.

Description

technical field [0001] The invention belongs to the field of iron and steel heat treatment and hot stamping forming, and in particular relates to a method and equipment capable of performing rapid, non-deformation, non-oxidation uniform heating or differential temperature heating on thin steel plates. Background technique [0002] Hot stamping and heat treatment of thin steel sheets is a processing technology widely used in various industrial fields, especially in the field of automobile body parts manufacturing. The process includes 1) heating the thin steel plate to a specified temperature, and 2) performing specified forming and / or processing operations on the high temperature thin steel plate. The method of heating the steel sheet has a great influence on the efficiency and operability of the hot stamping or heat treatment process as well as on the quality of the final part. At present, there are three main heating methods for thin steel plates: box furnace heating, fla...

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Problems solved by technology

At present, there are three main heating methods for thin steel plates: box furnace heating, flame heating and induction heating. The common disadvantage is that the heating process will cause serious deformation of thin steel plates.

On the other hand, because the heating speed of the box furnace is slow, in order to match the rhythm of the subsequent hot stamping or heat treatment process and prevent the occurrence of decarburization and oxidation, the furnace body must be lengthened and equipped with a controllable atmosphere device, which will greatly increase the heating rate. Investment cost of equipment

At the same time, none of the traditional heating methods (including the above three methods) can precisely control the differential heating of thin steel plates.

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