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

A technology of uniform heating and differential temperature heating, applied in heat treatment equipment, heat treatment furnaces, furnaces, etc., can solve the problems of inability to accurately control differential temperature heating of thin steel plates, deformation of thin steel plates, and increased investment costs of heating equipment

Inactive Publication Date: 2012-03-14
刘丽辉
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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 proce

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

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Embodiment Construction

[0014] figure 1 It is a schematic diagram of the thin steel plate contact heating method. A pair of heating templates 101 made of heat-resistant steel placed in an isothermal heating device will clamp the heated steel plate 104 under the action of clamping force P. Compared with the heated steel plate 104, the heating template 101 has sufficient thickness and heat capacity, so its temperature fluctuation during the heating process can be ignored. The heating template 101 has a composite heat exchange surface composed of a high heat exchange area 102 and a low heat exchange area 103, and the heat exchange coefficient between the former and the steel plate to be heated is obviously higher than the latter. Therefore, the part of the heated steel plate 104 in contact with the high heat exchange zone 102 can be rapidly heated to the temperature close to the temperature of the heating template 101 itself, while at the same time, the part in contact with the low heat exchange zone 1...

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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...

Claims

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Application Information

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IPC IPC(8): C21D9/46C21D9/56
Inventor 刘伟杰刘丽辉
Owner 刘丽辉
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