Method for levelling metal plate with stress deformation by utilizing vacuum annealing

A technology of stress deformation and metal plate, which is applied in the field of annealing and leveling of metal plates with stress deformation, can solve the problems of low leveling accuracy and limited leveling effect, and achieve the advantages of simple equipment, shortened production cycle and reduced production cost Effect

Active Publication Date: 2010-12-01
常州苏晶电子材料有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Different from the current multi-roller leveling method (use the point and line mechanical contact between the metal plate and the roll to produce plastic deformation, and then achieve the purpose of leveling by the elastic recovery of the metal plate), the method of the pre

Method used

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  • Method for levelling metal plate with stress deformation by utilizing vacuum annealing
  • Method for levelling metal plate with stress deformation by utilizing vacuum annealing
  • Method for levelling metal plate with stress deformation by utilizing vacuum annealing

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[0020] Example

[0021] For a low carbon steel sheet with a thickness of 20 mm and a winding degree of 8 mm, the method of the present invention is used for leveling by vacuum annealing. The annealing conditions are three hours at 800°C.

[0022] Such as figure 2 , Place the low carbon steel plate 1 to be leveled in the fixture 2, set a sealed air bag 3 on the low carbon steel plate 1, and the elastic thin wall 4 of the air bag 3 contacts the low carbon steel plate 1 to be leveled. The air bag 3 is fastened with the low carbon steel plate 1 to be leveled with a clamp, and placed in the vacuum annealing furnace 8, vacuumed and heated for annealing. The gas in the air bag 3 will increase the temperature to make the elastic thin wall 4 The low carbon steel sheet 1 to be leveled is expanded, and the low carbon steel sheet 1 is leveled while being annealed.

[0023] The fixture 2 is as image 3 As shown, the upper cover plate 5 and the lower cover plate 6 are included. The lower cover ...

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Abstract

The invention discloses a method for levelling metal plate with stress deformation by utilizing vacuum annealing. The metal plate required to be levelled is placed in a fixture comprising an upper cover plate and a lower cover plate, a sealed air pocket is arranged on the metal plate, the elastic thin wall of the air pocket is contacted with the metal plate, the air pocket is fastened onto the metal plate required to be levelled, and the metal plate is placed into a vacuum annealing furnace, vacuumizing, heating and annealing are carried out, and levelling on the metal plate is carried out after annealing is finished. The method of the invention changes the levelling method from local deformation into global deformation while the metal plate is in uniform stress after yield stress is reduced, thus finishing levelling in one step and improving efficiency and accuracy of levelling; and meanwhile the method of the invention combines 'levelling' and 'annealing' processes, thus shortening production period and reducing production cost.

Description

technical field [0001] The invention relates to a processing technology for metal materials, in particular to a method for annealing and leveling stress-deformed metal plates. Background technique [0002] Stress-deformed metal sheets, such as rolled metal sheets, have problems of deformation and uneven plane due to residual stress inside the metal; moreover, there is the possibility of continuous deformation during subsequent machining. Therefore, metal sheets with stress deformation need two processes of "levelling" and "annealing" (sometimes, a second "levelling" and "levelling" should be done during the machining process), the purpose is to When machining metal sheets, the deformation of the metal material can be controlled to meet the machining accuracy requirements. More importantly, the treated metal sheet will be in a relatively stable state in terms of residual stress and organizational structure, and the equipment or parts made of the metal sheet will not change s...

Claims

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Application Information

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IPC IPC(8): B21D1/00
Inventor 范嘉苏
Owner 常州苏晶电子材料有限公司
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