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
CN101898205AActive Publication Date: 2010-12-01常州苏晶电子材料有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
常州苏晶电子材料有限公司
Publication Date
2010-12-01

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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.
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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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