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Transverse unflatness control method for high-strength aluminum alloy plate

A technology of an aluminum alloy sheet and a control method, which is applied in the field of lateral unevenness control of the aluminum alloy sheet, can solve the problems such as the unattainable flatness of the aluminum alloy sheet, reduce deformation, meet the processing and manufacturing requirements of parts, and reduce cooling deformation Effect

Active Publication Date: 2020-08-14
NORTHEAST LIGHT ALLOY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the flatness of the existing aluminum alloy sheet cannot meet the requirements for application to specific wing panels, and proposes a method for controlling the transverse roughness of the high-strength aluminum alloy sheet

Method used

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  • Transverse unflatness control method for high-strength aluminum alloy plate
  • Transverse unflatness control method for high-strength aluminum alloy plate
  • Transverse unflatness control method for high-strength aluminum alloy plate

Examples

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specific Embodiment approach 1

[0014] Specific implementation mode one: combine figure 1 and figure 2 To illustrate this embodiment, a method for controlling transverse roughness of a high-strength aluminum alloy sheet described in this embodiment is characterized in that the method for controlling transverse roughness includes the following steps:

[0015] Step 1. Si≤0.10%, Fe≤0.15%, Cu: 2.0%-2.6%, Mn≤0.10%, Mg: 1.8%-2.3%, Cr≤0.04%, Zn: 7.6%- 8.4%, Ti≤0.06%, Zr: 0.08%~0.18% and the balance is Al, weigh the cathode copper, zinc ingot, primary magnesium ingot, aluminum-titanium master alloy, aluminum-zirconium master alloy and aluminum ingot, and then add it to the dry Melted in a melting furnace, then cast into ingots with specifications of 420×1320×2000mm, 420×1620×2500mm or 450×1880×2100mm, and then homogenized annealing, face milling and sawing to obtain finished plate ingots ;

[0016] Step 2. Put the finished plate ingot obtained in step 1 into a resistance heating furnace, heat it to 360-420° C., ...

specific Embodiment approach 2

[0023] Specific embodiment 2: This embodiment is to further limit the method for controlling the transverse roughness of a high-strength aluminum alloy sheet described in specific embodiment 1. In this embodiment, in step 2, when the finished plate ingot is hot-rolled , the direction of the bending force is positive, the size is 2700 ~ 3000KN.

[0024] In this embodiment, by adjusting the direction of the bending force to be positive and the magnitude of the force to be 2700-3000KN, the subtle thickness difference in the cross-section of the plate is finely controlled to ensure that the thermal deformation of the entire transverse end surface of the plate is uniform, and to reduce the temperature of the hot-rolled plate. deformation after cooling.

specific Embodiment approach 3

[0025] Specific embodiment 3: This embodiment is to further limit the method for controlling the transverse roughness of a high-strength aluminum alloy sheet described in specific embodiment 1. In this embodiment, in step 3, the set value of the displacement of a roll on the straightening machine The range is: 17.0~25.0mm; the displacement setting range of the second roller on the straightening machine is: 10.0~23.0mm; the displacement setting value range of the three rollers on the straightening machine is: 10.0~20.5mm; the displacement setting of the four rollers on the straightening machine The value range is: 13.5~16.5mm; the range of the displacement setting value of the five rollers on the straightening machine is: 13.5~16.5mm; the setting value range of the displacement setting value of the six rollers on the straightening machine is: 17.5~25.5mm.

[0026] In this embodiment, the displacement setting range of the upper roll of the straightening machine for hot-rolled pla...

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Abstract

The invention discloses a transverse unflatness control method for a high-strength aluminum alloy plate, relates to a transverse unflatness control technology for the aluminum alloy plate, and aims atsolving a problem that the flatness of an existing aluminum alloy plate cannot meet the requirements for a specific wing wall plate. According to the method, the direction and the size of the roll bending force of a rolling mill are controlled in a plate rolling process, a hot rolled steel plate is subjected to roll straightening before solid solution of the plate and the quenching water amount is controlled in a cooling process after the solid solution, so that the stress distribution of a quenched plate is uniform, and the quenching deformation is reduced; and quenching parameters are optimized through a test result of residual stress of the quenched plate, so that the balance control of the quenching stress of the plate is achieved and the transverse flatness after stretching of the plate is appropriately improved by the effect of the supporting force of a beam of a stretcher in a stretching process of the plate. The method has the advantages that the transverse unflatness of the plate meets an ANSI H35.2 standard, and the requirements for manufacturing of parts are also met.

Description

technical field [0001] The invention relates to a technology for controlling transverse roughness of an aluminum alloy plate. Background technique [0002] Al-Zn-Mg-Cu alloy is a typical high-strength alloy in aluminum alloys, which can be strengthened by heat treatment, and has the advantages of high strength, high toughness, good corrosion resistance, high specific strength, and specific stiffness; the alloy in different heat treatment states Plates are widely used in the aerospace field as the main structural material; and the width of aluminum alloy plates that have been installed and applied is basically below 2000mm, and the 2500mm ultra-wide plates are less, mainly because the flatness of the plates is the key to the plate application process. Among the key indicators, there are often many large-scale and ultra-wide plates whose flatness meets the material standard specifications but does not meet the part processing conditions and cannot be installed and applied, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/03B21C37/02C22F1/053
CPCC22C21/10C22C1/026C22C1/03B21C37/02C22F1/002C22F1/053
Inventor 李红萍王凤春章骏吕新宇王大伟王旭任伟才王洪伍金梅张祥斌吴沂哲于莉莉韩颖左德运藏家吉
Owner NORTHEAST LIGHT ALLOY CO LTD
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