A method for controlling transverse roughness of high-strength aluminum alloy sheet

A technology of aluminum alloy sheet material and control method, which is applied in the field of transverse unevenness control of aluminum alloy sheet material, can solve problems such as the inability to achieve flatness of aluminum alloy sheet material, and achieve the effects of reducing deformation, improving deformation, and uniform thickness of cross section

Active Publication Date: 2022-05-10
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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  • A method for controlling transverse roughness of high-strength aluminum alloy sheet
  • A method for controlling transverse roughness of high-strength aluminum alloy sheet
  • A method for controlling transverse roughness of high-strength aluminum alloy sheet

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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 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 displacement setting range of the five rollers on the straightening machine is: 13.5~16.5mm; the displacement setting value range 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 plate rolls is shown in Table 1;

[0027] ...

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Abstract

A method for controlling the transverse roughness of a high-strength aluminum alloy plate relates to a technology for controlling the transverse roughness of the aluminum alloy plate, in order to solve the problem that the straightness of the existing aluminum alloy plate cannot meet the requirements for application to specific wing panels. The invention controls the direction and size of the bending force of the rolling mill during the plate rolling process, performs roll straightening on the hot-rolled plate before the plate solid solution, and controls the amount of quenching water during the cooling process after the solid solution, so as to make the stress distribution of the quenched plate uniform and reduce the stress of the quenched plate. Quenching deformation, and optimize the quenching parameters according to the test results of the residual stress of the plate after quenching, so as to achieve the balanced control of the quenching stress of the plate, and properly pass the supporting force of the crossbeam of the stretching machine during the stretching process of the plate to improve the transverse flatness of the plate after stretching. Straightness. The beneficial effect is that the transverse unevenness of the plate not only satisfies the ANSI H35.2 standard, but also satisfies the requirements of parts processing and manufacturing.

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 Patents(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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