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Shaping method of aluminium alloy section

A kind of technology of aluminum alloy and aluminum alloy plate, which is applied in the field of forming of aluminum alloy material

Inactive Publication Date: 2007-02-21
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is no effective and practical forming method for 6000-series Al alloy materials that have been age-hardened at room temperature. Only design changes such as forming shapes, or sacrificing efficiency factors such as engineering or time can be used to alleviate the problem. Forming processing conditions, which is the current reality

Method used

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  • Shaping method of aluminium alloy section

Examples

Experimental program
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Effect test

Embodiment 1

[0085] Next, examples of the present invention will be described. After the room-temperature-aged Al alloy sheet was subjected to the recovery treatment of the present invention, its press formability and hemming type were evaluated.

[0086] That is, the 6000-series Al alloy sheets with the Si-excess composition of A shown in Table 1 were left at room temperature for 4 months, and subjected to room temperature aging. The tensile test resistance of the Al alloy plate aged at this room temperature is compared with the As0.2% yield point of 128MPa and 30% of As elongation of the Al alloy plate after quenching and tempering treatment (just finished). The 0.2% yield point is 163 MPa, the △ yield point increases by 35 MPa, the elongation after aging is 25%, and the △ elongation decreases by 5%. In addition, the average grain size measured by the above-mentioned method for measuring the grain size of the Al alloy sheet after room temperature aging was 30 μm.

[0087] The tensile t...

Embodiment 2

[0100] Next, as an automobile outer panel, the same Al alloy sheet as in Example 1 was press-formed, the sheet was left to age at room temperature, and then hemming was simulated to evaluate the flat hemming workability. These results are shown in Table 3.

[0101] Stamping is carried out as follows. Cut a number of square test plates (plank thick plates) with a side length of 500mm from the Al alloy plate that has just been manufactured and has not been subjected to room temperature aging. Using a mold with a bead, machine Stamping, stretching is formed into a box-shaped panel with a high square cylindrical extension with a side length of 300 mm and a height of 30 mm in the center, and a flat flange edge (width 30 mm) around the extension. The wrinkle suppressing force was 49kN, the lubricating oil was general antirust oil, and the forming speed was 20mm / min under the same conditions.

[0102] This box-shaped panel is subjected to room temperature aging treatment after being...

Embodiment 3

[0116] Next, bending workability after the recovery treatment of the present invention was evaluated for extruded hollow profiles of Al alloys aged at room temperature.

[0117]Specifically, the aluminum alloy billet of each 6000-series component composition shown in Table 1 above was melted by DC casting, subjected to homogenization heat treatment at 480°C×4hr, and extruded at an extrusion temperature of 480°C. , After extrusion, it is directly quenched by water cooling on-line respectively. Next, these extruded materials were jointly subjected to an aging treatment at 190° C. for 3 hours. The extrusion speed was 5 m / min, the extrusion ratio was 61, and the cooling rate during direct quenching was 350° C. / sec.

[0118] This extruded hollow shape has a uniform rectangular (mouth-shaped) section in the longitudinal direction. The long side of the rectangular section is 100mm, the short side is 70mm, and the thickness is 1.5mm.

[0119] The extruded hollow shape was aged for 4...

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Abstract

This invention provides a method for molding aluminum alloy. The method comprises: applying more than 1% processing tension on 6000 series aluminum alloy, and heating at 50-150 deg.C for aging and hardening reclamation treatment. Since the moldability of aluminum alloy is reclaimed, thus the aluminum alloy can be molded at ambient conditions. By using this method, the moldability of 6000 series aluminum alloy after aging and hardening at room temperature can be reclaimed.

Description

technical field [0001] The present invention relates to a method for forming an aluminum alloy material (hereinafter, aluminum is abbreviated as Al) for recovering the formability of a 6000-series aluminum alloy material whose formability has been reduced by room temperature age hardening. Background technique [0002] Al alloys with excellent formability and heat hardenability have been used conventionally for parts and parts of vehicles, ships, airplanes, and locomotives, machinery, electrical products, buildings, structures, optical equipment, and appliances. material. [0003] In particular, in the field of vehicle bodies of transportation means such as automobiles, in recent years, due to global environmental protection problems caused by exhaust gas emissions and the like, improvements in fuel consumption through weight reduction have been desired. Therefore, for the body of an automobile, the application of lighter Al alloy materials instead of conventionally used st...

Claims

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Application Information

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IPC IPC(8): C21D8/00B21D1/10B21D22/00
Inventor 松元和秀稻叶隆安永繁信
Owner KOBE STEEL LTD
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