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Preparation method particularly suitable for cold-bending plastic formation of aluminum alloy extrusion member

A plastic forming, aluminum alloy technology, applied in the field of cold bending forming process, can solve the problem of neglecting aluminum alloy, and achieve the effect of overcoming the change of wall thickness and improving the mechanical properties of the alloy

Active Publication Date: 2014-01-08
天津锐新昌科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this technical solution is that it ignores the complexity of geometry, material science and physical metallurgy in the aluminum alloy cold-formation process, making cold-formation an empirically difficult process. strong application technology

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  • Preparation method particularly suitable for cold-bending plastic formation of aluminum alloy extrusion member

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preparation example Construction

[0021] The preparation method of the aluminum alloy extruded member of the present invention comprises the following steps:

[0022] A. Alloy "ordered" design: Mg 2 The Si strengthening phase is controlled at a low mass fraction level of 0.8-0.9%, the content of Fe as a harmful element is limited, and the microalloying technology of adding Ti is applied, so that the extruded profile can obtain a fine-grain solid solution quenching structure with sufficient plastic reserve; the following Ingredient mass percentage composition,

[0023] Mg: 0.48 ~ 0.52; Si: 0.28 ~ 0.30; Fe≤0.15;

[0024] Mn ≤0.1 ; Cu ≤0.1 ; Ti ; 0.08~0.12

[0025] Zn ≤0.05; the rest is Al.

[0026] B. Extrusion process control: heat the aluminum alloy extruded round ingot that meets the above composition requirements to keep the extrusion die hole temperature above the alloy solid solution temperature of 510°C; Rapid cooling system, and adjust the cooling water flow and flow rate according to the identified ...

Embodiment 1

[0030] Now take 6063 aluminum alloy extruded components as an example to illustrate:

[0031] A. The chemical composition of 6063 aluminum alloy is Mg-0.50; Si-0.30; Fe-0.12; Ti-0.08; (mass percentage).

[0032] B. Extrusion on-line solid solution-quenching treatment: the temperature of the exit hole of the extrusion profile is 510-540°C, and the on-line quenching facilities for the extrusion profile include one or more sets of nozzles that can adjust the water flow rate or the gas / water mixing rate, It can make the extruded profile temperature decrease steadily and continuously. The extruded profile enters the quenching zone at a temperature above 440°C, and the minimum cooling rate is 85°C / min.

[0033] C. Cold-bending plastic forming: After solution quenching, the sawn aluminum alloy extruded components are subjected to cold-bending plastic forming after natural aging to a basically stable state. The distribution parameters of feed compression passes in the forming proces...

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Abstract

The invention discloses a preparation method particularly suitable for the cold-bending plastic formation of an aluminum alloy extrusion member. The method comprises the following steps of: selecting the following components of the alloy in percentage by mass: 0.48-0.52% of Mg, 0.28-0.30% of Si, less than or equal to 0.15% of Fe, less than or equal to 0.1% of Mn, less than or equal to 0.1% of Cu, 0.08-0.12% of Ti, less than or equal to 0.05% of Zn and the balance of Al; heating an aluminum alloy extrusion round ingot conforming to the requirements on components and extruding to obtain a uniform straight section of a solution hardened structure; performing cold-bending plastic formation of the straight bar; and performing artificial aging treatment on the member. The method disclosed by the invention has the beneficial effects that: all technological designs and technological parameters of heat treatment can meet the requirements on large-scale production; the bending accuracy of an individual member has reproducibility; and the method is particularly suitable for a hollow aluminum alloy extrusion member. The member effectively overcomes the technological defects caused by plastic instability or non-uniform plastic deformation of material; and subsequent deep processing of the member is facilitated.

Description

technical field [0001] The invention relates to a cold-bending forming process in the field of plastic processing, in particular to a method for preparing an aluminum alloy extruded member with a hollow structure, which is especially suitable for cold-bending plastic forming. Background technique [0002] As an environmentally friendly material with various shapes, aluminum alloy extruded profiles have been widely used in structural parts in many industries, for example, the curved "C-arm" components used in the field of medical equipment. One advantage of lower-density aluminum alloys compared to steel, while maintaining a rigid design, is that the wall thickness of the aluminum profile is three times that of the same steel profile, and thus improves cold-formability. Cold bending is a cold forming process, and its plastic deformation is obtained through the cold bending momentum transmitted by a set of driving wheels. The traditional process method only focuses on the des...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P17/00C22C21/08C22F1/05C22F1/047
Inventor 国占昌刘惠群
Owner 天津锐新昌科技股份有限公司