Extrusion method of hollow aluminum sections

A technology of hollow aluminum profile and extrusion method, which is applied in the field of aluminum profile manufacturing, can solve the problems that the mechanical properties of the product cannot be guaranteed, the metallurgical structure cannot be obtained, and the surface quality is reduced, so as to facilitate extrusion operation and yield The effect of large stress and deformation

Active Publication Date: 2015-02-04
FUJIAN MINFA ALUMINUM
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

If the temperature is too high, the surface quality of the material will decrease and a coarse structure will be formed; if the temperature is too low, the metallurgical structure in a solid solution state cannot be obtained, and the mechanical properties of the product cannot be guaranteed.

Method used

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Embodiment Construction

[0014] The present invention will be further described in conjunction with specific embodiments.

[0015] This embodiment provides a method for extrusion of a hollow aluminum profile, comprising the following steps:

[0016] Step 1: Heating the aluminum ingot to reduce the yield stress to achieve a large amount of deformation, using segmented heating, 0 to 1 hour, the heating temperature is 535 ° C, 1 to 2 hours, the heating temperature is 542.5 ° C, 2 Hours later, the heating temperature was 547.5°C, and the heating time was 3.5 hours;

[0017] Step 2, the aluminum ingot is kept standing for heat preservation for 43 minutes, and after standing for heat preservation, it is naturally cooled, and the cooling temperature is 3 minutes;

[0018] Step 3, heating the extrusion barrel, the heating temperature is 460°C;

[0019] Step 4: put the aluminum ingot that has been kept still and heat-preserved into the extrusion machine for extrusion, and gradually reduce the temperature of ...

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Abstract

The invention relates to an extrusion method of hollow aluminum sections with good performances and good mechanical performances. The method comprises the following steps: 1, heating aluminum ingots to 530-550DEG C for 3-3.5h to decrease the yield stress in order to realize large deflection; 2, carrying out standing heat insulation on the aluminum ingots for 42-43min; 3, heating an extrusion cylinder to 455-460DEG C; 4, putting the standing heat insulated aluminum ingots in an extrusion machine, extruding, and decreasing the temperature of the extrusion cylinder in the extrusion process to make the temperature of the extrusion cylinder smoothly decrease by 10-12DEG C after the extrusion; 5, arranging a heating ring outside the outlet of the extrusion machine, allowing the obtained extruded hollow aluminum sections to go through the heating ring, and allowing the heating temperature of the heating ring to reach 505-515DEG C; and 6, blanking the aluminum sections at the extrusion position, and quenching the obtained aluminum sections.

Description

technical field [0001] The invention relates to the technical field of aluminum profile manufacture, in particular to a hollow aluminum profile extrusion method. Background technique [0002] At present, in aluminum and aluminum alloy semi-finished products, extrusion is one of the main forming processes, and extrusion products account for 1 / 3 of all semi-finished products, especially in the production of building profiles. When extruding 6061 and 6063 alloys, in order to ensure the effect of extrusion heat treatment, high temperature extrusion should be used. In order to make all the silicon and magnesium in the alloy dissolve in the aluminum, the outlet temperature of the extruded material should be strictly controlled. If the temperature is too high, the surface quality of the material will decrease and a coarse structure will be formed; if the temperature is too low, the metallurgical structure in a solid solution state cannot be obtained, and the mechanical properties ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/02B21C31/00B21C29/00B21C29/02
Inventor 黄长远张宇
Owner FUJIAN MINFA ALUMINUM
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