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A preparation method of high-strength aluminum alloy hollow guide rail profile

A hollow guide rail and aluminum alloy technology, applied in the field of aluminum alloy materials, can solve problems such as bending, twisting, difficult shaping and straightening

Active Publication Date: 2021-06-29
福建祥鑫股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the off-line quenching process, there will be bending and twisting problems, and it is not easy to straighten after twisting

Method used

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  • A preparation method of high-strength aluminum alloy hollow guide rail profile
  • A preparation method of high-strength aluminum alloy hollow guide rail profile
  • A preparation method of high-strength aluminum alloy hollow guide rail profile

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preparation example Construction

[0023] The invention provides a method for preparing a high-strength aluminum alloy hollow rail profile, comprising:

[0024] Aluminum alloy high-strength hollow rail profiles obtained through ingot heating, extrusion, on-line quenching, stretching, shaping, aging and other processes;

[0025] The temperature of the ingot is 440°C-470°C; the extrusion speed is 2.2-2.9m / min.

[0026] In the present invention, the aluminum alloy is first heated through ingot casting. The ingot casting described in the present invention is an ingot heating process well known to those skilled in the art. Preferably, the ingot casting is carried out in an induction heating furnace. The temperature at the end is high and the temperature at the end is low. The ingot heating temperature is 455°C-470°C at the head end of the ingot, and 440°C-455°C at the tail end of the ingot; °C-450 °C; the most preferred temperature is 462 °C at the head end of the ingot and 448 °C at the tail end of the ingot.

...

Embodiment 1

[0038] The 7A19 aluminum alloy is heated for ingot casting, adopting the gradient heating method, the ingot heating temperature is 470°C at the head end of the ingot, and the temperature at the tail end of the ingot is 455°C; the mold temperature is 460°C; Extruded on a 366mm cylinder, the temperature of the extrusion cylinder is 450°C, the extrusion speed is 2.5m / min, the outlet temperature of the extruded profile is 500°C; online wind and mist cooling, the cooling rate is 180°C / s, and the on-line process is carried out after quenching. Stretching, using special pads for stretching, controlling the stretching rate to 1.2%, and then aging at 138°C for 16 hours to obtain aluminum alloy guide rail profiles. The bending degree and twisting degree of the high-strength aluminum alloy hollow guide rail profile product prepared in this embodiment are effectively controlled.

Embodiment 2

[0040] The 7A19 aluminum alloy is heated for ingot casting, adopting the gradient heating method, the ingot heating temperature is 470°C at the head end of the ingot, and the temperature at the tail end of the ingot is 455°C; the mold temperature is 460°C; Extruded on a 366mm barrel, the temperature of the extrusion barrel is 450°C, the extrusion speed is 1.0m / min, the outlet temperature of the extruded profile is 465°C; online wind and mist cooling, the cooling rate is 180°C / s, and the on-line process is carried out after quenching Stretching, using special pads for stretching, controlling the stretching rate to 1.2%, and then aging at 138°C for 16 hours to obtain aluminum alloy guide rail profiles. The bending degree and twisting degree of the high-strength aluminum alloy hollow guide rail profile product prepared in this embodiment are effectively controlled.

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Abstract

The invention discloses a method for preparing a high-strength aluminum alloy hollow guide rail profile, comprising: heating the aluminum alloy raw material for ingot casting, adopting a gradient heating method, the ingot heating temperature is 455°C-470°C at the head end of the ingot, and the ingot The tail temperature is 440°C-455°C; the mold temperature is 460°C-480°C; after the ingot is cast, it is extruded on a 350mm-380mm barrel of a 5000t extruder, the temperature of the extrusion barrel is 440°C-460°C, and the extrusion speed 2.1‑2.9m / min, slow upward pressure, the extrusion speed cannot exceed 0.3mm / s when the pressure is broken; after extrusion, use a tractor to stretch the profile to discharge; the profile is clamped by the tractor through the water tank, The outlet temperature of the extruded profile is 480-510°C, online air-mist cooling, the cooling rate is 160-190°C / s, after quenching, online stretching is carried out, and the stretching uses special pads to control the stretching rate 0.8%-1.5%, sawing the head and tail after stretching, and then aging at 120°C-150°C for 12h-24h to obtain aluminum alloy guide rail profiles.

Description

technical field [0001] The invention belongs to the field of aluminum alloy materials, and in particular relates to a preparation method of a high-strength aluminum alloy hollow guide rail profile. Background technique [0002] As a lightweight material, aluminum alloy is more and more valued by people, and it is more and more widely used. Aluminum alloy profiles are used for guide rail profiles. However, the simple U-shaped structure cannot meet the mechanical performance requirements in part of the guide rail structure, and needs to be changed to a trapezoid; at the same time, the traditional 6-series aluminum alloy guide rail cannot meet the needs of the guide rail due to its low strength. [0003] Since the hollow rail profile has a hollow structure, the wall thickness is uneven at the same time. During the off-line quenching process, there will be problems of bending and twisting, and it is not easy to shape and straighten after twisting. [0004] Therefore, there is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C31/00B21C35/02B21C29/00B21C27/00C22F1/047
CPCB21C27/00B21C29/003B21C31/00B21C35/02C22F1/002C22F1/047
Inventor 张建雷黄铁兴黄桢荣刘金霞刘馥兵
Owner 福建祥鑫股份有限公司
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