Method for preparing magnesium alloy strip blank cogged by flat extruding cylinder

A technology of flat extrusion barrel and magnesium alloy plate, which is applied in the direction of metal extrusion forming tools, metal extrusion, metal processing equipment, etc., can solve the problem of uneven deformation of magnesium alloy materials, unfavorable slab processing and production, and magnesium alloy microstructure Inhomogeneity and other problems, to achieve the effect of excellent anisotropy performance, uniform deformation, uniform flow and deformation

Inactive Publication Date: 2008-10-08
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large difference between the circular cross-section shape of the magnesium alloy round ingot 7 and the rectangular cross-section shape of the magnesium alloy strip billet 8, the magnesium alloy round ingot changes from a round ingot to a strip billet with a rectangular cross-section during the forming process. The width direction of the slab is likely to cause uneven deformation of the magnesium alloy material, resulting in small deformation at the end of the magnesium alloy slab, large deformation at the middle, and uneven microstructure of the magnesium alloy in the width direction of the slab, with significant anisotropy. It is not conducive to the subsequent processing and production of slabs

Method used

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  • Method for preparing magnesium alloy strip blank cogged by flat extruding cylinder
  • Method for preparing magnesium alloy strip blank cogged by flat extruding cylinder
  • Method for preparing magnesium alloy strip blank cogged by flat extruding cylinder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Centering of the extrusion device: screw the extrusion pad 1a to the extrusion rod 1, adjust the position of the flat extrusion cylinder and the extrusion rod, so that the center line of the extrusion rod 1, the center line of the flat extrusion cylinder and the strip The center line of the mold 3 is on the same straight line. During the extrusion process, the extrusion rod is located in the center of the inner cavity of the flat extrusion cylinder without damaging the inner cavity wall. At the same time, it can prevent the flat ingot from moving around when it moves forward. Ensure uniform deformation of the slab during extrusion.

[0040] Processing of magnesium alloy flat ingot: AZ31 magnesium alloy material is used to prepare a magnesium alloy extrusion billet with a length of 100mm, a width of 93mm and a thickness of 55mm through a semi-continuous casting process. After cutting the head and tail of the magnesium alloy extrusion billet, machining obtains a magnesium...

Embodiment 2

[0046] Centering of the extrusion device: screw the extrusion pad 1a to the extrusion rod 1, adjust the position of the flat extrusion cylinder and the extrusion rod, so that the center line of the extrusion rod 1, the center line of the flat extrusion cylinder and the strip The center line of the mold 3 is on the same straight line. During the extrusion process, the extrusion rod is located in the center of the inner cavity of the flat extrusion cylinder without damaging the inner cavity wall. At the same time, it can prevent the flat ingot from moving around when it moves forward. Ensure uniform deformation of the slab during extrusion.

[0047] Processing of magnesium alloy flat ingot: AZ31 magnesium alloy material is used to prepare a magnesium alloy extrusion billet with a length of 100mm, a width of 165mm and a thickness of 90mm by a semi-continuous casting process, and the magnesium alloy extrusion billet is cut head, tail and milled Finally, a magnesium alloy flat ingo...

Embodiment 3

[0053] Centering of the extrusion device: screw the extrusion pad 1a to the extrusion rod 1, adjust the position of the flat extrusion cylinder and the extrusion rod, so that the center line of the extrusion rod 1, the center line of the flat extrusion cylinder and the strip The center line of the mold 3 is on the same straight line. During the extrusion process, the extrusion rod is located in the center of the inner cavity of the flat extrusion cylinder without damaging the inner cavity wall. At the same time, it can prevent the flat ingot from moving around when it moves forward. Ensure uniform deformation of the slab during extrusion.

[0054] Processing of magnesium alloy flat ingot: AZ31 magnesium alloy material is used to prepare a magnesium alloy extrusion billet with a length of 2000mm, a width of 265mm and a thickness of 30mm through a semi-continuous casting process. After cutting the head, tail, and skin milling of the magnesium alloy extrusion billet, a magnesium ...

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Abstract

The invention relates to a preparation method for a magnesium alloy sheet strip plate for the cogging of a flat extruding cylinder; the preparation method includes the following steps: the position of the flat extruding cylinder and an extruding rod is adjusted to lead the central line of the extruding rod, the central line of the flat extruding cylinder and the central line of a die for a slab band to be arranged on the same line; an original flat section ingot is uniformly processed for 12 to 24 hours under the temperature of 400 to 420 DEG C after being processed by machine and milled; after being uniformly processed, the flat section ingot of the magnesium alloy is heated to the temperature of 400 to 430 DEG C and heat is preserved; simultaneously, the flat extruding cylinder and the die for the slab band is heated to the temperature of 400 to 430 DEG C and the heat is preserved for 6 hours; the flat section ingot of the magnesium alloy of the steps is fed into a channel of the flat extruding cylinder and enters the die for the slab band to extrude by the channel with a flat hole with the extruding speed of 1.5m / min to 5m / min, thus obtaining the strip plate of the magnesium alloy sheet with a rectangle section. The invention adopts an extruding device with a flat extruding cylinder; the processing method can be used for leading the deformation of magnesium alloy material to be uniform during the extruding process to obtain the magnesium alloy sheet strip plate with excellent anisotropy properties of a tissue.

Description

technical field [0001] The invention relates to the processing of a magnesium alloy strip blank, in particular to a preparation method of a magnesium alloy strip blank which is opened by a flat extrusion cylinder. Background technique [0002] Magnesium has a small specific gravity and has the characteristics of excellent vibration and noise reduction performance and strong protection against electromagnetic wave interference. In order to meet the urgent requirements of weight reduction, energy saving, and environmental protection, magnesium alloys have been widely used in many fields such as automobiles, electronic communications, and aerospace. Among them, the application of magnesium alloy plates and strips accounts for a large proportion, and the potential application market is broad. At present, the processing of magnesium alloy plates and strips is usually completed by hot rolling billet rolling process, twin-roll continuous casting and rolling process and extrusion bi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/02B21C25/00B21C25/02B21C29/00
Inventor 蒋斌黄光杰丁培道王健
Owner CHONGQING UNIV
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