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Extrusion mold for high-strength magnesium alloy and magnesium alloy extrusion method

An extrusion die and extrusion method technology, applied in the field of alloy forging and extrusion, can solve the problems of complicated process, damage to the shape of the alloy, and low degree of refinement, and achieve the effects of simple operation, no damage to the shape of the material, and reduced segregation.

Active Publication Date: 2019-01-04
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these two or three plastic deformation methods can refine the grains to a certain extent and strengthen the magnesium alloy, these three methods all have the disadvantages of cumbersome process, low degree of refinement, and damage to the shape of the alloy.

Method used

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  • Extrusion mold for high-strength magnesium alloy and magnesium alloy extrusion method
  • Extrusion mold for high-strength magnesium alloy and magnesium alloy extrusion method
  • Extrusion mold for high-strength magnesium alloy and magnesium alloy extrusion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] combine Figure 1-Figure 7 Shown, the extrusion die of a high-strength magnesium alloy disclosed in this embodiment includes a die punch 1, a heating device 2, a die sleeve 3, a rotatable inner mandrel 4 and an outer mandrel 5; the die sleeve 3 An external mandrel 5 is arranged inside, and a rotatable inner mandrel 4 is arranged inside the outer mandrel 5, and a magnesium alloy to be extruded is arranged inside the rotatable inner mandrel 4, and the upper end of the rotatable inner mandrel 4 is set There is a mold punch 1, and the upper end of the mold sleeve 3 is also provided with a heating device 2, and the heating device 2 supplies heat for the outer mandrel 5, the rotatable inner mandrel 4 and the magnesium alloy to be extruded respectively. 3 The lower end is also provided with a set of thermocouple temperature measuring devices, the thermocouple temperature measuring devices are connected to a set of temperature control system data, and the temperature control sy...

Embodiment 2

[0056] A magnesium alloy extrusion method for an extrusion die of a high-strength magnesium alloy, the method comprising the steps of:

[0057] The magnesium alloy blank is selected as Mg-4Sn-3Nd-1Ti. After solution treatment, the magnesium alloy blank is made into the required size by wire cutting, placed in the mold mandrel, and the mold punch is placed above the blank.

[0058] Set the parameters of the temperature control system and then turn on the switch of the heating device. In order to promote the temperature stability of the device and reduce heat loss; wrap a layer of asbestos on the surface of the mold for heat resistance.

[0059] Adjust the position of the inner core and the outer core of the mold.

[0060] A magnesium alloy billet with a diameter of 25 mm and a length of 135 mm is put into the rotatable inner mandrel 4 .

[0061] The heating device 2 is connected in the mold sleeve 3, and the rotatable internal mandrel 4 and the magnesium alloy blank added ther...

Embodiment 3

[0070] A magnesium alloy extrusion method for an extrusion die of a high-strength magnesium alloy, the method comprising the steps of:

[0071] The magnesium alloy blank is selected as Mg-4Sn-3Nd-1Ti. After solution treatment, the magnesium alloy blank is made into the required size by wire cutting, placed in the mold mandrel, and the mold punch is placed above the blank.

[0072] Set the parameters of the temperature control system and then turn on the switch of the heating device, in order to promote the temperature stability of the device and reduce heat loss. Wrap a layer of asbestos on the surface of the mold for heat resistance.

[0073] Adjust the position of the inner mold core and the outer mold core of the mold, and the outlet of the outer core mold is exactly the same as the opening of the inner core mold.

[0074] A magnesium alloy billet with a diameter of 25 mm and a length of 135 mm is put into the rotatable inner mandrel 4 .

[0075] The heating device 2 is c...

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Abstract

The invention relates to the technical field of forging extrusion of alloys, in particular to an extrusion mold of a high-strength magnesium alloy. The extrusion mold comprises a mold punch; an outercore die is arranged in a mold sleeve and internally provided with a rotatable inner core die, the to-be-extruded magnesium alloy is arranged in the rotatable inner core die, the mold punch is arranged at the upper end of the rotatable inner core die, and a heating device is further arranged at the upper end of the mold sleeve and supplies heat to the outer core die, the rotatable inner core die and the to-be-extruded magnesium alloy separately; a thermocouple temperature measuring device is also arranged at the lower end of the mold sleeve and is in data connection with a temperature controlsystem, and the temperature control system is electrically connected with the heating device. A superfine magnesium alloy material can be directly obtained, and the extrusion mold has the advantages that the operation is simple and the shape of the material is unlikely to be damaged; repeated extrusion can also be conducted, and the high-strength magnesium alloy can be obtained in a rolling process at a time.

Description

technical field [0001] The invention relates to the technical field of alloy forging and extrusion, in particular to a high-strength magnesium alloy extrusion die and a magnesium alloy extrusion method. Background technique [0002] Magnesium alloys belong to the close-packed hexagonal structure and have poor plasticity at room temperature. In recent years, the demand for magnesium alloys in machinery manufacturing, transportation, aerospace, and information industries has gradually increased. In order to solve the contradiction between the two, it is often necessary to Modification of magnesium alloys. As an important part of rare earth materials, the addition of Nd elements has the characteristics of enhancing the high temperature strength of magnesium alloys, reducing hot cracks of magnesium alloys, and enhancing the corrosion resistance of magnesium alloys. In addition, temperature has a great influence on the solid solubility of Nd element in magnesium alloys, and such...

Claims

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Application Information

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IPC IPC(8): B21C25/02B21C25/04B21C29/00B21C23/04C22C23/00
CPCB21C23/001B21C23/04B21C25/02B21C25/04B21C29/003C22C23/00
Inventor 于彦东颜泽华姚艺铭
Owner HARBIN UNIV OF SCI & TECH
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