Novel method and device for preparing bulk nanometer aluminum-lithium alloy

A technology of mold and die, which is applied in the field of preparing bulk nano-aluminum-lithium alloys, can solve problems such as low work efficiency, and achieve the effects of reducing labor intensity and widening channel bending angle extrusion deformation

Inactive Publication Date: 2014-03-05
SHANDONG JIANZHU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional ECAP device can only perform single-pass extrusion, and it needs to manually switch between different passes and different paths, and the work efficiency is low.

Method used

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  • Novel method and device for preparing bulk nanometer aluminum-lithium alloy
  • Novel method and device for preparing bulk nanometer aluminum-lithium alloy
  • Novel method and device for preparing bulk nanometer aluminum-lithium alloy

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Experimental program
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Embodiment Construction

[0019] From figure 1 Shown mold assembly drawing of the present invention, figure 2 The prestressed combined die structure, image 3 The top view of the prestressed combined die and Figure 4 It can be seen from the design details of the extrusion channel in the left view of the prestressed combined die that the present invention mainly includes 1. Lower template 2. Guide pillar 3. Hexagon socket screw 4. Guide sleeve 5. Upper template 6. Punch fixed plate 7. Positioning cylindrical pin 8. Die backing plate 9. Hexagon socket screw 10. Punch 11. Die plate 12. Die press sleeve 13. Die 14. Pad 15. Die backing plate and other components. In the extrusion process, the materials used in the extrusion experiment are firstly cut by wire cutting, and then processed into a sample with a diameter of 10mm and a length of 40mm by cutting, and then put into a continuous ECAP B C The path extrusion die, the ECAP die design is different from the conventional cold extrusion die, the ECAP d...

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Abstract

The invention discloses a novel method and device for preparing a bulk nanometer aluminum-lithium alloy. The method and the device are characterized in that the mechanical properties of the aluminum-lithium alloy are improved by a severe plastic deformation process, and an adopted severe plastic deformation device is provided with a continuous-corner die passage, wherein corners of the passage sequentially rotate by 90 degrees to the next corners, so that equal-passage corner continuous extrusion in a Bc path can be realized; moreover, a structure obtained by the Bc extrusion of a test sample is uniform, and an equiaxed crystal structure can be quickly obtained; an inverted bell-shaped two-layer combined prestressed structure is adopted by a female die, so that a die material can be effectively utilized, and the bearing capacity of the die material can also be ensured. According to the method and the device, the female die can be effectively prevented from being cracked, the service life of the die is prolonged, the efficiency of experimental researches is improved, and time and money are saved.

Description

technical field [0001] The invention relates to a new method and device for preparing bulk nano-aluminum-lithium alloy, in particular to an improved ECAP process Bc path continuous extrusion device. Background technique [0002] Li is the lightest metal element in the world, its density is only 0.539 / cm 3 , every 1% Li added to aluminum can reduce the alloy density by 3%. The modulus of elasticity increased by 6%. Because aluminum-lithium alloy has low density, high specific strength, high specific rigidity, excellent low temperature performance, good corrosion resistance and excellent superplastic forming performance, it can reduce the weight of components by 15% by replacing conventional aluminum alloys. , Stiffness increased by 15% to 20%. Al-Li alloys are considered ideal structural materials in the aerospace industry. [0003] At present, aluminum-lithium alloys have been used or tried on military aircraft, civil airliners and helicopters, mainly for fuselage frames...

Claims

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Application Information

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IPC IPC(8): B21C25/02
Inventor 徐淑波刘婷景财年林晓娟黄丽丽郑伟
Owner SHANDONG JIANZHU UNIV
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