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Method for manufacturing Mg-Li/Al material by means of accumulative roll-bonding

A technology of cumulative stacking and sheet rolling, applied in metal rolling, profile control, temperature control, etc., can solve the problem of not being able to improve corrosion resistance at the same time, and achieve the effect of high strength, good corrosion resistance, and improved alloy strength

Inactive Publication Date: 2017-03-15
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above two methods can improve the strength of Mg-Li alloy to a certain extent, they cannot simultaneously improve its corrosion resistance.

Method used

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  • Method for manufacturing Mg-Li/Al material by means of accumulative roll-bonding
  • Method for manufacturing Mg-Li/Al material by means of accumulative roll-bonding

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Embodiment 1

[0024] The chemical composition (mass percentage) of the magnesium-lithium alloy is: Li: 8.3%, Al: 3.2%, Zn: 1.3%, the balance is Mg, and the aluminum is 1070 pure aluminum.

[0025] Cumulative rolling of magnesium-lithium alloy sheets and aluminum sheets:

[0026] a) Cut the magnesium-lithium alloy plate and the aluminum plate to be accumulated and rolled into two pieces of equal size,

[0027] b) Clean and polish the surface of the plate.

[0028] c) Superimpose the treated magnesium-lithium alloy plate on the aluminum plate and punch holes in the four corners and fix them with rivets.

[0029] d) Carry out the first accumulative stack rolling on the fixed plate, the rolling reduction rate is 50%, the rolling temperature is 400°C, and the holding time before rolling is 15min.

[0030] d) Carry out the 2nd to 6th cumulative stack rolling with the same method, and the rolling parameters remain unchanged.

[0031] A Mg-Li / Al layered composite plate with both high strength an...

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Abstract

The invention provides a method for manufacturing an Mg-Li / Al material by means of accumulative roll-bonding. The method comprises the steps of: a) cutting to-be-accumulatively roll-bonded magnesium lithium alloy panel and aluminum alloy panel into pieces which are equal in dimension; b) cleaning the surfaces and then polishing the pieces; c) perforating the obtained magnesium lithium alloy panel and the aluminum alloy panel in the step b) at four corners and fixing the same with rivets; d) rolling the Mg-Li / Al alloy panel obtained in the step b), wherein the rolling temperature is 400 DEG C, the reduction rate is 50%, and the temperature before rolling is maintained for 10-15min; and e) performing ply rolling 4-6 times according to the steps a)-d). The Mg-Li / Al laminar composite board is prepared by virtue of an accumulative roll-bonding process, so that the corrosion resistance of the magnesium lithium alloy is improved while the strength of the magnesium lithium alloy is improved. The Mg-Li / Al laminar composite board which is high in strength and corrosion resistance is finally obtained. The tensile strength of the board at the room temperature reaches 270-290MPa, and the ductility of the board reaches 7.1-9.7%.

Description

technical field [0001] The invention relates to a method for preparing a high-strength and high-corrosion-resistant Mg-Li / Al composite plate. Background technique [0002] Magnesium-lithium alloy is the alloy material with the smallest density so far, also known as ultra-light alloy. It has high specific strength, specific stiffness, good high and low temperature toughness, excellent damping and shock absorption, electromagnetic shielding and machining performance, etc. It is used in aerospace, marine, automobile, electronics and other fields. [0003] However, due to the disadvantages of low strength and poor corrosion resistance, magnesium-lithium alloys are not widely used in various fields. Therefore, the development of magnesium-lithium alloys with better corrosion resistance and higher strength, the research of new production processes, and the improvement of the product quality of the alloy play a vital role in the rapid development of the national industry. [0004...

Claims

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Application Information

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IPC IPC(8): B21B1/38B21B3/00B21B37/74B21B37/28
CPCB21B1/38B21B3/00B21B37/28B21B37/74B21B2001/386B21B2003/001
Inventor 巫瑞智马旭东王天资杨金亮侯乐干张密林
Owner HARBIN ENG UNIV
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