Mg-Al-La/Al laminated composite and method for manufacturing same

A composite material and lamination technology, applied in chemical instruments and methods, layered products, metal layered products, etc., can solve the problems of inability to meet the requirements of comprehensive mechanical properties of materials, unfavorable diffusion welding joints, etc., and is conducive to large-scale promotion. and application, good material coordination deformation ability, simple process effect

Inactive Publication Date: 2013-12-25
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the analysis shows that there is a certain diffusion cavity between the diffusion layer on the side of the interface aluminum plate and the middle diffusion layer, which is not conducive to obtaining a diffusion welded joint with excellent joint performance, and cannot meet the requirements of various complex environments for the comprehensive mechanical properties of materials.

Method used

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  • Mg-Al-La/Al laminated composite and method for manufacturing same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Mg-Al-La alloy smelting: the chemical composition (mass percentage) of the alloy is: 8%La, 6%Al, 8%Li, the total amount of impurity elements Fe, Cu, Ni, Si is less than 0.03%, the balance for Mg.

[0028] The melting and casting process for preparing the alloy is as follows: firstly weigh the materials according to the proportion, put the Mg, Al, Li, Mg-30% La master alloy into the crucible to prepare for melting, then vacuumize the melting furnace until the vacuum degree reaches 4Pa, and then fill into argon protective gas. After heating the smelting furnace, keep it warm for 37 minutes. When the alloy in the crucible is fully melted, cast it with a cooling rate of 6.0°C / s. The resulting castings were homogenized at 350°C for 10 hours and then air-cooled.

[0029] (2) Sample cutting: the Mg-Al-La alloy and commercial pure aluminum casted in the previous step were cut into rectangular slices with a thickness of 2.5 mm, a length and a width of 40 mm and 50 mm, respe...

Embodiment 2

[0035] (1) Mg-Al-La alloy smelting: the chemical composition (mass percentage) of the alloy is: 4%La, 3%Al, 4%Li, the total amount of impurity elements Fe, Cu, Ni, Si is less than 0.03%, and the remaining The amount is Mg.

[0036] The melting and casting process for preparing the alloy is as follows: firstly weigh the materials according to the proportion, put the Mg, Al, Li, Mg-30% La master alloy into the crucible to prepare for melting, then vacuumize the melting furnace until the vacuum degree reaches 2Pa, and then fill into argon protective gas. After preheating the melting furnace, keep it warm for 35 minutes. When the alloy in the crucible is fully melted, cast it with a cooling rate of 7.0°C / s. The resulting castings were homogenized at 400°C for 8 hours and then air-cooled.

[0037](2) Cutting of samples: The Mg-Al-La alloy and commercial pure aluminum cast in the previous step were cut into rectangular slices with a thickness of 2 mm, a length and a width of 60 mm...

Embodiment 3

[0043] (1) Mg-Al-La alloy smelting: the chemical composition (mass percentage) of the alloy is: 8%La, 6%Al, 4%Li, the total amount of impurity elements Fe, Cu, Ni, Si is less than 0.03%, and the remaining The amount is Mg.

[0044] The melting and casting process for preparing the alloy is as follows: firstly weigh the materials according to the proportion, put the Mg, Al, Li, Mg-30% La master alloy into the crucible to prepare for melting, then vacuumize the melting furnace until the vacuum degree reaches 2Pa, and then fill into argon protective gas. After preheating the melting furnace, keep it warm for 45 minutes. When the alloy in the crucible is fully melted, cast it. The cooling rate was 8°C / s, and the obtained casting was homogenized at 450°C for 11 hours, and then air-cooled.

[0045] (2) Cutting of samples: Cut the Mg-Al-La alloy cast in the previous step and commercial pure aluminum into circular slices with a thickness of 2.3mm and a radius of 3mm by wire cutting....

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Abstract

The invention provides an Mg-Al-La / Al laminated composite and a method for manufacturing the same. The method includes cutting Mg-Al-La alloy and pure Al into slices; processing the surfaces of the Mg-Al-La slice and the surfaces of the Al slices and removing oil stains and oxides on the surfaces of the slices; laminating the Mg-Al-La slice and the Al slices to form a lamination and then placing the lamination in a vacuum hot-pressing sintering furnace to composite the lamination by a gradient heating process to obtain the Mg-Al-La / Al laminated composite. The Mg-Al-La slice is arranged in the middle of the lamination, and the Al slices are arranged on the upper side and the lower side of the Mg-Al-La slice. The Mg-Al-La / Al laminated composite and the method have the unique advantages that an excellent interface bonding mode is a mixed bonding mode including a mechanical bonding mode, a dissolution and wetting bonding mode and a reaction bonding mode; La elements and Al elements react with one another at interfaces to generate Al<4>La, and the Mg-Al-La slice and the Al slices are connected with one another by the Al<4>La which can realize effects of nails, so that the interfaces can be bonded firmly; the method is simple in process, convenient to operate and favorable for large-scale popularization and application.

Description

technical field [0001] The invention relates to a magnesium-based metal material and a preparation method thereof, in particular to a Mg-Al-La / Al laminated composite material and a preparation method thereof. Background technique [0002] As a rapidly emerging new green engineering structural material, Mg has broad application prospects in automobiles, electronic communications, aerospace, aviation, etc. However, the absolute strength of magnesium is low, and its heat resistance and corrosion resistance are poor, which has become a bottleneck restricting the development of magnesium alloys. At present, Al still occupies a dominant position in light metal structural materials. If Mg and Al dissimilar materials are connected to obtain a stable and reliable joint with good interface bonding, this can maximize the use of the respective advantages of the materials to meet the structure-to-performance requirements. Requirements provide broad prospects for the further development ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/02B22F3/14B32B15/01
Inventor 张密林史红岩张景怀冷哲江风春王国伟
Owner HARBIN ENG UNIV
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