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Method for manufacturing three-dimensional large-size aluminum-lithium alloy round ingot through spray forming

An aluminum-lithium alloy, spray forming technology, applied in the field of aluminum-lithium alloy, can solve the problems of long process, difficult aluminum-lithium alloy billet, difficult densification, etc., achieve dense forming, good process stability, and avoid segregation of alloy elements Effect

Active Publication Date: 2016-02-24
JIANGSU HAORAN SPRAY FORMING ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in addition to the shortcomings of powder metallurgy such as long process, easy oxidation of powder surface to introduce impurities, and difficulty in densification, large size is also a bottleneck that it cannot break through. It is difficult to use powder metallurgy to produce large-sized aluminum-lithium alloy ingots that meet the needs of aerospace.
[0012] In summary, it is almost impossible to produce three-dimensional large-scale aluminum-lithium alloy ingots that require integral components using ingot metallurgy and powder metallurgy.
There is no report on the production of industrial-scale aluminum-lithium alloys by spray forming technology

Method used

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  • Method for manufacturing three-dimensional large-size aluminum-lithium alloy round ingot through spray forming
  • Method for manufacturing three-dimensional large-size aluminum-lithium alloy round ingot through spray forming
  • Method for manufacturing three-dimensional large-size aluminum-lithium alloy round ingot through spray forming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: the production of 2195 aluminum-lithium alloy billets;

[0029] 1) Alloy weight percentage: Cu4.0%, Ag0.4%, Li1.2%, Zr0.12%, Mg0.56%, Fe<0.15%, Si<0.12%, Ti<0.1%, Zn<0.25, Al balance.

[0030] 2) Melt the weighed aluminum-lithium alloy components in a melting furnace, use a mixture of LiCl and KCl at a mass ratio of 1:1 as a covering agent, and the melting temperature is 740°C.

[0031] 3) After all the alloys are melted, pour Ar30min into the melt depth 2 / 3 for refining.

[0032] 4) After refining, let stand for 30 minutes, and then filter.

[0033] 5) Spray the filtered above melt.

[0034] The spray deposition process parameters are: spray angle 15°, atomization pressure 0.6MPa, atomization temperature 760°C, receiving pan rotation speed 40rpm, receiving pan descending speed 3.0mm / s, receiving distance 490mm, deposition chamber Ar pressure 1.05 Atmospheric pressure, the final deposition rate is 16kg / min, and the aluminum-lithium alloy ingot with a s...

Embodiment 2

[0037] Embodiment 2: the production of 2099 aluminum-lithium alloy billets;

[0038]1) Alloy weight percentage: Cu2.7%, Ag0.4%, Li1.8%, Zr0.08%, Mg0.30%, Zn0.7%, Mn0.3%, Fe<0.07%, Si<0.05% , Ti<0.1%, Al balance.

[0039] 2) Melt the weighed aluminum-lithium alloy components in a melting furnace, use a mixture of LiCl and KCl at a mass ratio of 1:1 as a covering agent, and the melting temperature is 740°C.

[0040] 3) After all the alloys are melted, pour Ar35min into the 2 / 3 of the melt depth.

[0041] 4) After refining, let stand for 30 minutes, and then filter.

[0042] 5) Spray the filtered above melt.

[0043] The spray deposition process parameters are: spray angle 18°, atomization pressure 0.5MPa, atomization temperature 760°C, receiving pan rotation speed 40rpm, receiving pan descending speed 3.2mm / s, receiving distance 485mm, deposition chamber Ar pressure 1.1 Atmospheric pressure, the final deposition rate is 15kg / min, and the aluminum-lithium alloy ingot with a s...

Embodiment 3

[0046] Embodiment 3: the production of VL30 aluminum-lithium alloy billet;

[0047] 1) Alloy weight percentage: Li3.0%, Cu1.0%, Mg0.7%, Fe<0.07%, Si<0.05%, Al balance.

[0048] 2) Melt the weighed aluminum-lithium alloy components in a melting furnace, use a mixture of LiCl and KCl at a mass ratio of 1:1 as a covering agent, and the melting temperature is 710°C.

[0049] 3) After all the alloys are melted, pass Ar40min to the 2 / 3 of the melt depth.

[0050] 4) After refining, let stand for 30 minutes, and then filter.

[0051] 5) Spray the filtered above melt.

[0052] The spray deposition process parameters are: spray angle 25°, atomization pressure 0.4MPa, atomization temperature 730°C, receiving pan rotation speed 40rpm, receiving pan descending speed 3.5mm / s, receiving distance 450mm, deposition chamber Ar pressure 1.1 Atmospheric pressure, the final deposition rate is 12kg / min, and the aluminum-lithium alloy ingot with a specification of Φ300×1000mm is obtained; the me...

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Abstract

The invention relates to aluminum-lithium alloy, in particular to a method for manufacturing a three-dimensional large-size aluminum-lithium alloy round ingot through spray forming. Ar atomization is adopted, spray forming is carried out on aluminum-lithium alloy melt which is subjected to gas removing, slag removing, refining and filtering, and a cylindrical ingot blank is formed; through optimization combination of adjustment of the spraying angle, atomization air pressure, the melt superheating temperature, the receiving disc descending speed and the rotating speed, rapid, precise and compact forming of the aluminum-lithium alloy melt is achieved, and the forming rate is not lower than 10 kg / min; the obtained ingot blank is regular in shape, high in compactness and free of chemical component macrosegregation, and the diameter of the ingot blank can reach phi 650 mm; the yield of the large-size aluminum-lithium alloy ingot blank produced through the method is more than 80%.

Description

technical field [0001] The invention relates to an aluminum-lithium alloy, in particular to a method for preparing a three-dimensional large-size aluminum-lithium alloy round ingot by spray forming. Background technique [0002] Aluminum-lithium alloy has low density, high elastic modulus, high specific strength and specific stiffness, good fatigue performance, excellent high temperature and low temperature performance, excellent corrosion resistance, excellent superplastic formability and good weldability, etc. Excellent comprehensive performance, its strength can be compared with 2024, 7075 and other aluminum alloys. Using it instead of conventional high-strength aluminum alloys can reduce the structural mass by 10% to 20%, and increase the rigidity by 15% to 20%. Compared with composite materials, aluminum-lithium alloys have high and low temperature resistance, damage resistance, repairability, and easy maintenance. Therefore, aluminum-lithium alloy has become the most ...

Claims

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Application Information

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IPC IPC(8): B22F3/115C22C21/16C22C21/18C22C21/14
CPCB22F3/115B22F2999/00C22C21/14C22C21/16C22C21/18B22F2201/11
Inventor 张豪张捷马万太周小军
Owner JIANGSU HAORAN SPRAY FORMING ALLOY
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