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Densification treatment method of spray deposition ultrahigh-strength aluminum alloy, application and densified preformed blank prepared through densification treatment method

A treatment method and spray deposition technology, applied in the field of densification of preforms and spray deposition of ultra-high-strength aluminum alloys, can solve problems such as low performance, improve plasticity, good surface quality, prevent cracking or cannot be formed. Effect

Inactive Publication Date: 2021-07-09
RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for densification of ultra-high-strength aluminum alloys by spray deposition in order to solve the defects in the prior art that extrusion and rolling deformation densification lead to lower performance in the vertical texture direction of forgings

Method used

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  • Densification treatment method of spray deposition ultrahigh-strength aluminum alloy, application and densified preformed blank prepared through densification treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The total alloy content of the spray-deposited 7034 ultra-high-strength aluminum alloy exceeds 12%, and the density of the spray-deposited blank is 96.5%. The material in this state is very brittle, and direct pierce or die forging often leads to cracking.

[0033] A method for densification of ultra-high-strength aluminum alloys by spray deposition, comprising the following steps:

[0034] Step 1, prepare preform

[0035] The spray-deposited 7034 ultra-high-strength aluminum alloy billet is processed into a cylindrical preform, wherein the diameter of the bottom surface of the cylindrical preform is D=50mm, and the height h=120mm.

[0036] Step 2. Prepare surrounding materials

[0037] The 7A60 aluminum alloy with better plasticity is used as the surrounding material to process a cylindrical surrounding ring. The inner circle diameter of the cylindrical surrounding ring is d=50mm, the height h=120mm, and the wall thickness is 8mm. The inner circle of the cylindrical s...

Embodiment 2

[0049] The total alloy content of the spray-deposited 7136 ultra-high-strength aluminum alloy exceeds 12%, and the density of the spray-deposited blank is 96.8%. The material in this state is very brittle, and direct pierce or die forging often leads to cracking.

[0050] A method for densification of ultra-high-strength aluminum alloys by spray deposition, comprising the following steps:

[0051] Step 1, prepare preform

[0052] The spray-deposited 7136 ultra-high-strength aluminum alloy billet is processed into a cylindrical preform, wherein the diameter of the bottom surface of the cylindrical preform is D=100mm, and the height h=60mm.

[0053] Step 2. Prepare surrounding materials

[0054] The 7075 aluminum alloy with better plasticity is used as the surrounding material to process a cylindrical surrounding ring. The inner circle diameter of the cylindrical surrounding ring is d=100mm, the height h=60mm, and the wall thickness is 20mm. The inner circle of the cylindrical su...

Embodiment 3

[0065] The total alloy content of the spray-deposited 7093 ultra-high-strength aluminum alloy exceeds 12%, and the density of the spray-deposited blank is 95.6%. The material in this state is very brittle, and direct pierce or die forging often leads to cracking.

[0066] A method for densification of ultra-high-strength aluminum alloys by spray deposition, comprising the following steps:

[0067] Step 1, prepare preform

[0068] The spray-deposited 7093 ultra-high-strength aluminum alloy billet is processed into a cylindrical preform, wherein the diameter of the bottom surface of the cylindrical preform is D=80mm, and the height h=100mm.

[0069] Step 2. Prepare surrounding materials

[0070] The 7D68 aluminum alloy with better plasticity is used as the surrounding material to process a cylindrical surrounding ring. The inner circle diameter of the cylindrical surrounding ring is d=80mm, the height h=100mm, and the wall thickness is 15mm. The inner circle of the cylindrical ...

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Abstract

The invention discloses a densification treatment method of a spray deposition ultrahigh-strength aluminum alloy. a spray deposition ultrahigh-strength aluminum alloy cylindrical preformed blank with a gap is densified in the deformation process through surrounding treatment and high-frequency forging deformation, the blank is limited by a surrounding material in the deformation process, different from edge cracking caused by the tension-compression stress state of free upsetting deformation, the main stress state is three-direction pressure stress, the main deformation state is two-direction compression and one-direction extension, the deformation mechanical state diagram is beneficial to improvement of the plasticity of metal, the deformation amount each time is small, the friction resistance is reduced when the metal is deformed, the deformation work is reduced, the surface quality of the deformed material is good, the cracking phenomenon does not occur, and meanwhile, gaps in the material are welded at the high temperature and under the high pressure in the deformation process, so that the alloy is densified, and subsequent machining is facilitated.

Description

technical field [0001] The invention relates to the technical field of plastic processing of metal materials, in particular to a spray deposition ultra-high-strength aluminum alloy densification treatment method, application and densification preform. Background technique [0002] The spray deposition technology overcomes the shortcomings of the traditional metallurgical casting process, such as coarse structure, segregation, complex powder metallurgy process, and serious sintering oxidation. At present, spray deposition technology has been widely used in the research and production of ultra-high-strength aluminum alloys. However, the microstructure of ultra-high-strength aluminum alloy materials prepared by spray deposition technology is not dense and contains a certain amount of voids. Generally, the density is about 96%. Very crispy. For spray-deposited 7-series Al-Zn-Mg-Cu ultra-high-strength aluminum alloys (such as 7034, 7136 and 7093, etc.) with a total alloy content...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04
CPCC22F1/04
Inventor 吴福郑晓静高蔚李昂陈开媛张毅
Owner RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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