Method for manufacturing high-strength 7055 aluminum alloy forge piece formed by spraying

A technology of spray forming and manufacturing method, which is applied in the field of aluminum alloy manufacturing to achieve the effects of stable quality, no component segregation, and improved mechanical properties

Inactive Publication Date: 2010-04-21
JIANGSU HAORAN SPRAY FORMING ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, for the 7055 alloy, there is no record of processing and forming it by the spray forming process at present, and the specific processing and forming process of the 7055 alloy based on spray forming is still blank in the known technology

Method used

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  • Method for manufacturing high-strength 7055 aluminum alloy forge piece formed by spraying
  • Method for manufacturing high-strength 7055 aluminum alloy forge piece formed by spraying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: A 7055 aluminum alloy aircraft hub blank was prepared by using the method of the present invention.

[0030] 1) Weight percent of each alloy composition: Si: 0.06%, Fe: 0.1%, Cu: 2.41%, Mn: 0.03%, Mg: 2.18%, Zn: 8.0%, Ti: 0.006%, Zr: 0.12%, Ni: 0.009%, Al balance. The alloy is melted in an intermediate frequency furnace with a melting temperature of 750°C.

[0031] 2) Adding a slag removal agent, degassing and deslagging the aluminum alloy melt, transferring the melt to a tundish, refining with a powder refining agent, and then standing for 15 minutes before filtering.

[0032] 3) Spray forming equipment and technology are used to spray the filtered melt. The spray deposition process parameters are: spray angle 20°, atomization pressure 0.8MPa, atomization temperature 750°C, receiving pan rotation speed 35rpm, receiving pan descending speed 2.8mm / s, receiving distance 530mm. Finally, a cylindrical aluminum alloy ingot of Φ370×1200 mm is obtained.

[0033]...

Embodiment 2

[0038] Example 2: A 7055 aluminum alloy aircraft cylinder block blank was prepared by using the method of the present invention.

[0039] 1) Weight percentage of each alloy composition: Si: 0.06%, Fe: 0.13%, Cu: 2.3%, Mn: 0.03%, Mg: 2.18%, Zn: 7.9%, Ti: 0.006%, Zr: 0.12%, Ni: 0.009%, Al balance. The alloy is melted in an intermediate frequency furnace at a melting temperature of 750°C.

[0040] 2) Adding a slag removal agent, degassing and deslagging the aluminum alloy melt, transferring the melt to a tundish, refining with a powdery refining agent, standing for 10 minutes, and then filtering.

[0041] 3) Using the self-developed spray forming equipment and process, the filtered melt is spray formed. The spray deposition process parameters are: spray angle 25°, atomization pressure 1.0MPa, atomization temperature 800°C, receiving pan rotation speed 40rpm, receiving pan descending speed 3.2mm / s, receiving distance 580mm. Finally, a cylindrical aluminum alloy ingot of Φ430×12...

Embodiment 3

[0047] Example 3: A 7055 aluminum alloy rocket engine nozzle casing forging was prepared using the method of the present invention.

[0048] 1) Weight percentage of each alloy composition: Si: 0.06%, Fe: 0.1%, Cu: 2.41%, Mn: 0.03%, Mg: 2.3%, Zn: 8.1%, Ti: 0.006%, Zr: 0.12%, Ni: 0.009%, Al balance. The melting temperature is 750°C.

[0049] 2) Add a slag removal agent to degas and remove slag from the aluminum alloy melt, transfer the melt to a tundish, refine it with a powder refining agent, then let it stand for 20 minutes, and then filter it.

[0050] 3) Using the self-developed spray forming equipment and process, the filtered melt is spray formed. The spray deposition process parameters are: spray angle 15°, atomization pressure 0.7MPa, atomization temperature 800°C, receiving pan rotation speed 30rpm, receiving pan descending speed 2.5mm / s, receiving distance 500mm. Finally, a cylindrical aluminum alloy ingot of Φ370×1200mm is obtained.

[0051] 4) The spray-formed al...

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Abstract

The invention belongs to a manufacturing technology of aluminum alloy and relates to a method for manufacturing a high-strength 7055 aluminum alloy forge piece formed by spraying. The method sequentially comprises the following steps: (a) melting components of 7055 alloy in an intermediate frequency furnace; (b) degassing, deslagging, refining and filtering an aluminum alloy fusant; (c) forming the filtered fusant by spraying to obtain a columnar aluminum alloy ingot blank; (e) carrying out hot extrusion on the aluminum alloy ingot blank formed by spraying; (f) constantly cutting the extrusion ingot as required and then carrying out free forging; (g) carrying out blocker-type forging and / or stamp forging on the blank after the free forging to obtain a stamp forging piece; and (h) carrying out T6 heat treatment on the stamp forging piece. A large-specification and high-property 7055 product can be obtained by using the method which is suitable for industrial production.

Description

technical field [0001] The invention belongs to the manufacturing technology of aluminum alloys, and relates to a manufacturing method of high-strength spray-formed 7055 aluminum alloy forgings. Background technique [0002] High-strength and tough aluminum alloy is the main structural material of aerospace vehicles represented by large aircraft. The main body is 7XXX series (Al-Zn-Mg-Cu) aluminum alloy with Zn as the main alloying element, which has high specific strength, good plasticity, Low density and other advantages, also known as ultra-high-strength aluminum alloy. [0003] 7055 aluminum alloy is an ultra-high zinc content aluminum alloy developed in the United States. It is the highest strength aluminum alloy currently used in practice and belongs to a typical 7XXX aluminum alloy. The existing 7055 aluminum alloy at home and abroad is produced by traditional casting. The casting process has shortcomings such as coarse grains, serious segregation, and low solid solu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/115C22F1/04C22C1/06C22C21/10C22F1/053
Inventor 张豪张捷杨杰瞿民锋卢曰杨
Owner JIANGSU HAORAN SPRAY FORMING ALLOY
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