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A large-scale 7-series aluminum alloy ingot for civil aircraft and its preparation method

An aluminum alloy ingot, large-scale technology, applied in the field of large-scale 7-series aluminum alloy ingots for civil aircraft and its preparation, can solve the online test of unseen slag content, which cannot meet the hydrogen content of aluminum alloy ingots for civil aircraft Control requirements, unable to produce 7-series aluminum alloy ingots and other problems, to solve the problem of melt purification, solve the effect of component segregation control, and fine grains

Active Publication Date: 2021-07-13
SHANDONG NANSHAN ALUMINUM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-purification of aviation aluminum alloy ingot requires multi-stage strict purification of aluminum alloy melt, and strict control of hydrogen content and slag content in the melt. Generally ≤0.15ml / 100gAl, still unable to meet the requirements of hydrogen content control of aluminum alloy ingots for civil aircraft, and at the same time, there is no online test of slag content in the casting of 7 series aluminum alloy ingots
[0014] Due to the above problems and reasons, it is currently impossible to produce 7-series aluminum alloy ingots that meet the standards for civil aircraft use

Method used

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  • A large-scale 7-series aluminum alloy ingot for civil aircraft and its preparation method
  • A large-scale 7-series aluminum alloy ingot for civil aircraft and its preparation method
  • A large-scale 7-series aluminum alloy ingot for civil aircraft and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Step 1: Calculate the aluminum ingot, zinc ingot, copper plate, magnesium ingot, The weight of aluminum-manganese master alloy, aluminum-chromium master alloy, aluminum-titanium master alloy, aluminum-zirconium master alloy, and according to the calculated results, weigh various raw materials, including aluminum ingots, zinc ingots, copper plates, magnesium ingots, and aluminum-manganese master alloys , aluminum-chromium master alloy, aluminum-titanium master alloy, and aluminum-zirconium master alloy need to be divided into small pieces in advance before weighing.

[0048] Step 2: Put the fully dried aluminum ingots into the melting furnace, and control the furnace temperature to 1050°C during the melting process; after the aluminum ingots are completely melted, stir them for 25 minutes with an electromagnetic stirring device. After the melt temperature reaches 700°C, alloying begins, and the melt temperature fluctuation range is controlled at 700-750°C. Copper plates ...

Embodiment 2

[0056] Step 1: Calculate the aluminum ingot, zinc ingot, copper plate, magnesium ingot, The weight of aluminum-manganese master alloy, aluminum-chromium master alloy, aluminum-titanium master alloy, aluminum-zirconium master alloy, and according to the calculation results, weigh various raw materials, including aluminum ingots, zinc ingots, copper plates, magnesium ingots, aluminum-manganese master alloys, Aluminum-chromium master alloys, aluminum-titanium master alloys, and aluminum-zirconium master alloys need to be divided into small pieces in advance before weighing.

[0057] Step 2: Put the fully dried aluminum ingots into the melting furnace, and control the furnace temperature to 950°C during the melting process; after the aluminum ingots are completely melted, stir for 35 minutes with an electromagnetic stirring device. After the melt temperature reaches 700°C, alloying begins, and the melt temperature fluctuation range is controlled at 700-750°C. Copper plates and var...

Embodiment 3

[0065] Step 1: Calculate the aluminum ingot, zinc ingot, copper plate, magnesium ingot, The weight of aluminum-manganese master alloy, aluminum-chromium master alloy, aluminum-titanium master alloy, aluminum-zirconium master alloy, and according to the calculated results, weigh various raw materials, including aluminum ingots, zinc ingots, copper plates, magnesium ingots, and aluminum-manganese master alloys , Aluminum-chromium master alloy, aluminum-titanium master alloy, aluminum-zirconium master alloy need to be divided into small pieces before weighing;

[0066] Step 2: Put the fully dried aluminum ingots into the melting furnace, and control the furnace temperature to 1000°C during the melting process; after the aluminum ingots are completely melted, use electromagnetic stirring equipment to stir for 30 minutes. When the melt temperature reaches 700°C, alloying begins, and the temperature fluctuation range of the melt is controlled at 700-750°C. Add copper plates and vari...

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Abstract

A large-scale 7-series aluminum alloy ingot for civil aircraft and a preparation method thereof, belonging to the field of aluminum alloy manufacturing, the mass percentages of each substance in the aluminum alloy ingot are: the Si content is less than 0.08%, the Fe content is less than 0.10%, The content of Cu is 2.1%-2.4%, the content of Mg is 2.0%-2.2%, the content of Mn is less than 0.05%, the content of Cr is less than 0.02%, the content of Zn is 7.8%-8.2%, the content of other impurity elements is less than 0.15%, and the balance is Al. The invention adopts three-stage degassing and five-stage slag removal melt purification technology, precise addition of refiner and high-efficiency utilization technology, and precise casting temperature control technology to solve the problems of melt purification, grain coarsening, component segregation, and casting cracking, etc. A series of technical problems have comprehensively improved the quality indicators of large-scale 7-series ingots, and produced large-scale and high-quality 7-series aluminum alloy ingots that meet the production and installation requirements of civil aircraft wing girders, filling the domestic gap .

Description

technical field [0001] The invention belongs to the field of preparing aluminum alloys for civil aircraft, and in particular relates to a large-size 7-series aluminum alloy ingot for civil aircraft and a preparation method thereof. Background technique [0002] The level of the aviation manufacturing industry is an important symbol of national strength. Since my country launched the first large-scale civil aircraft development project in 1970, my country's aviation manufacturing industry has made significant progress. Especially in the past ten years, with the development of my country's economy and civil aviation industry With the rapid development, the air transport industry has shown huge market demand. The development of commercial aircraft with independent intellectual property rights has been put on the agenda as one of the national goals. The development projects of ARJ21 new regional aircraft and large passenger aircraft C919 have been launched successively. ARJ21 airc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22C1/03C22C1/06B22D11/04B22D11/16C22F1/053
CPCB22D11/003B22D11/04B22D11/16C22C1/026C22C1/03C22C1/06C22C21/10C22F1/053
Inventor 吕正风孙有政赵国群石景岩陈康华曹善鹏隋来智马军星
Owner SHANDONG NANSHAN ALUMINUM