7-series aluminum alloy profile used for civil aircraft first rib and preparation method thereof

An aluminum alloy profile, No. 1 technology, applied in the field of 7-series aluminum alloy profiles for the No. 1 rib of civil aircraft and its preparation, can solve the difficulty in the shape and position tolerance of the profile, and the difference in the size, structure and performance of the head end and tail end of the profile , It is difficult to ensure the uniformity of profile deformation, etc., to achieve the effect of ensuring uniformity of performance, reducing temperature and performance differences

Inactive Publication Date: 2020-07-14
SHANDONG NANSHAN ALUMINUM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production of 7-series aluminum alloy profiles for the No. 1 rib by the existing technology has the following bottleneck problems in terms of equipment conditions and production technology: the extrusion technology of isothermal heating of the ingot is used, so that the actual The extrusion temperature far exceeds the temperature of the head end, resulting in significant differences in the size, structure and performance of the head end and the tail end of the profile; during the stretching process of a large-section profile with a meter weight exceeding 47kg / m, it is difficult to ensure the deformation of each position of the profile Uniformity, which makes it difficult to pass the shape and position tolerance of the profile; the unevenness of material extrusion deformation will affect the artificial aging of the 7-series profile, and it is difficult to ensure the uniformity of conductivity and strength at different positions of the profile

Method used

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  • 7-series aluminum alloy profile used for civil aircraft first rib and preparation method thereof
  • 7-series aluminum alloy profile used for civil aircraft first rib and preparation method thereof
  • 7-series aluminum alloy profile used for civil aircraft first rib and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0045] Step 1: Use semi-continuous casting to produce large-scale 7-series ingots with all indicators meeting the technical specifications, and perform homogenization annealing. Chemical analysis of the ingot shows that the Si content is 0.05%, the Fe content is 0.08%, the Cu content is 2.25%, the Mg content is 2.15%, the Mn content is 0.02%, the Cr content is 0.0084%, the Zn content is 8.21%, and the Ti content is 0.035%. %, Zr content is 0.103%, and the balance is aluminum;

[0046] Step 2: Heat and heat-preserve the mold with a box-type mold heating furnace to ensure that the core of the mold is warm and the mold temperature is heated to 390°C;

[0047] Step 3: The set temperature of the extrusion barrel is 400°C, and the extrusion can only be carried out after the temperature reaches. ℃ / m, put the heated ingot into the extrusion cylinder, put the ingot head into the left and right double-hole molds, and perform reverse extrusion. The extrusion axis speed of reverse extrus...

Embodiment 2

[0051] Step 1: Use semi-continuous casting to produce large-scale 7-series ingots with all indicators meeting the technical specifications, and perform homogenization annealing. Chemical analysis of the ingot shows that the content of Si is 0.06%, the content of Fe is 0.08%, the content of Cu is 2.15%, the content of Mg is 2.19%, the content of Mn is 0.02%, the content of Cr is 0.0081%, the content of Zn is 7.98%, and the content of Ti is 0.034 %, Zr content is 0.098%, and the balance is aluminum;

[0052] Step 2: Heat and heat-preserve the mold with a box-type mold heating furnace to ensure that the core of the mold is warm and the mold temperature is heated to 410°C;

[0053] Step 3: The temperature of the extrusion barrel is set at 420°C, and the extrusion can only be carried out after the temperature reaches the temperature. ℃ / m, put the heated ingot into the extrusion barrel, put the ingot head into the left and right double-hole molds, and perform reverse extrusion. The...

Embodiment 3

[0057] Step 1: Use semi-continuous casting to produce large-scale 7-series ingots with all indicators meeting the technical specifications, and perform homogenization annealing. Chemical analysis of the ingot shows that the Si content is 0.05%, the Fe content is 0.09%, the Cu content is 2.13%, the Mg content is 2.12%, the Mn content is 0.01%, the Cr content is 0.0071%, the Zn content is 8.14%, and the Ti content is 0.029% %, Zr content is 0.114%, and the balance is aluminum;

[0058] Step 2: Heat and heat-preserve the mold with a box-type mold heating furnace to ensure that the core of the mold is warm and the mold temperature is heated to 400°C;

[0059]Step 3: The set temperature of the extrusion cylinder is 410°C, and the extrusion can only be carried out after the temperature reaches. ℃ / m, put the heated ingot into the extrusion cylinder, put the ingot head into the left and right double-hole molds, and perform reverse extrusion. The extrusion axis speed of reverse extrus...

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Abstract

The invention discloses a 7-series aluminum alloy profile used for a civil aircraft first rib and a preparation method thereof and belongs to the field of manufacturing of aluminum alloy profiles usedfor a civil aircraft. The profile comprises the following substances including, by weight, smaller than 0.08% of Si, smaller than 0.10% of Fe, 2.1%-2.4% of Cu, 2.0%-2.2% of Mg, smaller than 0.05% ofMn, smaller than 0.02% of Cr, 7.8%-8.2% of Zn, 0.02%-0.06% of Ti, 0.08%-0.12% of Zr and the balance Al. According to the 7-series aluminum alloy profile used for the civil aircraft first rib and the preparation method thereof, to meet requirements for the performance of the aluminum alloy profile used for the civil aircraft first rib, an ingot casting step heating isothermal reverse extrusion technology, a combined tooling uniform stretching technology and the like are adopted, the uniformity of the performance of different portions of the profile is guaranteed, and the 7-series aluminum alloyprofile meeting the using requirements of the domestic civil aircraft first rib is produced.

Description

technical field [0001] The invention belongs to the field of manufacturing aluminum alloy profiles for civil aircraft, and in particular relates to a 7-series aluminum alloy profile for the No. 1 rib of 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 succ...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22F1/053C22C1/06C22C1/03B21C23/00
CPCB21C23/001B21C23/002C22C1/026C22C1/03C22C1/06C22C21/10C22F1/002C22F1/053
Inventor 程仁策李红萍赵国群曹善鹏孙有政晁代义马军星马新武
Owner SHANDONG NANSHAN ALUMINUM
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