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Preparation method of 7B04 aluminium alloy section

An aluminum alloy profile, 7B04 technology, which is applied in the field of aluminum alloy profile preparation, can solve the problems that mechanical properties and electrical conductivity cannot meet the index requirements at the same time, difficult to form large-sized round ingots, etc., and achieve the effect of good mechanical properties.

Inactive Publication Date: 2010-06-30
NORTHEAST LIGHT ALLOY CO LTD
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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 preparation method for 7B04 aluminum alloy profiles in order to solve the problems that large-size round ingots are difficult to form and the mechanical properties and electrical conductivity cannot simultaneously meet the index requirements in the process of preparing profiles for existing 7B04 aluminum alloys.

Method used

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specific Embodiment approach 1

[0007] Specific Embodiment 1: The preparation method of 7B04 aluminum alloy profiles in this embodiment, the profiles are composed of the following components by weight: Cu: 1.4% to 2.0%, Mg: 1.8% to 2.8%, Mn: 0.2% to 0.6%, Cr≤ 0.1%~0.25%, Zn≤5.0%~6.5%, Si≤0.1%, Fe≤0.05%~0.25%, Ti≤0.05%, Ni≤0.1%, single impurity≤0.05%, total impurity≤0.1%, the rest It is Al; it is characterized in that its preparation method is realized through the following steps: 1. melting and casting aluminum alloy round ingot; 3. Extrude the air-cooled alloy round ingot at a temperature of 380-420°C and keep it warm for 1-2 hours; 4. Quench the extruded alloy profile at a temperature of 465-475 ℃, heat preservation for 20 to 270 minutes for solution treatment, transfer time less than 30 seconds, cooling water temperature less than 30 ℃; 5. Perform aging treatment on the quenched alloy profiles to obtain 7B04 aluminum alloy profiles in different states; step 1 The melting temperature is 730-765°C.

specific Embodiment approach 2

[0008] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, the alloy round ingot is smelted and cast: the raw material is pure aluminum ingot, and the furnace is required to be cleaned. TiO 2 Powder protection, online degassing filter outside the furnace. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0009] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the temperature in step 2 is 455-465°C. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a preparation method of a 7B04 aluminium alloy section, which solves the problems that a large-sized round cast ingot is difficult to form and mechanical property and electrical conductivity can not meet index requirements at the same time in the traditional preparation process of the 7B04 aluminium alloy section. The preparation method comprises the following steps of: 1, smelting the round cast ingot of a casting alloy; 2, uniformly annealing; 3, extruding into the section; 4, quenching; and 5, aging to obtain the 7B04 aluminium alloy section. The 7B04 aluminium alloy section has properties meeting the index requirements, and achieves the finished product ratio more than 80 percent.

Description

technical field [0001] The invention relates to a preparation method of an aluminum alloy profile. Background technique [0002] 7B04 aluminum alloy belongs to the Al-Zn-Mg-Cu series aluminum alloy. After heat treatment, the alloy profile has high specific strength, good fracture toughness and excellent process performance. It has been widely used in the wall of large military aircraft in recent years. Important structural parts such as plates and bulkheads can effectively reduce the strength loss of materials, reduce the weight of the aircraft body, simplify the manufacturing process of the aircraft, and promote the development of the aviation industry [0003] At present, in the process of preparing shaped materials for 7B04 aluminum alloy, there are problems that it is difficult to form large-scale round ingots, and the mechanical properties and electrical conductivity cannot meet the index requirements at the same time. Contents of the invention [0004] The purpose o...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22F1/053B22D21/04
Inventor 徐忠艳王志超石钰祁艳华李广宇
Owner NORTHEAST LIGHT ALLOY CO LTD
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