A low-stress manufacturing process for eliminating anisotropy of 2a12 aluminum alloy forgings

Abstract

The invention relates to a low-stress manufacturing process for eliminating anisotropism of a 2A12 aluminum alloy forging, and belongs to the field of metal material engineering. In the aerospace field, according to the use and stress environment of an aluminum alloy product, the requirement for lowering the anisotropism of a material is high, and especially the requirements of an airtight knuckle bearing type forging for the chordwise and radial strength and toughness of the product are higher. Especially the requirement of an airtight knuckle bearing for a space suit for the machining precision of the product is quite high. For an aluminum alloy capable of being subjected to heat treatment and strengthening, after the material is quenched, large internal quenching stress exists in the material, and for the product with the high requirement for machining precision, waste can be possibly caused by size tolerance after finish machining. According to the method, the anisotropism, in the chordwise direction and the radial direction, of the product can be effectively eliminated, especially the internal stress of the product is effectively eliminated, and the machining yield of the product is remarkably increased.

Description

Technical field [0001] The invention relates to a low-stress manufacturing process for eliminating the anisotropy of 2A12 aluminum alloy forgings, belonging to the field of metal material engineering. The method can effectively eliminate the anisotropy of the product in the chord and radial directions, especially effectively The internal stress of the product is improved, and the machining yield of the product is significantly improved. Background technique [0002] In the aerospace field, according to the use of aluminum alloy products and the stress environment, there is a high requirement for reducing the anisotropy of the material, especially for airtight joint bearing forgings, which requires the chord and radial strength and toughness of the product higher. Especially for aerospace and aerospace applications, airtight joint bearings have very high requirements for product processing accuracy. [0003] The traditional manufacturing methods are mostly directly processed by ex...

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Problems solved by technology

[0003] The traditional manufacturing methods are mostly directly processed by extruded rods and extruded pipes. The performance of the airtight joint bearings obtained in this way is better in the chord direction, but the performance in the radial direction, which also requires higher force, is better. Low, especially the low elongation of the material, there is a safety hazard in the long-term use process

[0004] In addition, for aluminum alloys that can be heat-treated and strengthened, after the material is quenched, there is a large quenching internal stress in the material. resulting in waste

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