Method for reducing residual stress of high-slenderness-ratio arc-shaped fillet opened aluminum alloy forge pieces

A technology with large slenderness ratio and residual stress, which is applied in the field of material science and engineering, can solve the problems of reducing the residual stress of alloys, achieve the effects of reducing residual stress, ensuring consistency, and reducing investment

Active Publication Date: 2016-05-04
中国第二重型机械集团德阳万航模锻有限责任公司
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  • Abstract
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Problems solved by technology

At present, the largest press capacity in the world is 800MN, so the residual stress of the alloy cannot be reduced by the overall cold com

Method used

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  • Method for reducing residual stress of high-slenderness-ratio arc-shaped fillet opened aluminum alloy forge pieces
  • Method for reducing residual stress of high-slenderness-ratio arc-shaped fillet opened aluminum alloy forge pieces
  • Method for reducing residual stress of high-slenderness-ratio arc-shaped fillet opened aluminum alloy forge pieces

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Example Embodiment

[0050] Example 1

[0051] The material of the forging in this embodiment is 7050 aluminum alloy, the outline is 6100×700×120mm, the web thickness is 80mm, the rib thickness is 40mm, the rib width is 65mm, the rib concave fillet radius is 22mm, and the forging radian 27489mm, the net projected area of ​​the forging is 4.27m 2 . The radius of the convex fillet 31 of the cold pressing die is 20mm.

[0052] In this embodiment, the cold-pressed steel plate is a 45# steel plate, and the specification of the steel plate is 6300×130×10mm. The purpose of the steel plate width of 120mm is to be able to cover the ribs and the concave round corners on both sides of the ribs during the first and last crimping.

[0053] The method for reducing the residual stress of the arc-shaped rib opening type forgings of aluminum alloy with large slenderness ratio of the present invention specifically includes the following steps:

[0054] Step 1: Such as image 3 As shown, firstly, the 45# steel plate 2 is ...

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Abstract

The invention discloses a method capable of avoiding buckling of forge pieces in the length direction and reducing residual stress of high-slenderness-ratio arc-shaped fillet opened aluminum alloy forge pieces. A cold compressing die is adopted for implementing the method and the method comprises the steps that A, the forge pieces are subjected to cold compression within four hours after solid solution heat treatment; B, the forge pieces are put into the cold compressing die; C, a steel plate is longitudinally arranged in the position, corresponding to a fillet, of the non-fillet face, and then cold compression deformation is conducted; D, a new steel plate is placed on each of the two sides of the part subjected to cold compression, the overlap amount of the steel plate and the indentation of former cold compression is 30%-50%, and then cold compression deformation is conducted again; E, the step D is repeated until cold compression deformation of all zones of the non-fillet face is completed; F, finally, the middle of the non-fillet face is subjected to cold compression again; and G, overall cold compression is conducted again after segmented cold compression is completed and the overall cold compression is controlled by tonnage. By adopting the method, the uniformity of the appearance of the forge pieces can be ensured and the evenness of the cold compression deformation amount of the forge pieces is improved.

Description

technical field [0001] The invention belongs to the field of material science and engineering, in particular to a method of reducing the net projected area by 4m through segmental cold compression. 2 A method for the residual stress of the above-mentioned aluminum alloy large slenderness ratio curved rib opening type forgings. Background technique [0002] It is known that aluminum alloy has the advantages of low density, high specific strength, good fatigue strength and stress corrosion resistance, etc., and plays a very important role in the development of the national economy. Aluminum alloy forgings are a very important form of aluminum alloy products. Aluminum alloy forgings have the advantages of uniform structure and good mechanical properties, and are mainly used in particularly important load-bearing structural components in the fields of aerospace, transportation, ships, energy and power, and petrochemicals. Many production processes of forgings will generate res...

Claims

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Application Information

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IPC IPC(8): B21K27/00C22F1/04
CPCB21K27/00C22F1/04
Inventor 沈文涛张鹏翟瑞志崔明亮
Owner 中国第二重型机械集团德阳万航模锻有限责任公司
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