Isothermal die forging technology for large-size high-strength aluminum alloy parts

A technology for isothermal die forging of aluminum alloy parts, applied in the field of warm die forging technology, can solve problems such as increased die damage, uneven structure, increased cost, etc., and achieves reduced deformation difficulty, uniform grain distribution, and easy deformation Effect

Inactive Publication Date: 2016-09-28
SHANDONG NANSHAN ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it solves the difficulty of deformation of aluminum alloy and the phenomenon of die sticking and folding that may occur after large deformation die forging, its mechanical properties will be reduced due to the growth of grains and uneven structure after repeated heating, and every time Processes such as pickling and cleaning of the pass increase the damage to the mold, while reducing production efficiency and increasing costs
Therefore, it is difficult for the current die forging process to produce high-efficiency and low-cost dies with a diameter of 800mm and a maximum horizontal projected area of ​​0.6m. 2 high-strength aluminum alloy die forgings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] An isothermal die forging process for large-scale high-strength aluminum alloy parts. The size is Φ800×160mm, and the composition is (wt.%): zinc (Zn) 6-6.5, magnesium (Mg) 2-2.8, copper (Cu) 1.8~2.3, zirconium (Zr) 0.1~0.12, chromium (Cr)≤0.04, manganese (Mn)≤0.12, titanium (Ti)≤0.05, silicon (Si)≤0.10, iron (Fe)≤0.12, the balance is The large-size high-strength aluminum alloy forging billet is subjected to isothermal die forging, and the diameter is 820mm, the minimum wall thickness is 20mm, the maximum is 100mm, and the projected area reaches 0.6m 2 aluminum alloy parts; including the following steps:

[0047] 1. Machining and flaw detection of billets: Remove visible cracks and oxide scales on the surface of large-size aluminum alloy forging cakes and process them into billets with a size of Φ800×160mm. Ultrasonic waves are used to detect flaws on the billets to ensure that there are no obvious cracks and shrinkage inside the billets. Holes, inclusions and other de...

Embodiment 2

[0054] An isothermal die forging process for large-scale high-strength aluminum alloy parts. The size is Φ800×180mm, and the composition is (wt.%): zinc (Zn) 6-6.5, magnesium (Mg) 2-2.8, copper (Cu) 1.8~2.3, zirconium (Zr) 0.1~0.12, chromium (Cr)≤0.04, manganese (Mn)≤0.12, titanium (Ti)≤0.05, silicon (Si)≤0.10, iron (Fe)≤0.12, the balance is The large-sized high-strength aluminum alloy forging cake of aluminum is subjected to isothermal die forging to prepare a diameter of 900mm, a minimum wall thickness of 20mm, a maximum of 100mm, and a maximum horizontal projection area of ​​0.7m 2 aluminum alloy parts; including the following steps:

[0055] 1. Machining and flaw detection of billets: Remove visible cracks and oxide scales on the surface of large-size aluminum alloy forging cakes and process them into billets with a size of Φ800×180mm. Ultrasonic waves are used to detect flaws on the billets to ensure that there are no obvious cracks and shrinkage inside the billets. Hole...

Embodiment 3

[0062] An isothermal die forging process for large-scale high-strength aluminum alloy parts. The size is Φ1000×160mm, and the composition is (wt.%): zinc (Zn) 6-6.5, magnesium (Mg) 2-2.8, copper (Cu) 1.8~2.3, zirconium (Zr) 0.1~0.12, chromium (Cr)≤0.04, manganese (Mn)≤0.12, titanium (Ti)≤0.05, silicon (Si)≤0.10, iron (Fe)≤0.12, the balance is The large-sized high-strength aluminum alloy forging cakes of aluminum are subjected to isothermal die forging, and the diameter is 1000mm, the minimum wall thickness is 20mm, the maximum is 100mm, and the maximum horizontal projection area is 0.8m 2 aluminum alloy parts; including the following steps:

[0063] 1. Machining and flaw detection of billets: Remove visible cracks and oxide scales on the surface of large-size aluminum alloy forging cakes and process them into billets with a size of Φ820×160mm. Ultrasonic waves are used to detect flaws on the billets to ensure that there are no obvious cracks and shrinkage inside the billets. ...

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Abstract

The invention relates to an isothermal die forging technology for large-size high-strength aluminum alloy parts, and belongs to the technical field of aluminum alloy machining. According to the isothermal die forging technology, large-size aluminum alloy forging cake blanks undergo isothermal die forging formation in one step after being heated and thermally insulated for obtaining forge pieces, the forge pieces are taken out and cooled, and finally finished products are obtained; in the isothermal die forging process, the descending speed of upper dies is 0.1-0.2 mm/s. By selecting raw materials and strictly controlling forging parameters, continuous large deformation is realized on the condition that alloy crystal grains do not grow, and the large-size and high-performance aluminum alloy parts can be prepared with high efficiency and low cost. The isothermal die forging technology has the advantages that the operation is easy, the production efficiency is high, the product quality is high and the practicability is high, thereby being suitable for industrialized use and popularization.

Description

technical field [0001] The invention relates to an isothermal die forging process for large-size high-strength aluminum alloy parts, belonging to the technical field of aluminum alloy material processing. Background technique [0002] Due to the addition of a large amount of alloying elements to the high-strength aluminum alloy, the plasticity of the alloy becomes poor, and the difficulty of deformation increases, especially for large-sized parts, the difficulty increases significantly. At present, aluminum alloy die forging products are mainly medium and high-strength aluminum alloys, and high-performance high-strength aluminum alloy forgings are rarely used. Isothermal die forging technology points out an effective processing method for the plastic processing of difficult-to-deform metals, and currently for small The isothermal die forging of large and small aluminum alloys has good applicability. However, the following difficulties still exist in the isothermal die forgi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/02B21J1/06C22F1/053C22C21/10
CPCB21J5/02B21J1/06C22C21/10C22F1/053
Inventor 程仁策吕正风廖茂方清万
Owner SHANDONG NANSHAN ALUMINUM
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