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Isothermal die forging process for aluminum-magnesium-yttrium alloy

An isothermal die forging and alloy technology, which is applied in the field of alloy forging, can solve the problems of inconvenient demoulding, surface cracks, and demoulding damage, etc., and achieve the effects of improving lubricity, less scraps, and reducing cracks

Pending Publication Date: 2021-12-31
INTELLIGENT MFG INST OF HFUT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Aluminum-magnesium alloy is an aluminum alloy with magnesium as the main additive element. It has the advantages of high strength, low density, and good heat dissipation. Yttrium is added to aluminum-magnesium alloy to form Al 2 The Y phase can effectively improve the mechanical properties of the alloy. It is used for parts in aviation, electronics and other industries. In order to ensure the accuracy, it is usually forged by isothermal die forging. The wall of the cavity in the mold is stuck together, which is not easy to demould, which can seriously cause demoulding damage. In addition, in actual production, the surface layer of the product is prone to tensile cracks perpendicular to the direction of forging and pressing.

Method used

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  • Isothermal die forging process for aluminum-magnesium-yttrium alloy

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Experimental program
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Effect test

Embodiment 1

[0032] In this embodiment, a kind of aluminum-magnesium-yttrium alloy is forged by the method of isothermal die forging, and its specific forging process is as follows:

[0033] Process 1: Alloy material for standby: select ingot 1, remove burrs, and obtain alloy ingot;

[0034] Process 2: Mold pretreatment: select the preliminary forging mold, remove the adhesion impurities in the cavity of the preliminary forging mold, then use metallographic sandpaper to polish the inner cavity wall of the preliminary forging mold, and measure the roughness of the cavity wall of the preliminary forging mold The roughness is 8.5 μm, select the precision forging die, adopt the same processing method as the rough forging die, and finally measure the roughness of the inner cavity wall of the precision forging die to 1.7 μm, and complete the pretreatment of the mold;

[0035] Process 3: Free forging: heat the alloy ingot to 500°C, then keep it warm for 20 minutes, then take out the heated alloy ...

Embodiment 2

[0040] In this embodiment, a kind of aluminum-magnesium-yttrium alloy is forged by the method of isothermal die forging, and its specific forging process is as follows:

[0041] Process 1: Alloy material for standby: select ingot 2, remove burrs, and obtain alloy ingot;

[0042] Process 2: Mold pretreatment: select the preliminary forging mold, remove the adhesion impurities in the cavity of the preliminary forging mold, then use metallographic sandpaper to polish the inner cavity wall of the preliminary forging mold, and measure the roughness of the cavity wall of the preliminary forging mold The roughness is 10 μm, select the precision forging die, adopt the same processing method as the rough forging die, and finally measure the roughness of the inner cavity wall of the precision forging die to 1.5 μm, and complete the pretreatment of the mold;

[0043] Step 3: Free forging: heat the alloy ingot to 510°C, then keep it warm for 15 minutes, then take out the heated alloy ingo...

Embodiment 3

[0048] In this embodiment, a kind of aluminum-magnesium-yttrium alloy is forged by the method of isothermal die forging, and its specific forging process is as follows:

[0049] Process 1: Alloy material for standby: select ingot 1, remove burrs, and obtain alloy ingot;

[0050] Process 2: Mold pretreatment: select the preliminary forging mold, remove the adhesion impurities in the cavity of the preliminary forging mold, then use metallographic sandpaper to polish the inner cavity wall of the preliminary forging mold, and measure the roughness of the cavity wall of the preliminary forging mold The roughness is 9.3 μm, select the precision forging die, adopt the same processing method as the rough forging die, and finally measure the roughness of the inner cavity wall of the precision forging die to 2 μm, and complete the pretreatment of the mold;

[0051] Process 3: Free forging: heat the alloy ingot to 520°C, then keep it warm for 10 minutes, then take out the heated alloy in...

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Abstract

The invention relates to an isothermal die forging process for aluminum-magnesium-yttrium alloy, and belongs to the technical field of alloy forging. The die forging process comprises the following steps of alloy material selection, die pretreatment, free forging, rough forging, finish forging and post-treatment. According to the isothermal die forging process, the roughness of the surface of a forge piece and the roughness of the inner cavity wall of a forging die are controlled, reasonable process parameter design is matched, so that the friction force between the forge piece and the forging die is reduced, and the hidden danger generated by die forging tension cracks is effectively reduced; meanwhile, an applicable powdery lubricant is provided and is uniformly attached to the roughened surface of the forge piece, so that the lubricating property is improved; in addition, the surface morphology of the forge piece is roughly the same through the roughening control of the forge piece, the surface roughness of a circular ring workpiece which is specifically forged by the isothermal die forging process is measured to be about 50 microns, the allowance needing to be turned is small, the machining allowance can be reduced in practical application, and the use amount of raw materials is reduced.

Description

technical field [0001] The invention belongs to the technical field of alloy forging, and in particular relates to an isothermal die forging process of an aluminum-magnesium-yttrium alloy. Background technique [0002] Aluminum-magnesium alloy is an aluminum alloy with magnesium as the main additive element. It has the advantages of high strength, low density, and good heat dissipation. Yttrium is added to aluminum-magnesium alloy to form Al 2 The Y phase can effectively improve the mechanical properties of the alloy. It is used for parts in aviation, electronics and other industries. In order to ensure the accuracy, it is usually forged by isothermal die forging. The cavity wall in the mold is stuck together, which is not easy to demould, which can seriously cause demoulding damage. In addition, in actual production, the surface layer of the product is prone to tensile cracks perpendicular to the direction of forging and pressing. Contents of the invention [0003] In or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00B23P17/00B21J3/00
CPCB21J5/002B23P23/00B21J3/00
Inventor 魏海根张真夏承东吴勇龙昌
Owner INTELLIGENT MFG INST OF HFUT
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