Preparation method of Al-Mg-Si series aluminum alloy die forging for inhibiting coarse grain structure

A technology of coarse-grain structure and aluminum alloy, which is applied in the field of aluminum alloy processing and preparation, can solve the problems of coarse-grain structure, large deformation of aluminum alloy die forgings, and high cumulative deformation energy, and achieve excellent fatigue resistance and anodic oxidation performance. Reduce strain energy storage and avoid the effect of high strain energy storage

Active Publication Date: 2021-08-13
D MAG KUNSHAN NEW MATERIAL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: Aiming at the problems of large deformation amount, high cumulative deformation energy and easy occurrence of coarse-grained structure of aluminum alloy die forgings, the present invention proposes an Al-Mg-Si series aluminum alloy with suppressed coarse-grained structure The preparation method of the die forging

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018]An Al-Mg-Si aluminum alloy with suppressed coarse grain structure, the alloy includes the following components: Mg 0.9%, Si 1.0%, Cu 0.19%, Fe 0.21%, Mn 0.11%, Zr 0.001%, Cr 0.20 %, Sc 0.001%, V 0.011%, Ti0.16%, and other unrestricted transition group elements whose content is less than 0.1%, the balance is Al and unavoidable impurities, except Fe element, the total of all other transition group elements The sum of content is controlled between 0.48%~0.51%, and [Fe]%+1.1[Mn]%≤0.33%, [Mn]%+3[Cr]%≤0.71%, and the content of other unavoidable impurity elements less than 0.02%, and the total content of unavoidable impurity elements is less than 0.09%.

[0019] The preparation method of the alloy die forging comprises the following steps:

[0020] Put the weighed industrial pure aluminum ingots into the melting furnace for melting treatment, heat the molten aluminum to 730°C~740°C, and add aluminum-based intermediate alloys to the melt according to the calculated addition amo...

Embodiment 2

[0027] An Al-Mg-Si series aluminum alloy die forging, the alloy selection includes the following components: Mg 0.8%, Si 1.3%, Cu 0.09%, Fe 0.11%, Mn 0.45%, Zr 0.15%, Cr 0.12% , Sc 0.08%, V 0.02%, Ti0.07%, and other unrestricted transition group elements whose content is less than 0.1%, the balance is Al and unavoidable impurities, except Fe element, the total content of all other transition group elements The sum is controlled between 0.79%~0.82%, and [Fe]%+1.1[Mn]%≤0.61%, [Mn]%+3[Cr]%≤0.81%, and the content of other unavoidable impurity elements is less than 0.03%, while the total content of unavoidable impurity elements is less than 0.12%.

[0028] The preparation method of the alloy die forging comprises the following steps:

[0029] Put the weighed industrial pure aluminum ingot into the melting furnace for melting treatment, heat the molten aluminum to 740°C~750°C, add aluminum-based intermediate alloys to the melt according to the calculated addition amount, and cover ...

Embodiment 3

[0037] A method for eliminating the coarse-grain structure of Al-Mg-Si series aluminum alloy die forgings. The alloy selection includes the following components: Mg0.8%, Si 0.7%, Cu 0.09%, Fe 0.13%, Mn 0.4%, Zr 0.15%, Cr 0.16%, Sc 0.012%, V0.02%, Ti 0.06%, and other unrestricted transition group elements whose content is less than 0.1%, the balance is Al and unavoidable impurities, except Fe element, all other transition group elements The sum of the total content is controlled between 0.85% and 0.91%, and [Fe]%+1.1[Mn]%≤0.57%, [Mn]%+3[Cr]%≤0.88%, and the rest of the unavoidable impurity elements The contents are all less than 0.02%, and the total content of unavoidable impurity elements is less than 0.08%.

[0038] The preparation method of the alloy die forging comprises the following steps:

[0039] According to the composition requirements of this example, the electrolytic aluminum liquid and the aluminum-based intermediate alloy are put into the melting furnace for melti...

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Abstract

The invention relates to a preparation method of an Al-Mg-Si series aluminum alloy die forging for inhibiting a coarse grain structure. Aluminum alloy comprises the following components in percentage by mass: 0.4-1.5% of Mg, 0.3-1.5% of Si, 0.01-0.7% of Cu, 0.01-0.3% of Fe, 0.01-1.0% of Mn, 0.001-0.25% of Zr, 0.01-0.5% of Cr, 0.001-0.25% of Sc, 0.01-0.1% of V, 0.01-0.25% of Ti and other transition elements. The preparation method comprises the steps of melt cleaning treatment, near-forged multi-rod hot top casting, multi-stage speed control homogenization, room-temperature or high-temperature die forging forming, two-stage solid solution and aging treatment. The prepared die forging has no coarse grain or coarse grain structure characteristic, is excellent in fatigue resistance and anodic oxidation performance, and can be used for preparing aluminum alloy structural parts of vehicles and transportation tools.

Description

technical field [0001] The invention belongs to the field of aluminum alloy processing and preparation, and in particular relates to a method for preparing a die forging of an Al-Mg-Si series aluminum alloy with a coarse-grained structure suppressed. Background technique [0002] The Al-Mg-Si series aluminum alloy belongs to the heat-treatable aluminum alloy, and the Mg precipitated after solid solution aging 2 Si phase is its main strengthening phase, which makes the alloy have excellent strength, elongation and good processing performance. Add transition elements such as Mn and Cr to make it have good hardenability, impact toughness and corrosion resistance while ensuring strength, so as to replace the steel structure and achieve a weight reduction effect of 30%-40%. . Aluminum alloy die forging technology refers to the processing method of aluminum products that uses molds on special equipment to form aluminum alloy blanks in a hot state to obtain excellent mechanical p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/02B21K29/00C22C1/02C22C1/03C22C21/02C22C21/08C22F1/05
CPCB21J5/02B21K29/00C22C1/026C22C1/03C22C21/02C22C21/08C22F1/05
Inventor 涂季冰周宗岩张金虹
Owner D MAG KUNSHAN NEW MATERIAL TECH CO LTD
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