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Automobile corrosion-resistant die-casting aluminum alloy and preparation method thereof

A technology for casting aluminum alloy and corrosion resistance, which is applied in the field of corrosion-resistant die-casting aluminum alloy for automobiles and its preparation, can solve the problems of poor mechanical properties and poor corrosion resistance, and achieves low production process cost, improved corrosion resistance, and improved corrosion resistance. Good extrusion performance

Active Publication Date: 2019-09-03
广西平果铝合金精密铸件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a corrosion-resistant die-casting aluminum alloy for automobiles and its preparation method to solve the technical problems of poor corrosion resistance and poor mechanical properties of aluminum alloy castings in the prior art

Method used

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  • Automobile corrosion-resistant die-casting aluminum alloy and preparation method thereof
  • Automobile corrosion-resistant die-casting aluminum alloy and preparation method thereof

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Effect test

Embodiment 1

[0032] A corrosion-resistant die-casting aluminum alloy for automobiles, its components and the percentages of each component are: Si 6.5%, Mg 1.4%, Cu 0.8%, Sr 0.05%, Zn 0.4%, Mn 0.4%, Fe 0.2%, Y0.2%, Er 0.03%, the total amount of impurity elements of other metals and non-metals does not exceed 0.5%, and the rest is Al.

[0033] A method for preparing a corrosion-resistant die-casting aluminum alloy for automobiles, comprising the following steps:

[0034] S1: Melting: first add pure aluminum, pure magnesium, aluminum-silicon alloy into the melting furnace, heat to 735°C and stir to completely melt the alloy, then add electrolytic copper, aluminum-zinc alloy, iron-aluminum alloy and aluminum-manganese alloy, and continue to heat up To 770°C, after all the alloying elements are melted, the aluminum alloy melt is obtained, and the molten metal is stirred and shaken with a graphite rod, and the gas in the molten metal is discharged;

[0035]S2: Refining: adjust the temperature ...

Embodiment 2

[0041] A corrosion-resistant die-casting aluminum alloy for automobiles, its components and the percentages of each component are: Si 7.6%, Mg2.1%, Cu1.3%, Sr 0.11%, Zn 0.9%, Mn 0.8%, Fe 0.6%, Y 0.5%, Er 0.05%, the total amount of impurity elements of other metals and non-metals does not exceed 0.5%, and the rest is Al.

[0042] A method for preparing a corrosion-resistant die-casting aluminum alloy for automobiles, comprising the following steps:

[0043] S1: Melting: first add pure aluminum, pure magnesium, aluminum-silicon alloy into the melting furnace, heat to 750°C and stir to completely melt the alloy, then add electrolytic copper, aluminum-zinc alloy, iron-aluminum alloy and aluminum-manganese alloy, and continue to heat up To 810°C, after all the alloying elements are melted, the aluminum alloy melt is obtained, and the molten metal is stirred and shaken with a graphite rod, and the gas in the molten metal is discharged;

[0044] S2: Refining: adjust the temperature ...

Embodiment 3

[0050] A corrosion-resistant die-casting aluminum alloy for automobiles, its components and the percentages of each component are: Si 6.9%, Mg 1.7%, Cu 1.1%, Sr 0.07%, Zn 0.6%, Mn 0.6%, Fe 0.5%, Y0.3%, Er 0.04%, the total amount of impurity elements of other metals and non-metals does not exceed 0.5%, and the rest is Al.

[0051] A method for preparing a corrosion-resistant die-casting aluminum alloy for automobiles, comprising the following steps:

[0052] S1: Melting: first add pure aluminum, pure magnesium, aluminum-silicon alloy into the melting furnace, heat to 743°C and stir to completely melt the alloy, then add electrolytic copper, aluminum-zinc alloy, iron-aluminum alloy and aluminum-manganese alloy, and continue to heat up To 770-810°C, after all the alloying elements are melted, the aluminum alloy melt is obtained, and the molten metal is stirred and shaken with a graphite rod, and the gas in the molten metal is discharged;

[0053] S2: Refining: adjust the tempera...

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Abstract

The invention discloses an automobile corrosion-resistant die-casting aluminum alloy and a preparation method thereof, and belongs to the field of aluminum alloy die-casting processing. The automobilecorrosion-resistant die-casting aluminum alloy comprises, by weight, 6.5%-7.6% of Si, 1.4%-2.1% of Mg, 0.8%-1.3% of Cu, 0.05%-0.11% of Sr, 0.4%-0.9%of Zn, 0.4%-0.8% of Mn, 0.2%-0.6% of Fe, 0.2%-0.5%of Y, 0.03%-0.05% of Er, less than or equal to 0.5% of other metals and non-metals, and the balance Al. The automobile corrosion-resistant die-casting aluminum alloy is prepared by the steps of melting, refining, standing, die casting, solid solution quenching treatment, aging treatment and the like. The aluminum alloy has the advantages that the corrosion resistance is greatly improved, the tensile property at high temperature is good, the toughness is high, and the extrusion resistance is good; and the preparation method is simple and feasible in process, and has the advantages of being highin safety and low in production process cost, and the produced aluminum alloy casting meets the use requirements of the workpiece needing to bear a large dynamic load.

Description

technical field [0001] The invention relates to the field of aluminum alloy die-casting processing, in particular to a corrosion-resistant die-casting aluminum alloy for automobiles and a preparation method thereof. Background technique [0002] The application of aluminum alloys in the automotive field mainly focuses on the casting of engine components and wheel hubs. At the same time, the application of aluminum alloys on automobile body panels has gradually attracted attention; aluminum alloys can be divided into deformed aluminum alloys and cast aluminum alloys according to processing methods. Two types of alloys. Among casting aluminum alloys, die casting is a casting method in which molten alloy liquid is poured into a pressure chamber to fill the cavity of a steel mold at high speed, and the alloy liquid is solidified under pressure to form a casting. [0003] Traditional aluminum alloy die castings have poor corrosion resistance and poor mechanical properties, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/03C22F1/043B22D17/00
CPCB22D17/00C22C1/026C22C1/03C22C21/02C22F1/002C22F1/043
Inventor 梁春才
Owner 广西平果铝合金精密铸件有限公司
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