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Increasing strength of an aluminum alloy

An aluminum alloy, strong technology, applied in the direction of the wheel, etc.

Inactive Publication Date: 2018-05-25
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solution Heat Treatment of Aluminum Alloys

Method used

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  • Increasing strength of an aluminum alloy
  • Increasing strength of an aluminum alloy
  • Increasing strength of an aluminum alloy

Examples

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example 1

[0047] Several example and several comparative example methods of methods for increasing the strength of aluminum alloys were performed. Three aluminum alloy samples were prepared containing about 4 wt % to about 6 wt % silicon, about 0.2 wt % to about 0.4 wt % chromium, about 0.1 wt % to about 0.5 wt % magnesium, about 0.05 wt % to about 0.1 wt % titanium, equal to or less than about 0.15 wt % iron, less than 0.01 wt % zinc, less than 0.003 wt % phosphorus, about 0.01 wt % to about 0.015 wt % strontium and the balance aluminum.

[0048] Each aluminum alloy sample was solution heat treated at a solution heat treatment temperature of 540° C. for a period of about 3 to 8 hours. Each aluminum alloy sample was then quenched at a quenching temperature of 80 °C. The first aluminum alloy sample was age hardened at an age hardening temperature of 150°C. The second aluminum alloy sample was age hardened at an age hardening temperature of 175°C, and the third aluminum alloy sample was...

example 2

[0057] An aluminum alloy was prepared according to an example of a method for increasing the strength of an aluminum alloy. The aluminum alloy contains about 4 wt % to about 6 wt % silicon, about 0.2 wt % to about 0.4 wt % chromium, about 0.3 wt % to about 0.6 wt % magnesium, about 0.05 wt % to about 0.1 wt % titanium, equal to Or less than about 0.15 wt % iron, less than 0.01 wt % zinc, less than 0.003 wt % phosphorus, about 0.001 wt % strontium and the balance aluminum.

[0058] Aluminum alloy is cast through a low-pressure die-casting process to form the wheel. The aluminum alloy is then solution heat treated at a solution heat treatment temperature of 540° C. for a period of about 3 hours to about 8 hours. The aluminum alloy samples were then quenched in water at a quenching temperature of about 60°C to about 80°C, and age hardened at an age hardening temperature of 175°C for 6 hours. Wheels cast from aluminum alloys such as image 3 shown.

[0059] Yield strength, ult...

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Abstract

In an example of a method for increasing strength of an aluminum alloy, the aluminum alloy is formed in a molten state. The aluminum alloy includes from about 4 wt % to about 11 wt % silicon, from greater than 0.2 wt % to about 0.5 wt % chromium, from about 0.1 wt % to about 0.5 wt % magnesium, from about 0.01 wt % to about 0.1 wt % titanium, equal to or less than about 0.5 wt % iron, equal to orless than about 0.5 wt % manganese, and a balance of aluminum. The aluminum alloy is subjected to a solution heat treatment. The aluminum alloy is quenched, and the aluminum alloy is age hardened at an age hardening temperature ranging from about 140 to 175 degrees centigrade for a time period ranging from about 3 hours to about 35 hours.

Description

technical field [0001] The present disclosure generally relates to increasing the strength of aluminum alloys. Background technique [0002] The die casting process is commonly used to form high-volume automotive components. In particular, aluminum alloys are commonly used to form structural components in die-casting processes because aluminum alloys have many favorable properties, such as light weight and high dimensional stability, which allow the formation of more complex and thin-walled part. Aluminum die castings have traditionally had limitations on ductility due to air entrapment and the formation of iron (Fe) intermetallic phases. Many techniques developed to reduce these problems, such as semi-solid die casting and ultra-vacuum die casting, result in porosity-free castings. Contents of the invention [0003] In an example of a method of increasing the strength of an aluminum alloy, the aluminum alloy is formed in a molten state. The aluminum alloy comprises ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22F1/043
CPCC22C21/02C22F1/043B22D17/00B22D18/04B22D21/007B60B2360/104
Inventor 胡斌王攀卢琦
Owner GM GLOBAL TECH OPERATIONS LLC