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Methods of enhancing mechanical properties of aluminum alloy high pressure die castings

A technology of mechanical properties and aluminum alloy, which is applied in the field of manufacturing aluminum alloy high-pressure die-casting parts, can solve the problems of energy consumption and insufficient mechanical properties

Active Publication Date: 2010-09-22
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, conventional aluminum alloy high-pressure die-casting methods are insufficient in terms of energy consumption and achievable mechanical properties

Method used

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  • Methods of enhancing mechanical properties of aluminum alloy high pressure die castings
  • Methods of enhancing mechanical properties of aluminum alloy high pressure die castings
  • Methods of enhancing mechanical properties of aluminum alloy high pressure die castings

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Embodiment Construction

[0095] specific implementation

[0096] Embodiments generally relate to methods of improving the mechanical properties of aluminum alloy high pressure die castings and methods of making aluminum alloy high pressure die castings in both high pressure die casting and heat treatment methods. "Casting" as used herein generally refers to an aluminum alloy high pressure die casting formed by solidification of an aluminum alloy composition. Thus, any stage of the post-solidification high pressure die casting process and / or heat treatment process may be referred to herein as a casting, whether cooling, quenching, aging, or otherwise. Castings may also include any part, component, product formed via embodiments of the present invention.

[0097] Furthermore, as used herein, "mechanical properties" and related terms generally refer to at least one and / or any combination of strength, hardness, toughness, elasticity, plasticity, brittleness, ductility, and malleability, which measure met...

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Abstract

Methods of enhancing mechanical properties of aluminum alloy high pressure die castings are disclosed herein. An aluminum alloy composition forming a casting comprises, by weight of the composition, at least one of a magnesium concentration greater than about 0.2%, a copper concentration greater than about 1.5%, a silicon concentration greater than about 0.5%, and a zinc concentration greater than about 0.3%. After solidification, a casting is cooled to a quenching temperature between about 300 DEG C. and about 500 DEG C. Upon attainment of the quenching temperature, the casting is removed from the die and immediately quenched in a quench media. Following quenching, the casting is pre-aged at a reduced temperature between about room temperature and about 100 DEG C. Thereafter, the casting is aged via at least one substantially isothermal aging at one or more elevated temperatures between about 150 DEG C. and about 240 DEG C.

Description

technical field [0001] Embodiments of the present invention generally relate to aluminum alloy high pressure die casting, and more particularly to methods of improving the mechanical properties of aluminum alloy high pressure die castings and methods of making aluminum alloy high pressure die castings in high pressure die casting and heat treatment processes . Background technique [0002] High pressure die casting (HPDC) processes are widely used for the mass production of metal parts due to the low cost of the process and the close dimensional tolerances (near net shape) and smooth surface finish they provide for castings made therefrom. For example, manufacturers in the automotive industry use HPDC to make near-net-shape aluminum alloy castings for engines, especially transmission applications. [0003] However, one disadvantage of the traditional HPDC process is that, for most high pressure die cast aluminum alloys, HPDC castings are generally not resistant to solution ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04
CPCC22F1/04C22C21/02C22C21/00C22F1/043
Inventor Q·王W·杨
Owner GM GLOBAL TECH OPERATIONS LLC