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Thermal treatment process and method for improving performance of aluminum alloy engine accessory

An aluminum alloy and engine technology, applied in the field of aluminum product processing, can solve the problems of reduced fracture toughness, increased peak strength, limited alloy application, etc., to achieve the effect of increasing yield strength, high toughness, and improving mechanical properties

Inactive Publication Date: 2018-02-27
徐州轩辕铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For high-strength aluminum alloys, as the content of main alloying elements such as Zn and Mg increases, the peak strength increases and the fracture toughness decreases, which limits the further application of the alloy.

Method used

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Embodiment 1

[0019] A heat treatment process and method for improving the performance of aluminum alloy engine accessories, the steps are as follows:

[0020] 1. The components of the aluminum alloy and the mass percent of each component are: Cu1.1%, Fe0.35%, Sr0.13%, Zn0.2%, Ga0.09%, other metal and non-metallic impurities The total amount of elements does not exceed 0.5%, and the rest is Al.

[0021] 2. A heat treatment process and method for improving the performance of aluminum alloy engine accessories, the steps are as follows:

[0022] ①Solution treatment: Dissolve alloying elements into the matrix in the form of solute atoms, and the solution treatment process is 480°C / 60 minutes.

[0023] ②Primary quenching treatment: The equilibrium solute atoms and equilibrium vacancies formed during solid solution treatment are retained in a supersaturated form until low temperature, the quenching medium is ice water or water at room temperature, and the quenching transfer time is less than 60 ...

Embodiment 2

[0027] A heat treatment process and method for improving the performance of aluminum alloy engine accessories, the steps are as follows:

[0028] 1. The components of the aluminum alloy and the mass percentages of each component are: Cu0.9%, Fe0.28%, Sr0.08%, Zn0.12%, Ga0.08%, other metal and non-metal impurities The total amount of elements does not exceed 0.5%, and the rest is Al.

[0029] 2. A heat treatment process and method for improving the performance of aluminum alloy engine accessories, the steps are as follows:

[0030] ①Solution treatment: the alloying elements are dissolved into the matrix in the form of solute atoms, and the solution treatment process is 460°C / 60 minutes.

[0031] ②Primary quenching treatment: The equilibrium solute atoms and equilibrium vacancies formed during solid solution treatment are retained in a supersaturated form until low temperature, the quenching medium is ice water or water at room temperature, and the quenching transfer time is le...

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Abstract

The invention discloses a thermal treatment process and method for improving the performance of an aluminum alloy engine accessory. The thermal treatment process and method are characterized in that the aluminum alloy is prepared from, by mass, 0.9% to 1.3% of Cu, 0.28% to 0.39% of Fe, 0.08% to 0.16% of Sr, 0.12% to 0.25% of Zn and 0.08% to 0.10% of Ga, and the total amount of other metal and non-metal impurities does not exceed 0.5%. The thermal treatment process comprises the steps that (1) solution treatment; (2) primary quenching treatment; (3) high-temperature short-time aging; and (4) secondary quenching treatment. According to the thermal treatment process and method for improving the performance of the aluminum alloy engine accessory, the aluminum alloy have good machining performance and a high thermal conducting coefficient, a modified and fined aluminum alloy structure is obtained, and the mechanical performance of the aluminum alloy is improved.

Description

technical field [0001] The invention relates to a heat treatment method for aluminum alloys, in particular to a heat treatment process and method for improving the performance of aluminum alloy engine accessories. The invention belongs to the technical field of aluminum product processing. Background technique [0002] For high-strength aluminum alloys, as the content of main alloying elements such as Zn and Mg increases, the peak strength increases and the fracture toughness decreases, which limits the further application of the alloy. In order to give full play to the strength advantages of ultra-high-strength aluminum alloys, it is necessary to improve their toughness properties at the same time. Both the cylinder block and cylinder head of the engine require materials with good thermal conductivity and strong corrosion resistance, and aluminum alloy has very prominent advantages in these aspects; but compared with steel structures, aluminum alloys are lacking in strengt...

Claims

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Application Information

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IPC IPC(8): C22C21/18C22F1/057
CPCC22C21/18C22F1/002C22F1/057
Inventor 魏昭然
Owner 徐州轩辕铝业有限公司
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