Heat treatment technology of high strength aluminium alloy

A technology of aluminum alloy and process, which is applied in the field of a heat treatment process of high-strength aluminum alloy, can solve the problems of poor corrosion resistance, insufficient strength reserve, high strength of aluminum alloy, etc., and achieve the effect of improving comprehensive mechanical properties and corrosion resistance

Inactive Publication Date: 2011-01-26
SICHUAN CITY TRACK TRAFFIC MATERIAL +1
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of Al-Zn-Mg-Cu aluminum alloy with high strength, insufficient strength reserve and poor corrosion resistance, adopting a three-stage aging process of step-by-step cooling to keep the alloy at a high tensile strength At the same time, it has good strength reserve and corrosion resistance

Method used

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  • Heat treatment technology of high strength aluminium alloy
  • Heat treatment technology of high strength aluminium alloy

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Experimental program
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Embodiment Construction

[0015] Experimental environment: room temperature

[0016] Experimental equipment: ordinary heat treatment furnace, quenching water tank (water temperature is room temperature)

[0017] Experimental material: 7A04 aluminum alloy (composition shown in Table 1), 70mm diameter bar

[0018] Table 17A04 Aluminum Alloy Composition

[0019]

[0020] The heat treatment process is divided into four steps:

[0021] The first step is to perform solid solution treatment on the 7A04 aluminum alloy, keep the temperature at 465-480 °C, put the sample in, start timing when it reaches the solid solution temperature, keep it warm for 1 hour, and then quickly water quench (the quenching transfer time does not exceed 0.5 min);

[0022] The second step is to carry out the first-stage artificial aging treatment on the 7A04 aluminum alloy, keep the furnace temperature at 160°C, put the sample in, start timing when it reaches the first-stage aging temperature, keep it warm for 15 minutes, and t...

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Abstract

The invention relates to a heat treatment technology of high strength aluminium alloy. The technology performs solution treatment, primary quenching treatment, high temperature short time aging treatment, secondary quenching treatment, intermediate temperate short time aging treatment and low temperature long time aging treatment to high strength aluminium alloy in sequence. The technology improves the comprehensive mechanical property of alloy, increases the corrosion resistance and expands the application range of high strength aluminium alloy.

Description

technical field [0001] The invention relates to a metal heat treatment process, in particular to a heat treatment process of a high-strength aluminum alloy. Background technique [0002] In recent years, Al-Zn-Mg-Cu high-strength wrought aluminum alloys have been widely used in the fields of aviation, aerospace, weapons and transportation, etc., especially for important structural parts that require high light weight, most of which are wrought aluminum alloys Manufactured and heat treated for high strength and toughness. [0003] Aging heat treatment can change the type, size, quantity and distribution of precipitates in aluminum alloys, thereby affecting the comprehensive mechanical properties and corrosion resistance of Al-Zn-Mg-Cu aluminum alloys. The characteristics of intragranular precipitates control the strength of the alloy. main factor. Intragranular precipitates are small in size and high in density and are not easily cut by dislocations, which is conducive to i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/053
Inventor 戴光泽徐磊宋继晓冯霞黄兴民韩靖赵君文莫尔遂
Owner SICHUAN CITY TRACK TRAFFIC MATERIAL
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