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Heat treatment method of aluminum magnesium alloy

A heat treatment method and aluminum-magnesium alloy technology, applied in the field of alloy heat treatment, can solve problems such as unfavorable extrusion and product performance stability, restrictions on the development and application of large-size profiles, uneven heating of aluminum-magnesium alloys, etc., to achieve excellent corrosion resistance and Effects of mechanical properties, shortening of processing time, and improvement of dimensional stability

Active Publication Date: 2016-08-10
贵州航天风华精密设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, during the heat treatment process of aluminum-magnesium alloys with larger diameters, due to the long time required for heating to the core of the alloy, the aluminum-magnesium alloys are heated unevenly during the heat treatment process, and finally lead to different structures in different parts of the alloy, and thus different parts. Conducive to extrusion and product performance stability
The problem of uneven heating in the heat treatment of aluminum-magnesium alloys greatly restricts the specifications of alloys that can be strengthened by heat treatment in the prior art, thus limiting the development and application of large-sized profiles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A heat treatment method for an aluminum-magnesium alloy for an aerospace vehicle, comprising the following steps:

[0029] (1) Put the aluminum-magnesium alloy into a vacuum heat treatment furnace, raise the temperature to 205°C at a heating rate of 9°C / min, keep it warm for 1h, then raise the temperature to 620°C at a heating rate of 10°C / min, and keep it warm for 0.5h, Then cool down to 510°C at a cooling rate of 10°C / min, and keep warm for 2 hours; the vacuum working pressure is ≤0.65Pa;

[0030] (2) After completing the vacuum heat treatment, spray coolant, and cool with a cooling rate of 60° C. / s; the weight percentages of each component of the coolant are: ethylene glycol 55%; silicate 1%; seabenzoic acid 0.5% ; Fluoride 0.1%; Alkylamide 0.3%; Polyol ester 0.4%; Sodium alginate 0.2%; Defoamer 0.3%; The balance is deionized water;

[0031] (3) heat the aluminum-magnesium alloy obtained in step (2) for 1 hour at 380° C., and perform single-pass deformation at the h...

Embodiment 2

[0035] A heat treatment method for aluminum-magnesium alloy thin-walled components, comprising the following steps:

[0036] (1) Put the aluminum-magnesium alloy into a vacuum heat treatment furnace, raise the temperature to 180°C at a heating rate of 10°C / min, keep it for 2 hours, then raise it to 605°C at a heating rate of 13°C / min, and hold it for 0.5h, Then cool down to 495°C at a cooling rate of 15°C / min, and keep warm for 1h; the vacuum working pressure is ≤0.65Pa;

[0037] (2) After completing the vacuum heat treatment, spray coolant, and cool with a cooling rate of 80°C / s; the weight percentages of each component of the coolant are: ethylene glycol 70%; silicate 3%; seabenzoic acid 1.8% ; Fluoride 0.01-1.5%; Alkylamide 0.1%; Polyol ester 0.8%; Sodium alginate 0.1%; Defoamer 0.25%; The balance is deionized water;

[0038] (3) heat the aluminum-magnesium alloy obtained in step (2) for 1.5 hours at 365° C., and perform single-pass deformation at the heat preservation tem...

Embodiment 3

[0042] A heat treatment method for an aluminum-magnesium alloy equipped with heavy-duty high-speed trains, comprising the following steps:

[0043] (1) Put the aluminum-magnesium alloy into a vacuum heat treatment furnace, raise the temperature to 210°C at a heating rate of 8°C / min, keep it for 2 hours, then raise it to 600°C at a heating rate of 15°C / min, and keep it for 0.5h, Then cool down to 505°C at a cooling rate of 17°C / min, and keep warm for 3 hours; the vacuum working pressure is ≤0.65Pa;

[0044] (2) After completing the vacuum heat treatment, spray coolant, and cool with a cooling rate of 50°C / s; the weight percentages of each component of the coolant are: ethylene glycol 25%; silicate 4%; seabenzoic acid 2% ; Fluoride 0.01-1.5%; Alkylamide 0.05%; Polyol ester 0.6%; Sodium alginate 0.25%; Defoamer 0.2%; The balance is deionized water;

[0045] (3) heat the aluminum-magnesium alloy obtained in step (2) for 1 hour at 380° C., and perform single-pass deformation at th...

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Abstract

The invention relates to the technical field of heat treatment of alloy, in particular to a heat treatment method of aluminum magnesium alloy. The heat treatment method comprises the following steps: placing the aluminum magnesium alloy in a vacuum heat treatment furnace at first; controlling the temperature to be 490-510 DEG C along with the temperature of the furnace in a mode of heating and then cooling; cooling after insulation is finished; placing the aluminum magnesium alloy in an environment at the temperature of 360-380 DEG C and insulating for 1-2 hours; carrying out single-pass deformation at the insulating temperature, wherein deformation is 25-45%; then carrying out cold rolling, wherein the rolling speed is 0.08-0.25 m / s, and reduction in cold rolling is 30+ / -5%; and finally cooling the aluminum magnesium alloy in air until the temperature of the aluminum magnesium alloy reaches room temperature. The heat treatment method is simple to operate and easy to implement; and the machining time is shortened. The aluminum magnesium alloy treated by the method has the characteristics of dimensional stability, corrosion resistance, mechanical property and excellent extrusion performance, and further has the advantage that the strength of the aluminum magnesium alloy is reasonably matched with plasticity.

Description

technical field [0001] The invention relates to the technical field of alloy heat treatment, in particular to a heat treatment method for an aluminum-magnesium alloy. Background technique [0002] Aluminum-magnesium alloy is an alloy in which magnesium metal is added to aluminum alloy. It has a series of advantages such as high strength and rigidity, light weight, easy processing, and easy recycling. It is widely used in aerospace, transportation, petroleum, etc. Chemical industry, rail transit, consumer electronics and other fields, despite this, my country's aluminum-magnesium alloy products are still difficult to meet the manufacturing of high-end equipment, and most of the parts of my country's high-end equipment are imported from abroad, and these imported parts are The aluminum-magnesium alloy products exported from my country at a low price are used as primary raw materials, and processed by high-end technology to produce high value-added products. Therefore, research o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/047C22F1/02C22C21/08C22C21/06
CPCC22C21/06C22C21/08C22F1/002C22F1/02C22F1/047
Inventor 李翔光于丹敖四海王昌明俞开升
Owner 贵州航天风华精密设备有限公司
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