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Heat treatment method for improving stress corrosion resistance of 7-series aluminum alloy

A heat treatment method and technology for corrosion performance, applied in heat treatment furnaces, heat treatment equipment, energy efficiency improvement and other directions, can solve the problems of manual feeding and poor corrosion resistance, and achieve the effect of improving strength, better corrosion resistance and high degree of automation

Active Publication Date: 2022-01-28
福建祥鑫新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to design a heat treatment method and a supporting heat treatment device for improving the stress corrosion resistance of 7 series aluminum alloys in view of the existing 7000 series aluminum alloys having poor corrosion resistance and existing heat treatment devices requiring manual feeding and retrieving.

Method used

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  • Heat treatment method for improving stress corrosion resistance of 7-series aluminum alloy
  • Heat treatment method for improving stress corrosion resistance of 7-series aluminum alloy
  • Heat treatment method for improving stress corrosion resistance of 7-series aluminum alloy

Examples

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Embodiment 1

[0052] Example 1 discloses a heat treatment method for improving the stress corrosion resistance of 7-series aluminum alloys, refer to the attached figure 1 , which includes the following six heat treatment steps:

[0053] 1) Natural aging: After the extruded material is cooled to room temperature, it is naturally aged for 48~72h at room temperature, and the room temperature is 10℃~45℃.

[0054] 2) First-level artificial aging: keep the extruded material treated in step 1 at a temperature of 110°C~130°C for 18~24h, and cool it with strong wind after it is released from the furnace. The cooling rate of the strong wind cooling in step 2 is controlled at 10~ 30°C / min.

[0055] 3) Primary solution treatment: The extruded material treated in step 2 is subjected to primary solution treatment at a temperature of 430°C to 450°C for 0.5 to 2 hours, and cooled in the furnace for 1 hour.

[0056] 4) Secondary solid solution treatment: The extruded material treated in step 3 is subjecte...

Embodiment 2

[0060] This Example 2 discloses a heat treatment device for improving the stress corrosion resistance of the 7-series aluminum alloy mentioned above. figure 2 , the heat treatment device includes an aging treatment chamber 100, a strong wind cooling device 200, a solution treatment chamber 300 and a quenching device 400 arranged in sequence from left to right, and the aging treatment chamber 100, the strong wind cooling device 200, the solution treatment chamber 300 and the quenching The four devices 400 are connected end to end.

[0061] Reference attached image 3 And attached Figure 4 , wherein the aging treatment chamber 100 and the solid solution treatment chamber 300 have basically the same structure, both of which include a heating cabinet 101 and a first conveyor 102 disposed through the heating cabinet. And the heating cabinet 101 is all made of a high-temperature-resistant inner bag and an external thermal insulation layer.

[0062] A gate 103 is provided on the...

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Abstract

The invention relates to the technical field of aluminum alloy heat treatment, and particularly discloses a heat treatment method for improving stress corrosion resistance of 7-series aluminum alloy, which comprises six steps of natural aging, first-stage artificial aging, first-stage solution treatment, second-stage solution treatment, second-stage artificial aging and third-stage artificial aging. The device comprises an aging treatment chamber, a strong wind cooling device, a solid solution treatment chamber and a quenching device which are sequentially arranged from left to right, according to the heat treatment method, the performance of the head and the tail of the material is more stable, the corrosion resistance is better, meanwhile, the whole heat treatment device can automatically achieve artificial aging, solution treatment, strong wind cooling and quenching treatment in the whole heat treatment process, auxiliary operation of operators is not needed in the whole process, The automation degree is high, and the using effect is excellent.

Description

technical field [0001] The invention relates to the technical field of heat treatment of aluminum alloys, and specifically discloses a heat treatment method for improving the stress corrosion resistance of 7 series aluminum alloys. Background technique [0002] The 7000-series aluminum alloy is an aluminum alloy with zinc as the main alloying element, which belongs to the aluminum alloy that can be strengthened by heat treatment, including AI-Zn-Mg alloy and AI-Zn-Mg-Cu alloy. Al-Zn-Mg alloy can obtain higher strength under appropriate heat treatment conditions, and has good welding performance. It is a strong weldable aluminum alloy and is widely used in high-speed trains and underwater weapons. Al-Zn-Mg-Cu alloy has higher strength than Al-Zn-Mg alloy and is called ultra-high strength aluminum alloy. It is widely used in aviation and aerospace fields and has become one of the most important structural materials in this field. The typical representative is 7055 , 7050, 707...

Claims

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Application Information

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IPC IPC(8): C22F1/053C21D9/00C21D1/10C21D1/62
CPCC22F1/002C22F1/053C21D9/0062C21D1/62C21D1/10Y02P10/25
Inventor 冯永平张建雷池海涛刘馥兵黄祯荣
Owner 福建祥鑫新材料科技有限公司
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