High-strength magnesium alloy sectional material as well as preparation process and application

A preparation process, magnesium alloy technology, applied in the field of aviation containers, high-strength magnesium alloy profiles and its preparation process and application field, can solve the problem that deformed magnesium alloy products have not found a huge application market, and achieve high comprehensive room temperature The effects of mechanical properties and plasticity, high efficiency, and simple preparation process

Active Publication Date: 2019-01-11
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, no advantageous wrought magnesium alloy plastic processing technology system has been formed, and there are still serious deficiencies in product development and application. Wrought magnesium alloy products have not yet found a huge application market.

Method used

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  • High-strength magnesium alloy sectional material as well as preparation process and application
  • High-strength magnesium alloy sectional material as well as preparation process and application
  • High-strength magnesium alloy sectional material as well as preparation process and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0069] The preparation process of the high-strength magnesium alloy profile has the same advantages as the above-mentioned high-strength magnesium alloy profile.

[0070] In a preferred embodiment, a typical temperature-varying homogenization treatment includes: raising the temperature from room temperature to 200-300°C and keeping it for 2-4h; then raising the temperature to 410-480°C and keeping it for 6-15h; then raising the temperature to 520- After holding at 530°C for 8-10 hours; cooling to 400-480°C with the furnace, and then cooling rapidly at a cooling rate of 3-40°C / s.

[0071]The variable temperature homogenization treatment includes four stages: the first homogenization treatment stage: the temperature is raised from room temperature to 200-300 ° C, and kept for 2-4 hours; room temperature refers to the ambient temperature under heating conditions, and the heating temperature includes but is not limited to 200 °C, 250°C or 300°C; holding time includes but not limit...

Embodiment 1

[0098] The products produced are magnesium alloy I-beam profiles.

[0099] A magnesium alloy extrusion forming process, comprising the following steps:

[0100] (1) The temperature-varying homogenization treatment of magnesium alloy ingots includes: charging with the furnace, raising the temperature from room temperature to 200°C within 30 minutes, and holding it for 4 hours; then raising the temperature to 410°C within 40 minutes, holding it for 15 hours; and then heating up within 30 minutes Keep warm for 10 hours after reaching 520°C; then close the furnace, cool down to 400°C with the furnace, rapidly cool at a rate of 3°C / s, and take it out;

[0101] The magnesium alloy ingot includes the following components in mass percentage: Gd 9%, Y 5%, Zn 1.5%, Mn 1.5%, and the balance is Mg and unavoidable impurities;

[0102] (2) Preheat the pure magnesium ingot, magnesium alloy ingot, extrusion cylinder and extrusion die; is 450°C;

[0103] (3) The preheated extrusion die is s...

Embodiment 2

[0107] The products produced are magnesium alloy profiles.

[0108] A magnesium alloy extrusion forming process, comprising the following steps:

[0109] (1) The temperature-changing and homogenizing treatment of magnesium alloy ingots includes: charging with the furnace, heating from room temperature to 300°C within 30 minutes, and holding for 2 hours; then raising the temperature to 480°C within 40 minutes, holding for 6 hours; and then heating up within 30 minutes Keep warm for 8 hours after reaching 530°C; then close the furnace, cool down to 460°C with the furnace, rapidly cool at a rate of 40°C / s, and take it out;

[0110] The magnesium alloy ingot includes the following components in mass percentage: Gd 8%, Y 6%, Zn 1.2%, Mn 1.2%, and the balance is Mg and unavoidable impurities;

[0111] (2) Preheat pure magnesium ingots, magnesium alloy ingots, extrusion cylinders and extrusion dies; the preheating temperature of pure magnesium ingots, magnesium alloy ingots and extr...

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Abstract

The invention discloses a high-strength magnesium alloy sectional material as well as a preparation process and an application, relating to the forming technical field of the high-strength magnesium alloy. A strengthening phase in the high-strength magnesium alloy sectional material with an extrusion state mainly comprises a LPSO phase and a Beta phase, wherein the volume fraction of the LPSO phase is 1-40%; the volume fraction of Beta phase is 1-20%; A strengthening phase in the high-strength magnesium alloy sectional material with an aging state mainly comprises the LPSO phase, the Beta phase, a Beta's phase and a Gamma's phase, wherein the volume fraction of the LPSO phase is 1-40%; the volume fraction of the Beta phase is 1-20%; the number density of Beta's phase is 1015-1025m-3; the slenderness ratio l / d is 1-20; the number density of Gamma's phase is 1014-1024m-3; the slenderness ratio l / d is 1-50. With advantages of high comprehensive room-temperature mechanical property and better plasticity, the magnesium alloy sectional material provided by the invention can be applied to the production of aircraft containers.

Description

technical field [0001] The invention relates to the technical field of high-strength magnesium alloy forming, in particular to a high-strength magnesium alloy profile and its preparation process and application, mainly in the field of aviation containers. Background technique [0002] Lightweight is a global development trend, which has important strategic significance for alleviating the energy crisis and reducing pollution. Magnesium alloy has the characteristics of light specific gravity, high specific strength, excellent shock absorption and noise reduction, and electromagnetic shielding performance. It is one of the most potential lightweight materials and is widely used in aviation, aerospace, national defense, automobiles, communication electronics, computers and Household appliances and other industrial fields, known as "21st century green environmental protection engineering materials". However, the current application of magnesium alloys is far less than that of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06C22F1/06
CPCC22C23/06C22F1/06
Inventor 王敬丰王奎刘世杰彭星潘复生
Owner CHONGQING UNIV
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