A method for controlling the orientation of precipitated phases in magnesium alloys
A magnesium alloy and precipitated phase technology, which is applied in the field of adjusting the orientation of precipitated phases in magnesium alloys, can solve the problems of small basal plane dislocation movement hindrance, difficult control of precipitated phase orientations in magnesium alloys, and poor age hardening effect, etc. Production cost, suitable for large-scale industrial production, maximize the effect of pinning
Active Publication Date: 2020-09-01
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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Problems solved by technology
[0006] In view of this, the present invention provides a method for regulating the orientation of precipitated phases in magnesium alloys in order to solve the problems in the prior art that the orientation of precipitated phases in magnesium alloys is difficult to control, the movement of basal plane dislocations is less hindered, and the effect of age hardening is not good. , the mechanical properties of the magnesium alloy obtained by this control method are significantly improved
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Embodiment 1
[0029] A method for regulating the orientation of precipitated phases in a magnesium alloy, comprising the following steps:
[0030] A. The magnesium alloy ingot whose composition is Mg-6Zn (wt%) and whose size is Φ85×10mm is solid solution treated, and the magnesium alloy ingot after the solution treatment is cooled to room temperature to remove the head and tail of the wagon to remove the surface of the magnesium alloy ingot The oxide layer ensures that the magnesium alloy ingot is pure and free of impurities. The magnesium alloy ingot after solution treatment is hot extruded into extruded rods, wherein the solution treatment temperature is 420°C, the solution time is 20h, and the hot extrusion temperature of the magnesium alloy ingot after solution treatment is 300°C , before extrusion, keep the extrusion temperature for 40 minutes. After the insulation, the magnesium alloy ingot is hot-extruded at the speed of 2.5cm / s in the extruder, and the diameter of the extruded rod i...
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Abstract
The invention belongs to the field of metal processing reinforcement, and relates to an adjusting and controlling method for orientation of precipitation phase in magnesium alloy. The adjusting and controlling method comprises the main process steps of 1, the solid-soluble treatment of magnesium alloy ingots; 2, magnesium alloy hot extrusion into rod; 3, stress aging extending rod preparing and stress relief annealing conducting; and 4, stress aging treatment. By means of the adjusting and controlling method, the pull stress along the c axis of a crystal or the pressure stress perpendicular tothe c axis of the crystal is applied in the aging process, the size of stress is 60-80% of the yield strength at the corresponding aging temperature, the solute atom forms a cylinder precipitate phase during precipitation, the misalignment of the substrate is pinned more effectively, and the mechanical properties of the magnesium alloy is improved; and the adjusting and controlling method is simple in operating step, significant in effect and more suitable for large-scale industrial production.
Description
technical field [0001] The invention belongs to the technical field of metal strengthening, and relates to a method for controlling the orientation of precipitated phases in magnesium alloys. Background technique [0002] Magnesium alloy has the characteristics of high specific strength, excellent rigidity, and low density. It is known as a green, recyclable and clean material that does not pollute the environment in the 21st century. In recent years, the demand for magnesium alloys in the fields of aerospace, 3C electronic products and military industry has been increasing, and it is imminent to continuously improve the mechanical properties of magnesium alloys. Precipitation strengthening is a commonly used magnesium alloy strengthening method. The basic process is to make the magnesium alloy in a supersaturated state of solute atoms, and then perform aging treatment at a certain temperature. During this process, the solute atoms precipitate to form precipitates to hinder ...
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IPC IPC(8): C22F1/06
CPCC22F1/06
Inventor 王永建钟丽萍豆雨辰
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING