A variable temperature deformation process and subsequent processing method suitable for mg‑gd‑y alloys

A processing method and alloy technology are applied in the field of industrial magnesium alloys, which can solve the problems of less application of magnesium alloys, and achieve the effects of solving incomplete deformation and improving recrystallization ability.

Active Publication Date: 2017-04-19
GRIMAT ENG INST CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the main alloying elements of Mg-Gd-Y series alloys are Gd and Y, and a small amount of other alloying elements are added. Gd-Y has a large solid solubility in magnesium alloys, which can produce solid solution aging strengthening effects. , which combines variable temperature treatment, solution aging and alloy deformation, is rarely used in magnesium alloys

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  • A variable temperature deformation process and subsequent processing method suitable for mg‑gd‑y alloys

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Effect test

Embodiment 1

[0058] Embodiment 1 Diameter is the Mg-7Gd-5Y-1.5Nd-0.6Zr alloy deformation and subsequent processing method of 500mm

[0059] Homogenization treatment: heat the alloy ingot to 420°C and keep it for 6h; then raise the temperature to 500°C and keep it for 10h; continue to heat up to 540°C and keep it for 40h. Alloy cooling treatment: lower the alloy temperature to 500°C and keep it warm for 8 hours. Alloy deformation: The deformation method is direct extrusion after three-way forging. Alloy heating and solid solution: the alloy is heated to 530°C and kept for 10 hours. Alloy cooling treatment: cooling the alloy to 520°C and keeping it warm for 8 hours. Alloy deformation: the alloy is deformed again, and the deformation method is rolling. Subsequent processing method: Alloy quenching and water-cooling the rolled plate immediately, pre-stretch the plate by 2% by volume to eliminate residual stress, and then age the alloy at 220°C for 8 hours.

[0060] The implementation of th...

Embodiment 2

[0061] Embodiment 2 The deformation and follow-up processing method of Mg-8Gd-3Y-1Zn-0.6Zr alloy with a diameter of 200mm

[0062] Homogenization treatment: heat the alloy to 530°C and keep it warm for 24h. Alloy cooling treatment: lower the alloy temperature to 500°C and keep it warm for 10h. Alloy deformation: The alloy deformation method is rolling after extrusion. Alloy heating and solid solution: the alloy is heated to 530°C and kept for 4 hours. Alloy cooling treatment: cool the Mg-Gd-Y alloy to 500°C and keep it warm for 10 hours. The alloy continues to deform: the deformation method is rolling. Subsequent processing method: Quenching and water-cooling the deformed horse alloy, pre-stretching 3% to eliminate residual stress, and then aging the alloy at 225°C for 24h.

[0063] The implementation of the present invention can effectively improve the recrystallization ability of the alloy, the grain size after deformation is 5-10 μm, the fracture strength can reach up t...

Embodiment 3

[0064] Embodiment 3 The deformation and subsequent processing method of Mg-9Gd-4Y-2Zn-0.5Zr alloy with a diameter of 300mm

[0065] Homogenization treatment: heat the alloy to 535°C for 36h. Alloy cooling treatment: lower the alloy temperature to 520°C and keep it warm for 12h. Alloy deformation: The deformation method is rolling after extrusion. Alloy heating and solid solution: the alloy is heated to 530°C and kept for 4 hours. Subsequent processing method: immediately quench and water-cool the alloy after solid solution, pre-stretch 2% to eliminate residual stress, and then age the alloy at 240°C for 18 hours.

[0066] The implementation of the invention can effectively improve the alloy strength and weaken the alloy texture.

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Abstract

The invention relates to a temperature-changing deformation technology for a My-Gd-Y alloy and a subsequent processing method. The technology comprises the following specific steps: uniformization (divided into primary uniformization and periodical uniformization according to sizes), cooling, deformation, warming and solid solution, and subsequent processing. After treated by the above technology, strength of the alloy is greatly increased, grain size is obviously minimized, and the texture is weakened.

Description

technical field [0001] The invention relates to a processing method suitable for Mg-Gd-Y series magnesium alloys, belonging to the category of industrial magnesium alloys. Among them, the Mg-Gd-Y alloy mainly refers to the Gd-Y element as the main alloy element, and a small amount of other alloy elements are added, and the mass percentage of the Gd-Y element is 5% of the sum of other alloy elements (except magnesium). ~20 times. Background technique [0002] Mg-Gd-Y series alloys, as one of the most promising magnesium alloy systems, are sought after by domestic and foreign researchers. Because of their good formability and excellent mechanical properties, they are considered to be available in some special cases. Applied high performance magnesium alloy. At present, the application of magnesium alloys in the aerospace field is still in a vigorous development stage. Applying large magnesium alloy structural parts to aerospace devices can effectively reduce weight and impro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/06
CPCC22F1/06
Inventor 马鸣龙张奎李兴刚李永军石国梁廖洪彬屈娟
Owner GRIMAT ENG INST CO LTD
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