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A corrosion-resistant high-performance deformed magnesium alloy and its preparation method

A deformed magnesium alloy, high-performance technology, applied in the field of magnesium alloy materials, to achieve the effect of improving corrosion resistance, promoting uniform corrosion mode, and improving corrosion resistance

Active Publication Date: 2021-06-25
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to overcome the technical disadvantages of preparing corrosion-resistant high-performance deformed magnesium alloys in the above-mentioned background technology, and to provide a method for preparing magnesium alloy materials with high strength, high plasticity and excellent corrosion resistance

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  • A corrosion-resistant high-performance deformed magnesium alloy and its preparation method
  • A corrosion-resistant high-performance deformed magnesium alloy and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0028] In this embodiment, the N 2 + 0.15% HFC-125 (vol.%) under the protection of mixed gas, smelt high-purity ZK60 magnesium alloy ingredients according to the normal smelting process (the impurity content of each component is not higher than 1wt.%), after fully dissolving, at 780 ° C Add a Mg-Yb high-purity master alloy (impurity content not higher than 1wt.%) whose Yb content is the final smelted alloy design mass percentage content of 2.0%, use a spiral electromagnetic field to continuously stir for 10 minutes, and keep it at 730°C after melting After 30 minutes to remove the slag, it was poured out of the furnace and cooled naturally to room temperature.

[0029] Subsequently, the ingot was subjected to heat preservation treatment at 450°C×24h in argon gas, and then water-cooled to room temperature to ensure that the second phase was fully re-dissolved into the matrix and the crystal grains were not overheated or burned.

[0030] Reheat the billet after solid solution t...

Embodiment 2

[0033] In this embodiment, the N 2 + 0.15% HFC-125 (vol.%) under the protection of mixed gas, smelt high-purity ZK60 magnesium alloy ingredients according to the normal smelting process (the impurity content of each component is not higher than 1wt.%), after fully dissolving, at 780 ° C Add a Mg-Yb high-purity master alloy (impurity content not higher than 1wt.%) whose Yb content is the final smelted alloy design mass percentage content of 1.8%, use the spiral electromagnetic field to continuously stir for 10min, and keep it at 730°C after melting After 30 minutes to remove the slag, it was poured out of the furnace and cooled naturally to room temperature.

[0034] Subsequently, the ingot was subjected to heat preservation treatment at 450°C×24h in argon gas, and then water-cooled to room temperature to ensure that the second phase was fully re-dissolved into the matrix and the crystal grains were not overheated or burned.

[0035] Reheat the blank after solid solution treatme...

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Abstract

The invention discloses a method for preparing a corrosion-resistant high-performance deformed magnesium alloy. The steps include alloy smelting→solid solution→hot extrusion; firstly, ZK60 magnesium alloy containing 1.8-2.1% rare earth element ytterbium (Yb) is smelted according to the composition , followed by solid solution treatment at 450℃×24h in protective gas, and then at 250~320℃ for 0.005~0.01s ‑1 The strain rate and the extrusion ratio of 32-40 were hot-extruded. The tensile strength of the finally obtained wrought magnesium alloy is 400-450MPa, the elongation is 10-20%, and the corrosion current density can be reduced by 1-2 orders of magnitude compared with the commercialized ZK60 alloy. The deformed magnesium alloy material prepared by the conventional process in the present invention has high strength plasticity and excellent corrosion resistance, and can be used as an ideal candidate for aerospace, weapon, 3C and biomedical materials.

Description

technical field [0001] The invention relates to the field of magnesium alloy materials, in particular to a method for preparing a deformed magnesium alloy with good corrosion resistance and mechanical properties. Background technique [0002] Magnesium alloys have broad application prospects in aerospace, weapon manufacturing, 3C products, and biomedical fields due to their high specific strength, specific stiffness, good thermal conductivity, electromagnetic shielding performance, and biological safety. However, magnesium alloys have insufficient strong plasticity and poor corrosion resistance, which seriously restrict their wide application. [0003] In recent years, the methods of multi-element microalloying, heat treatment and severe plastic deformation have been commonly used at home and abroad to prepare high-performance wrought magnesium alloys. Multi-component microalloying reduces the content of slag inclusions and impurity elements through melt purification method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/03C22F1/06
CPCC22C1/03C22C23/00C22F1/06
Inventor 李路吕颢黄楚疌王涛王雨张存才程南璞
Owner SOUTHWEST UNIV
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