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Corrosion-resistant high-performance wrought magnesium alloy and preparation method thereof

A wrought magnesium alloy, high-performance technology, applied in the field of magnesium alloy materials, to achieve the effects of excellent corrosion resistance, easy availability of equipment, and improved corrosion resistance

Active Publication Date: 2020-01-03
SOUTHWEST UNIVERSITY
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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 provide a magnesium alloy material with high strength, high plasticity and excellent corrosion resistance and its preparation method

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  • Corrosion-resistant high-performance wrought magnesium alloy and preparation method thereof
  • Corrosion-resistant high-performance wrought magnesium alloy and preparation method thereof

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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 ºC Add the Mg-Yb high-purity master alloy (the impurity content is not higher than 1wt.%) with the Yb content of the final smelted alloy design mass percentage content of 2.0%, and use the spiral electromagnetic field to continuously stir for 10 minutes, and then let it stand at 730 ºC after melting Keep it warm for 30 minutes to remove the slag, then pour it out of the furnace and cool it down to room temperature naturally.

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

[0030] Reheat the billet after solut...

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 ºC Add the Mg-Yb high-purity master alloy (the impurity content is not higher than 1wt.%) whose Yb content is 1.8% of the final smelted alloy design mass percentage content, stir continuously for 10 min using a spiral electromagnetic field, and stand at 730 ºC after melting Keep it warm for 30 minutes to remove the slag, then pour it out of the furnace and cool it down to room temperature naturally.

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

[0035] Reheat the billet after solution treatment to 280 °C, an...

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Abstract

The invention discloses a corrosion-resistant high-performance wrought magnesium alloy and a preparation method thereof. The preparation method comprises the steps of alloy smelting, solid solution and hot extrusion. Firstly, a ZK60 magnesium alloy containing a rare earth element ytterbium (Yb) with the mass percent of 1.8% to 2.1% is smelted according to ingredients, then solid solution treatmentis carried out on the ZK60 magnesium alloy for 450 DEG C*24 h in protection gas, and hot extrusion is carried out at the temperature of 250 DEG C to 320 DEG C with the strain rate of 0.005 s<-1> to 0.01 s<-1> and the extrusion ratio of 32-40. The tensile strength of the finally obtained ZK60 alloy is 400-450 MPa, the ductility ranges from 10% to 20%, and compared with a commercialized ZK60 alloy,the corrosion current density can be reduced by 1-2 magnitudes orders. According to the corrosion-resistant high-performance wrought magnesium alloy and the preparation method thereof, a wrought magnesium alloy material prepared through a conventional process is utilized, high strength and high plasticity are achieved, excellent corrosion resistance is achieved, and the corrosion-resistant high-performance wrought magnesium alloy can be adopted as a ideal alternative to aerospace, weapon, 3C and biomedical materials.

Description

technical field [0001] The invention relates to the field of magnesium alloy materials, in particular to a deformed magnesium alloy with good corrosion resistance and good mechanical properties and a preparation method thereof. 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 puri...

Claims

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Application Information

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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 UNIVERSITY
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