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Preparation method of magnesium alloy reinforced by nano-quasi-crystal particles

A technology for strengthening magnesium alloys and quasicrystals, which is applied in the field of alloys, can solve problems such as particle size, distribution changes, coarseness, and unfavorable mechanical properties of alloys, and achieve high nucleation energy storage, microstructure refinement, and microstructure refinement. Effect

Active Publication Date: 2014-04-09
北京二七铁丰龙科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the I-phase in the cast alloy is too coarse, which is not conducive to significantly improving the mechanical properties of the alloy
Thermal deformation and other mechanical processing methods can break the coarse I-phase, but the change of its particle size and distribution is limited

Method used

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  • Preparation method of magnesium alloy reinforced by nano-quasi-crystal particles

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Experimental program
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Effect test

Embodiment 1

[0023] Taking the Mg-6Zn-1Er alloy as an example, firstly, solid solution treatment at 420°C, grinding, and processing were performed to obtain magnesium alloy chips, and multiple cycles of plastic deformation equipment (model: 100AF-AB[F-0563], purchased from Japan ) The alloy is subjected to multiple cyclic plastic deformation processing methods, the number of cycles is 100, and an extrusion blank is obtained, and then a vertical extruder is extruded at a temperature of 250° C. to obtain an extruded alloy. The size of the nano-quasicrystal particles in the alloy is 10-100nm. The tensile strength of the extruded alloy is 312MPa, the yield strength is 193MPa, and the elongation is 6.8%.

Embodiment 2

[0025] Taking the Mg-6Zn-1Er alloy as an example, firstly, solid solution treatment at 400°C, grinding, and processing are performed to obtain magnesium alloy chips, and the extrusion blank is obtained after multiple cycles of plastic deformation for 300 times. , and then use a vertical extruder to extrude it at a temperature of 250° C. to obtain an extruded alloy. The size of the nano-quasicrystal particles in the alloy is 10-100nm, such as figure 1 shown. Its tensile strength is 337MPa, yield strength is 237MPa, and elongation is 5.1%.

Embodiment 3

[0027] Taking Mg-6Zn-1.5Er alloy as an example, firstly, solution treatment at 450°C, cold rolling, each deformation amount is about 5%, rolling 15 times, and then the plate is made, and the plate is annealed at 350°C for 15 minutes. The size of the nano-quasicrystal particles in the alloy is 10-100nm. Measure its tensile properties, the tensile strength and yield strength in the parallel rolling direction are 341MPa and 233MPa respectively, and the elongation is 8.0%.

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Abstract

The invention discloses a magnesium alloy reinforced by nano-quasi-crystal particles and a preparation method of the alloy, and belongs to the technical field of alloy. The alloy comprises the following components in percentage by mass: Er not higher than 10%, Zn not higher than 10%, impurity element with total amount less than 0.05%, and balance of magnesium, wherein the mass ratio of Zn to Er is 4-8. The preparation method comprises the following steps: firstly performing solution treatment to the selected alloy, cleaning the alloy, removing impurities and crushing the alloy; utilizing a multi-cyclic plastic deformation device to process the alloy, at last obtaining an extrusion blank, and extruding the blank with an extruder at 220-350 DEG C to obtain a bar; or utilizing a rolling mill to roll the alloy at a temperature not higher than 300 DEG C, and annealing the rolled alloy. According to the invention, the size of phase I in the alloy is effectively reduced; the distribution characteristics of phase I are reasonably changed; and the size of phase I in the alloy is about 10-100nm.

Description

technical field [0001] The invention relates to a magnesium alloy reinforced with nano-quasicrystal particles and a preparation method thereof, in particular to a new method and a new process for preparing the alloy, and belongs to the field of alloy technology. Background technique [0002] So far, magnesium alloy has the lowest density among metal structural materials and is the third type of metal structural material developed after steel and aluminum alloys. It is called the green engineering material of the 21st century. With the depletion of many metal mineral resources, magnesium has been paid more and more attention due to its rich resources, especially the lightweight structure, energy saving and environmental protection issues have stimulated the development of the magnesium industry. Mg-Zn binary alloy is a relatively common type of alloy. However, the alloy has coarse grains, low mechanical properties, poor plastic workability, and serious hot cracking tendency, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/04C22F1/06
Inventor 刘轲杜文博王庆峰王朝辉李淑波
Owner 北京二七铁丰龙科技有限公司
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