Quasicrystal-strengthened Mg-6Zn-3Y alloy with ultrafine solidification texture and preparation method thereof

A technology of solidification structure and quasicrystal, applied in the field of autogenous quasicrystal reinforced alloy and its preparation, can solve the problem of few reports of quasicrystal scale, and achieve the effect of good thermal stability and high performance

Inactive Publication Date: 2012-11-07
东北大学秦皇岛分校
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  • Abstract
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  • Application Information

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Problems solved by technology

[0008] To sum up, the technical content of the patent disclosed above is mainly about the magnesium-based spherical quasicrystalline master alloy prepared under ordinary solidification and rapid solidification con

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  • Quasicrystal-strengthened Mg-6Zn-3Y alloy with ultrafine solidification texture and preparation method thereof
  • Quasicrystal-strengthened Mg-6Zn-3Y alloy with ultrafine solidification texture and preparation method thereof

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Embodiment Construction

[0030] The technical solutions of the present invention are further described below through examples.

[0031] 1. In terms of melt mass percentage Wt%, weigh Mg: 91.0%, Zn: 6.0%, Y: 3.0%;

[0032] 2. Put the magnesium ingots, zinc ingots, and pure yttrium metal charges in the oven at 200°C for preheating and baking in a crucible with the above mass percentage;

[0033] 3. Set the heating temperature of the crucible resistance furnace to 780°C. When the temperature of the crucible rises to 380°C, add magnesium ingots and zinc ingots to the crucible, and start to feed CO2 / SF6 mixed gas as a protective gas, and continue to heat up. After the magnesium ingots and zinc ingots in the crucible are completely melted, add pure yttrium, stir for 2-5 minutes after the pure yttrium is completely melted, keep warm at 780°C for 10-15 minutes after the stirring is completed, and set aside;

[0034]4. Adjust the temperature of the Mg-Zn-Y alloy solution to 760°C, let it stand for 3 to 5 minu...

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Abstract

The invention discloses a quasicrystal-strengthened Mg-6Zn-3Y alloy with an ultrafine solidification texture and a preparation method thereof. The quasicrystal-strengthened Mg-6Zn-3Y alloy consists of the following chemical components in percentage by weight: 87.0 to 93.0 percent of Mg, 3.0 to 10.0 percent of Zn and 0.5 to 3.0 percent of Y. The Mg-6Zn-3Y alloy with the ultrafine solidification texture, which contains nanoscale granular quasicrystals, is prepared from normal-pressure as-cast Mg-Zn-Y alloy material under GPa-level ultrahigh pressure as solidification pressure, temperature and solidification cooling rate are controlled. The as-cast texture is characterized in that: the granular quasicrystals are evenly and dispersely distributed on the ultrafine Alpha-Mg matrix, wherein the secondary dendrite arm spacing between Alpha-Mg dendrites is 7Mu m to 10Mu m, the diameter of the granular quasicrystal is 50nm to 100nm, and the volume of the granular quasicrystals accounts for 25 to 35 percent of the total volume of the alloy. The invention adopts a cubic press, solidification process parameters are controlled, i.e., the solidification pressure is 6GPa, the solidification temperature is 1300DEG C, and the solidification rate is 300K/S. Theultrafin quasicrystal-strengthened Mg-6Zn-3Y alloy has high mechanical properties and good thermal stability.

Description

technical field [0001] The invention relates to an autogenous quasi-crystal reinforced alloy with superfine solidification structure and a preparation method thereof, in particular to a quasi-crystal reinforced Mg-6Zn-3Y alloy with superfine solidification structure and a preparation method thereof. Background technique [0002] Magnesium alloy has the characteristics of excellent electrical conductivity, thermal conductivity, electromagnetic shielding performance, high specific strength, specific stiffness, and shock absorption. It is currently the lightest metal structural material in practical application. and consumer electronics) and other industries have broad application prospects. However, due to the low strength, poor toughness, difficult plastic processing and poor high temperature creep performance of magnesium alloys, its further application in industry is limited. Therefore, improving the mechanical properties of magnesium alloys through various preparation tec...

Claims

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Application Information

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IPC IPC(8): C22C23/04C22F1/06
Inventor 董允林小娉郑润国周秀艳杨琳娟叶杰田莎莎
Owner 东北大学秦皇岛分校
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