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Ageing strengthening magnesium alloy with evenly-distributed granular quasi crystals and rod-like phases and preparation method

A technology of uniform distribution and aging strengthening, applied in the field of alloys, to achieve the effects of simple steps, easy control of conditions and good thermal stability

Active Publication Date: 2016-09-14
东北大学秦皇岛分校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Granular quasicrystals and rod-like β′ are uniformly dispersed on the magnesium matrix 1 -MgZn 2 Phase age strengthening of Mg-Zn-Y alloys has not been reported in related reports

Method used

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  • Ageing strengthening magnesium alloy with evenly-distributed granular quasi crystals and rod-like phases and preparation method
  • Ageing strengthening magnesium alloy with evenly-distributed granular quasi crystals and rod-like phases and preparation method
  • Ageing strengthening magnesium alloy with evenly-distributed granular quasi crystals and rod-like phases and preparation method

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Experimental program
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Effect test

Embodiment 1

[0035] An age-strengthened magnesium alloy with evenly distributed granular quasicrystals and rod-like phases is a Mg-Zn-Y alloy, in which Mg: 89wt.%~93wt.%, Zn: 6wt.%~8wt.%, Y: 1wt.%~3wt .%.

[0036] A method for preparing an aging-strengthened magnesium alloy with uniformly distributed granular quasicrystals and rod-like phases, specifically comprising the following steps:

[0037] S1, the preparation of as-cast Mg-Zn-Y alloy material:

[0038] S1.1. Weigh magnesium ingots, zinc ingots and Mg-30Y master alloy, preheat and bake, and set aside;

[0039] S1.2. When the temperature of the crucible is raised to the previous temperature in the crucible resistance furnace, add the magnesium and zinc ingots treated in S1.1, pass through the protective gas, continue to heat up until the magnesium and zinc ingots are melted, and then add S1 . The Mg-30Y master alloy treated in 1 is stirred for 2-5 minutes after the Mg-30Y master alloy is melted. After the stirring is completed, it i...

Embodiment 2

[0043] The age-strengthened magnesium alloy with evenly distributed granular quasicrystals and rod-like phases is a Mg-Zn-Y alloy, wherein Mg: 89wt.%, Zn: 8wt.%, Y: 3wt.%. In the alloy, rod-like β is uniformly and dispersedly distributed on the magnesium matrix 1 '-MgZn 2 and granular icosahedral quasicrystalline phase, the solid solubility of Zn element in the magnesium matrix is ​​>6wt.%.

[0044] A method for preparing an aging-strengthened magnesium alloy with uniformly distributed granular quasicrystals and rod-like phases, specifically comprising the following steps:

[0045] S1, the preparation of as-cast Mg-Zn-Y alloy material:

[0046] S1.1. Weigh magnesium ingots, zinc ingots and Mg-30Y master alloy with a mass ratio of 89︰8︰9, preheat and bake at 200°C, and set aside;

[0047] S1.2. When the temperature of the crucible is raised to 350°C in the crucible resistance furnace, add the magnesium ingots and zinc ingots treated in S1.1, and introduce CO 2 / SF 6 The mi...

Embodiment 3

[0051] The age-strengthened magnesium alloy with evenly distributed granular quasicrystals and rod-like phases is a Mg-Zn-Y alloy, wherein Mg: 93wt.%, Zn: 6wt.%, Y: 1wt.%. In the alloy, rod-shaped β′ is uniformly and dispersedly distributed on the magnesium matrix 1 -MgZn 2 and granular icosahedral quasicrystalline phase, the solid solubility of Zn element in the magnesium matrix is ​​>6wt.%.

[0052] A method for preparing an aging-strengthened magnesium alloy with uniformly distributed granular quasicrystals and rod-like phases, specifically comprising the following steps:

[0053] S1, the preparation of as-cast Mg-Zn-Y alloy material:

[0054] S1.1. Weigh magnesium ingots, zinc ingots and Mg-30Y master alloy with a mass ratio of 93︰6︰3, preheat and bake at 200°C, and set aside;

[0055] S1.2. When the temperature of the crucible is raised to 400°C in the crucible resistance furnace, add the magnesium ingots and zinc ingots treated in S1.1, and introduce CO 2 / SF 6 The ...

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Abstract

The invention discloses an ageing strengthening magnesium alloy with evenly dispersed and distributed granular quasi crystals and rod-like phases. The ageing strengthening magnesium alloy is an Mg-Zn-Y alloy, wherein the content of Mg ranges from 89 wt.% to 93 wt.%, the content of Zn ranges from 6 wt.% to 8 wt.%, and the content of Y ranges from 1 wt.% to 3 wt.%. The invention further discloses a preparing method of the ageing strengthening magnesium alloy. The ageing strengthening magnesium alloy with the evenly dispersed and distributed granular quasi crystals and rod-like phases beta 1' is obtained in the manner that on the basis of preparing of the cast-state Mg-Zn-Y alloy, the solid solution treatment and ageing treatment under the effect of high pressure are conducted. The high-density granular quasi crystals with the size being about 10 nm and the beta1-MgZn2 precipitation phases are evenly dispersed and distributed on a magnesium base body, and therefore the alloy has high peak value ageing hardness during ageing at the temperature being 200 DEG C and the hardness reaches 105 HV. The alloy can be subjected to long-term ageing treatment under the condition of the temperature being 200 DEG C, and good heat stability is achieved. The preparing method is simple in step and easy to operate, and conditions are easy to control and achieve.

Description

technical field [0001] The invention relates to an aging-strengthened magnesium alloy with evenly distributed granular quasicrystals and rod-like phases and a preparation method thereof, specifically belonging to the technical field of alloys. 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, the further application of magnesium alloys in industry is limited due to the problems of low strength, poor toughness, difficult plastic processing, and poor high-temperature creep properties. Therefore, improving the mechanical properties of magnesium alloys through various preparation technologies and expanding the application range ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04C22C1/03C22F1/06
CPCC22C1/03C22C23/04C22F1/06
Inventor 林小娉董允樊志斌李博王林徐高鹏王怡
Owner 东北大学秦皇岛分校
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