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Authigenic quasicrystal-reinforced Mg-Zn-Y alloy and smelting method thereof

A quasicrystal and autogenous technology, applied in autogenous quasicrystal reinforced Mg-Zn-Y alloy, autogenous quasicrystal reinforced Mg-Zn-Y alloy and its smelting field, can solve the problem of inability to change the quasicrystal phase shape, etc. Market application prospect, low production cost, simple preparation process effect

Inactive Publication Date: 2011-10-12
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] There are also domestic and foreign public literature reports that the addition of Zr to Mg-Zn-Y alloys can refine the grains and improve their mechanical properties, but cannot change the morphology of the quasicrystalline phase.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The self-grown quasi-crystal reinforced Mg-Zn-Y alloy of the present invention has a chemical composition mass percentage of: 3.0% Zn, 0.5% Y, 0.10% Al-Ti-C, impurity elements Fe≤0.005%, Cu≤0.015% , Ni≤0.002%, Si≤0.01%, and the balance is Mg.

[0037]Melting method: configure the alloy according to the above ingredients, under the flux protection melting condition, add industrial pure magnesium into the steel crucible of the resistance crucible furnace, and sprinkle a small amount of covering agent on the bottom of the steel crucible at the same time, after the industrial pure magnesium is completely melted, heat it at 720±10°C When the industrial pure Zn and Mg-25Y master alloy are added, after the added industrial pure Zn and Mg-25Y master alloy are completely melted, the temperature is raised to 770±10°C, refined for 10 minutes, left to stand for 30 minutes and then skimmed slag; the melt is cooled to 710±5°C, the Al-8Ti-2C master alloy is added, and then ultrasonic ...

Embodiment 2

[0042] The self-grown quasi-crystal reinforced Mg-Zn-Y alloy of the present invention has a chemical composition mass percentage consisting of: 5.0% Zn, 1.2% Y, 0.14% Al-Ti-C, impurity elements Fe≤0.005%, Cu≤0.015% , Ni≤0.002%, Si≤0.01%, and the balance is Mg.

[0043] Melting method: using flux and high-purity argon for smelting protection, ultrasonic treatment frequency is 20kHz, ultrasonic treatment power is 1500W, ultrasonic treatment time is 7 minutes, the rest of the steps are as in Example 1, the room temperature tensile strength and elongation of the alloy in this example The elongation is 225MPa and 12.7%, respectively, and the tensile strength and elongation of the comparative example are respectively increased by 47.1% and 67.1%.

Embodiment 3

[0045] The self-grown quasicrystal reinforced Mg-Zn-Y alloy of the present invention has a chemical composition mass percentage of: 7.0% Zn, 1.75% Y, 0.25% Al-Ti-C, impurity elements Fe≤0.005%, Cu≤0.015% , Ni≤0.002%, Si≤0.01%, and the balance is Mg.

[0046] Melting method: high-purity argon is used for melting protection, the frequency of ultrasonic treatment is 20kHz, the power of ultrasonic treatment is 2500W, and the time of ultrasonic treatment is 3 minutes. The rest of the steps are as in Example 1. The room temperature tensile strength and elongation of the alloy in this example They are 243MPa and 16.0%, respectively, compared with the tensile strength and elongation of the comparative example, which are respectively increased by 58.9% and 110.5%.

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Abstract

The invention relates to an authigenic quasicrystal-reinforced Mg-Zn-Y alloy and a smelting method thereof, and belongs to the technical field of metal material preparation. The authigenic quasicrystal-reinforced Mg-Zn-Y alloy comprises the following chemical components in percentage by weight: 3.0-10.0% of Zn, 0.5-3.0% of Y, 0.05-1.0% of Al-Ti-C and the balance of Mg and unavoidable impurities. The smelting method comprises the following steps: firstly adding commercial pure magnesium, smelting the commercial pure magnesium, then adding Zn and Mg-Y intermediate alloy, and smelting the mixture; cooling the obtained melt to 700-720 DEG C, adding the Al-Ti-C intermediate alloy, introducing ultrasonic waves into the melt; and finally carrying out ultrasonic treatment, and casting to obtain the authigenic quasicrystal-reinforced Mg-Zn-Y alloy. The authigenic quasicrystal-reinforced Mg-Zn-Y alloy obtained by the method has the advantages of high strength and high elongation; the magnesium alloy meeting use requirements can be prepared by optimally controlling the Zn / Y ratio and the mass fraction of alloying elements; and the preparation process is simple and the production cost is low,thus the method is applicable to large-scale industrial production and having good market application prospect.

Description

technical field [0001] The invention relates to a self-generated quasi-crystal reinforced Mg-Zn-Y alloy and a melting method thereof, in particular to a self-generated quasi-crystal reinforced Mg-Zn-Y alloy added with a trace amount of Al-Ti-C master alloy , belongs to the technical field of metal material preparation. Background technique [0002] The self-grown quasicrystalline reinforced Mg-Zn-Y alloy has good mechanical properties not only at room temperature but also at high temperature, which has aroused great interest of material researchers at home and abroad, because it contains quasicrystalline phase I phase (Mg 3 Zn 6 Y 1 )'s sake. At the same time, Mg-Zn-Y alloys can be produced by traditional processes such as casting, rolling, extrusion, and forging. However, under conventional solidification conditions, the quasicrystal phase often has a network structure and is relatively coarse, which has limited improvement in mechanical properties and cannot fully exer...

Claims

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Application Information

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IPC IPC(8): C22C23/04C22C1/03
Inventor 崔红卫宫本奎张磊
Owner SHANDONG UNIV OF TECH
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