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Magnesium alloy doped with titanium aluminum carbide and preparation method of magnesium alloy

A magnesium alloy and aluminum carbide technology, which is applied in the field of magnesium alloy doped with titanium aluminum carbide and its preparation, can solve the problems of stress corrosion cracking, poor high temperature resistance of magnesium alloy, high cost, etc., achieve stress release and facilitate hot extrusion , Inhibit the effect of powder sticking to the tank

Inactive Publication Date: 2020-05-26
QINGHAI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the conventional powder metallurgy method is affected by its complex process, high cost or poor quality of the billet, the powder metallurgy process system is not perfect, so in order to obtain high-performance magnesium alloys, it is necessary to carry out the powder metallurgy process and technology of magnesium alloys. systematic research
[0004] (2) It is difficult to have both low-density and high-strength properties of magnesium alloys: the strength and ductility of Mg-Zn-Zr alloys are low, and alloying elements are generally added to increase the strength of the alloy, but this method is in While improving the strength, it is often at the expense of the excellent plasticity and toughness of the alloy
[0005] (3) Poor corrosion resistance of magnesium alloys: the poor corrosion resistance of magnesium alloys is due to its active chemical properties, so when used in various environments, galvanic, local, intergranular and high-temperature corrosion will occur, and stress will also occur A series of problems such as corrosion cracking and corrosion fatigue, the existence of these corrosion problems will inevitably affect the application effect and service life of magnesium-lithium alloys, and reduce its application range
[0006] (4) The high temperature resistance of magnesium alloy is poor: when the general magnesium alloy is used for a long time, the temperature does not exceed 150 ℃
[0007] In summary, magnesium alloys still have a series of problems such as low strength, poor corrosion resistance, and poor thermal stability that have not been resolved. Adding ternary layered ceramic phase Ti 3 AlC 2 The strength of the post-alloy material is not greatly improved, but the ductility is significantly improved, so it is necessary to improve the Mg-Zn-Zr-Ti 3 AlC 2 Alloy material alloy system for design and development

Method used

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  • Magnesium alloy doped with titanium aluminum carbide and preparation method of magnesium alloy
  • Magnesium alloy doped with titanium aluminum carbide and preparation method of magnesium alloy
  • Magnesium alloy doped with titanium aluminum carbide and preparation method of magnesium alloy

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Embodiment 1

[0041] Magnesium alloys doped with titanium aluminum carbide, consisting of Mg, Zn, Zr and Ti 3 AlC 2 Composition; the mass of each component in 100g magnesium alloy is Zn: 4.9g; Zr: 0.16g; Ti 3 AlC 2 : 1g; the balance is Mg and unavoidable impurities.

[0042] Preparation:

[0043] (1) Preparation of alloy powder: first weigh 99gMg-Zn-Zr powder and 1gTi 3 AlC 2 Put the powder into a mechanical ball mill tank, then add 0.05g of ethanol, then add 1g of zinc stearate, vacuumize to a vacuum of 1Pa, then pass in argon for 10s, add 1kg of stainless steel balls with a particle size of 5mm, and then adjust the revolution speed 150r / min, first rotate forward for 15min, pause for 20min, then reverse for 15min, pause for 20min, and circulate ball mill for 10h in this way to obtain alloy powder;

[0044] (2) Sintering: Use a vacuum hot-pressing sintering furnace for high-temperature pressureless sintering. First, put the alloy powder obtained in step (1) into the mold, then install...

Embodiment 2

[0047] Magnesium alloys doped with titanium aluminum carbide, consisting of Mg, Zn, Zr and Ti 3 AlC 2 Composition; the mass of each component in 100g magnesium alloy is Zn: 5.5g; Zr: 0.19g; Ti 3 AlC 2 : 10g; the balance is Mg and unavoidable impurities.

[0048] Preparation:

[0049] (1) Preparation of alloy powder: first weigh 90gMg-Zn-Zr powder and 10gTi 3 AlC 2 Put the powder into a mechanical ball mill tank, then add 0.15g ethanol, then add 2g zinc stearate, vacuumize to a vacuum degree of 2Pa, then pass in argon for 15s, add 1kg of stainless steel balls with a particle size of 8mm, and then adjust the revolution speed 260r / min, rotate forward for 20 minutes, stop for 30 minutes, then reverse for 20 minutes, stop for 30 minutes, and circulate the ball mill for 14 hours to obtain alloy powder;

[0050] (2) Sintering: Use a vacuum hot-pressing sintering furnace for high-temperature pressureless sintering. First, put the alloy powder obtained in step (1) into the mold, ...

Embodiment 3

[0053] Magnesium alloys doped with titanium aluminum carbide, consisting of Mg, Zn, Zr and Ti 3 AlC 2 Composition; the mass of each component in 100g magnesium alloy is Zn: 5.1g; Zr: 0.18g; Ti 3 AlC 2 : 5g; the balance is Mg and unavoidable impurities.

[0054] Preparation:

[0055] (1) Preparation of alloy powder: first weigh 95gMg-Zn-Zr powder and 5gTi 3 AlC 2 Put the powder into a mechanical ball mill tank, then add 0.1g of ethanol, then add 2g of zinc stearate, vacuumize to a vacuum of 1Pa, then pass in argon for 12s, add 1kg of stainless steel balls with a particle size of 8mm, and then adjust the revolution speed 200r / min, first rotate forward for 20min, pause for 25min, then reverse for 20min, pause for 25min, and circulate ball mill for 12h to obtain alloy powder;

[0056] (2) Sintering: Use a vacuum hot-pressing sintering furnace for high-temperature pressureless sintering. First, put the alloy powder obtained in step (1) into the mold, then install the mold int...

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Abstract

The invention discloses a magnesium alloy doped with titanium aluminum carbide. The magnesium alloy is prepared from Mg, Zn, Zr and Ti3AlC2 and is prepared from the components including, by mass, 4.9%-5.5% of Zn, 0.16%-0.19% of Zr, 1%-10% of Ti3AlC2 and the balance Mg and inevitable impurities. A preparation method includes the following steps that (1) alloy powder is prepared, specifically, ethylalcohol is added to Mg-Zn-Zr powder and Ti3AlC2, then zinc stearate is added, vacuum pumping and ball milling are performed, and the alloy powder is obtained; (2) sintering is performed, specifically, the alloy powder is placed in a vacuum hot-pressing sintering furnace, vacuum pumping, heating sintering and cooling are performed, and the alloy blank is obtained; (3) hot extrusion is performed, specifically, heat insulation is performed firstly, then the alloy blank is placed in an extruding mold for extrusion, and the magnesium alloy is obtained. According to the magnesium alloy, the ternarylayered ceramic phase Ti3AlC2 is added to promote alloy grain refinement, production of high-melting-point hard phases and the like, the ductility of the magnesium alloy is improved on the premise that the strength is guaranteed, and the certain reference basis is provided for practical application of the magnesium alloy.

Description

technical field [0001] The invention relates to the technical field of alloy smelting, in particular to a magnesium alloy doped with titanium and aluminum carbide and a preparation method thereof. Background technique [0002] Only by developing and applying lightweight and high-strength materials to realize the lightweight of industrial fields, aerospace and automobile manufacturing industries can we further realize the social needs of green environmental protection, energy saving and emission reduction. Magnesium alloys with light weight and high strength can significantly reduce their weight when used as structural parts, but the existing magnesium alloys are not widely used in the industrial field because the alloy itself has some defects: [0003] (1) Powder metallurgy process and technology: Magnesium is a metal element with very active chemical properties. When the temperature reaches a certain value, it can be combined with O 2 Chemical reactions occur, and even exp...

Claims

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Application Information

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IPC IPC(8): C22C23/04C22C23/00C22C1/05C22C1/10B22F3/14B22F3/20B22F9/04C22C32/00
CPCB22F3/14B22F3/20B22F9/04B22F2009/043C22C1/05C22C23/00C22C23/04C22C32/0052
Inventor 王金辉赵磊唐彬彬时博
Owner QINGHAI UNIVERSITY