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Layered magnesium-magnesium-based composite material plate as well as preparation method and application thereof

A composite material and layered technology, applied in metal rolling and other directions, can solve the problems of not constructing non-uniform magnesium-based composite materials, restricting the industrial application of magnesium-based composite material plates, and unable to solve the strength and toughness of composite materials, etc., to achieve Parameters can be adjusted arbitrarily to solve the effect of strength and ductility mismatch and stress concentration mitigation

Active Publication Date: 2022-03-04
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, this kind of non-uniform configuration is rarely reported in magnesium-based composite materials, and there is no report on the construction of non-uniform configuration magnesium-based composite materials, and it has not been able to solve the contradiction between the strength and toughness of composite materials.
In addition, the magnesium alloy sheet obtained by plastic processing has excellent mechanical properties and can be widely used in aerospace, new energy vehicles, medical and other fields. However, the processing and forming of magnesium-based composite deformed parts are difficult, which seriously restricts Industrial Application of Magnesium Matrix Composite Sheets
[0004] How to construct a magnesium-based composite sheet with a non-uniform configuration to improve the poor mechanical properties of the composite material has become a research hotspot in the field of magnesium-based composite materials at the present stage

Method used

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  • Layered magnesium-magnesium-based composite material plate as well as preparation method and application thereof
  • Layered magnesium-magnesium-based composite material plate as well as preparation method and application thereof

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preparation example Construction

[0048] The preparation method of a kind of layered magnesium-magnesium base composite plate of the present invention comprises the following steps:

[0049] S1. Put pure aluminum into a resistance furnace for heating and melting, and mix homogeneous potassium fluorotitanate K 2 TiF 6 and potassium fluoroborate KBF 4 Pour the powder into it, and cast it to obtain Al-TiB after fully reacting 2 Intermediate alloy block;

[0050] The melting temperature of pure aluminum is 800~1000℃, the atomic ratio of Ti and B in the mixed powder of potassium fluorotitanate and potassium fluoroborate is 1:2.2; the reaction time is 30~60min, Al-TiB 2 TiB in master alloy 2 The content is 5~15wt.%, TiB 2 The particle size is 50-300nm.

[0051] S2, pure Mg, pure Al, Zn ingot and the Al-TiB that step S1 makes 2 The intermediate alloy block is heated and melted under the protection of argon or JR2 covering agent, and is kept warm for a period of time, adding refining agent and vigorously stirre...

Embodiment 1

[0066] Pure aluminum is put into a resistance furnace and heated to 800°C to melt, and the evenly mixed potassium fluorotitanate K 2 TiF 6 and potassium fluoroborate KBF 4 Pour the powder (the atomic ratio of Ti to B is 1:2.2), fully react for 60 minutes and cast to obtain Al-TiB 2 Master Alloy Bulk, Al-TiB 2 TiB in master alloy 2 The content is 5wt.%, and the average size is 50nm. Pure Mg, pure Al, Zn ingots and Al-TiB 2 The master alloy block is heated to 700 ° C under the protection of argon to melt, and after 30 minutes of heat preservation, a refining agent (composition of 3536wt.% NaCl, 27wt.% CaF 2 , 38wt.% MgCl 2 ) vigorously stirred to remove surface scum, and the melt temperature was cast into a low-carbon steel mold preheated to 200°C at a temperature of 700°C to obtain an ingot.

[0067] The composite material ingot was subjected to solution treatment, the solution temperature was 380°C, and the holding time was 30h. Then perform multi-pass hot rolling, the...

Embodiment 2

[0071] Pure aluminum is put into a resistance furnace and heated to 850°C to melt, and the evenly mixed potassium fluorotitanate K 2 TiF 6 and potassium fluoroborate KBF 4 Pour the powder (the atomic ratio of Ti to B is 1:2.2), fully react for 40 minutes and cast to obtain Al-TiB 2 Master Alloy Bulk, Al-TiB 2 TiB in master alloy 2 Content at 10wt.%, size at

[0072] 120nm. Pure Mg, pure Al, Zn ingots and Al-TiB 2 The master alloy block is heated to 750°C under the protection of argon to melt, and after 10 minutes of heat preservation, a refining agent (composition of 32wt.% NaCl, 24wt.% CaF 2 , 44wt.% MgCl 2 ) vigorously stirred to remove surface scum, and the melt temperature was cast into a low-carbon steel mold preheated to 350°C at a temperature of 710°C to obtain an ingot.

[0073] The composite material ingot was subjected to solution treatment, the solution temperature was 390°C, and the holding time was 26h. Then perform multi-pass hot rolling, the annealing t...

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Abstract

The preparation method comprises the following steps: synthesizing an Al-TiB2 intermediate alloy containing nanoscale TiB2 ceramic particles through an in-situ reaction, adding the Al-TiB2 intermediate alloy into a magnesium alloy melt to obtain a TiB2 / Mg composite material, carrying out hot rolling to obtain a thin plate, alternately stacking the thin plate and a pure magnesium plate, and carrying out vacuum hot pressing sintering to obtain the layered magnesium-magnesium-based composite material plate. And the layered magnesium / magnesium-based composite material plate with excellent performance can be prepared through multi-pass hot rolling. In the macroscale, the ceramic particles are non-uniformly distributed in a layered manner, and in the microscale, the ceramic particles are uniformly distributed in the magnesium-based composite material layer. The strength, plasticity and toughness of the laminated composite material plate can be flexibly and accurately regulated and controlled by regulating and controlling the content of TiB2 particles in the laminated composite material and the interlayer spacing, the problem that the toughness of the composite material is mismatched is hopefully solved, and the method has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of magnesium-based composite material preparation, and in particular relates to a layered magnesium-magnesium-based composite material plate and its preparation method and application. Background technique [0002] Magnesium alloy, as the lightest metal structural material, has a series of advantages such as low density, high specific strength / specific stiffness, damping and shock absorption, strong impact resistance, excellent casting performance and recyclability, and advocates energy saving, emission reduction and Under the background of green and environmental protection development, it has become the material of choice for lightweight in aerospace, new energy vehicles, electronics, communications and other fields. However, the low strength and poor corrosion resistance of magnesium alloys seriously restrict its large-scale application. Particle-reinforced magnesium-based composites are prepared by intr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/02C22F1/06C22C23/02C22C1/10C22C1/06C22C21/00C22C32/00B21B3/00B21B1/38C22C1/03
CPCC21D8/0226C21D8/0263C22F1/06C22C23/02C22C1/1036C22C1/1094C22C1/06C22C21/00C22C32/0073B21B3/00B21B1/38B21B2001/386C22C1/1052C22C1/1047
Inventor 肖鹏董奕雪高义民杨昊城赵奇强
Owner XI AN JIAOTONG UNIV
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