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A casting magnesium-based composite material with high strontium and high aluminum content and its preparation method

A composite material and a technology for casting magnesium, which are applied in the field of casting magnesium-based composite materials with high strontium and high aluminum content and their preparation to achieve the effects of improving performance and simple process flow

Active Publication Date: 2020-07-14
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the alloying elements added to non-rare earth magnesium alloys generally do not exceed 10% (mass percentage), and the strengthening design ideas of magnesium alloy materials are mostly imitated by aluminum alloy materials, that is, the heat treatment process of microalloying + solid solution-aging is obtained. Fine second phases with high density precipitation, such as in Mg-Zn alloys, the size and morphology of precipitates are controlled by microalloying elements such as Ag, Ca, Zr and solid solution-aging heat treatment process, but for a large number of eutectic There are few reports on the design of magnesium alloy materials with microstructure or even complete eutectic microstructure

Method used

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  • A casting magnesium-based composite material with high strontium and high aluminum content and its preparation method
  • A casting magnesium-based composite material with high strontium and high aluminum content and its preparation method
  • A casting magnesium-based composite material with high strontium and high aluminum content and its preparation method

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Effect test

Embodiment 1

[0032] A cast magnesium-based composite material with high strontium and high aluminum content, the components of the magnesium-based composite material are as follows: Sr: 2wt.%, Al: 3wt.%, Mn: 0.1wt.%, and the rest are Mg and impurities; Mn is a magnesium-manganese master alloy with a Mn content of 6wt.%, and the purity of other metals is above 99%.

[0033] A method for preparing a cast magnesium-based composite material with high strontium and high aluminum content, comprising the steps of:

[0034] (1) Prepare raw materials:

[0035] Weighing the required raw materials according to the mass percentage ratio of the components of a casting magnesium-based composite material with high strontium and high aluminum content;

[0036] (2) Ingot melting:

[0037] First, in the smelting unit CO 2 +SF 6 Under the protection of protective gas, add pure magnesium, heat to 750 ° C and stir until it is completely melted, the CO 2 and SF 6 The volume ratio is 199:1;

[0038]Then, ...

Embodiment 2

[0041] A cast magnesium-based composite material with high strontium and high aluminum content, the components of the magnesium-based composite material are as follows: Sr: 4wt.%, Al: 6wt.%, Zn: 0.5wt.%, and the rest are Mg and impurities; the purity of each metal is above 99%.

[0042] A method for preparing a cast magnesium-based composite material with high strontium and high aluminum content, comprising the steps of:

[0043] (1) Prepare raw materials:

[0044] Weighing the required raw materials according to the mass percentage ratio of the components of a casting magnesium-based composite material with high strontium and high aluminum content;

[0045] (2) Ingot melting:

[0046] First, in the smelting unit CO 2 +SF 6 Under the protection of protective gas, add pure magnesium, heat to 760 ° C and stir until it is completely melted, the CO 2 and SF 6 The volume ratio is 168:1;

[0047] Then, keep the temperature at 760°C, add other weighed raw materials successivel...

Embodiment 3

[0050] A cast magnesium-based composite material with high strontium and high aluminum content, the composition of the magnesium-based composite material is calculated by mass percentage: Sr: 5wt.%, Al: 5wt.%, Zn: 3wt.%, and the rest is Mg and impurities; the purity of each metal is above 99%.

[0051] A method for preparing a cast magnesium-based composite material with high strontium and high aluminum content, comprising the steps of:

[0052] (1) Prepare raw materials:

[0053] Weighing the required raw materials according to the mass percentage ratio of the components of a casting magnesium-based composite material with high strontium and high aluminum content;

[0054] (2) Ingot melting:

[0055] First, in the smelting unit CO 2 +SF 6 Under the protection of protective gas, add pure magnesium, heat to 770 ° C and stir until it is completely melted, the CO 2 and SF 6 The volume ratio is 152:1;

[0056] Then, keep the temperature at 770°C, add other weighed raw mater...

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Abstract

A cast magnesium-based composite material with high strontium and high aluminum content. The components of the magnesium-based composite material are calculated in mass percentage: Sr: 2.00~35.00%; Al: 3.00~25.00%; Ca: 0.00~3.00%; Ba: 0.00~8.00%; Zn: 0.00~8.00%; Mn: 0.00~5.00%; Sn: 0.00~8.00%, and the rest is Mg and impurities. The preparation method includes the following steps: (1) preparing materials; (2) ingot melting. The beneficial effects of the present invention are: the raw materials of the magnesium-based composite materials proposed by the present invention are relatively low-priced metals and alloys, and have certain cost advantages. The reinforcement formed by the present invention is an in-situ self-generated reinforcement and is evenly dispersed. The content of Sr and Al elements in the present invention is relatively high, forming a eutectic structure. The phase composition of the eutectic structure is α-Mg and Mg. 17 Sr 2 ,Al 2 Sr.Al 4 Sr phase, using Al 2 The Sr phase has both strong plasticity and good interface bonding with the magnesium matrix to prepare high-performance composite materials. The present invention adopts ordinary casting, has a simple process flow, and regulates the content and morphology of the eutectic structure by regulating the components to further improve the performance.

Description

technical field [0001] The invention belongs to the field of magnesium alloys and magnesium-based composite materials, in particular to a casting magnesium-based composite material with high strontium and high aluminum content and a preparation method. Background technique [0002] In recent years, the energy crisis, resource depletion and environmental degradation have put forward higher requirements for aerospace and automotive industry's lightweight, energy saving and emission reduction and low-carbon environmental protection. Magnesium alloys have attracted increasing attention due to their excellent properties such as low density, high specific strength, and high specific stiffness, and have become an important research direction for metal structural materials in recent years. Most of the relevant research work in the early stage focused on the strength and toughness of magnesium alloys: solid solution strengthening and precipitation strengthening were achieved by addin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/02C22C23/00C22C30/06C22C1/03
CPCC22C1/03C22C23/00C22C23/02C22C30/06
Inventor 潘虎成秦高梧李景仁任玉平杨延涛李松左良
Owner NORTHEASTERN UNIV LIAONING