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A kind of high-strength flame-retardant magnesium alloy and its preparation method

A magnesium alloy, high-strength technology, applied in the field of magnesium alloys, can solve problems such as inability to meet industrial applications and only tensile strength, and achieve the effects of improved performance, increased tensile strength, and increased ignition point.

Active Publication Date: 2019-08-09
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] A lot of research has been carried out on flame-retardant magnesium alloys at home and abroad. For example, the Chinese invention patent with the application publication number CN1241641A discloses a "casting flame-retardant magnesium alloy and its melting and casting process", which specifically discloses a The flame retardant magnesium alloy of , Be and rare earth elements can reach 800°C, but its tensile strength is only 160MPa, which cannot meet the current industrial applications.

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  • A kind of high-strength flame-retardant magnesium alloy and its preparation method

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Embodiment 1

[0033] The high-strength flame-retardant magnesium alloy of this embodiment is composed of the following elements by weight: 3.5% Nd, 1.5% Sm, 2.5% Sn, 1.7% Bi, 0.3% Ca, 0.5% Nb, 0.3% The total amount of Sb impurity elements Fe, Cu and Ni is less than 0.2%, and the balance is Mg.

[0034] The preparation method of the high-strength flame-retardant magnesium alloy of the present embodiment comprises the following steps:

[0035] 1) Preheat the raw materials of pure magnesium, pure tin, pure bismuth, pure antimony, magnesium samarium master alloy, magnesium neodymium master alloy, magnesium calcium master alloy and magnesium niobium master alloy at 200°C, so that the temperature of the raw materials reaches 200°C ;

[0036] 2) Put the preheated pure magnesium, pure tin, pure bismuth, and pure antimony into a corundum crucible, put it into an intermediate frequency induction furnace, and 2 +SF 6 Heating under the protection of mixed gas to melt all the raw materials to obtain ...

Embodiment 2

[0041] The high-strength flame-retardant magnesium alloy of this embodiment is composed of the following elements by weight: 3.5% Nd, 1.5% Sm, 2.4% Sn, 1.5% Bi, 0.4% Ca, 0.5% Nb, 0.4% The total amount of Sb impurity elements Fe, Cu and Ni is less than 0.2%, and the balance is Mg.

[0042] The preparation method of the high-strength flame-retardant magnesium alloy of the present embodiment comprises the following steps:

[0043] 1) Preheat the raw materials of pure magnesium, pure tin, pure bismuth, pure antimony, magnesium samarium master alloy, magnesium neodymium master alloy, magnesium calcium master alloy and magnesium niobium master alloy at 200°C, so that the temperature of the raw materials reaches 200°C ;

[0044] 2) Put the preheated pure magnesium, pure tin, pure bismuth, and pure antimony into a corundum crucible, put it into an intermediate frequency induction furnace, and 2 +SF 6 Heating under the protection of mixed gas to melt all the raw materials to obtain ...

Embodiment 3

[0049] The high-strength flame-retardant magnesium alloy of this embodiment is composed of the following elements by weight: 3.5% Nd, 1.5% Sm, 2.4% Sn, 1.5% Bi, 0.6% Ca, 0.5% Nb, 0.45% The total amount of Sb impurity elements Fe, Cu and Ni is less than 0.2%, and the balance is Mg.

[0050] The preparation method of the high-strength flame-retardant magnesium alloy of the present embodiment comprises the following steps:

[0051] 1) Preheat the raw materials of pure magnesium, pure tin, pure bismuth, pure antimony, magnesium samarium master alloy, magnesium neodymium master alloy, magnesium calcium master alloy and magnesium niobium master alloy at 200°C, so that the temperature of the raw materials reaches 200°C ;

[0052] 2) Put the preheated pure magnesium, pure tin, pure bismuth, and pure antimony into a corundum crucible, put it into an intermediate frequency induction furnace, and 2 +SF 6 Heating under the protection of mixed gas to melt all the raw materials to obtain...

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Abstract

The invention relates to a high-strength flame-retardant magnesium alloy and a preparation method thereof, belonging to the technical field of magnesium alloys. The high-strength flame-retardant magnesium alloy of the present invention is composed of the following elements by weight percentage: 1.8-2.7% of Sn, 1.2-1.8% of Bi, 0.2-0.6% of Ca, 0.4-0.6% of Nb, 0.3-0.45% Sb, 4.5-6% rare earth elements, the balance is Mg and unavoidable impurities. The high-strength flame-retardant magnesium alloy of the invention utilizes the multi-element micro-alloying method to simultaneously improve the flame-retardant and mechanical properties of the magnesium alloy.

Description

technical field [0001] The invention relates to a high-strength flame-retardant magnesium alloy and a preparation method thereof, belonging to the technical field of magnesium alloys. Background technique [0002] In the existing metal structure material system, magnesium alloy has high specific strength and specific stiffness, excellent casting performance and high damping and anti-vibration performance, easy to recycle, and has a very wide application prospect. As well as the favor of the automobile industry and other industries, it has become one of the most promising metal structural materials. [0003] The application of magnesium alloy is restricted by the following factors: first, the strength and toughness of magnesium alloy is not ideal, which limits its wide use; second, magnesium alloy is very flammable, because metal magnesium is more active, so magnesium alloy is very difficult to melt and process during smelting and processing. Oxidative combustion is prone to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/06C22C1/03C22F1/06
CPCC22C1/03C22C23/06C22F1/06
Inventor 陈君李梅菊陈晓亚张清李全安张帅王颂博关海昆
Owner HENAN UNIV OF SCI & TECH
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