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Rare-earth magnesium alloy and preparation method thereof

A rare earth magnesium and alloy technology, which is applied in the field of magnesium-based alloys, can solve the problems that the comprehensive performance is difficult to meet the needs, and achieve the effects of improving solid solubility, wide source of raw materials, and reducing energy consumption and cost.

Inactive Publication Date: 2018-07-06
HENAN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned existing technologies can improve the corrosion resistance or mechanical properties of magnesium alloys, their comprehensive properties are difficult to meet the needs.

Method used

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  • Rare-earth magnesium alloy and preparation method thereof
  • Rare-earth magnesium alloy and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0027] The rare earth magnesium alloy of this embodiment is composed of the following components in mass percentage: Al 5.0%, Zn 0.9%, Mn 0.2%, Nb 0.25%, Sm 0.55%, Y 0.35%, the balance is Mg and unavoidable Impurities: the total mass of Fe, Cu and Ni in the impurities accounts for less than 0.2% of the mass percentage of the rare earth magnesium alloy.

[0028] The preparation method of the rare earth magnesium alloy of the present embodiment comprises the following steps:

[0029] 1) Weigh the required amount of raw materials according to the ratio, then preheat each raw material to 200°C, and then 2 +SF 6 Under the protection of mixed gas, put pure magnesium, pure aluminum, pure zinc, and pure manganese into the corundum crucible for melting, and obtain the alloy melt after all the components are melted;

[0030] 2) Adjust the temperature of the alloy melt to 700°C, then add the magnesium-rare earth master alloy and aluminum-niobium alloy that have been preheated to 200°C,...

Embodiment 2

[0033] The rare earth magnesium alloy of this embodiment is composed of the following components in mass percentage: Al 5.5%, Zn 0.8%, Mn 0.2%, Nb 0.3%, Sm 0.5%, Y 0.35%, the balance is Mg and unavoidable Impurities, the total mass of Fe, Cu and Ni in the impurities accounts for less than 0.2% of the mass percentage of the rare earth magnesium alloy.

[0034] The preparation method of the rare earth magnesium alloy of this embodiment is completely the same as that of Embodiment 1 except for the amount of raw materials used.

Embodiment 3

[0036] The rare earth magnesium alloy of this embodiment is composed of the following components by mass percentage: Al 5.5%, Zn 0.85%, Mn 0.3%, Nb 0.28%, Sm 0.45%, Y 0.3%, and the balance is Mg and unavoidable Impurities, the total mass of Fe, Cu and Ni in the impurities accounts for less than 0.2% of the mass percentage of the rare earth magnesium alloy.

[0037] The preparation method of the rare earth magnesium alloy of this embodiment is completely the same as that of Embodiment 1 except for the amount of raw materials used.

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Abstract

The invention relates to a rare-earth magnesium alloy and a preparation method thereof, and belongs to the technical field of magnesium-based alloys. The rare-earth magnesium alloy comprises, by mass,5.0-6.0% of Al, 0.8-0.9% of Zn, 0.1-0.3% of Mn, 0.25-0.30% of Nb, 0.45-0.55% of Sm, 0.3-0.4% of Y and the balance Mg and inevitable impurities. According to the rare-earth magnesium alloy, the rare-earth element and the niobium element are added, so that solid solubility of the Al element in a magnesium matrix is improved; and meanwhile, an intermetallic compound is formed in the magnesium alloy,so that stability of a rare-earth magnesium alloy corrosion-resistant surface film is improved, the corrosion current density is reduced, the corrosion rate of the magnesium alloy is obviously reduced, and meanwhile, the mechanical property of the magnesium alloy is remarkably improved.

Description

technical field [0001] The invention relates to a rare earth magnesium alloy and a preparation method thereof, belonging to the technical field of magnesium-based alloys. Background technique [0002] In the existing metal structure material system, magnesium alloy is a new type of lightweight metal structure material with very high specific strength, specific stiffness and elastic modulus, excellent casting performance and high damping and anti-vibration performance, and It has relatively good processing performance, is easy to recycle, has environmental protection characteristics, and has a very wide application prospect. It is favored by industries such as aerospace, transportation, electronic communication, and automobile industry, and has become one of the most promising metal structural materials at present. However, magnesium alloys also have many disadvantages, such as poor mechanical properties at room temperature, poor plasticity, easy combustion during smelting, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22C1/03C22F1/06
CPCC22C23/02C22C1/03C22F1/06
Inventor 陈君张清李全安朱利敏付三玲陈晓亚李梅菊张帅王颂博关海昆
Owner HENAN UNIV OF SCI & TECH
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