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Self-strengthening high-zinc heat-resistant magnesium alloy

A magnesium alloy, heat-resistant technology, applied in the field of light metal materials, can solve the problems of insufficient high-temperature strength and poor plasticity of high-zinc-magnesium alloys, and achieve the effects of increasing room temperature and high temperature elongation, overcoming poor plasticity, and improving crystallographic morphology

Inactive Publication Date: 2010-09-29
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the problems of poor plasticity and insufficient high-temperature strength of high-zinc-magnesium alloys have not been fundamentally resolved.

Method used

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  • Self-strengthening high-zinc heat-resistant magnesium alloy
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  • Self-strengthening high-zinc heat-resistant magnesium alloy

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Embodiment 1

[0014] Embodiment 1: A self-strengthening high-zinc heat-resistant magnesium alloy, the weight percentage of each composition in the magnesium alloy is zinc 10%, aluminum 4.0%, rare earth yttrium (containing Y25.4% yttrium-rich mixed rare earth) 0.4%, The remainder is magnesium and unavoidable impurities.

Embodiment 2

[0015] Embodiment 2: A self-strengthening high-zinc heat-resistant magnesium alloy, the weight percentage of each component in the magnesium alloy is 8% zinc, 3.4% aluminum, 0.4% rare earth erbium, and the rest is magnesium and unavoidable impurities.

Embodiment 3

[0016] Embodiment 3: A self-strengthening high-zinc heat-resistant magnesium alloy, the weight percentage of each component in the magnesium alloy is 7% of zinc, 3.0% of aluminum, 0.4% of rare earth erbium, and the rest is magnesium and unavoidable impurities.

[0017] The self-strengthening high-zinc and heat-resistant magnesium alloys of the present invention all use magnesium as a matrix and can be produced by the following preparation process: raw materials are magnesium ingots, pure zinc, pure aluminum and rare earth master alloys. Use resistance crucible furnace to melt, pass into SF 6 and CO 2 Mixed gas protection. During the smelting process, the magnesium ingot is first placed in the crucible, and after heating and melting, zinc block and aluminum block are added at the same time, and after complete melting, magnesium-erbium intermediate alloy or yttrium-rich rare earth magnesium alloy is added. After it is completely melted, heat the melt to 750°C, keep it warm for...

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Abstract

The invention provides high temperature high strength high zinc heat-resistant magnesium alloy which is provided with good casting property and mechanical properties and in particular can happen self-strengthening under high temperature stress environment. The weight percentage composition of the alloy is zinc 6%-10%, aluminum 2%-4% and rare earth 0.1%-1.0%, wherein the proportion by weight between the zinc element and the aluminum element is 2-3, and others are magnesium and unavoidable impurity. The alloy is characterized in that the alloy cast structure is composed of a basal body and a single spherical second phase, and has prominent strain aging effect under the high temperature. The high zinc heat-resistant magnesium alloy has good percentage elongation under room temperature and high temperature and high temperature strength, and overcomes the problems that high zinc magnesium alloy has bad plasticity, insufficient high temperature strength and the like.

Description

technical field [0001] The invention relates to a light metal material, in particular to a high-zinc heat-resistant magnesium alloy that can undergo self-strengthening in a high-temperature stress environment. Background technique [0002] As a new type of lightweight metal material, magnesium alloy has been widely used in aerospace, transportation, 3C products and many other fields due to its excellent specific strength and other advantages. At present, Mg-Al series is the most widely used, but the mechanical properties of this type of alloy will decrease rapidly when the temperature is higher than 120 ° C, making it impossible to promote the application in many industrial products and equipment. Although there are magnesium alloys that can be used at 200°C to 300°C, these magnesium alloys contain a relatively high proportion of precious elements (such as Nd, Th, Y, Sc or mixed rare earths, etc.), resulting in the cost of the alloy cannot be ordinary Industrial products ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/04
Inventor 张静杨亮潘复生何曲波汤爱涛杨明波
Owner CHONGQING UNIV
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