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High Zinc aluminium rare earth magnesium alloy

A magnesium alloy, aluminum rare earth technology, applied in the field of high zinc aluminum rare earth magnesium alloy, can solve the problems of excessive addition, lower mechanical properties, etc., and achieve the effect of preventing severe oxidation

Inactive Publication Date: 2005-11-16
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the addition of too much Al will reduce the mechanical properties

Method used

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  • High Zinc aluminium rare earth magnesium alloy
  • High Zinc aluminium rare earth magnesium alloy
  • High Zinc aluminium rare earth magnesium alloy

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Embodiment 1～4

[0017] The raw materials are pure magnesium, pure zinc, pure aluminum and rare earth master alloy. Melting in a resistance crucible furnace, the melting temperature is 700°C, and the temperature is measured by a thermocouple; 2% magnesium alloy covering agent, 1% magnesium alloy modifying agent. Casting tensile test bars in metal molds. Solution heat treatment is carried out in an electric box furnace. Its chemical composition and mechanical properties are listed in Table 1.

[0018] Table 1 Chemical composition and mechanical properties of high ZnAl rare earth magnesium alloy

[0019]

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Abstract

A high-Zn and-Al REMg alloy contains Zn (7-14 wt.%), A (3-8), RE (0.3-1.5) and Mg (rest). It is prepared through smelting in electric crucible furnace while covering with Mg alloy. It has fire point temp of more than 740 deg.c, tension strength (200-260 MPa) and elongation (1.4-3%).

Description

technical field [0001] The invention relates to a high-zinc-aluminum-rare-earth-magnesium alloy that does not contain Be and can be smelted directly in the atmosphere. Background technique [0002] Magnesium alloys are currently the lightest metal engineering materials. Their applications have expanded from the aerospace industry to civilian industries such as automobiles, electronics, communications, and home appliances, and their market potential is huge. There are many varieties of magnesium alloys available. According to the chemical composition in ASTM, ISO and GB standards, scientists and technicians divide them into four series: magnesium-aluminum, magnesium-zinc, magnesium-rare earth and magnesium-lithium. AZ5 and AZ90 commonly used in China belong to the magnesium-aluminum system (containing Al7.5-9.0%). [0003] However, the standard formation reaction free energy (ΔG°) of magnesium oxide is extremely low, the ignition point temperature (severe oxidation temperatu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/02
Inventor 姚三九
Owner WUHAN UNIV OF TECH
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