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Single-phase solid solution cast or wrought magnesium alloys

A technology for casting magnesium alloys and magnesium alloys, which is applied in the field of single-phase solid-solution magnesium alloys, and can solve problems such as insufficient mechanical properties and corrosion resistance, and recrystallization

Inactive Publication Date: 2012-08-08
HELMHOLTZ ZENT GEESTHACHT ZENT FUER MATERIAL UND KUESTENFORSCHUNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the AZ31 (Mg-2.9Al-0.8Zn) alloy has recrystallization problems during hot working, and has insufficient mechanical properties and corrosion resistance.

Method used

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  • Single-phase solid solution cast or wrought magnesium alloys
  • Single-phase solid solution cast or wrought magnesium alloys
  • Single-phase solid solution cast or wrought magnesium alloys

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Embodiment Construction

[0011] The strengthening effect of rare earth elements on existing magnesium alloys is explained by two mechanisms, namely precipitation strengthening and solid solution strengthening. Precipitation strengthening, especially age hardening, has been emphasized to contribute to the improvement of mechanical properties. However, without being bound by any theory, studies have shown that in the alloys involved in the present invention, precipitation strengthening does not exist, and solid solution strengthening is the main mechanism for the improvement of the mechanical properties of the magnesium alloys in the present invention.

[0012] It was further shown that solid solution strengthening depends on the content of alloying elements in the magnesium matrix and the difference in atomic radii between these elements and magnesium, that is, higher alloying element content as well as alloying elements with larger atomic radii difference are both Contributes to solid solution strengt...

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Abstract

The present invention relates to single-phase solid solution magnesium alloys suitable for the applications as cast or wrought. These alloys are prepared by multi-microalloying with rare earth elements (including gadolinium, yttrium, dysprosium, samarium, lanthanum, cerium, neodymium and praseodymium). Each alloy contains 0.5 to less than 5 wt.% rare earth elements with a content of 0.05-2.0 % by weight. The total amount of rare earth elements is controlled below 5 % by weight in order for economical considerations. The amount of grain refiner calcium or zirconium is in the range of 0.05-0.6 % by weight. These alloys can be prepared by die casting, permanent casting, chill casting, semi-solid processes, continuous casting and continuous twin roll casting.

Description

technical field [0001] The present invention relates to cast or forged single-phase solid-solution magnesium alloys having excellent mechanical properties as well as formability and corrosion resistance. Background technique [0002] Magnesium alloys have not yet been widely used in the automotive industry. The main technical problems hindering the large-scale application of magnesium alloys are their low ductility and toughness at low temperatures, and their poor corrosion resistance and creep resistance at high temperatures. Currently, such commercial articles are usually manufactured by high temperature die casting. The application of wrought magnesium alloys is limited due to poor formability and corrosion resistance. [0003] In order for wrought magnesium alloys to gain a higher degree of acceptance in the industrial field, it is necessary to improve their low-temperature formability. The low ductility and toughness result from the inherent brittle nature of the hex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06
CPCC22C23/04C22C23/06
Inventor 黄原定彭秋明诺伯特·豪特卡尔·乌尔里希·凯勒
Owner HELMHOLTZ ZENT GEESTHACHT ZENT FUER MATERIAL UND KUESTENFORSCHUNG
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