Flame retardant magnesium alloy with excellent mechanical properties, and preparation method thereof

A magnesium alloy, inevitable technology, applied in the field of magnesium alloy

Active Publication Date: 2012-10-03
KOREA INST OF MATERIAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, it is an object of the present invention to provide a magnesium alloy aimed at solving the aforementioned problems in the related field

Method used

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  • Flame retardant magnesium alloy with excellent mechanical properties, and preparation method thereof
  • Flame retardant magnesium alloy with excellent mechanical properties, and preparation method thereof
  • Flame retardant magnesium alloy with excellent mechanical properties, and preparation method thereof

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Embodiment Construction

[0073] Exemplary embodiments of the Mg alloy and its manufacturing method of the present invention will be described in detail below. However, it is to be understood that the embodiments described below are illustrative and do not limit the present invention.

[0074] In order to solve the above-mentioned problems in the related field and achieve the object of the present invention, studies were carried out on the design of alloys by thermodynamic calculations. As a result of this study, the inventors of the present invention found that (as shown in Table 1 below), compared with adding Ca alone When Ca and Y are added in combination to Mg-Al-based alloys or Mg-Al-Zn-based alloys, the fraction of the hard eutectic phase (eutectic phase I) is significantly reduced, while induced Al 2 Formation of the Y phase (i.e., particles forming micronized fines), thereby enabling improved ignition resistance as well as tensile strength.

[0075] Table 1

[0076]

[0077] The inventors...

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Abstract

Provided is a magnesium alloy with remarkable ignition resistance and being excellent in both strength and ductility. According to the present invention, the magnesium alloy comprises 1.0-7.0 wt% of Al, 0.05-2.0 wt% of Ca, 0.05-2.0 wt% of Y, and the balance of Mg and inevitable impurities, wherein the content of Ca and Y is 0.1-2.5 wt% on the basis of the total weight of the magnesium alloy. According to the present invention, the magnesium alloy forms a dense composite layer serving as a protective film to be able to be melted, cast and processed in air or in the common inert atmosphere (Ar, N2) and to inhibit the spontaneous combustion of chips piled in a machining process due to having superior oxidation resistance or ignition resistance.

Description

technical field [0001] The present invention relates to magnesium alloys having excellent ignition resistance or nonflammability; in particular, the present invention relates to magnesium alloys characterized in that due to the presence of a stable protective Films, which can be melted and cast in air and common inert atmospheres; have excellent resistance to ignition or non-combustibility, thereby avoiding spontaneous combustion of chips (chips); and are excellent in both strength and ductility. Background technique [0002] Magnesium alloy with high specific strength is the lightest among alloys and can be used in various casting and machining processes and has a wide range of applications, so it is used in almost all fields where light weight is required, such as transportation tools (vehicles) components and electronic components. However, magnesium (Mg) is a metal element with low electrochemical potential and very active. Mg is still limited in the stability and reli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00B22D21/04C22C23/02C22C23/04
CPCB22D21/04C22C23/04C22C1/02C22C23/02C22C23/00C22C1/03C22C23/06C22F1/06
Inventor 金勇敏金夏植柳凤善任昌东
Owner KOREA INST OF MATERIAL SCI
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