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Magnesium alloy

a magnesium alloy and magnesium alloy technology, applied in the field of magnesium alloys, can solve the problems of insufficient heat resistance, insufficient strength at room temperature, and insufficient high-temperature strength or room-temperature strength of magnesium alloys of patent documents 1 and 2, and achieve sufficient high-temperature strength and room-temperature strength. the effect of sufficient strength

Inactive Publication Date: 2014-02-13
ADVANCED TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

The present invention allows for the creation of a magnesium alloy that has both room-temperature strength and high-temperature strength. This means that the alloy can withstand both low and high temperatures without losing its strength.

Problems solved by technology

However, the magnesium alloy according to Patent Document 1 had a problem that it is still insufficient in heat resistance, i.e. strength at high temperature.
Meanwhile, the magnesium alloy according to Patent Document 2 had a problem that it is necessary to suppress the working degree (rolling reduction ratio) of hot rolling and forging to a low value so as to obtain a defined aspect ratio of crystal grains, so that the strength at room temperature may be sometimes insufficient.
Thus, the magnesium alloys of Patent Documents 1 and 2 may be sometimes insufficient in high-temperature strength or room-temperature strength.

Method used

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examples

[0084]Alloy samples, each containing components shown in Table 1, were prepared.

[0085]The value y in the equation (2) of samples of Examples (Example 1 and Example 2) shown in Table 1 is 15.5 in Example 1 and is 20.9 in Example, and therefore alloy samples satisfy the equation (1). In both Example 1 and Example 2, a ratio of (content of calcium):(content of strontium) is 1:1 in terms of a mass ratio.

TABLE 1ComparativeComparativeComparativeExample 1Example 1Example 2Example 2Example 3Mass %Atomic %Mass %Atomic %Mass %Atomic %Mass %Atomic %Mass %Atomic %Mg88.190.079.180.869.971.460.962.251.953.0Al10.09.215.013.820.018.425.023.030.027.6Ca0.70.42.71.74.83.06.84.28.85.5Sr0.70.22.70.84.81.46.81.98.82.5Zn0.50.20.50.20.50.20.50.20.50.2

[0086]Each alloy sample was melted at 700° C. and then cast into a billet using a cylindrical die. The casted billet was heated to 400° C. at a heating rate of 0.5° C. / minute, maintained for 48 hours and then water-cooled. After removing a surface oxide layer ...

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Abstract

The present invention provides magnesium alloy which has sufficiently high strength at room temperature and high temperature.Disclosed is a magnesium alloy comprising: aluminum (Al): 14.0 to 23.0% by mass, calcium (Ca): 11.0% by mass or less (not including 0% by mass), strontium (Sr): 12.0% by mass or less (not including 0% by mass), and zinc (Zn): 0.2 to 1.0% by mass.

Description

TECHNICAL FIELD[0001]The present invention relates to a magnesium alloy, particularly a magnesium alloy having high strength and high heat resistance, which can be worked into a wrought material such as an extruded or forged material.BACKGROUND ART[0002]It is known that magnesium is the lightest and has the highest specific strength among practical metals. In order to realize reduction in carbon dioxide emission amount due to weight reduction of vehicles, and extension in travelable distance on one charge of electric cars, as measures to cope with global warming, use of a magnesium alloy is expanded in various applications, for example, application of parts which underwent weight reduction using a magnesium alloy.[0003]Usually, parts of the magnesium alloy are formed by a casting or die-casting method.[0004]The reason is as follows. That is, conventional various magnesium alloys can achieve comparatively high room-temperature strength by grain size refinement through plastic working...

Claims

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Application Information

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IPC IPC(8): C22C23/02
CPCC22C23/02C22F1/06
Inventor HIRAI, KINJIHIGASHI, KENJITAKIGAWA, YORINOBUUESUGI, TOKUTERU
Owner ADVANCED TECH