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Flame-retardant magnesium alloy and method for producing same

A manufacturing method and magnesium alloy technology, applied in the field of flame-retardant magnesium alloy and its manufacture, can solve problems such as molten metal combustion, and achieve the effects of inhibiting combustion, inhibiting ablation, and improving ablation resistance

Pending Publication Date: 2021-12-17
HONDA MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, magnesium alloys may burn molten metal during alloy melting during casting, which may pose a serious safety problem.

Method used

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  • Flame-retardant magnesium alloy and method for producing same

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Embodiment

[0080] Next, the present invention will be described in more detail based on examples, but the present invention is not limited thereto. In addition, unless otherwise specified, "ppm" described in Examples and Comparative Examples means "ppm by mass".

[0081]

[0082] [Making of molten metal]

[0083] A metal material in which 4.5% by mass of Al, 4.0% by mass of Ca, 0.3% by mass of Si, 0.3% by mass of Mn, and 0.6% by mass of mischmetal (Mm) were added to Mg was inserted into the crucible, and placed in the Ar High-frequency induction melting is carried out in the atmosphere, and the molten alloy (molten metal) is obtained by melting at a temperature of 750 to 850°C.

[0084] [Making of castings]

[0085] Next, the obtained molten alloy (molten metal) is poured into a mold and cast, and an engine block is produced by die casting (DC) casting.

[0086] Next, the obtained engine block was heat-treated at 300° C. for 4 hours to obtain a heat-treated engine block.

[0087] The...

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Abstract

Provided are: a flame-retardant magnesium alloy which is prevented from the occurrence of the molten metal combustion during the melting of the alloy in casting; and a method for producing the flame-retardant magnesium alloy. A magnesium alloy containing a specific element in a specified amount and also containing a specific rare earth element (RE) in a specified amount. The magnesium alloy makes it possible to form an oxide film of the rare earth element (RE) which is dense and thin and is rarely cracked on the outermost surface of a molten metal. More specifically a flame-retardant magnesium alloy which contains, in % by mass, less than 9.0% of Ca, 0.5% or more and less than 5.7% of Al, 1.3% or less of Si, 0.4% or more and less than 1.3% of a rare earth element and a remainder made up by Mg and unavoidable impurities, wherein the requirement represented by the formula: Al+8Ca >= 20.5% is satisfied.

Description

technical field [0001] The invention relates to a flame-retardant magnesium alloy and a manufacturing method thereof. More specifically, it relates to a flame-retardant magnesium alloy which suppresses combustion of molten metal and has erosion resistance, and a method for producing the same. Background technique [0002] Since magnesium is lighter than iron or aluminum, it is being studied as a lightweight alternative to components made of steel or aluminum alloys. As a representative magnesium alloy, for example, a Mg-Al-Zn-Mn alloy (AZ91D alloy) containing 9% by weight of aluminum, 1% by weight of zinc, and 0.3% by weight of manganese (AZ91D alloy), and a magnesium alloy containing 6% by weight of aluminum are known. , a Mg-Al-Mn alloy (AM60B alloy) containing 0.3% by weight of manganese, and the like. [0003] However, since magnesium alloys decrease in strength at high temperatures, there is a problem in expanding to applications requiring heat-resistant strength. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C23/02C22F1/00C22F1/06
CPCC22C23/00C22C23/02C22F1/06C22C1/02
Inventor 家永裕一野坂洋一
Owner HONDA MOTOR CO LTD
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