Mould casting magnesium alloy

A magnesium alloy, die-casting technology, applied in the field of die-cast magnesium alloy, to achieve the effects of no cracks and defects, good casting performance, good creep performance and corrosion resistance

Inactive Publication Date: 2003-08-06
MITSUBISHI ALUMINUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The alloy of the above-mentioned patent application is produced by a rapid consolidation method, and has a very high breaking load of 290MPa

Method used

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  • Mould casting magnesium alloy
  • Mould casting magnesium alloy
  • Mould casting magnesium alloy

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Embodiment Construction

[0046] The die-cast magnesium alloy of the present invention can be used for: automotive parts around the engine, such as structural parts around the engine, such as cylinder blocks, cylinder heads, cylinder head covers, oil pans, oil pump bodies, oil pump covers, feed pipes, and tanks , such as boxes around the engine such as transmission boxes, shift boxes, chain box slip-in boxes, hinge covers and oil pump covers.

[0047] The aluminum content is limited to "1.5 to 6% by weight" based on the results of the tests described below.

[0048] When the content of aluminum is not more than 6% by weight, most of the aluminum infiltrates into the matrix of magnesium in solid state. The tensile strength of the alloy increases due to solution hardening. Moreover, the creep properties of the alloy are improved due to the network phase structure of the Al-Ca compound crystallized at the grain edges due to the combination with Calcium. Aluminum also improves the castability of the allo...

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Abstract

The present invention provides a magnesium die cast alloy with excellent heat resistance and casting property, and its composition contains (wt%) 1.5-6% of aluminium, 0.3-2% of calcium, 0.01-1% of strontium, 0.1-1% of manganese and the rest is magnesium and inevitable impurity. According to said invention in the above-mentioned composition a rare earth element composition can be added, it can obtain better effect.

Description

field of invention [0001] The present invention relates to a die-cast magnesium alloy having excellent heat resistance and castability. Background of the invention [0002] For the purpose of saving weight, magnesium alloys have recently become a major focus of transportation methods, including automobiles. [0003] Because these magnesium alloys, especially cast magnesium alloys, such as: magnesium-aluminum alloys containing 2 to 6% (by weight) of aluminum (such as AM60B determined in the ASTM [American Society for Testing and meters] standard, AM50A or AM20A) or magnesium-aluminum-zinc alloys containing 8-10% by weight of aluminum and 1-3% by weight of zinc (eg AZ91D as defined in ASTM standards) are well known. These magnesium alloys have good castability and can be used for die casting. [0004] However, when such a magnesium alloy is used for parts around the engine, due to the high temperature of 125 to 175°C, such as: 150°C, the creep strength is low during use, and...

Claims

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Application Information

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IPC IPC(8): C22C23/02
Inventor 大堀纮一中浦祐典坂上武
Owner MITSUBISHI ALUMINUM CO LTD
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