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Corrosion-resistant and high-temperature creep-resistant die-cast magnesium alloy and prep ration method thereof

A high-temperature and corrosion-resistant technology, applied in the field of lightweight metal materials, can solve the problems of poor corrosion resistance and high temperature creep resistance

Active Publication Date: 2017-05-31
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a corrosion-resistant, high-temperature creep-resistant die-casting magnesium alloy and its preparation method in order to solve the problems of poor corrosion resistance and high-temperature creep resistance of existing cast magnesium alloys

Method used

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  • Corrosion-resistant and high-temperature creep-resistant die-cast magnesium alloy and prep ration method thereof
  • Corrosion-resistant and high-temperature creep-resistant die-cast magnesium alloy and prep ration method thereof
  • Corrosion-resistant and high-temperature creep-resistant die-cast magnesium alloy and prep ration method thereof

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preparation example Construction

[0044] The present invention also provides a method for preparing a corrosion-resistant and high-temperature creep-resistant die-cast magnesium alloy, comprising the following steps:

[0045] Step 1, smelting magnesium source, aluminum source, zinc source, manganese source, mixed rare earth source, ytterbium source, samarium source and strontium source to obtain a uniform alloy liquid;

[0046] Step 2: Pour the alloy liquid obtained in Step 1 into a cold chamber die-casting machine for die-casting to obtain a corrosion-resistant, high-temperature creep-resistant die-cast magnesium alloy

[0047] According to the present invention, the magnesium source, the zinc source, the manganese source, the mixed rare earth source, the ytterbium source, the samarium source and the strontium source are first smelted, the smelting temperature is preferably 730-760°C, and the smelting time is preferably 10-15min, A uniform alloy liquid is obtained; preferably, when the melt temperature is 750...

Embodiment 1

[0054] A corrosion-resistant, high-temperature creep-resistant die-casting magnesium alloy is made of the following components by mass percentage: Al: 8.5wt.%; Zn: 0.5wt.%; Mn: 0.35wt.%; RE: 0.4wt% %; Yb: 1.0 wt.%; Sm: 2.0 wt.%; Sr: 0.2 wt.%; the balance is pure magnesium and inevitable impurities.

[0055] A preparation process of corrosion-resistant and high-temperature creep-resistant magnesium alloy die-casting, the steps are as follows:

[0056] 1) Combine pure magnesium ingot, pure aluminum ingot, pure zinc ingot, magnesium-manganese master alloy containing 2% manganese, magnesium rare earth master alloy containing 20% ​​mixed rare earth, magnesium-ytterbium master alloy containing 15% ytterbium, and 20% samarium The magnesium-samarium master alloy and the magnesium-strontium master alloy containing 15% strontium were smelted at 730°C, and stirred for 10 minutes to obtain a uniform alloy liquid;

[0057] 2) The furnace temperature was raised to 750°C, and argon was intr...

Embodiment 2

[0062] A corrosion-resistant, high-temperature creep-resistant die-cast magnesium alloy is made of the following components by mass percentage: Al: 9.0wt.%; Zn: 0.8wt.%; Mn: 0.35wt.%; RE: 0.8wt% %; Yb: 1.5 wt. %; Sm: 3.0 wt. %; Sr: 0.8 wt. %; the balance is pure magnesium and inevitable impurities.

[0063] A preparation process of corrosion-resistant and high-temperature creep-resistant magnesium alloy die-casting, the steps are as follows:

[0064] 1) Combine pure magnesium ingot, pure aluminum ingot, pure zinc ingot, magnesium-manganese master alloy containing 2% manganese, magnesium rare earth master alloy containing 20% ​​mixed rare earth, magnesium-ytterbium master alloy containing 15% ytterbium, and 20% samarium The magnesium-samarium master alloy and the magnesium-strontium master alloy containing 15% strontium were smelted at 740 ° C, and stirred for 15 minutes to obtain a uniform alloy liquid;

[0065] 2) The furnace temperature was raised to 750°C, and argon was in...

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Abstract

The invention provides a corrosion-resistant and high-temperature creep-resistant die-cast magnesium alloy and a prep ration method thereof and belongs to the technical field of light metal materials. The die-cast magnesium alloy comprises the following components in percentages by mass: 7.0-11.5wt.% of Al, 0.5-2.0wt.% of Zn, 0.3-0.4wt.% of Mn, 0.2-2.5wt.% of RE, 0.1-3.3wt.% of Yb, 0.1-5.8wt.% of Sm, 0.1-2.0wt.% of Sr and the balance of Mg and inevitable impure elements, wherein RE is mixed rare earth. The invention also provides a preparation method of the corrosion-resistant and high-temperature creep-resistant die-cast magnesium alloy. A test verifies that in a condition of the applied stress is 50MPa and the testing temperature is 150 DEG C, the 100h steady state creep rate of the magnesium alloy is 1.81*10<9> / s and 100h creep strain is 0.18%; through a neutral salt spray test by 5% NaCl for 100h at 35 DEG C, the corrosion rate is 0.055mg / cm<2>day.

Description

technical field [0001] The invention belongs to the technical field of lightweight metal materials, and in particular relates to a corrosion-resistant, high-temperature creep-resistant die-cast magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloy is currently the lightest structural material with a density of 1.75-1.90g / cm 3 , only 1 / 4 of steel and 2 / 3 of aluminum alloy. Compared with other metal materials, magnesium alloys have high specific strength, specific stiffness, good machinability, electromagnetic protection properties, damping properties and thermal conductivity, and are easy to recycle. With the current shortage of iron ore, titanium ore and aluminum ore resources, the development and utilization of magnesium as an alternative material has become an inevitable trend. Therefore, magnesium alloys are known as "21st century commercial green environmental protection and ecological metal structural materials", and are widel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22C1/03C22C1/06C22F1/02C22F1/06
CPCC22C1/03C22C1/06C22C23/02C22F1/02C22F1/06
Inventor 孟健张德平张栋栋邱鑫杨强卜繁强管凯佟立波程丽任刘孝娟
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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