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Alterant containing aluminum-magnesium alloy rare-earth phase, its production and use

A technology of aluminum-magnesium alloys and modifiers, which is applied in the field of preparation of modifiers, can solve the problem of hindering the process of rare earth microalloying of aluminum-magnesium alloys, the decrease of impact toughness and elongation, and the inability to effectively improve the morphology of acicular phases To achieve the effect of promoting practical application, improving strength and plastic processing performance, and improving comprehensive performance

Active Publication Date: 2009-01-07
TIANJIN DONGYI MAGNESIUM PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Wang Lishi of Huazhong University of Science and Technology mentioned in the title "Influence of MM on AZ91 Casting Properties" published in "Special Casting and Nonferrous Alloys" No. 3, 2002, that Ce-rich mixed rare earths can significantly improve the casting state of AZ91 alloys structure, improve the hardness and strength of the alloy, but due to the appearance of the needle-like rare earth phase, the impact toughness and elongation decrease, and solution aging cannot effectively improve the morphology of the needle-like phase
Although the rare earth phase morphology problem in aluminum-magnesium alloys has attracted the attention of scholars at home and abroad, it has not been resolved for a long time, which seriously hinders the process of rare earth microalloying in aluminum-magnesium alloys.

Method used

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  • Alterant containing aluminum-magnesium alloy rare-earth phase, its production and use
  • Alterant containing aluminum-magnesium alloy rare-earth phase, its production and use
  • Alterant containing aluminum-magnesium alloy rare-earth phase, its production and use

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Experimental program
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Effect test

Embodiment 1

[0018] Rinse the cast steel crucible and metal mold with paint, the paint is made of Al(OH) 3 、H 3 PO 4 , water glass (Na 2 SiO 3 ) and water in a molar ratio of 3:1:1:200, the specific steps are as follows: (1) uniformly mix block industrial pure Mg, Sb, P in a molar ratio of 3:1:1 Put it into the crucible, put the crucible and the metal mold into the induction furnace; (2) evacuate to 6×10 -3 Below, rush into argon; (3) start heating, the heating rate is 10°C / min; (4) the melting temperature is 660°C, after the alloy is completely melted, keep warm for 60min, and the melt is poured into the metal mold in the induction furnace (5) With the furnace cooling to below 200°C, take out the metal mold from the induction furnace to obtain the desired modifier Mg 3 SbP.

Embodiment 2

[0020] Rinse the cast steel crucible and metal mold with paint, the paint is made of Al(OH) 3 、H 3 PO 4 , water glass (Na 2 SiO 3 ) and water are prepared in a molar ratio of 3:1:1:200. (1) Evenly mix block industrial pure Mg, Sb, P with a molar ratio of 4:1.2:1 and put them into the crucible, put the crucible and the metal mold into the induction furnace ;(2) Vacuumize to 6×10 -3 Below, flush into CO 2 and SF 6 (3) Start heating with a heating rate of 15°C / min; (4) The melting temperature is 700°C. After the alloy is completely melted, keep it warm for 30 minutes, and the melt is poured into the metal mold in the induction furnace; ( 5) Cool down to below 200°C with the furnace, take out the mold from the induction furnace, and obtain the desired modifier Mg 4 Sb 1.2 p.

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Abstract

This invention relates to a kind of alterant which containing aluminium magnesium alloy rare earth and its preparation method and its application, the alterant is composed of the following element at mol ratio: MgxSbyP, among them x= 1-6, y = 1-2. The preparation method includes the following steps, (1) mixing the industrially pure Mg, Sb , P block at the mol ratio of 1-6:1-2:1, putting them in the pot, then putting the pot and the metal mould inside the induction furnace (2) pumping vacuum till it below 6*10-3 ,filling the protecting gas (3) begin to heat , the heat rate is 10-20DEG C / min; (4) the smelting temperature is 650-750DEG C, heat preservation 30-90min after all of alloy melting, the melting is poured in the metal mould in the induction furnace (5) the temperature cools down with the stove to be below 200DEG C, takes the mould out of the metal mold in induction furnace, then gets the alterant. This invention has controlled the form of the rare earth effectively, it has resolved the problem of the needle-like rare earth form in the process that the aluminium rare earth microalloy magnesium alloy, it brings the effect of the rare-earth element into full play, and improves the process function of the alloy such as room temperature tenacity, intensity and plasticity of simultaneous in a wide margin.

Description

technical field [0001] The invention relates to a modification agent for rare earth phase in aluminum-magnesium alloy, and also relates to a preparation method and application of the modification agent for rare earth phase in aluminum-magnesium alloy. Background technique [0002] Magnesium alloy is currently the lightest metal structural material available in industry, with high specific strength and specific stiffness, low processing energy, and excellent damping and shock absorption and electromagnetic shielding performance, easy to recycle and cut, high fatigue strength, integrated structure , functionality in one, has the incomparable advantages of other metal materials and engineering plastics. Therefore, magnesium alloys have broad application prospects in many fields such as vehicles, electronic devices, aerospace, national defense, office and sporting goods, and are known as the sustainable development "green project" with the most development and application potent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/02
Inventor 李庆奎关绍康王东军马庆波石广新
Owner TIANJIN DONGYI MAGNESIUM PROD
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