Aluminum alloy material for high-performance thin-wall 3D printing sand casting and preparation method thereof

An aluminum alloy material and 3D printing technology, applied in the field of aluminum alloy materials, can solve the problems of coarse structure of sand casting aluminum alloy, slow cooling rate of sand mold, and high resin content of sand mold, and achieve less pore defects, good casting fluidity, and eutectic. Silicon fine and uniform effect

Inactive Publication Date: 2020-11-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, due to the complex structure of the sand mold, the green sand mold formed by 3D printing has the characteristics of thin walls, multiple cavities, and special shapes. The current cast aluminum alloy series materials have poor fluidity, which makes it difficult to fill the mold in some areas during the pouring process, resulting in casting defects. ;The cooling speed of the sand mold is slow, the structure of the sand cast aluminum alloy is coarse, the dendrites are developed, and the sand mold resin content of 3D printing is high, which is easy to form pore defects, resulting in low mechanical properties
As a new rapid casting technology under development, there is currently no aluminum alloy material specially developed for it

Method used

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  • Aluminum alloy material for high-performance thin-wall 3D printing sand casting and preparation method thereof
  • Aluminum alloy material for high-performance thin-wall 3D printing sand casting and preparation method thereof
  • Aluminum alloy material for high-performance thin-wall 3D printing sand casting and preparation method thereof

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preparation example Construction

[0060] The present invention also provides a method for preparing the aluminum alloy material for thin-walled 3D printing sand casting, comprising the following steps:

[0061] Step 1: batching, preparing A356 aluminum ingot, Al-10Zr master alloy, Al-10Sr master alloy, Al-2Sc master alloy and Al-5Ti-B master alloy.

[0062] Step 2: Add A356 aluminum ingot into the crucible, put it into the resistance furnace, and the resistance furnace is raised to 730-750°C in the order of 100°C each time. After the furnace material is completely melted, add Al-10Zr master alloy and Al-2Sc For the intermediate alloy, stir with a stirring rod for 3-5 minutes to ensure that the ingredients are even;

[0063] Step 3: When the temperature of the molten aluminum is stable at 710-730°C, add the Al-5Ti-B master alloy, stir until it is completely melted, and then let it stand for 5-15 minutes;

[0064] Step 4: When the temperature rises to 710-730°C, add Al-10Sr master alloy, stir until it is comple...

Embodiment 1

[0073] A high-performance aluminum alloy material for thin-walled 3D printing sand casting, its main components and mass percentages are as follows: Si: 6.5%; Mg: 0.35%; Ti: 0.136%; Sr: 0.031%; Fe: 0.138%; Zr : 0.16%; Sc: 0.15%; other unavoidable impurity elements ≤ 0.10%; the balance is Al.

[0074] Step 1: batching, preparing A356 aluminum ingot, Al-10Zr master alloy, Al-10Sr master alloy, Al-2Sc master alloy and Al-5Ti-B master alloy.

[0075] Step 2: Add A356 aluminum ingot into the crucible and put it into the resistance furnace. The resistance furnace is raised to 750°C in the order of 100°C each time. After the furnace material is completely melted, add Al-10Zr intermediate alloy and Al-2Sc intermediate Alloy, stir with a stirring rod for 3 minutes to ensure that the ingredients are even;

[0076] Step 3: When the temperature of the molten aluminum is stable at 710°C, add the Al-5Ti-B master alloy, stir until it is completely melted, and then let it stand for 5 minutes...

Embodiment 2

[0084] A high-performance aluminum alloy material for thin-walled 3D printing sand casting, its main components and mass percentages are as follows: Si: 7.12%, Mg: 0.38%; Ti: 0.05%; Sr: 0.038%; Fe: 0.2%; Zr : 0.25%; Sc: 0.3%; other unavoidable impurity elements ≤ 0.10%; the balance is Al.

[0085] Step 1: batching, preparing A356 aluminum ingot, Al-10Zr master alloy, Al-10Sr master alloy, Al-2Sc master alloy and Al-5Ti-B master alloy;

[0086] Step 2: Add A356 aluminum ingot into the crucible, put it into the resistance furnace, and the resistance furnace is raised to 740 °C in the order of 100 °C each time. After the furnace material is completely melted, add Al-10Zr master alloy and Al-2Sc master alloy , Stir for 3 minutes with a stirring rod to ensure that the ingredients are even;

[0087] Step 3: When the temperature of the molten aluminum is stable at 715°C, add the Al-5Ti-B master alloy, stir until it is completely melted, and then let it stand for 10 minutes;

[0088...

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Abstract

The invention discloses an aluminum alloy material for high-performance thin-wall 3D printing sand casting and a preparation method thereof, and relates to the technical field of aluminum alloy production. The material comprises the following components of, in percentage by mass, 6.5%-8% of Si, 0.25%-0.45% of Mg, 0.05%-0.16% of Ti, 0.01%0-0.04% of Sr, 0.1%-0.2% of Fe, 0.16%-0.6% of Zr, 0%-0.4% ofSc, less than or equal to 0.10% of other inevitable impurity elements, and the balance Al. In addition, the invention further discloses the preparation method of the high-performance aluminum alloy. According to the alloy, the contents of Si, Mg, Sr, Ti, Zr and Sc are controlled, so that the alloy has good fluidity, a cast 3D printing sand mold casting is fine and uniform in structure, the strength and toughness of the alloy are remarkably improved, and the requirement of thin-wall 3D printing sand mold casting market development can be well met.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy materials, in particular to an aluminum alloy material for high-performance thin-walled 3D printing sand casting and a preparation method thereof. Background technique [0002] With the rapid development of modern industry, the scale of the casting market continues to expand, and the requirements for product complexity and manufacturing flexibility are getting higher and higher. Traditional casting can no longer meet the market's demand for fast delivery and high-complexity products. The 3D printing sand casting formed by the fusion of 3D printing and traditional resin sand casting has become one of the main development directions of casting. 3D printing sand casting can manufacture highly complex products and can be manufactured quickly, especially for the development and production of complex parts (such as automobile cylinder blocks, cylinder heads, etc.). Due to the needs of environmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/03C22F1/043
CPCC22C1/026C22C1/03C22C21/02C22F1/002C22F1/043
Inventor 朱德智赖晓玉陈维平詹泉泉徐伟业
Owner SOUTH CHINA UNIV OF TECH
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