3D printing aluminum lithium alloy, preparing method of 3D printing aluminum lithium alloy and part printing method of 3D printing aluminum lithium alloy

A technology of 3D printing and printing aluminum, which is applied in the direction of additive processing, etc., can solve the problems of low strength, cracks caused by aluminum-lithium alloy, and low density, and achieve the effect of smooth surface, improved strength, plastic toughness, and high density

Active Publication Date: 2019-08-20
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, 3D printing aluminum-lithium alloys have problems such as cracks, low density, and low strength, which limit the industrial promotion and application of aluminum-lithium alloy additive manufacturing technology.

Method used

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  • 3D printing aluminum lithium alloy, preparing method of 3D printing aluminum lithium alloy and part printing method of 3D printing aluminum lithium alloy
  • 3D printing aluminum lithium alloy, preparing method of 3D printing aluminum lithium alloy and part printing method of 3D printing aluminum lithium alloy
  • 3D printing aluminum lithium alloy, preparing method of 3D printing aluminum lithium alloy and part printing method of 3D printing aluminum lithium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The weight percentage of each component of the 3D printing aluminum-lithium alloy powder is: Li: 1.1%; Cu: 3.7%; Mg: 0.6%; Ag: 0.4%; Cr: 0.08%; Zr: 0.3%; Y: 0.10%; Er Sc: 0.3%; Ru: 0.05%; Ti: 0.8%, the balance being Al and unavoidable impurities.

[0028] Preparation method of aluminum-lithium alloy:

[0029] (1) Powder preparation: The 3D printed aluminum-lithium alloy powders are mixed and vacuum smelted, and the aluminum-lithium alloy powders are obtained by gas atomization: the temperature of vacuum smelting is 750°C, and the pressure in the melting furnace is 0.5MPa; atomization The pressure is 4.5MPa, and argon is used as a protective gas to prevent the powder from being oxidized during the atomization process, then dried and sieved, the mesh number of the sieve is 270 mesh, and the prepared alloy powder is spherical (see figure 2 ).

[0030] (2) The sieved alloy powder was placed in an argon atmosphere, and kept at 320° C. for 2.5 hours.

[0031] Pour the alu...

Embodiment 2

[0035] The weight percentage of each component of the 3D printing aluminum-lithium alloy powder is: Li: 0.5%; Cu: 2.5%; Mg: 0.3%; Ag: 0.2%; Cr: 0.06%; Zr: 0.1%; Y: 0.08%; Er Sc: 0.1%; Ru: 0.02%; Ti: 0.1%, the balance being Al and unavoidable impurities.

[0036] Preparation method of aluminum-lithium alloy:

[0037] (1) After mixing the 3D printed aluminum-lithium alloy powders, carry out vacuum smelting, and use the gas atomization method to obtain aluminum-lithium alloy powders: the temperature of vacuum smelting is 750 ° C, the air pressure in the melting furnace is 0.5 MPa; the atomization pressure is 4.5 MPa, argon is used as a protective gas during the atomization process to prevent the powder from being oxidized.

[0038] (2) The prepared alloy powder is spherical, and the mesh of the screen is 270 mesh.

[0039] (3) The sieved alloy powder is placed in an argon atmosphere, and kept at a temperature below 320° C. for 2.5 hours.

[0040] Pour the aluminum-lithium allo...

Embodiment 3

[0042] The weight percentage of each component of the 3D printing aluminum-lithium alloy powder is: Li: 2.0%; Cu: 5.0%; Mg: 1.2%; Ag: 0.8%; Cr: 0.1%; Zr: 0.5%; Y: 0.14%; Er Sc: 0.5%; Ru: 0.08%; Ti: 1.5%, the balance being Al and unavoidable impurities.

[0043] Preparation method of aluminum-lithium alloy:

[0044] (1) After mixing the 3D printed aluminum-lithium alloy powders, carry out vacuum smelting, and use the gas atomization method to obtain aluminum-lithium alloy powders: the temperature of vacuum smelting is 750 ° C, the air pressure in the melting furnace is 0.5 MPa; the atomization pressure is 4.5 MPa, argon is used as a protective gas during the atomization process to prevent the powder from being oxidized.

[0045] (2) The prepared alloy powder is spherical, and the mesh of the screen is 270 mesh.

[0046] (3) The sieved alloy powder is placed in an argon atmosphere, and kept at a temperature below 320° C. for 2.5 hours.

[0047] Pour the aluminum-lithium alloy...

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Abstract

The invention discloses a 3D printing aluminum lithium alloy, a preparing method of the 3D printing aluminum lithium alloy and a part printing method of the 3D printing aluminum lithium alloy. The 3Dprinting aluminum lithium alloy comprises, by mass percent, 0.5 to 2.0% of Li, 2.5 to 5.0% of Cu, 0.3 to 1.2% of Mg, 0.2 to 0.8% of Ag, 0.06 to 0.1% of Cr, 0.1 to 0.5% of Zr, 0.08 to 0.14% of Y, 0.02to 0.08% of Er, 0.1 to 0.5% of Sc, 0.02 to 0.08% of Ru, 0.1 to 1.5% of Ti and the balance Al. The obtained alloy sample is smooth in surface, free of obvious cracks, and high in compactness, the tensile strength is 558 MPa, the yield strength is 496 MPa, and the ductility is 11%.

Description

technical field [0001] The invention belongs to the technical field of special materials for additive manufacturing (commonly known as 3D printing), and specifically relates to a 3D printing aluminum-lithium alloy, a preparation method thereof and a part printing method thereof. Background technique [0002] Aluminum-lithium alloys add lithium as an alloying element to aluminum alloys. Lithium is the lightest metal element. Due to the demand for lightweight and high-strength materials in the aerospace field, aluminum-lithium alloys have outstanding advantages compared with other traditional aluminum alloys. [0003] Additive Manufacturing (AM, also known as 3D printing) is a process that uses metal powder to prepare metal parts layer by layer. Compared with traditional production methods, AM can produce completely dense near- Net shape components solve the forming of many complex structural parts, and greatly reduce the processing procedures and shorten the processing cycle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/16C22C1/02B22F9/08B33Y70/00
CPCB22F9/082B33Y70/00C22C1/026C22C21/16
Inventor 李瑞迪李平袁铁锤王敏卜牛朋达张志坚
Owner CENT SOUTH UNIV
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