High-strength high-toughness heat-resistant aluminum-iron alloy and 3D printing method thereof

A high-strength, high-toughness, aluminum alloy technology, applied in the field of 3D printing, can solve the problems of limiting the use range of Al-Si alloy, high temperature performance decline, grain growth and other problems, to improve room temperature and high temperature mechanical properties, improve high temperature performance, Effect of room temperature strength and high temperature strength improvement

Active Publication Date: 2021-09-24
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the research and development process of aluminum alloy powder for additive manufacturing, Al-Si alloys can be successfully printed and formed at present. The temperature range of Al-Si alloys that can be successfully printed and formed is generally below 150 ° C, and when the temperature is higher than 150 ° C Grain growth and phase transformation occur, and the high-temperature performance drops sharply, which severely limits the application range of Al-Si alloys in high-temperature fields

Method used

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  • High-strength high-toughness heat-resistant aluminum-iron alloy and 3D printing method thereof
  • High-strength high-toughness heat-resistant aluminum-iron alloy and 3D printing method thereof
  • High-strength high-toughness heat-resistant aluminum-iron alloy and 3D printing method thereof

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Experimental program
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Effect test

Embodiment 1

[0033] The composition of a high-strength heat-resistant aluminum-iron alloy includes by mass percentage:

[0034] Fe iron 8.9%, Cr chromium 1.0%, Ta tantalum 0.2%, cerium Ce 0.1%, the rest is Al aluminum and unavoidable impurities.

[0035] The above 3D printing heat-resistant aluminum alloy powder, its preparation method is: ultrasonic stirring vacuum melting, using high-purity argon supersonic atomization to make powder, the melting temperature is 850 ℃, the pressure in the melting furnace is 0.8MPa, using high-purity argon Supersonic gas atomization of metal droplets as a medium can obtain more than 95% spherical or spherical powder. The high-iron aluminum alloy is prepared by the selective laser melting method, the powder particle size range is 15-53μm, and the corresponding process parameters are: The scanning distance is 120 μm, the powder coating thickness is 30 μm, and the scanning strategy is checkerboard scanning. The printed samples were subjected to stress-relie...

Embodiment 2

[0037] The composition of a high-strength heat-resistant aluminum-iron alloy includes by mass percentage:

[0038] Fe iron 8.5%, Cr chromium 2.0%, Ta tantalum 0.2%, niobium 0.2%, cerium Ce 0.12%, erbium Er 0.08%, the rest is Al aluminum and unavoidable impurities.

[0039]The above 3D printing heat-resistant aluminum alloy powder, its preparation method is: ultrasonic stirring vacuum melting, using high-purity argon supersonic atomization to make powder, the melting temperature is 850 ℃, the pressure in the melting furnace is 0.8MPa, using high-purity argon Supersonic gas atomization of metal droplets as a medium can obtain more than 95% spherical or spherical powder. The high-iron aluminum alloy is prepared by the selective laser melting method, the powder particle size range is 15-53μm, and the corresponding process parameters are: The scanning distance is 120 μm, the powder coating thickness is 30 μm, and the scanning strategy is checkerboard scanning. The printed samples...

Embodiment 3

[0041] The composition of a high-strength heat-resistant aluminum-iron alloy includes by mass percentage:

[0042] Fe iron 8.0%, Cr chromium 1.0%, Ta tantalum 0.2%, cerium Ce 0.12%, holmium Ho 0.2%, the rest is Al aluminum and unavoidable impurities.

[0043] The above 3D printing heat-resistant aluminum alloy powder, its preparation method is: ultrasonic stirring vacuum melting, using high-purity argon supersonic atomization to make powder, the melting temperature is 850 ℃, the pressure in the melting furnace is 0.8MPa, using high-purity argon Supersonic gas atomization of metal droplets as a medium can obtain more than 95% spherical or spherical powder. The high-iron aluminum alloy is prepared by the selective laser melting method, the powder particle size range is 15-53μm, and the corresponding process parameters are: The scanning distance is 120 μm, the powder coating thickness is 30 μm, and the scanning strategy is checkerboard scanning. The printed samples were subject...

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Abstract

The invention relates to the field of 3D printing, in particular to a high-strength high-toughness heat-resistant aluminum-iron alloy and a 3D printing method thereof. The high-strength high-toughness heat-resistant aluminum-iron alloy comprises the following raw materials in percentage by mass: 2.0%-9.0% of Fe, 1.0%-3.5% of Cr, 0.2%-0.8% of M, 0.1%-0.5% of rare earth elements and the balance of Al and inevitable impurities. M is selected from at least one of Ta and Nb; the high-strength high-toughness heat-resistant aluminum-iron alloy is prepared through a laser 3D printing process. After optimization, the density of the product can reach 98% or above, the tensile strength is about 680 MPa, the product is free of plasticity, the tensile strength is about 495 MPa and the ductility is about 5.5% after proper stress relief annealing and plasticity and toughness control treatment, and the tensile strength can still be about 245 MPa and the ductility is about 8.8% at the high temperature of 315 DEG C.

Description

technical field [0001] The invention relates to the field of 3D printing, in particular to a high-strength, high-toughness heat-resistant aluminum-iron alloy and a 3D printing method thereof. Background technique [0002] Additive manufacturing technology is a three-dimensional parts rapid prototyping technology that designs various complex geometric shapes based on three-dimensional models, and uses metals, polymers, ceramics, and plastics as raw materials to form layers of layers. This technology integrates CAD, optics, numerical control and materials and other disciplines, and has broad application prospects in medical, construction, aerospace, electronics and other fields. [0003] In the research and development process of aluminum alloy powder for additive manufacturing, Al-Si alloys can be successfully printed and formed at present. The temperature range of Al-Si alloys that can be successfully printed and formed is generally below 150°C, and when the temperature is h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00B22F9/08B22F10/28B22F10/64B33Y70/00B33Y10/00
CPCC22C21/00B22F9/082B22F10/28B22F10/64B33Y70/00B33Y10/00Y02P10/25
Inventor 陈超吴谊友张桃梅耿赵文李丹张家琪周科朝
Owner CENT SOUTH UNIV
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