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Nano Al2O3 reinforced 3D printing aluminum-based composite material and preparation method

An aluminum-based composite material and 3D printing technology, which is applied in the field of metal 3D printing, can solve the problems that the structure and performance of aluminum alloy parts cannot meet the application requirements, and achieve the effect of realizing the degree of densification, shortening the production cycle and high cooling rate.

Pending Publication Date: 2021-12-17
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the advancement of science and technology and the rapid development of industrialization, the structure and performance of traditional casting and forging aluminum alloy parts can no longer meet the application requirements. Modern aluminum alloy preparation technology is gradually developing towards the direction of integrally formed complex shape structural parts.

Method used

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  • Nano Al2O3 reinforced 3D printing aluminum-based composite material and preparation method
  • Nano Al2O3 reinforced 3D printing aluminum-based composite material and preparation method
  • Nano Al2O3 reinforced 3D printing aluminum-based composite material and preparation method

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preparation example Construction

[0024] The invention provides a nano-Al 2 o 3 A preparation method for enhancing 3D printing aluminum-based composite materials, comprising the following steps:

[0025] Step 1, homogeneous mixing of powder

[0026] Nano Al 2 o 3 Mix with Al-based spherical powder according to a certain ratio through a ball mill to obtain a composite powder for printing;

[0027] In step 1, the composite powder is composed of the following raw materials according to mass percentage: 0.1wt% to 30wt% nano-scale Al 2 o 3 and 70wt% to 99.9wt% of Al-based spherical powder, the sum of the mass percentages of the above components is 100%; ball milling is carried out in a liquid environment containing alcohol, the speed of the ball mill is set at 50 to 400rpm, and the intermittent ball milling method is adopted. The actual ball milling The time is 0.5 ~ 20h.

[0028] Step 2, roast the powder and sieve

[0029] After placing the composite powder obtained in step 1 in an oven for heat preservati...

Embodiment 1

[0036] Step 1, homogeneous mixing of powder

[0037] Nano Al 2 o 3 and Al-based spherical powder according to a certain ratio, mixed by a ball mill to obtain a composite powder for printing; the composite powder is 2.25wt% nano-scale Al 2 o 3 and 97.75wt% Al-based spherical powder, the sum of the mass percentages of the above components is 100%; the ball milling is carried out in a liquid environment containing alcohol, the speed of the ball mill is set at 150rpm, and the intermittent ball milling method is adopted. The actual ball milling time is 4h;

[0038] Step 2, roast the powder and sieve

[0039] The composite powder obtained in step 1 was placed in an oven at 80° C. for 4 hours, and then sieved with a 100-mesh sieve.

[0040] Step 3, print shape

[0041] Add the mixed powder to the powder feeding system of the selective laser melting forming equipment, and then spread the powder evenly through the powder spreading roller. , preheating, melting and forming process, ...

Embodiment 2

[0044] Step 1, homogeneous mixing of powder

[0045] Nano Al 2 o 3 and Al-based spherical powder according to a certain ratio, mixed by a ball mill to obtain a composite powder for printing; the composite powder is 0.1wt% nano-scale Al 2 o 3 and 99.9wt% Al-based spherical powder, the sum of the mass percentages of the above components is 100%; the ball milling is carried out in a liquid environment containing alcohol, the speed of the ball mill is set at 50rpm, and the intermittent ball milling method is adopted. The actual ball milling time is 20h;

[0046] Step 2, roast the powder and sieve

[0047] The composite powder obtained in step 1 was placed in an oven at 50° C. for 40 hours, and then sieved with a 600-mesh sieve.

[0048] Step 3, print shape

[0049] Add the mixed powder to the powder feeding system of the selective laser melting forming equipment, and then spread the powder evenly through the powder spreading roller. , preheating, melting and forming process,...

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Abstract

The invention discloses a preparation method of a nano Al2O3 reinforced 3D printing aluminum-based composite material. The preparation method comprises the following steps that 1, nano Al2O3 and Al-based spherical powder are mixed according to a certain proportion through a ball mill to obtain composite powder for printing; 2, the composite powder obtained in the step 1 is placed in a drying oven for heat preservation and then screened through a screen; and 3, the screened mixed powder is added into a powder feeding system of selective laser melting forming equipment, then the powder is evenly laid through a powder laying roller, after each layer of powder is laid, a scanning system prints according to set parameters under the control of a computer, and continuously repeats the scanning to forming process until a three-dimensional part is manufactured, and the selective laser melting forming equipment is adopted for 3D printing forming. The aluminum alloy prepared through the method is compact in structure and fine in grain, and the mechanical property is superior to that of a traditional casting formed part. The invention also provides the composite material prepared by the method.

Description

technical field [0001] The invention relates to the technical field of metal 3D printing, in particular to a nano-Al 2 o 3 Enhanced 3D printing aluminum matrix composites, also involving a nano-Al 2 o 3 Preparation method of enhanced 3D printing aluminum matrix composites. Background technique [0002] With the rapid development of modern science and technology, the strength, toughness and thermal stability of AlSi10Mg alloys are difficult to meet the needs of special working conditions. In order to further expand the application of aluminum matrix composites (English full name AMCs) in high-performance structures, it is necessary to New high-strength aluminum alloys have been intensively and extensively studied. At present, the strengthening and toughening methods of aluminum alloy materials can be divided into continuous fiber reinforcement and particle reinforcement according to the form of reinforcement phase. Among them, ceramic phase particle reinforced AMCs can c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04B22F10/28B33Y10/00B33Y70/10C22C21/00C22C32/00C22C1/05
CPCB22F9/04B22F10/28B33Y10/00B33Y70/10C22C21/00C22C32/0036C22C1/05B22F2009/043Y02P10/25
Inventor 卓龙超刘冬雪尹恩怀徐锦涛张琪琪刘秀利苑博袁学礼李超安占军
Owner XIAN UNIV OF TECH
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