Preparation method for Inconel718 alloy powder used for 3D printing technology

A technology of alloy powder and 3D printing, which is applied in the field of additive manufacturing, can solve the problems of unsuitable 3D printing technology, high powder inclusion content, coarse powder particle size, etc., and achieve small deformation, low impurity and oxygen content, and high bulk density. Effect

Inactive Publication Date: 2018-02-23
SHANGHAI RES INST OF MATERIALS CO LTD
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  • Abstract
  • Description
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Problems solved by technology

Compared with the two, the particle size of the powder produced by the atomization method is finer, but the traditional atomization process is easy to cause high powder inclusion content, satellite ball, hollow ball powder; the powder prepared by the plasma rotating electrode method has high sphericity and high purity, but The particle size of the powder is relatively coarse, which is not suitable for 3D printing technology. Therefore, it is very important to adopt a new atomization technology and integrate a series of powder treatment processes to provide a method for preparing alloy powder for 3D printing.

Method used

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  • Preparation method for Inconel718 alloy powder used for 3D printing technology
  • Preparation method for Inconel718 alloy powder used for 3D printing technology
  • Preparation method for Inconel718 alloy powder used for 3D printing technology

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preparation example Construction

[0036] A preparation method of Inconel718 alloy powder for 3D printing technology, comprising the following steps:

[0037] (1) Alloy smelting: vacuum induction smelting is carried out on the Inconel718 alloy raw material to obtain an alloy melt;

[0038] (2) Atomized pulverization: Pour the alloy melt into the middle leakage bag, open the leakage valve, and the alloy melt flows into the gas atomization furnace freely through the leak hole at the bottom of the middle leakage bag, and is impacted by the vortex-type high-speed airflow Under the action, the alloy melt is crushed into fine droplets, cooled and solidified to obtain Inconel718 alloy powder, which lands at the bottom of the atomization tower, and then is brought into the powder collection device under the cyclone by the gas;

[0039] (3) Powder screening: Ultrasonic vibration screening is performed on the Inconel718 alloy powder obtained in step (2), so that the proportion of powder above 53 μm is no more than 5%; th...

Embodiment 1

[0048] The following steps are used to prepare Inconel718 alloy powder for SLM technology:

[0049] (1) Alloy remelting: Put 50kg of Inconel718 alloy raw material into vacuum induction furnace for melting, the alloy composition is Cr: 18.5%, Ni: 52.4%, Mo: 2.91%, Al: 0.45%, Ti: 0.88%, Nb: 4.75 %~5.50%, C≤0.004%, Co≤0.5%, Si≤0.15%, Mn≤0.12%, P≤0.003%, S≤0.003%, Mg≤0.005%, B≤0.0006%, Cu≤0.015%. Melting furnace vacuum degree 9.6×10 -3 Pa, after the raw materials are completely melted, the temperature of the molten steel is controlled at 1580°C and kept for 20 minutes, while the middle leaking bag is heated to 1130°C;

[0050] (2) Atomization pulverization: open the leakage valve, and the alloy melt flows freely downward into the gas atomization furnace through the leakage hole at the bottom of the middle leakage bag. The atomization pressure in the gas atomization furnace is 4.0MPa. Under the impact of the flow, the alloy melt is crushed into fine droplets, and after cooling an...

Embodiment 2

[0055] The following steps were used to prepare Inconel718 alloy powder for LENS technology:

[0056] (1) Alloy smelting: Put 50kg of Inconel718 alloy raw material into vacuum induction furnace for smelting, the alloy composition is Cr: 20.1%, Ni: 53.9%, Mo: 3.12%, Al: 0.55%, Ti: 0.78%, Nb: 4.95% , C≤0.002%, Co≤0.15%, Si≤0.025%, Mn≤0.025%, P≤0.001%, S≤0.003%, Mg≤0.001%, B≤0.0003%, Cu≤0.017%. Melting furnace vacuum degree 9.2×10 -3 Pa, after the raw materials are completely melted, the temperature of the molten steel is controlled at 1550°C, and the temperature is kept for 20 minutes, and the middle leakage bag is heated to 1150°C at the same time;

[0057] (2) Atomized pulverization: pour the alloy melt into the middle leakage bag, open the leakage valve, the alloy melt flows freely downward into the gas atomization furnace through the leakage hole at the bottom of the middle leakage bag, and the mist in the gas atomization furnace The melting pressure is 5.0MPa. Under the i...

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Abstract

The invention relates to a preparation method for Inconel718 alloy powder used for a 3D printing technology. The preparation method is characterized in that a vacuum induction melting technology and atight coupling gas atomization technology are adopted, an ultrasonic vibrating method and an airflow classifying method are applied to perform particle size distribution on powder, and a vacuum degassing technology is adopted to prepare Inconel718 alloy powder used for a laser selective melting technology. Compared with the prior art, the prepared Inconel718 alloy powder has performance featuressuch as high degree of sphericity, uniform particle size distribution, low oxygen content and low impurity content, meets performance requirements, on a powdered material, of the laser selective melting technology, and promotes development of the metal additive manufacturing technology.

Description

technical field [0001] The invention relates to a method for preparing metal powder, in particular to a method for preparing Inconel718 alloy powder used in 3D printing technology, and belongs to the field of additive manufacturing. Background technique [0002] 3D printing is a manufacturing technology that uses lasers or electron beams, based on three-dimensional modeling, to add accumulation materials layer by layer under computer control to directly form parts quickly and accurately, also known as "additive manufacturing". Additive manufacturing technology does not require traditional tools, fixtures, and multiple processing procedures. Using 3D design data, it can quickly and accurately manufacture parts of any complex shape on one device. Compared with the traditional method of material removal (or deformation) Processing and common special processing technology, additive manufacturing technology has a very high material utilization rate. [0003] Selective Laser Melt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08B22F1/00B33Y70/00C22C19/05B07B9/00B07B1/28
CPCC22C19/055C22C19/056B07B1/28B07B9/00B22F9/082B33Y70/00B07B2230/04B22F2999/00B22F2009/0896B22F1/065B22F1/142B22F2201/20
Inventor 吴文恒吴凯琦卢林王涛杨启云王博亚
Owner SHANGHAI RES INST OF MATERIALS CO LTD
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