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High-sphericity Inconel 625 alloy powder and preparation method and application thereof

A technology of alloy powder and high sphericity, applied in the field of additive manufacturing, can solve the problems affecting the forming quality of 3D printing parts, small packing density of spherical particles, low relative density of formed parts, etc., achieving high sphericity and good powder fluidity , the effect of high loose packing density

Active Publication Date: 2015-12-16
SHANGHAI RES INST OF MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The powder with high particle sphericity has good fluidity, even for relatively fine powder, the conveying process is relatively smooth. On the contrary, the powder with low particle sphericity has poor fluidity, resulting in uneven powder spreading or unsmooth powder feeding, which ultimately affects Forming quality of 3D printed parts
In addition, due to the loose surface and internal structure of the non-spherical powder, there are certain pores defects inside the 3D printed part of the non-spherical powder, while the internal pores of the formed part of the spherical powder are few or even non-existent.
[0008] Although the fluidity of the powder with high particle sphericity is good, the packing density of spherical particles is small and the gap is large, which makes the relative density of the formed part small, and the spherical particles are tangent to each other, which affects the forming quality

Method used

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  • High-sphericity Inconel 625 alloy powder and preparation method and application thereof
  • High-sphericity Inconel 625 alloy powder and preparation method and application thereof
  • High-sphericity Inconel 625 alloy powder and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0038] Adopt the following steps to prepare high sphericity Inconel625 alloy powder:

[0039] (1) Alloy remelting: Put 50kg of Inconel625 alloy raw material into vacuum induction furnace for melting, the alloy composition is Ni: 61%, Cr: 21%, Mo: 9%, Nb: 3.5%, Fe: 3.5%, Al: ≤ 0.4%, Ti: ≤0.4%, Mn: ≤0.5%, C: ≤0.1%, P: ≤0.015%, S: ≤0.015%. The vacuum degree of the melting furnace is 3.2MPa, and the melting temperature is controlled at 1500-1600°C. After the raw materials are completely melted, keep the temperature for 20 minutes, and at the same time, heat the middle leakage bag to 1000-1100°C;

[0040] (2) Add Si element: Add 275g of Si element additive (0.55%wt%) in the Inconel625 alloy melt smelted in step (1), continue smelting for 15 minutes, and pour the alloy melt into the middle leakage bag;

[0041] (3) 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 th...

Embodiment 2

[0045] Adopt the following steps to prepare high sphericity Inconel625 alloy powder:

[0046] (1) Alloy remelting: Put 50kg of Inconel625 alloy raw material into vacuum induction furnace for melting, the alloy composition is Ni: 62%, Cr: 22%, Mo: 9%, Nb: 3.7%, Fe: 3.7%, Al: ≤ 0.4%, Ti: ≤0.4%, Mn: ≤0.5%, C: ≤0.1%, P: ≤0.015%, S: ≤0.015%. The vacuum degree of the melting furnace is 3.2MPa, and the melting temperature is controlled at 1500-1600°C. After the raw materials are completely melted, keep the temperature for 20 minutes, and at the same time, heat the middle leakage bag to 1000-1100°C;

[0047] (2) Add Si element: add 300g of Si element additive (0.60wt%) in the Inconel625 alloy melt smelted in step (1), continue smelting for 15 minutes, and pour the alloy melt into the middle leakage bag;

[0048] (3) 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...

Embodiment 3

[0052] Adopt the following steps to prepare high sphericity Inconel625 alloy powder:

[0053] (1) Alloy remelting: put 50kg of Inconel625 alloy raw material into vacuum induction furnace for melting, the alloy composition is Ni: 61%, Cr: 22%, Mo: 9%, Nb: 4.0%, Fe: 4.0%, Al: ≤ 0.4%, Ti: ≤0.4%, Mn: ≤0.5%, C: ≤0.1%, P: ≤0.015%, S: ≤0.015%. The vacuum degree of the melting furnace is 3.2MPa, and the melting temperature is controlled at 1500-1600°C. After the raw materials are completely melted, keep the temperature for 20 minutes, and at the same time, heat the middle leakage bag to 1000-1100°C;

[0054] (2) Add Si element: Add 325g of Si element additive (0.65wt%) in the Inconel625 alloy melt smelted in step (1), continue smelting for 15 minutes, and pour the alloy melt into the middle leakage bag;

[0055] (3) 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...

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Abstract

The invention relates to high-sphericity Inconel 625 alloy powder and a preparation method and application thereof. According to the method, vacuum smelting technology is adopted, the Si content is controlled to improve the sphericity of Inconel 625 alloy powder particles, an ultrasonic vibration and airflow classification method is applied for matching the powder of different particle sizes, and the Inconel 625 alloy powder applicable to different metal 3D printing technologies is obtained through preparation. Compared with the prior art, the obtained Inconel 625 alloy powder has the beneficial effects of being uniform in component, low in impurity content, high in sphericity degree, optimized in particle size distribution and the like, the requirement of different metal 3D printing technologies for the Inconel 625 alloy powder material is met, and the application field of the metal material increasing manufacturing is expanded.

Description

technical field [0001] The invention relates to a method for preparing an alloy powder, in particular to a high-sphericity Inconel625 alloy powder and its preparation method and application, belonging to the field of additive manufacturing. Background technique [0002] 3D printing technology is based on the designed three-dimensional digital model, through the 3D printing equipment to increase the material layer by layer to manufacture three-dimensional parts products, this layer-by-layer accumulation forming technology is also called additive manufacturing technology. 3D printing technology integrates cutting-edge technologies in many fields such as digital modeling, laser technology, electromechanical control technology, information technology, and material science, and is known as the core technology of the third industrial revolution. In recent years, 3D printing technology has been gradually applied to the manufacture of actual products, and the 3D printing technology ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08B22F1/00C22C19/05C22C1/02B22F3/105
Inventor 吴文恒杨启云胡浩仲守亮闵国全周伟民
Owner SHANGHAI RES INST OF MATERIALS CO LTD
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