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Iron-rich high-entropy alloy powder material for 3D printing and preparation method thereof

A high-entropy alloy and 3D printing technology, which is applied in metal processing equipment, additive processing, transportation and packaging, etc., can solve the problems of multiple processes and high energy consumption in the two-step atomization method, and achieve high sphericity and oxygen content Low, consistent quality results

Active Publication Date: 2016-09-21
ZHEJIANG ASIA GENERAL SOLDERING & BRAZING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects existing in the prior art, the present invention provides an iron-rich high-entropy alloy powder material for 3D printing and a preparation method thereof, which overcomes the defects of many processes and high energy consumption of the two-step atomization method, and the process is simple and efficient. Easy to control, no pollution to the environment, green and environmental protection

Method used

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  • Iron-rich high-entropy alloy powder material for 3D printing and preparation method thereof
  • Iron-rich high-entropy alloy powder material for 3D printing and preparation method thereof
  • Iron-rich high-entropy alloy powder material for 3D printing and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Firstly, 35.85 kg of Fe ingot, 8.66 kg of Al ingot, 16.69 kg of Cr ingot, 18.92 kg of Co ingot, 13.19 kg of Ni ingot and 6.69 kg of Ni-B alloy were weighed. Then place them in the device schematic in order of melting point from low to high. figure 1 In the intermediate frequency induction furnace 1, the vacuum degree is 1×10 -3Mpa, filled with 1.02 atmospheres of argon, the melting power is 180KW, smelting for 60 minutes, vacuum refining for 10 minutes, then preheating the tundish 4 and draft tube 3 between the medium frequency induction furnace 2 and the atomizer 5 to 700°C , pour the refined liquid into the tundish, turn on the high-pressure argon gas to start atomization, at this time, the argon gas pressure is 3.5MPa, the air velocity is 300m / s, and the metal liquid passes through the tundish at a flow rate of 10Kg / min from a hole diameter of 5.0mm The leaking hole flows out and meets the intersection of supersonic argon gas through the annular gap atomizer to beco...

Embodiment 2

[0032] Firstly, 41.13 kg of Fe ingot, 7.95 kg of Al ingot, 15.32 kg of Cr ingot, 17.36 kg of Co ingot, 12.08 kg of Ni ingot and 6.17 kg of Ni-B alloy were weighed. Then place them in the device schematic in order of melting point from low to high. figure 1 In the intermediate frequency induction furnace 1, the vacuum degree is 1.5×10 -3 Mpa, filled with 1.02 atmospheres of argon, the melting power is 190KW, smelting for 55 minutes and then vacuuming and refining for 12 minutes; then preheat the tundish and draft tube between the medium frequency induction furnace and the atomizer to 700 ° C, and the refined The liquid is poured into the tundish, and the high-pressure argon gas is turned on to start atomization. At this time, the pressure of the argon gas is 3.5MPa, the air velocity is 310m / s, and the metal liquid flows out through the tundish at a flow rate of 11Kg / min from the hole with a diameter of 5.0mm. , passing through the annular gap atomizer and meeting the intersect...

Embodiment 3

[0034] Weigh 45.6 kg of Fe ingot, 7.34 kg of Al ingot, 14.15 kg of Cr ingot, 16.04 kg of Co ingot, 11.41 kg of Ni ingot and 5.40 kg of Ni-B alloy. Then place them in the device schematic in order of melting point from low to high. figure 1 In the intermediate frequency induction furnace 1, the vacuum degree is 1.2×10 -3 Mpa, filled with 1.02 atmospheres of argon, the melting power is 200KW, smelting for 50 minutes and then vacuuming and refining for 15 minutes; then preheat the tundish and draft tube between the medium frequency induction furnace and the atomizer to 700 ° C, and the refined The liquid is poured into the tundish, and the high-pressure argon gas is turned on to start atomization. At this time, the argon gas pressure is 3.5MPa, the air velocity is 320m / s, and the metal liquid flows out through the tundish at a flow rate of 12Kg / min from the hole with a diameter of 5.0mm. , passing through the annular gap atomizer and meeting the intersection point of supersonic ...

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Abstract

The invention discloses an iron-rich high-entropy alloy powder material for 3D printing and a preparation method thereof. The molar ratio of the iron-rich high-entropy alloy powder material FexAlCoCrNiB0.3 is as follows: the molar weight of Fe is 2 to 3, the molar weights of Al, Co, Cr and Ni are 1, the molar ratio of B is 0.3, and B is added in an Ni-B alloy form. The iron-rich high-entropy alloy powder material is prepared through a medium frequency induction melting gas atomization one-step method, namely, a metal liquid subjected to medium frequency induction melting and refining is directly fed into a gas atomization device through a guide tube and a tundish to be atomized for powder material preparation. According to the iron-rich high-entropy alloy powder FexAlCoCrNiB0.3material prepared through the method, a phase structure is composed of solid solutions of simple face-centered cubic and body-centered cubic structures, and a product is good in degree of sphericity, controllable in particle size, uniform in components, low in oxygen content and good in fluidity; and according to the preparation method provided by the invention, the technology is simple, the energy consumption is low, the control is easy, the product quality is stable, and the method is applicable to large-scale industrial production, pollution-free to the environment, and environment-friendly in utilization.

Description

technical field [0001] The invention belongs to an iron-based alloy powder material and a preparation method, in particular to an iron-rich high-entropy alloy powder material for 3D printing and a method for preparing high-entropy alloy powder by a one-step medium-frequency induction melting gas atomization method. Background technique [0002] 3D printing metal powder materials mainly include cobalt-chromium alloys, iron-based superalloys, titanium alloys, and aluminum alloys. 3D printing not only has very strict requirements on the particle size distribution, bulk density, oxygen content, fluidity and other properties of the metal powder material, but also the alloy composition of the metal powder, solid-liquid interface energy, solid phase growth and sintered metal powder. Factors such as the solidification process and the mechanism of densification affect the microstructure of the final product. Since special powders for 3D printing have strict requirements on their geo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00B22F1/00B22F9/08B33Y70/00B33Y40/00
CPCC22C30/00C22C38/06C22C38/52C22C38/54B22F9/082B33Y40/00B33Y70/00B22F2009/0888B22F1/065
Inventor 金霞冒爱琴张腾辉赵杰刘平丁洪波崔良吴彩霞
Owner ZHEJIANG ASIA GENERAL SOLDERING & BRAZING MATERIAL
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