FeCoCrNi series high-entropy alloy selective laser melting in-situ additive manufacturing method and product

A selective laser melting and high-entropy alloy technology, which is applied in the field of alloy materials, can solve problems such as waste, large differences in the melting point and boiling point of simple powder, and large production capacity, and achieve the effects of low price, easy composition modification, and reduced production and R&D costs.

Active Publication Date: 2020-05-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current domestic additive manufacturing powder production system is not perfect, and the alloy powders used for the additive manufacturing of FeCoCrNi high-entropy alloys need to waste huge production capacity for customization
And the composition of the alloy powder is fixed, which is not conducive to the composition adjustment in the process of alloy development
Direct use of elemental powders for in-situ SLM manufacturing also faces the problems of large differences in the melting point and boiling point of each elemental powder, and many defects

Method used

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  • FeCoCrNi series high-entropy alloy selective laser melting in-situ additive manufacturing method and product
  • FeCoCrNi series high-entropy alloy selective laser melting in-situ additive manufacturing method and product
  • FeCoCrNi series high-entropy alloy selective laser melting in-situ additive manufacturing method and product

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Embodiment 1

[0041] A FeCoCrNi system high-entropy alloy selective laser melting in-situ additive manufacturing method, comprising the following steps:

[0042] Step 1, the raw materials are mixed, and the purity is 99.9% 560gFe, 590gCo elemental metal spherical powder (powder particle diameter 15~48 microns) and 1110gNi 50 Cr 50 Alloy spherical powder (powder particle size 15-48 microns) is placed in a three-dimensional mixer and mixed for 4 hours, the cylinder speed is 20r / min, and the uniformly mixed spherical powder is dried in a vacuum dryer for 10 hours at a temperature of 50 degrees Celsius , the vacuum degree is less than the absolute pressure of 10KPa, and it is sealed and stored after drying.

[0043] Step 2, additive preparation, the substrate is made of 316L stainless steel, the size is 250×250×15mm, the surface of the substrate is polished with an angle grinder until there is no oxide, and the oil and dirt on the surface are cleaned with acetone and alcohol respectively. Use...

Embodiment 2

[0055] A FeCoCrNi system high-entropy alloy selective laser melting in-situ additive manufacturing method, comprising the following steps:

[0056] Step 1, the raw materials are mixed, and the purity is 99.9% 560gFe, 590gCo, 442.5gNi elemental metal spherical powder (powder particle size 15-48 microns) and 667.5gNi 20 Cr 80 Alloy spherical powder (powder particle size 15-48 microns) is placed in a three-dimensional mixer and mixed for 2 hours, the cylinder speed is 40r / min, and the uniformly mixed spherical powder is dried in a vacuum dryer for 5 hours at a temperature of 100 degrees Celsius , the vacuum degree is less than the absolute pressure of 10KPa, and it is sealed and stored after drying.

[0057] Step 2, additive preparation, the substrate is made of 316L stainless steel, the size is 250×250×15mm, the surface of the substrate is polished with an angle grinder until there is no oxide, and the oil and dirt on the surface are cleaned with acetone and alcohol respectivel...

Embodiment 3

[0059] A FeCoCrNi system high-entropy alloy selective laser melting in-situ additive manufacturing method, comprising the following steps:

[0060] Step 1, the raw materials are mixed, and the purity is 99.9% 560gFe, 590gCo, 337.1gNi elemental metal spherical powder (powder particle size 15-48 microns) and 772.9gNi 30 Cr 70 Alloy spherical powder (powder particle size 15-48 microns) is placed in a three-dimensional mixer and mixed for 3 hours, the cylinder speed is 30r / min, and the uniformly mixed spherical powder is dried in a vacuum dryer for 8 hours at a temperature of 80 degrees Celsius , the vacuum degree is less than the absolute pressure of 10KPa, and it is sealed and stored after drying.

[0061] Step 2, additive preparation, the substrate is made of 316L stainless steel, the size is 250×250×15mm, the surface of the substrate is polished with an angle grinder until there is no oxide, and the oil and dirt on the surface are cleaned with acetone and alcohol respectively...

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Abstract

The invention provides a FeCoCrNi series high-entropy alloy selective laser melting in-situ additive manufacturing method. The method comprises the following steps: step 1, mixing mixed elemental metal powder with M-X alloy powder and/or N-Y alloy powder, wherein the mixed elemental metal powder at least comprises two of Fe, Co and Ni metal elemental powder, the M element in the M-X alloy powder is the metal element with the highest melting point in a high-entropy alloy, the N metal element in the N-Y alloy powder is the metal element with the lowest melting point in the high-entropy alloy, Xand Y are at least one metal element in the mixed elemental metal powder, and the molar number of each metal element in the mixed metal powder is the same; and step 2, carrying out laser additive manufacturing through laser 3D printing equipment to obtain the FeCoCrNi series high-entropy alloy. The product is good in forming effect and free of air holes and macroscopic cracks.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and in particular relates to a FeCoCrNi series high-entropy alloy selective laser melting in-situ additive manufacturing method and product. Background technique [0002] Due to their excellent mechanical properties and corrosion resistance, high-entropy alloys have been extensively studied in the material field in recent years. However, the high-entropy alloy system is huge, and its specific formation mechanism and strengthening mechanism have not been fully clarified, and research and exploration still need a considerable period of time. The main way to prepare high-entropy alloy samples is vacuum arc melting, but this method can prepare samples with very simple geometric shapes, and cannot prepare samples with complex shapes. Compared with vacuum arc melting and casting, laser additive manufacturing has gradually become the research focus of the material industry due to its strong ada...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04B22F1/00B22F3/105C22C30/00B33Y10/00B33Y80/00
CPCB22F9/04C22C30/00C22C19/07B33Y10/00B33Y80/00B22F2009/041B22F10/00B22F1/065B22F12/30B22F10/34B22F10/28B22F10/36B22F10/32Y02P10/25
Inventor 徐连勇林丹阳荆洪阳韩永典吕小青赵雷
Owner TIANJIN UNIV
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