Preparation method of high-performance fine-grain FeCoCrNi alloy

A high-performance, high-entropy alloy technology, applied in the field of alloy materials, can solve the problem of difficult accumulation of deformation energy storage and other problems

Active Publication Date: 2021-10-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The essence of cold-rolled deformation is the movement of dislocations, which are less hindered in the movement of dislocations, which makes it difficult to accumulate deformation energy storage, so it is difficult to produce obvious grain refinement effects in a single annealing

Method used

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  • Preparation method of high-performance fine-grain FeCoCrNi alloy
  • Preparation method of high-performance fine-grain FeCoCrNi alloy
  • Preparation method of high-performance fine-grain FeCoCrNi alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Laser selective melting method to print high-entropy alloys to prepare printed FeCoCrNi alloys

[0045] The printing powder is a gas-atomized spherical powder with an equimolar ratio of FeCoCrNi. The substrate is 316L stainless steel, and the size is 250mm×250mm×15mm. Use acetone and alcohol to clean the oil and dirt on the surface respectively. Sand blast the surface using a sandblasting machine.

[0046] Use the AM-400 laser 3D printing equipment produced by Renishaw to print, and build a block with a size of 10mm×10mm×80mm in the software Renishaw-QuantAM that comes with the Renishaw equipment, with a power of 200W and a layer thickness of 40μm. The rotation angle is 67°, the line spacing is 40μm, and the scanning speed is 740mm / s. Before printing, the printing chamber is evacuated, the oxygen content is lower than 100ppm, and the argon gas is used for protection. After printing, the specimen is cooled with the chamber for 2 hours, and the printed sample is obtaine...

Embodiment 2

[0059] Laser selective melting method to print high-entropy alloys to prepare printed FeCoCrNi alloys

[0060] The printing powder is a gas-atomized spherical powder with an equimolar ratio of FeCoCrNi. The substrate is 316L stainless steel, and the size is 250mm×250mm×15mm. Use acetone and alcohol to clean the oil and dirt on the surface respectively. Sand blast the surface using a sandblasting machine.

[0061] Use the AM-400 laser 3D printing equipment produced by Renishaw to print, and build a block with a size of 10mm×10mm×80mm in the software Renishaw-QuantAM that comes with the Renishaw equipment, with a power of 200W and a layer thickness of 40μm. The rotation angle is 67°, the line spacing is 40μm, and the scanning speed is 740mm / s. Before printing, the printing chamber is evacuated, the oxygen content is lower than 100ppm, and the argon gas is used for protection. After printing, the specimen is cooled with the chamber for 2 hours, and the printed sample is obtaine...

Embodiment 3

[0067] Laser selective melting method to print high-entropy alloys to prepare printed FeCoCrNi alloys

[0068] The printing powder is a gas-atomized spherical powder with an equimolar ratio of FeCoCrNi. The substrate is 316L stainless steel, and the size is 250mm×250mm×15mm. Use acetone and alcohol to clean the oil and dirt on the surface respectively. Sand blast the surface using a sandblasting machine.

[0069] Use the AM-400 laser 3D printing equipment produced by Renishaw to print, and build a block with a size of 10mm×10mm×80mm in the software Renishaw-QuantAM that comes with the Renishaw equipment, with a power of 200W and a layer thickness of 40μm. The rotation angle is 67°, the line spacing is 40μm, and the scanning speed is 740mm / s. Before printing, the printing chamber is evacuated, the oxygen content is lower than 100ppm, and the argon gas is used for protection. After printing, the specimen is cooled with the chamber for 2 hours, and the printed sample is obtaine...

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Abstract

The invention discloses a preparation method of a high-performance fine-grain FeCoCrNi alloy. The preparation method comprises the following steps: step 1, a high-entropy alloy is printed by adopting a selective laser melting method to prepare a printed FeCoCrNi alloy; according to the selective laser melting printing method, gas atomization spherical powder with the equal molar ratio of FeCoCrNi is adopted as a raw material; 2, the printed FeCoCrNi alloy is compressed in the printing direction, and the compressed FeCoCrNi alloy is obtained; and 3, the compressed FeCoCrNi alloy is subjected to annealing for 1.8 h to 2.2 h, and after cooling, the high-performance fine-grain FeCoCrNi alloy is obtained. According to the method, crystal grains can be greatly refined only through one-time compression and annealing circulation, the production cost is greatly reduced, and the machining efficiency is greatly improved. By applying the method, the strength and plasticity of the material can be remarkably improved, and the application range is greatly widened.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and in particular relates to a preparation method of a high-performance fine-grained FeCoCrNi alloy. Background technique [0002] High-entropy alloys are a new type of alloy design concept proposed in recent years, which can suppress the formation of intermetallic compounds by using multiple main elements in the alloy system to increase the mixing entropy of the system. Therefore, alloying elements tend to exist in the form of solid solutions, which greatly improves the mechanical properties of high-entropy alloys. FeCoCrNi alloy is a kind of high-entropy alloy, and its structure is face-centered cubic structure (FCC). In recent years, due to its high strength and plasticity, it has been studied more and more. Strength and plasticity are the two most important mechanical properties of materials, and there is a balance between them that is difficult to break, and the improvement of one o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B22F3/24C22C1/04C22C30/00C22F1/00B33Y10/00
CPCB22F3/24C22C1/04C22C30/00C22F1/00B33Y10/00B22F2003/248Y02P10/25
Inventor 徐连勇林丹阳荆洪阳韩永典赵雷吕小青
Owner TIANJIN UNIV
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