Alloy component and its preparation method

A component and alloy technology, which is applied in the field of alloy components and their preparation, can solve the problems that the mechanical properties of high-entropy alloy materials are difficult to show, the alloy elements are difficult to mix uniformly, and alloy components are prone to looseness, etc., so as to improve high-temperature creep characteristics, The effect of uniform composition and low cost

Active Publication Date: 2020-11-24
INST OF INTELLIGENT MFG GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the prior art, there are still many problems in the preparation of alloy components simply by using high-entropy alloys as raw materials, such as: the difficulty of uniform mixing of various alloy elements, the problem of composition segregation deteriorates the strength, toughness and corrosion resistance of alloy components, and the grain structure The coarseness of the alloy components is prone to porosity, shrinkage cavities and crack defects, etc. These problems make it difficult to show the advantages of high-entropy alloy materials in terms of mechanical properties

Method used

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  • Alloy component and its preparation method
  • Alloy component and its preparation method
  • Alloy component and its preparation method

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preparation example Construction

[0052] Such as figure 1 As shown, the preparation method of the alloy component involved in this embodiment may include the following steps: a pre-alloying process, performing a pre-alloying treatment on the high-entropy alloy raw material to obtain a pre-alloyed high-entropy alloy; a mixing process, mixing carbon nanotubes, rare earth Nanoparticles and the pre-alloyed high-entropy alloy are mixed to form a suspension, which is dehydrated and deoxidized to form a composite powder; in the additive manufacturing process, the composite powder is locally heated and melted by a laser, and deposited and solidified layer by layer to obtain the alloy member.

[0053] In this embodiment, combined with the additive manufacturing process, the composite powder formed by carbon nanotubes, rare earth nanoparticles and high-entropy alloys is heated and melted by laser and deposited layer by layer to form alloy components, because the additive manufacturing process is not affected by mold man...

Embodiment 1

[0066] Laser melting deposition manufacturing of marine reducer gears with a maximum diameter of 1000mm, the process specifically includes the following steps:

[0067] Step 1: Use CAD software to carry out three-dimensional modeling of marine reducer gears. On this basis, use CAM software to plan the laser scanning path of each layer, and finally form the processing path program of the entire part, and input the program into the LMD platform control software;

[0068] Step 2: Based on the calculation results of the thermodynamic software, the atomic percentage expression of the high-entropy alloy composition is designed as Al 15 Si 5 Fe 40 Nb 10 Ta 10 Cr 10 f 5 Er 5 , convert the atomic percentage of Al, Si, Fe, Nb, Ta, Cr, Hf, Er into mass ratio and weigh the powder. The purity of the powder must reach 99.9%. Before weighing the raw material powder, sieve the powder The particle size is controlled within the range of 45μm to 105μm;

[0069] Step 3: Put the weighed A...

Embodiment 2

[0074] The laser melting deposition manufacturing of the aircraft landing gear shaft with a length of 800mm, the process specifically includes the following steps:

[0075] Step 1: Use CAD software to carry out three-dimensional modeling of the landing gear shaft. On this basis, use CAM software to plan the laser scanning path of each layer, and finally form the processing path program of the entire part, and input the program into the LMD platform control software ;

[0076] Step 2: Based on the calculation results of the thermodynamic software, the atomic percentage expression of the high-entropy alloy composition is designed as Al 30 Si 10 Fe 20 Nb 5 Ta 5 Ti 10 Zr 10 Mo 5 Y 5 , convert the atomic percentages of Al, Si, Fe, Nb, Ta, Ti, Zr, Mo, and Y elements into mass ratios and weigh the powders. The purity of the powders must reach 99.9%. Before weighing the raw material powders, pass through a sieve Control the particle size of the powder within the range of 45μm...

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Abstract

The invention provides an alloy component and a preparation method thereof. The alloy component uses a high-entropy alloy as a matrix and carbon nanotubes and rare earth nanoparticles as reinforcements, wherein the atomic percentage expression of the high-entropy alloy is L x m y N z (Fe 2 / 3 Nb 1 / 6 Ta 1 / 6 ) 100‑x‑y‑z , wherein L contains at least one selected from B, Mg, Al, Si, Sr, Ga, Ge, Sn, Sb and Bi, and M contains at least one selected from Cu, Co, Cr, Ni, Mn, Ag, Zn, At least one of V, Ti, Zr, Mo, Hf and W, N contains at least one selected from Er, Y, Sc, Nd, Dy, Tm and Gd, and, 0≤x<100, 0≤ y<45, 0≤z<10, 0≤x+y+z<100. According to the present invention, it is possible to provide an alloy component that refines grains, makes the distribution of material components more uniform, improves grain boundary properties, and improves grain boundary corrosion resistance, and a preparation method thereof.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to an alloy component and a preparation method thereof. Background technique [0002] Compared with the traditional alloy system with one or two metal elements as the matrix, high-entropy alloys containing multiple metal or non-metal elements belong to a new alloy system. Because of its high entropy effect in thermodynamics, hysteresis diffusion effect in kinetics, lattice distortion effect in microstructure and "cocktail" effect in material properties, high entropy alloys exhibit the characteristics that traditional alloys are difficult to achieve. Compared with high toughness and excellent wear resistance, corrosion resistance, high temperature resistance, high temperature oxidation resistance and other excellent properties, it has the potential to become the material of choice for the preparation of core components related to aerospace, nuclear energy and ocean engineering. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C1/10C22C30/00B22F3/105B33Y10/00B33Y70/10C22C38/06C22C38/34C22C38/26C22C21/00
CPCC22C1/05C22C30/00B33Y10/00B33Y70/00C22C38/06C22C38/34C22C38/26C22C38/002C22C38/005C22C21/003B22F10/00B22F10/362B22F10/32B22F10/25B22F10/34B22F10/36B22F10/38B22F10/322B22F10/37Y02P10/25
Inventor 韩冰毕贵军张理郭震
Owner INST OF INTELLIGENT MFG GUANGDONG ACAD OF SCI
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