Alloy component and its preparation method

A component and alloy technology, applied in the field of alloy components and their preparation, can solve the problems of deterioration of composition segregation, easy generation of porosity, shrinkage cavities and cracks in alloy components, and achieves the effect of low cost

Active Publication Date: 2020-09-04
INST OF INTELLIGENT MFG GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Examples

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preparation example Construction

[0054] 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 reaction process, mixing and preparing Composite powders of nanotubes, carbon nanofibers, rare earth nanoparticles, and the pre-alloyed high-entropy alloy; the additive manufacturing process uses lasers to locally heat and melt the composite powders, and deposits and solidifies layer by layer to obtain alloy components.

[0055] In this embodiment, combined with the additive manufacturing process (such as 3D printing), the composite powder formed by carbon nanotubes, carbon nanofibers, 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 limited by mold manufac...

Embodiment 1

[0070] Laser-assisted additive manufacturing of high-entropy alloy marine propeller blades with a maximum length of 800mm, the process specifically includes the following steps:

[0071] Step 1: Use CAD software to make three-dimensional modeling of propeller blades, then 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 LAAM platform control software;

[0072] Step 2: Based on the calculation results of the thermodynamic software, the atomic percentage expression of the high-entropy alloy composition is designed as Fe 20 co 20 Ni 20 Nb 15 Ta 10 Cr 5 Zr 10 , convert the atomic percentages of Fe, Co, Ni, Nb, Ta, Cr, Zr elements into mass ratios and weigh the powders. The purity of the powders must reach more than 99.9%. Controlled within the range of 45μm to 105μm;

[0073] Step 3: Put the weighed Fe, Co, Ni, Nb, Ta, Cr, Zr element powders into a planetary high-e...

Embodiment 2

[0078] Laser-assisted additive manufacturing of high-entropy alloy marine diesel engine connecting rods with a maximum length of 1000mm, the process specifically includes the following steps:

[0079] Step 1: Use CAD software to model the diesel engine connecting rod in 3D, then 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 control software of the LAAM platform;

[0080] Step 2: Based on the calculation results of the thermodynamic software, the atomic percentage expression of the high-entropy alloy composition is designed as Fe 16 co 16 Ni 16 Nb 18 Ta 12 Cr 6 V 8 Zr 8 , convert the atomic percentages of Fe, Co, Ni, Nb, Ta, Cr, V, Zr elements into mass ratios and weigh the powders. The purity of the powders must reach 99.9%. The particle size is controlled within the range of 45μm to 105μm;

[0081] Step 3: Put the weighed Fe, Co, Ni, Nb, Ta, Cr, V, Zr elem...

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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 uses carbon nanotubes, carbon nanofibers, and rare earth nanoparticles as reinforcements, wherein the atomic percentage of the high-entropy alloy is The expression is (Fe 1 / 3 co 1 / 3 Ni 1 / 3 ) x (Nb 1 / 2 Ta 1 / 3 Cr 1 / 6 ) y L 100‑x‑y , wherein, L contains at least one selected from B, Mg, Al, Si, Sr, Ga, Ge, Sn, Sb, Bi, Cu, Mn, Ag, Zn, V, Ti, Zr, Mo, Hf and W species, and, 0<x≤60, 0≤y≤40. According to the present invention, it is possible to provide an alloy component that refines the crystal grains, makes the distribution of material components more uniform, improves the performance of the grain boundary, and improves the corrosion resistance of the grain boundary, and its preparation method.

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): C22C47/14C22C49/02B22F3/105B33Y10/00B33Y40/00B33Y70/10C22C101/10
CPCC22C47/14C22C49/02B33Y10/00B33Y40/00B22F10/00B22F10/36B22F10/34B22F10/322B22F10/28B22F10/20Y02P10/25
Inventor 韩冰毕贵军程韬波张理郭震曹立超
Owner INST OF INTELLIGENT MFG GUANGDONG ACAD OF SCI
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