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A kind of preparation method of high entropy alloy double process

A technology of high-entropy alloy and dual-process technology, which is applied in the field of high-entropy alloy, can solve the problems of uneven alloy composition and structure, few optional types of alloy elements, and limited types of high-entropy alloy, so as to achieve uniform composition and structure, eliminate Defects, the effect of eliminating macroscopic and microstructural defects

Active Publication Date: 2021-09-17
SHIJIAZHUANG TIEDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the high preparation cost and low efficiency of the existing technology, there are few optional types of alloy elements, it is difficult to adjust the alloy composition, and it is difficult to prepare high-entropy alloys containing alloy elements with large differences in physical and chemical properties such as melting point, boiling point and density. The types of entropy alloys are limited, the alloy composition and structure are uneven, the purity is low, the internal quality is poor, and defects such as pores, cracks, slag inclusions, solidification segregation, and shrinkage cavities are prone to occur. The present invention provides a high-entropy alloy duplex process Preparation

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  • A kind of preparation method of high entropy alloy double process
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  • A kind of preparation method of high entropy alloy double process

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preparation example Construction

[0023] The embodiment of the present invention provides a high-entropy alloy dual-process preparation method. The method comprises the following steps:

[0024] (1) According to the composition, content and physical and chemical properties of the high-entropy alloy to be prepared, the types of four welding wires and the composition, content, existence form and location of the welding wire elements are decomposed and designed. The high-entropy alloy includes major alloying elements and minor alloying elements And trace alloying elements, the high-melting point alloying elements with a melting point of 3200°C to 3800°C in the high-entropy alloying elements exist in the form of alloys, and the existence of low-melting point alloying elements in the high-entropy alloying elements with a melting point of 150°C to 800°C is solid At least one of the alloy outer bands of the welding wire or the flux-cored welding wire, so that the physical and chemical properties of the components of ...

Embodiment 1

[0043] A high entropy alloy Al 17 co 13 Cr 20 Fe 13 Ni 22 V 5.5 C 1.4 Mg 1.5 mn 1.5 Mo 1.4 Ti 1 W 2.3 Nb 0.4 , the preparation method comprises the following steps:

[0044] (1) Decompose and design the types of four welding wires and the composition and content of welding wire elements according to the composition, content and physical and chemical properties of the high-entropy alloy elements to be prepared, as shown in Table 1. Among them, the high-melting point alloy elements exist in the form of alloys, and the low The location where the melting point alloy elements exist is the solid welding wire, and the diameters of the solid welding wire 1, the solid welding wire 2, the solid welding wire 3 and the solid welding wire 4 are all 0.8mm, and then the welding wires are prepared.

[0045] Table 1 Type of welding wire, element composition and content (wt%)

[0046] serial number Al Ni Cr Fe co Mo W Ti Nb mn Mg V C Solid wire 1...

Embodiment 2

[0052] A high-entropy alloy Co 8.5 Cr 17 Cu 21 Fe 12 Mo 6.6 Ni 26 B 1.4 sn 1.2 Ti 1.6 V 0.9 W 0.6 Y 1.1 Zn 1 al 0.3 mn 0.4 Ta 0.4 , the preparation method comprises the following steps:

[0053] (1) Decompose and design the types of four welding wires and the composition and content of welding wire elements according to the composition, content and physical and chemical properties of the high-entropy alloy elements to be prepared, as shown in Table 3. Among them, the high melting point alloy elements exist in the form of alloys, and the low The location where the melting point alloy elements exist is the solid welding wire, and the diameters of the solid welding wire 1, the solid welding wire 2, the flux-cored welding wire 3 and the solid welding wire 4 are all 1.0 mm, and then the welding wires are prepared.

[0054] Table 3 Types of welding wire, element composition and content (wt%)

[0055] serial number Al Ni Cr Fe co Mo W Ti B mn...

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Abstract

The invention relates to the technical field of high-entropy alloys, and specifically discloses a high-entropy alloy dual-process preparation method. The preparation method of the high-entropy alloy dual process, firstly, according to the element composition, content and physical and chemical properties of the high-entropy alloy to be prepared, decomposes and designs the types of four welding wires and the composition, content, existence form and location of welding wire elements, and prepares Welding wire; secondly, the integrated four-wire pulsed gas shielded welding process is used to synergistically add materials to manufacture high-entropy alloys; finally, the high-entropy alloy is refined by vacuum self-consumption remelting process. The high-entropy alloy dual-process preparation method provided by the present invention has stable process, high preparation efficiency, low cost, large heat input adjustment range, wide range of optional alloy elements, many types of high-entropy alloys prepared, and convenient adjustment of alloy components. Accurate and controllable, uniform chemical composition, dense and uniform tissue, high purity, and excellent internal quality.

Description

technical field [0001] The invention relates to the technical field of high-entropy alloys, in particular to a method for preparing high-entropy alloys through a double-process. Background technique [0002] High-entropy alloys have undergone extensive and in-depth research by domestic and foreign scholars, and the preparation methods of high-entropy alloys have made significant progress. However, due to the complex element composition of high-entropy alloys, there are often major differences in melting point, boiling point and density. Preparation poses enormous challenges. For the preparation of bulk high-entropy alloys, the most commonly used methods are vacuum arc melting, vacuum electromagnetic induction melting, laser additive manufacturing and other melting methods. [0003] Vacuum arc melting uses arc heat as the heat source, and can melt alloys with higher melting points, but this method has some disadvantages. First, it is difficult to prepare high-entropy alloys ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C30/00C22C30/02C22C30/04C22C30/06C22B9/20
CPCC22B9/20C22C1/02C22C30/00C22C30/02C22C30/04C22C30/06
Inventor 胡连海靳旭乐许昌玲冷宇轩吕小松陶国栋孙继友
Owner SHIJIAZHUANG TIEDAO UNIV