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High-entropy alloy double technology preparation method

A high-entropy alloy and duplex process technology, applied in the field of high-entropy alloy, can solve the problems of uneven composition and structure of alloy, difficulty of high-entropy alloy, low purity, etc., achieve dense and uniform structure, solve ratio problems, adjust The effect of many parameters

Active Publication Date: 2020-06-30
SHIJIAZHUANG TIEDAO UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

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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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 elements to be prepared, decompose and design the types of the four welding wires and the composition, content, existence form and location of the welding wire elements, and then prepare the welding wires;

[0025] (2) Arrange 4 welding wires including 1 leading welding wire, 2 following welding wires and 1 trailing welding wire in an integrated manner, the axis extension lines of the 4 welding wires and the 4 contact points of the workpiece form a harmonious quadrilateral, and the axis of the leading welding wire extends The contact points between the wire and the workpiece are respectively equal to the distance between the two axis extension lines following the welding wire and the contact points of the workpiece,...

Embodiment 1

[0045] A high entropy alloy Al 17 co13 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:

[0046] (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.

[0047] Table 1 Type of welding wire, element composition and content (wt%)

[0048] Numbering Al Ni Cr Fe co Mo W Ti Nb mn Mg V C Solid wire 1 92 ...

Embodiment 2

[0054] 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:

[0055] (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.

[0056] Table 3 Types of welding wire, element composition and content (wt%)

[0057]

[0058] (2) Welding parameters are set, welding shielding gas i...

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Abstract

The invention relates to the technical field of high-entropy alloy, in particular to a high-entropy alloy double technology preparation method. The high-entropy alloy double technology preparation method comprises the steps that firstly, types of four welding wires and components, contents, existence forms and existence positions of welding wire elements are decomposed and designed according to the element components, contents and physico-chemical properties of high-entropy alloy needing to be prepared, and the welding wires are prepared; secondly, an integrated four-wire pulse gas shielded welding technology is adopted to cooperate with additional materials to manufacture the high-entropy alloy; and finally, a vacuum self-consumption remelting technology is adopted to refine the high-entropy alloy. According to the high-entropy alloy double technology preparation method provided by the invention, the technology is stable, the preparation efficiency is high, the cost is low, the heat input adjusting range is wide, the optional alloy element range is wide, the quantity of types of prepared high-entropy alloy is large, alloy component adjusting is convenient and accurately controllable, chemical components are uniform, the structure is compact and uniform, the degree of purity is high, and the inner quality is good.

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 Applications(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
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