High-entropy alloy, preparation method and laser cladding method

A high-entropy alloy and laser cladding technology, which is applied in the field of laser cladding, high-entropy alloy preparation, to achieve the effect of reducing material density, good weldability, hardness and wear resistance

Active Publication Date: 2022-01-11
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the types and specific components of high-entropy alloys suitable for laser cladding have not yet formed a system, especially for laser cladding raw materials and related processes that are suitable for high-load molds and high-hard wear-resistant coatings on the surface of key marine components. explore

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  • High-entropy alloy, preparation method and laser cladding method
  • High-entropy alloy, preparation method and laser cladding method
  • High-entropy alloy, preparation method and laser cladding method

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preparation example Construction

[0036] In a second aspect, an embodiment of the present invention also provides a method for preparing the above-mentioned high-entropy alloy, which includes: using a plasma rotating electrode atomization powder-making technology to prepare high-entropy alloy powder.

[0037] In an optional embodiment, the preparation of the high-entropy alloy powder includes the following steps: making a consumable electrode rod from metal, melting the rod surface of the consumable electrode rod with a plasma gun, and rotating it under the action of high-speed centrifugal force The tiny droplets are thrown out, cooled into spherical powder and collected to obtain high-entropy alloy powder.

[0038] In an optional embodiment, the preparation of high-entropy alloy powder comprises the following steps:

[0039] High-entropy alloy powders were prepared using plasma rotating electrode atomization powder-making equipment, using Fe, Co, Cr, Ni, Al and Ti as raw materials.

[0040] Step 1: Weigh Fe: 1...

Embodiment 1

[0072] A kind of high hardness and wear-resistant FeCoCrNiAl 0.5 Ti 0.5 High-entropy alloy and its preparation method, the powder chemical composition and atomic percentage of high-entropy alloy material are: Fe: 20.00%, Co: 21.00%, Ni: 20.99%, Cr: 19.01%, Al: 10.01%, Ti: 8.99 %.

[0073] Its preparation method comprises the following steps:

[0074] Step 1: Weigh each ingot of Fe: 20.00%, Co: 21.00%, Ni: 20.99%, Cr: 19.01%, Al: 10.01%, Ti: 8.99% according to atomic percentage, melt and cool the target ingot and forged, and then processed into a consumable electrode rod with a diameter of 30 mm and a length of 150 mm for subsequent powder preparation.

[0075] Step 2: After vacuumizing the working chamber, fill it with high-purity argon (99.999 vol.%), so that the pressure in the working chamber is maintained at 0.06 MPa.

[0076] Step 3: Start the high-speed rotation mechanism to make the electrode rod rotate rapidly at a speed of 16000r / min in the gas environment of high...

Embodiment 2

[0091] The powder chemical composition of the high-entropy alloy material and its atomic percentage of the metal element are: Fe: 21.02%, Co: 22.50%, Ni: 19.99%, Cr: 18.05%, Al: 10.01%, Ti: 8.43%, powder and The cladding process parameters are basically consistent with the key parameters provided in Example 1.

[0092] The alloy material is prepared by laser cladding technology, and the mechanical properties of the obtained powder and cladding layer samples are tested:

[0093] According to the GB / T 19077-2016 standard, the particle size distribution measured by MS3000 laser particle size analyzer is Dv(10)=46.1μm, Dv(50)=71.7μm, Dv(90)=111μm, which meet the requirements of commonly used powder particles for laser cladding. The range of diameter is 90-108μm.

[0094] According to the GB / T 1482-2010 standard, the powder fluidity measured by JHY-1002 Hall flow meter is 21.32s / 50g, and the bulk density is 3.89g / cm 3 Meet the requirements of laser cladding process.

[0095] Acc...

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Abstract

The invention discloses a high-entropy alloy, a preparation method and a laser cladding method, and relates to the technical field of high-performance metal powder materials. The high-entropy alloy material is prepared from the following chemical components in percentage by atom: 15%-25% of Fe, 15%-25% of Co, 15%-25% of Ni, 15%-25% of Cr, 5%-15% of Al and 5%-15% of Ti. The high-hardness wear-resistant high-entropy alloy material is a high-hardness wear-resistant high-entropy alloy material suitable for surface laser cladding of precise molds, maritime work parts, oil drilling well rods and the like; a corresponding high-strength, high-hardness and wear-resistant high-entropy alloy coating is prepared from the powder prepared from alloy components by adopting a laser cladding technology, and the hardness and wear resistance of the high-entropy alloy coating have excellent effects; and in addition, the material has good weldability and is a special nickel-based high-entropy alloy material suitable for laser additive manufacturing.

Description

technical field [0001] The invention relates to the technical field of high-performance metal powder materials, in particular to a high-entropy alloy, a preparation method and a laser cladding method. Background technique [0002] The concept of high-entropy alloys is a new alloy design concept proposed in recent years. Different from traditional alloys with a single principal element or two principal elements in the past, it is usually composed of 5 or more elements, and the content of each element is between 5% and 35%, and the most common is an equimolar ratio mixture high-entropy alloys. This type of alloy design substantially increases the entropy in the alloy system, hence the name high-entropy alloys. High-entropy alloys have a series of excellent properties, such as high hardness, wear resistance and corrosion resistance. [0003] Key components such as large molds and marine components are indispensable tools and components in modern large-scale industrial produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00B22F9/10C23C24/10B22F10/20B33Y10/00B33Y70/00
CPCC22C30/00B22F9/10C23C24/106B22F10/20B33Y10/00B33Y70/00Y02P10/25
Inventor 闫星辰常成曹佳俊卢冰文刘敏
Owner GUANGDONG INST OF NEW MATERIALS
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