Powder material for FeCoCrAlCuVx laser alloying and preparation process thereof

A technology of laser alloying and alloy powder, applied in metal material coating process, coating and other directions, can solve the problem of thin coating, difficult to meet the mechanical performance requirements of workpiece, coating forming quality and surface continuity can not meet the requirements of use, etc. problems, to achieve the effect of reducing production costs and reducing brittleness

Inactive Publication Date: 2015-04-29
SHENYANG POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large differences in thermal physical properties such as density, melting point, specific heat and expansion coefficient between different types of metal elements in high-entropy alloy powders and between them and the base material, they are directly used for laser cladding, thermal spraying, etc. Surface technology is difficult to obtain a coating with uniform composition, resulting in the coating's forming quality and surface continuity failing to meet production requirements
High-entropy alloy coatings can also be prepared by magnetron sputtering and electrochemical methods, but the coatings prepared by these methods are too thin to meet the mechanical performance requirements of the workpiece under service conditions

Method used

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  • Powder material for FeCoCrAlCuVx laser alloying and preparation process thereof
  • Powder material for FeCoCrAlCuVx laser alloying and preparation process thereof
  • Powder material for FeCoCrAlCuVx laser alloying and preparation process thereof

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preparation example Construction

[0037] (2) Preparation of alloy powder, the above-mentioned Fe, Co, Cr, Al, Cu and V metal powder according to 1:1:1:1:1:x, the value range of x is 0~1 (can take x =0, 0.2, 0.5, 0.8, 1) Proportional weighing and mixing. Then, put the uniformly mixed powder in a vacuum drying oven at 80° C. for 2 to 8 hours. The prepared alloy powder needs to be ball milled in a planetary ball mill or ground and mixed in a mortar for 2 to 5 hours.

[0038] (3) Prepare the laser high-entropy alloying coating, pre-place the FeCoCrAlCuVx series alloy powder on the surface of the Ni201 substrate, and the thickness of the pre-placed powder is 0.5-1.5mm. Using CO 2 The laser processing system performs laser high-entropy alloying operation, the laser output power is 2kW, the spot diameter is 3mm, the scanning speed is 3-7mm / s, the overlapping rate of large-area laser beam scanning is 50%, and the protective gas Ar flow rate in the laser alloying process is 10~20L / min, nickel, the main element of th...

Embodiment 1

[0042] FeCoCrAlCuV 0 / Ni201 Laser High Entropy Alloying Coating Preparation.

[0043] Preparation of FeCoCrAlCuV in molar ratio 1:1:1:1:1:0 0 Alloy powder, the powder prepared by pure metal powder is pre-placed on the surface of Ni201 substrate after grinding and drying, and the thickness of pre-alloy powder is 0.5-1.5mm. Using CO 2 The laser processing system performs laser irradiation reaction alloying treatment, the laser output power is 2kW, the spot diameter is 3mm, the scanning speed is 3-7mm / s, the overlapping rate of large-area laser beam scanning is 50%, and the protective gas Ar flow rate in the laser alloying process is 10-20L / min, nickel, the main element of the nickel single-element-based alloy substrate, participates in the surface alloying process during the laser irradiation process, and the determined mole fraction of the main element nickel in the single-element-based alloy accounts for the total molar number of the alloyed layer 5% to 35% of the 6-princip...

Embodiment 2

[0045] FeCoCrAlCuV 0.2 / Ni201 Laser High Entropy Alloying Coating Preparation.

[0046] Prepare FeCoCrAlCuV according to molar ratio 1:1:1:1:1:0.2 0.2 Alloy powder, the powder prepared by pure metal powder is pre-placed on the surface of Ni201 substrate after grinding and drying, and the thickness of pre-alloy powder is 0.5-1.5mm. Using CO 2 The laser processing system performs laser irradiation reaction alloying treatment, the laser output power is 2kW, the spot diameter is 3mm, the scanning speed is 3-7mm / s, the overlapping rate of large-area laser beam scanning is 50%, and the protective gas Ar flow rate in the laser alloying process is 10-20L / min, nickel, the main element of the nickel single-element-based alloy substrate, participates in the surface alloying process during the laser irradiation process, and the determined mole fraction of the main element nickel in the single-element-based alloy accounts for the total molar number of the alloyed layer 5% to 35% of that...

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Abstract

The invention relates to a powder material for synthesizing a FeCoCrAlCuVx high entropy alloyed coating of a singleton-nickel-based alloy substrate based on surface laser reaction and a preparation process thereof, belonging to the technical field of surface engineering. The powder material comprises five or more than five metal elements, a high entropy alloy coating is prepared by using the reaction synthesis technology of dissolving the main component nickel of the singleton based alloy substrate into a coating material, the problems of unmatching in the thermophysical properties between the coating material and the substrate material, cracking of the coating in the process of laser irradiation rapid melting and poor bonding of the substrate material caused by larger difference between different categories of metal elements of high entropy alloy coating powder prepared at present and the substrate material thereof in the thermophysical properties such as density, melting point, specific heat and expansion coefficient are solved. The high entropy alloyed layer with good high-temperature antioxidant properties is prepared according to the process disclosed by the invention, the surface properties of the material are remarkably improved, and the laser surface engineering is further popularized and applied to the technical field of laser surface engineering.

Description

Technical field: [0001] The invention is applicable to the field of material surface engineering, and in particular relates to a powder used for preparing a FeCoCrAlCuNiVx high-entropy alloy coating by laser reaction synthesis on the surface of a nickel single-element base alloy and a preparation process. Background technique: [0002] The traditional alloy design concept believes that the more principal elements in the alloy system, the easier it is to form complex phases such as intermetallic compounds, which not only deteriorates the performance of the alloy but also makes the analysis of the alloy difficult. In the 1990s, Taiwanese scholar Ye Junwei took the lead in breaking through the traditional alloy design mode, proposed a new alloy design concept, and successfully prepared multi-principal high-entropy alloys. In the multi-principal high-entropy alloy system, the number of principal elements is defined between 5 and 13, and the atomic fraction of each element accoun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B22F1/00B22F9/04
Inventor 张松吴臣亮张春华李琴张文吉李丹丁燕燕贾永峰张昊天
Owner SHENYANG POLYTECHNIC UNIV
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