Powder material for laser high entropy alloying of iron single element base alloy surface

A technology of laser alloying and high-entropy alloying, applied in metal material coating process, coating and other directions, can solve the problems of coating forming quality and surface continuity can not meet the requirements of use, achieve a simple solid solution phase structure, reduce brittleness Effect

Active Publication Date: 2015-05-27
SHENYANG POLYTECHNIC UNIV
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  • Description
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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

Method used

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  • Powder material for laser high entropy alloying of iron single element base alloy surface
  • Powder material for laser high entropy alloying of iron single element base alloy surface
  • Powder material for laser high entropy alloying of iron single element base alloy surface

Examples

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Effect test

Embodiment 1

[0055] Fe on the surface of Q235 steel substrate 0 Preparation of CoCrAlCu Laser High Entropy Alloyed Coatings.

[0056] Prepare Fe at a molar ratio of 0:1:1:1:1 0 CoCrAlCu alloy powder, wherein the mole fraction of Fe is 0, the powder prepared by pure metal powder is pre-ground and dried, and then placed on the surface of Q235 steel substrate, and the thickness of the pre-alloyed powder is 0.5-1.5mm. Use ZQM-SD 500W Nd:YAG solid-state pulsed laser for single-pass and multi-pass laser irradiation. The specific process parameters are: voltage 380V, current 120-190A, spot diameter 1.2mm, scanning speed 3-5mm / s . DLA61300 semiconductor laser is used, the laser output power is 2kW, the laser wavelength is 980±10nm, the spot diameter is 3mm, and the scanning speed is 5-40mm / s. The overlapping rate of large-area laser beam scanning is 50%, the protective gas argon flow rate in the laser alloying process is 10-20L / min, and the thickness of the obtained laser alloyed layer is 0.4-0...

Embodiment 2

[0058] Fe on Q235 steel substrate 0.5 Preparation of CoCrAlCu Laser High Entropy Alloying Coatings.

[0059] Prepare Fe at a molar ratio of 0.5:1:1:1:1 0.5 CoCrAlCu alloy powder, the powder prepared by pure metal powder is pre-placed on the surface of Q235 steel base material after grinding and drying, and the thickness of the pre-placed alloy powder is 0.5-1.5mm. The ZQM-SD 500W Nd:YAG solid-state pulsed laser is used for single-pass and multi-pass irradiation. The specific process parameters are: voltage 380V, current 120-170A, spot diameter 1.2mm, scanning speed 3-5mm / s. DLA61300 semiconductor laser is used, the laser output power is 2kW, the laser wavelength is 980±10nm, the spot diameter is 3mm, and the scanning speed is 5-40mm / s. The overlapping rate of large-area laser beam scanning is 50%, the flow rate of protective gas argon in the laser alloying process is 10-20L / min, and the thickness of the obtained laser alloyed layer is 0.5-1.0mm.

Embodiment 3

[0061] Preparation of FeCoCrAlCu high-entropy alloy coating on Q235 steel substrate.

[0062] The FeCoCrAlCu alloy powder is prepared according to an equimolar ratio, and the powder prepared by using pure metal powder is ground and dried, and then placed on the surface of the Q235 steel substrate, and the thickness of the preset alloy powder is 0.5-1.5mm. The ZQM-SD 500W Nd:YAG solid-state pulsed laser is used for single-pass and multi-pass irradiation. The specific process parameters are: voltage 380V, current 110-150A, spot diameter 1.2mm, scanning speed 3-5mm / s. DLA61300 semiconductor laser is used, the laser output power is 2kW, the laser wavelength is 980±10nm, the spot diameter is 3mm, and the scanning speed is 5-40mm / s. The overlapping rate of large-area laser beam scanning is 50%, the protective gas argon flow rate in the laser alloying process is 10-20L / min, and the thickness of the obtained laser alloyed layer is 0.7-1.5mm.

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Abstract

The invention discloses a powder material for laser high entropy alloying of an iron single element base alloy surface, belongs to the surface engineering technology field, and provides a new power material for preparation of a high entropy alloy coating. The powder material for the laser high entropy alloying of the iron single element base alloy surface consists of five types or more than five types of metallic elements. Constituent elements of the powder material for the laser high entropy alloying of the iron single element base alloy surface contain single element base alloy base material principal element iron, wherein content of the confirmed single element base alloy base material principal element iron is 0-30% of the total molar fraction of the coating alloy power material, and adding content of other types of the constituent elements in the coating alloy power material is 5-35% 0f the total molar fraction of the coating alloy power material. The powder material for the laser high entropy alloying of the iron single element base alloy surface is prepared by using appropriate laser irradiation technological parameters, and can prepare the high entropy alloy coating in metallurgical bonding with an iron base alloy base material, uniform and fine in texture, flawless and excellent in performance.

Description

Technical field: [0001] The invention relates to a formula and a process method for preparing high-entropy alloy coating material powder by laser reaction synthesis on the surface of a steel material-iron single-element-based alloy substrate. Background technique: [0002] In the 1990s, scholars in Taiwan took the lead in breaking through the traditional alloy design mode, put forward a new alloy design concept, and successfully prepared multi-principal high-entropy alloys. High-entropy alloys have attracted widespread attention and active exploration of scholars at home and abroad since they were proposed. Entropy is a parameter that represents the degree of disorder in thermodynamics. The more elements in an alloy system, the greater the degree of disorder, the higher the entropy value. In multi-principal high-entropy alloys, the number of components is defined between 5 and 13, and each element has a relatively high atomic fraction, but its content will not exceed 35%. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00C23C24/10C22C30/02
Inventor 张春华王超张松吴臣亮伊俊振李琴单丽娜韩维娜李杰勋孙晗刘杰
Owner SHENYANG POLYTECHNIC UNIV
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