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Powder for high-entropy alloy-based composite material modified layer prepared on ferrous alloy surface

A high-entropy alloy and composite material technology is applied in the field of preparing powder for a modified layer of a high-entropy alloy-based composite material on the surface of an iron-based alloy, and can solve the problem that the thermophysical properties of the modified layer material and the base material do not match, and the modified layer Cracking, poor bonding of matrix materials, etc., to achieve excellent physical and chemical properties and improve performance

Active Publication Date: 2015-05-27
SHENYANG POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention uses laser irradiation to synthesize the modified layer of the high-entropy alloy-based composite material by using the main constituent element iron of the iron single-element-based alloy base material to react with the coating material, and is used to solve the problem of thermal physics of the modified layer material and the base material. Performance mismatch, cracking of the modified layer and poor combination with the matrix material, and the preparation of a modified layer of high-entropy alloy-based composite materials with excellent performance on the basis of high-entropy alloy coating materials. Surface alloying technology to prepare the powder and process method used in the modified layer of high-entropy alloy matrix composites

Method used

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  • Powder for high-entropy alloy-based composite material modified layer prepared on ferrous alloy surface
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  • Powder for high-entropy alloy-based composite material modified layer prepared on ferrous alloy surface

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Preparation of FeCoCrAlCu high-entropy alloy modified layer on the surface of Q235 steel substrate.

[0046] FeCoCrAlCu alloy powder is prepared in equimolar ratio, the powder prepared by pure metal powder is mixed, ground and dried, and then placed on the surface of Q235 steel base material, 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 was used for irradiation, the laser output power was 2kW, the laser wavelength was 980±10nm, the spot diameter was 3mm, and the scanning speed was 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.

Embodiment 2

[0048] Preparation of FeCoCrAlCu+10Wt%TiC high-entropy alloy-based composite modified layer on the surface of Q235 steel substrate.

[0049] Prepare FeCoCrAlCu high-entropy alloy powder in an equimolar ratio, and add 10Wt% TiC powder of the powder. The prepared powder is mixed, ground and dried, and then placed on the surface of the Q235 steel substrate, and the thickness of the alloy powder is 0.5-1.5 mm. Use ZQM-SD 500W Nd:YAG solid-state pulsed laser for single-pass and multi-pass laser irradiation treatment. The specific process parameters are: voltage 380V, current 120-180A, spot diameter 1.2mm, scanning speed 3-5mm / s. DLA61300 semiconductor laser was used for irradiation, the laser power was 2kW, the laser wavelength was 980±10nm, the spot diameter was 3mm, and the scanning speed was 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, the thickness of the obtained l...

Embodiment 3

[0051] Preparation of FeCoCrAlCu+30Wt%TiC high-entropy alloy-based composite modified layer on the surface of Q235 steel substrate.

[0052] FeCoCrAlCu high-entropy alloy powder was prepared in an equimolar ratio, and 30Wt% TiC powder was added to the powder. The prepared powder is mixed, ground and dried, and then placed on the surface of the Q235 steel substrate, and the thickness of the alloy powder is 0.5-1.5 mm. Use ZQM-SD 500W Nd:YAG solid-state pulsed laser for single-pass and multi-pass laser irradiation treatment. The specific process parameters are: voltage 380V, current 120-180A, spot diameter 1.2mm, scanning speed 3-5mm / s. DLA61300 semiconductor laser was used for irradiation, the laser power was 2kW, the laser wavelength was 980±10nm, the spot diameter was 3mm, and the scanning speed was 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...

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Abstract

The invention discloses a powder for a high-entropy alloy-based composite material modified layer synthesized on the surface of an iron single element alloy by a laser reaction and a preparation technology and belongs to the field of a surface engineering technology. The invention provides more excellent properties for the high-entropy alloy modified layer. The powder for the high-entropy alloy-based composite material is composed of 50-99 wt% of a high-entropy alloy powder and 1-50 wt% of a reinforced phase powder. By a laser irradiation alloying method, a high-entropy alloy-based composite material modified layer which has a uniformly distributed microstructure, is crack-free and has better performance than an original high-entropy alloy coating can be prepared.

Description

Technical field: [0001] The invention provides a method for preparing powder used for preparing a modified layer of a high-entropy alloy-based composite material by laser alloying on the surface of an iron single-element-based alloy and a method for preparing the modified layer of a high-entropy alloy-based composite material. Background technique: [0002] In the 1990s, scholars in Taiwan 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, also known as high-chaos alloys, multi-principal high-function alloys, etc. . In recent years, researchers at home and abroad have done some research on high-entropy alloys, and research on the microstructure and properties of traditional composite materials and the formation of composite reinforcements has made great progress. However, research on high-entropy alloy-based composites There are very few literature reports o...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C32/00C22C30/02C22C29/00B22F1/00
Inventor 张松王超张春华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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