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Method for regulating and controlling nucleation undercooling degree of cobalt-boron alloy through melt structure transition in high-intensity magnetic field

A magnetic field regulation and subcooling technology, applied in the field of alloy material preparation, can solve problems such as poor metallurgical quality, and achieve the effects of reducing equipment energy consumption, low subcooling, and simple operation

Active Publication Date: 2021-08-17
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to overcome the poor metallurgical quality problems such as segregation and inclusions in the traditional alloy melt during the solidification process, and actively control to obtain a large supercooling, uniform and stable alloy structure and properties, the magnetic field is a clean and efficient energy field with temperature induction as the main The effect of melt nucleation and subsequent growth has a non-negligible effect, and can also bring more novel treatment effects. Therefore, the present invention proposes a series of Co-B binary alloys that use magnetic field at high temperature Controlling the transformation of alloy melt structure, keeping warm at different superheating temperatures, and then cooling to obtain different degrees of nucleation undercooling

Method used

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  • Method for regulating and controlling nucleation undercooling degree of cobalt-boron alloy through melt structure transition in high-intensity magnetic field
  • Method for regulating and controlling nucleation undercooling degree of cobalt-boron alloy through melt structure transition in high-intensity magnetic field
  • Method for regulating and controlling nucleation undercooling degree of cobalt-boron alloy through melt structure transition in high-intensity magnetic field

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Embodiment 1

[0058] This embodiment is a method to regulate Co 81.5 B 18.5 The method of eutectic alloy melt structure and nucleation supercooling behavior, the specific process is:

[0059] The first step is raw material processing and batching. After the cobalt flakes and boron particles with a purity of more than 99.9% are polished off the surface oxide layer with a grinding wheel, they are soaked in 99.8% absolute ethanol, and surface impurities such as oil stains and abrasive debris are removed by ultrasonic vibration. According to the atomic percentage Co:B=81.5:18.5, the corresponding mass raw materials were weighed with an analytical balance, and used in the subsequent smelting process.

[0060] In the second step, the preparation of Co 81.5 B 18.5 Eutectic alloy ingot. The cobalt-boron raw materials obtained in the first step are put into a non-consumable vacuum arc melting furnace together, and the cobalt sheet is covered on the boron particles. First of all, vacuumize to k...

Embodiment 2

[0066] This embodiment is a method to regulate Co 81.5 B 18.5 The method of eutectic alloy melt structure and nucleation supercooling behavior, the specific process is:

[0067] The first step is raw material processing and batching. After the cobalt flakes and boron particles with a purity of more than 99.9% are polished off the surface oxide layer with a grinding wheel, they are soaked in 99.8% absolute ethanol, and surface impurities such as oil stains and abrasive debris are removed by ultrasonic vibration. According to the atomic percentage Co:B=81.5:18.5, the corresponding mass raw materials were weighed with an analytical balance, and used in the subsequent smelting process.

[0068] In the second step, the preparation of Co 81.5 B 18.5 Eutectic alloy ingot. The cobalt-boron raw materials obtained in the first step are put into a non-consumable vacuum arc melting furnace together, and the cobalt sheet is covered on the boron particles. First of all, vacuumize to k...

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Abstract

The invention discloses a method for regulating and controlling the nucleation undercooling degree of a cobalt-boron alloy through melt structure transition in a high-intensity magnetic field. The method comprises the following steps: placing the cobalt-boron alloy in a high temperature-resistant reaction device, and then covering a sample with B2O3; placing the high temperature-resistant reaction device in a reaction furnace, and putting a superconducting magnet capable of exciting a magnetic field in the reaction furnace; regulating and controlling the melt structure transition of the cobalt-boron alloy under the action of the magnetic field at high temperature, performing heat preservation at different overheating temperature, and then performing cooling to obtain different nucleation undercooling degrees, thereby obtaining cobalt-boron alloys with different undercooling degrees and surface roughness. According to the method, a magnetic field treatment mode is introduced into melt overheating, an undercooling nucleation behavior of an alloy is controlled by a coupling effect of the magnetic field and a temperature field, and compared with a single temperature field, the magnetic field and the temperature field can perform active control under lower energy consumption; more optimized and more diversified regulation and control structures can be obtained, alloys with different undercooling degrees states and surface roughness can be obtained, and the mechanical property of the alloy is regulated and improved.

Description

technical field [0001] The invention belongs to the technical field of alloy material preparation, and in particular relates to a method for regulating the nucleation supercooling degree of a cobalt-boron alloy through melt structure transformation under a strong magnetic field. Background technique [0002] Liquid-liquid structure transition, that is, the transition between different cluster structures in the liquid phase, the pleomorphic transition in the liquid state widely exists in atomic liquids and molecular liquids, and is currently mainly induced by external pressure, temperature and electrical pulses. At present, in the field of metals, it is more common to control the nucleation of the alloy and the microstructure and properties after solidification by temperature-induced structural transformation of the alloy melt, that is, when the superheating temperature rises above the melting point T m Soon (T 1 temperature), the macroscopically appears as a pure liquid pha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F3/02
CPCC22F3/02
Inventor 贺一轩李金山王军卜凡刘栩东张建宝
Owner NORTHWESTERN POLYTECHNICAL UNIV
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