Method for preparing nanocystalline ingot casting by magnetic field and ultrasonic combined treatment of metal melt and dedicated apparatus therefor

A metal melt and combined processing technology is applied in the field of magnetic field and ultrasonic combined processing of metal melt to prepare nanocrystalline ingots. Simple production equipment and low investment

Inactive Publication Date: 2005-11-30
LIAONING UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to overcome the problems of complex process equipment, high cost, and difficulty in obtaining large-size nanomaterials in the above-mentioned prior art, and to provide a production process and equipment that are simple, low in cost, and capable of directly preparing high-quality, Method and special equipment for preparing nanocrystalline ingot by combined treatment of metal melt with magnetic field and ultrasonic wave in large size massive nanocrystalline ingot

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  • Method for preparing nanocystalline ingot casting by magnetic field and ultrasonic combined treatment of metal melt and dedicated apparatus therefor

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Effect test

Embodiment 1

[0030] The specific steps of the present invention for the combined treatment of the metal melt with the magnetic field and the ultrasonic wave to prepare the nanocrystalline ingot are:

[0031] 1. According to the composition requirements of metal nanocrystalline ingots, the ingredients are prepared. Taking the low-melting point alloy Al-1.0% Cu as an example, put the prepared raw materials into the melting crucible, melt them, and overheat them by 10°C;

[0032] 2. Carry out degassing treatment on the metal melt, add a degassing refining agent to the metal melt, the amount of the degassing refining agent added is 0.8% of the weight of the metal melt, and the degassing time is 1 minute;

[0033] 3. Quickly pour the degassed metal melt into the preheated crucible, and the preheating temperature of the crucible is 300°C;

[0034] 4. Heat the poured metal melt to 100°C above the liquidus line with a heater;

[0035] 5. Constant temperature at this temperature, and apply electro...

Embodiment 2

[0039] 1. According to the composition requirements of the metal nanocrystalline ingot, the ingredients are prepared, taking the low-melting point alloy Pb-Sn as an example, put the prepared raw materials into the melting crucible, melt it, and overheat it at 50°C;

[0040] 2. Perform degassing treatment on the metal melt, blow nitrogen into the metal melt, and the degassing time is 8 minutes;

[0041] 3. Quickly pour the degassed metal melt into the preheated graphite crucible, and the preheating temperature of the crucible is 350°C;

[0042] 4. Heat the poured metal melt to 70°C above the liquidus line with a heater;

[0043] 5. Constant temperature at this temperature, and apply electromagnetic stirring to the metal melt, the excitation voltage is 200V, and the conduction current density is 10 8 A / m 2 , the magnetic flux density is 10T;

[0044] 6. At the same time, apply ultrasonic vibration to the metal melt, the ultrasonic power is 500W, the ultrasonic frequency is 10...

Embodiment 3

[0047] 1. According to the composition requirements of metal nanocrystalline ingots, the ingredients are prepared. Taking low-carbon steel Fe-0.1% C as an example, put the prepared raw materials into the melting crucible, melt them, and overheat them at 80°C;

[0048] 2. Degassing the metal melt, blowing argon into the metal melt, and the degassing time is 10 minutes;

[0049] 3. Quickly pour the degassed metal melt into the preheated graphite crucible, and the preheating temperature of the crucible is 400°C;

[0050] 4. Heat the poured metal melt to 10°C above the liquidus line with a heater;

[0051] 5. Constant temperature at this temperature, and apply electromagnetic stirring to the metal melt, the excitation voltage is 180V, and the conduction current density is 10 7 A / m 2 , the magnetic flux density is 8T;

[0052] 6. At the same time, apply ultrasonic vibration to the metal melt, the ultrasonic power is 100W, the ultrasonic frequency is 60kHz, and the time for apply...

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Abstract

It is a method for preparation and the special device of nanocrystalline ingotting from metallic fondant treated jointly by magnetic field and supersonic wave, solving the present technique problem of complex device, high cost, and difficulty to prepare large-scale nanometer material and so on. The invented method is as the following steps: melting and heating the matched raw material, deairing the metallic fuse-elements, pouring rapidly the deaired metallic fuse-elements into preheated crucible, heating upwards the liquidus curve, applying electromagnetic mixing and ultrasonic vibration, chilling until it freezes totally, then the block-shaped nanocrystalline ingotting being prepared; the special device that applied joint treatment of electromagnetic mixing and ultrasonic vibration having a holding furnace, which is equipped with a crucible, the special being characterized in that outboard of the holding furnace is equipped with magnetic field generator, over the crucible there is a ultrasonic transducer, and bottom of the crucible is equipped with a chiller.

Description

technical field [0001] The invention belongs to the production field of bulk metal nanomaterials, and in particular relates to a method and special equipment for preparing nanocrystalline ingots by jointly treating metal melts with magnetic field and ultrasonic waves. Background technique [0002] Nano is a unit of length. Nano science and technology is a science and technology that studies the laws of motion and interactions of systems composed of substances with a size between 0.1 and 100 nm, as well as technical problems in possible practical applications. At present, nanomaterials can be roughly divided into six categories: zero-dimensional nanopowders, one-dimensional nanofibers, two-dimensional nanofilms, three-dimensional nanoblocks, nanocomposites, and nanostructures. Among them, metal nanocrystalline materials have small size quantum effects and grain boundary effects due to their small grains, usually less than 100nm, and high interface density, showing a series of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F3/02
Inventor 李军文
Owner LIAONING UNIVERSITY OF TECHNOLOGY
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