A kind of nanoparticle uniformly dispersed aluminum-based intermediate and its preparation and application method

A nanoparticle, uniformly dispersed technology, applied in the field of iron and steel metallurgy, can solve the problems of nanoparticle agglomeration and low yield, and achieve the effects of ensuring stable yield, improving wettability, and eliminating steel performance hazards

Active Publication Date: 2021-10-22
ANGANG STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a preparation and application method of uniformly dispersed aluminum-based intermediates of nanoparticles, and prepare aluminum-based intermediates by uniformly dispersing nanoparticles into aluminum liquid, so as to solve the problems of agglomeration and yield of nanoparticles low problem

Method used

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  • A kind of nanoparticle uniformly dispersed aluminum-based intermediate and its preparation and application method

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A method for preparing an aluminum-based intermediate evenly dispersed by nanoparticles, comprising the following steps:

[0036] (1) Weigh MgO nanopowder and pure aluminum block according to the volume ratio of 1:9. The pure aluminum block is placed in a graphite crucible and then placed in an intermediate frequency induction furnace, heated by electricity, when the melt temperature rises to 880°C, it is kept at this temperature, and carbonized rice husk is used as a covering agent in the remelting process.

[0037] (2) The molten aluminum is melted and slag removed, the graphite crucible is taken out and put into a spiral electromagnetic stirrer, the stirring current is set to 100A, and the frequency is 30Hz. Immerse the ultrasonic transmitter head in the aluminum liquid through the lifting device to a depth of 30mm to preheat. After preheating for 8 minutes, set the output power of the ultrasonic processor to 0.8kW and the frequency to 20Hz.

[0038](3) Turn on the ...

Embodiment 2

[0041] A preparation method for uniformly dispersing aluminum-based intermediates with nanoparticles. The basic experimental steps of this example are the same as those in Example 1, except that MgO nanopowder is dispersed into aluminum liquid at a volume ratio of 1:6 to prepare a volume The fraction is about 14% MgO nanopowder aluminum based intermediate. The output power of the ultrasonic processor is 0.86kW, the current of the spiral electromagnetic stirrer is 180A, the frequency is 38Hz, and the other parameters are the same as in Embodiment 1.

Embodiment 3

[0043] A preparation method for uniformly dispersing aluminum-based intermediates with nanoparticles, the basic experimental steps of this embodiment are the same as those in Example 1, the difference is that MgO nano powder is dispersed into aluminum liquid at a volume ratio of 1:4.5, and prepared into a volume The fraction is about 18% MgO nanopowder aluminum based intermediate. The output power of the ultrasonic processor is 0.92kW, the current of the spiral electromagnetic stirrer is 250A, the frequency is 45Hz, and the other parameters are the same as in Embodiment 1.

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Abstract

The invention relates to a uniformly dispersed aluminum-based intermediate of nanoparticles, which comprises uniformly dispersed oxide nanoparticles with a volume fraction of 10% to 20%, the particle size of the oxide nanoparticles is between 25nm and 50nm, and the oxide nanoparticles are CaO nanopowder, MgO nanopowder and Al 2 o 3 One of the nano powders, the rest is Al. The invention combines the ultrasonic dispersion technology and the spiral electromagnetic stirring technology to uniformly disperse the nanoparticles into the aluminum liquid to prepare an aluminum-based intermediate, so as to solve the agglomeration of the nanoparticles. The process is simple and the cost is low, and the dispersed distribution of nanoparticles in the aluminum matrix is ​​realized. In the process of steelmaking, aluminum-based intermediates are used to participate in the final deoxidation, and nanoparticles are added to molten steel to increase the nucleation core of finely dispersed foreign solids, which serve as the precipitation core of nascent alumina inclusions, disperse the quality of inclusions, and reduce inclusions Size, refine aluminum oxide inclusions in molten steel, and eliminate the damage of inclusions to steel performance. Improve the mechanical properties and surface quality of steel.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgy, in particular to an aluminum-based intermediate uniformly dispersed with nanoparticles and a preparation and application method. Background technique [0002] With the development of science and production technology, the requirements for steel quality are getting higher and higher. Therefore, it is strongly desired to develop a steel having more excellent properties. Coarse inclusions in steel, especially aluminum oxide inclusions with high melting point and high hardness, are one of the main factors affecting the properties of steel. With the development of steelmaking technology, the cleanliness of steel has been continuously improved. Inclusions in steel The size of the object is gradually showing a trend of ultra-fine. [0003] As we all know, at present, almost all steels use aluminum final deoxidation to reduce the oxygen content in steel. Since there are not a large number of di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/06C22C1/02C22C21/00C22C21/06C22C32/00C22C38/02C22C38/04C22C38/06
CPCC21C7/0006C21C7/06C22C1/026C22C21/00C22C21/06C22C32/0036C22C38/002C22C38/02C22C38/04C22C38/06
Inventor 康磊廖相巍郭庆涛尚德礼贾吉祥唐雪峰于明光康伟吕春风董刚
Owner ANGANG STEEL CO LTD
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