Method for adding carbon nano tube into metal bath

A carbon nanotube and metal melt technology is applied in the processing technology of refining metal grain size, the preparation of metal composite materials and the fields of metal smelting and processing, and can solve the problems of many pores, uneven particle distribution, segregation and the like in castings. To achieve the effect of low production cost, simple process and improved dispersion degree

Inactive Publication Date: 2009-10-28
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stirring casting method has simple equipment and high production efficiency, but the casting has many pores and uneven particle distribution, which is easy to form segregation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: at first with good aluminum powder, zinc powder, carbon nanotube, stearic acid alcohol solution is mixed in ball mill and handles 20 minutes, separates grinding ball with 50 mesh screens, obtains the mixing of making carbon nanotube adding block Put the mixed material into a mold preheated to 80°C for 20 minutes and take it out to make a carbon nanotube / metal composite briquette. AZ91 magnesium alloy is smelted under the protection of argon. When the temperature of the magnesium metal liquid reaches 680°C, skim off the slag on the surface of the metal melt, press the carbon nanotube / aluminum composite compact into the magnesium liquid with a bell jar, and add 0.5%~ The 1.5% RJ-2 flux plays the role of refining and covering, moving the bell jar and stirring slowly for about 2-5 minutes. Continue to heat the alloy melt to 700°C, add 0.5% to 0.8% hexachloroethane to refine the magnesium alloy melt, then evenly sprinkle a layer of RJ-2 flux, lower the temperat...

Embodiment 2

[0015] Embodiment 2: First, mix ferrosilicon powder, iron powder, carbon nanotubes and stearic acid alcohol solution in a high-speed ball mill under argon protection for 30 minutes, and separate the grinding balls with a 50-mesh screen to obtain carbon nanotubes. The mixture of the tube / metal composite briquette is put into a mold preheated to 80° C. and kept under pressure for 20 minutes to take it out to make a carbon nanotube / metal composite briquette. No. 45 steel is smelted in an induction furnace. When the molten steel is ready to be released from the furnace, the carbon nanotube / metal composite briquette is preset at the bottom of the ladle, the molten steel is tapped, and the casting is cast to obtain a steel casting with carbon nanotubes added.

Embodiment 3

[0016] Embodiment 3: First, the prepared ferrosilicon powder, iron powder, carbon nanotubes, and stearic acid alcohol solution were mixed and treated for 30 minutes under the protection of argon in a high-speed ball mill, and the grinding balls were separated with a 50-mesh screen to obtain carbon nanotubes. The mixture of the tube / metal composite briquette is put into a mold preheated to 80° C. and kept under pressure for 20 minutes to take it out to make a carbon nanotube / metal composite briquette. No. 45 steel is melted in an induction furnace. When the molten steel is ready to be released from the furnace, the carbon nanotube / metal composite briquette is preset at the bottom of the ingot mold, the molten steel is tapped, and the ingot is cast to obtain a steel ingot with carbon nanotubes added.

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PUM

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Abstract

The invention relates to a method for adding carbon nano tube into metal bath, which is characterized in mixing carbon nano tube, metal powder and stearic acid according to a weight ratio between the carbon nano tube and metal powder of 1:10-2, and a weight ratio between stearic acid, carbon nano tube and metal powder of 1:15-20, putting into a ball mill for ball milling, sieving with a 50-80 mesh stainless steel sieve to obtain a uniform mixture, adding the mixture into the mold, pressing for molding to obtain carbon nano tube / metal composite press block; adding the carbon nano tube / metal composite press block into a metallic or alloy solution, regulating temperature of fused mass to a casting temperature, casting the article.

Description

technical field [0001] The invention belongs to the fields of preparing metal composite materials and metal smelting processing, and in particular relates to the technical field of processing technology for preparing metal matrix composite materials or refining metal crystal grain size by adding carbon nanotubes to metal melts. Background technique [0002] At present, the preparation techniques and methods of carbon nanotube reinforced metal matrix composites are mainly stirred casting method and powder metallurgy method. The powder metallurgy method is to mechanically mix carbon nanotubes with fine and pure metal powder, press them in a mold, and then heat them for sintering, so that the reinforcing phase and the metal matrix are aggregated into one, and the metal / carbon nanotube composite material is made. . The advantage of the powder metallurgy method is that the metal matrix does not have to go through the high-temperature state of complete melting during the preparat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C1/05
Inventor 曾效舒周国华徐强朱丹
Owner NANCHANG UNIV
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