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Metal matrix composition home-position synthesizing method in combined electric magnetic field

A composite material and metal-based technology, which is applied in the field of material preparation to achieve the effects of shortening stirring time, improving stirring efficiency and fine-grained melt particle phase.

Active Publication Date: 2009-03-25
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The helical stirring under the combined magnetic field can overcome the deficiency of electromagnetic stirring in a single magnetic field, and make the distribution of the particle phase in the melt more uniform and fine. figure 1 ,analyse as below:

Method used

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  • Metal matrix composition home-position synthesizing method in combined electric magnetic field
  • Metal matrix composition home-position synthesizing method in combined electric magnetic field
  • Metal matrix composition home-position synthesizing method in combined electric magnetic field

Examples

Experimental program
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Effect test

Embodiment

[0021] Implementation example: preparation (Al 3 Zr (s) +Al 2 o 3(s) ) particle reinforced A356 matrix composite

[0022] Raw materials: base metal: A356 alloy; solid powder: industrial zirconium carbonate (Zr(CO 3 ) 2 ) powder (purity: 99.20%), refining degassing agent and slag removal agent;

[0023] In situ reaction equation: 7Al (l) +Zr(CO 3 ) 2(s) =Al 3 Zr (s) +2Al 2 o 3(s)

[0024] Particle reinforcement phase: Al 3 Zr (s) and Al 2 o 3(s)

[0025] The preparation process is divided into two steps:

[0026] (1): Metal smelting and powder preparation:

[0027] The A356 alloy is melted in a 60kW power frequency aluminum melting furnace and heated up to 900°C for degassing and slag removal. All reagents used were fully dried at 250°C to 300°C, among which Zr(CO 3 )2 Grind into fine powder (particle size less than 100μm), weigh it and put it into the spray tank, Zr(CO 3 ) 2 The added weight is 10% of the metal weight (note: the theoretical volume fracti...

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Abstract

The invention provides a method for continuously producing particle reinforced metal matrix composites in an industrial scale, which adopts the synthesis of metal matrix composites in a combination magnetic field. The method is characterized in that: the combination of a rotating magnetic field and a travelling wave magnetic field is adopted to synthesize a preparation particle reinforced metal matrix composite fused mass in the in-situ synthesis process of composites. The low frequency rotating magnetic field is placed at the outer side of a composite material molten pool, and the center of a coil of the magnetic field and the center of the fused mass are at the same height; and the travelling wave magnetic field is exerted at the bottom part of the composite material molten pool, and the coil center of the travelling wave magnetic field and the center of the composite material molten pool are at the same position. The composite material particle reinforced phases prepared by the method are distributed evenly and thinned, interior tissues are compact and have no structural defects such as loosening and hole shrinkage, the degree of finish of external surfaces of casting blanks is high, defects are eliminated, and the friction resistance and the abrasion resistance of the composites are obviously improved.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a new method for synthesizing a metal-based composite material of an endogenous particle-reinforced phase by combining a melt reaction under an electromagnetic field. Background technique [0002] Particle-reinforced metal matrix composites have become a new type of metal functional material that is more and more widely used because of its composite structure characteristics and good physical, chemical and mechanical properties. According to the morphology of the reinforced phase, metal matrix composites are mainly divided into two categories: particle reinforced metal matrix composites and fiber reinforced metal matrix composites. The outstanding advantages of particle-reinforced metal matrix composites are high specific strength, low reinforcement cost, relatively uniform microstructure, isotropic material properties, and secondary molding by traditional processing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/115B22D1/00
Inventor 赵玉涛王宏明陈刚李桂荣程晓农
Owner JIANGSU UNIV
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