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Method of continuous casting particulate reinforced metal matrix composites on different frequency multi-electromagnetic field

A technology of particle reinforcement and composite materials, applied in the field of material processing, to achieve uniform distribution, good internal quality, and improved friction and wear resistance

Inactive Publication Date: 2010-06-02
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to provide a method for the continuous production of particle-reinforced metal-matrix composites on an industrial scale without defects in continuous casting slabs, that is, particle-reinforced metal-matrix composites. The metal matrix composite material melt is synthesized by in-situ chemical reaction under the action of low-frequency alternating magnetic field electromagnetic stirring (EMS), and a different-frequency composite magnetic field is applied during the continuous casting process, that is, a low-frequency alternating magnetic field is used for electromagnetic stirring to improve the quality of the billet. Internal quality. At the same time, a high-frequency alternating magnetic field is applied to the initial solidification area of ​​the metal in the mold to achieve "soft contact" between the molten metal and the wall of the mold to improve the surface quality of the slab. This technology is an in-situ reaction under electromagnetic stirring Integrated technology of continuous casting molding under synthesis + different frequency composite magnetic field (low frequency alternating magnetic field electromagnetic stirring and high frequency alternating magnetic field soft contact)

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  • Method of continuous casting particulate reinforced metal matrix composites on different frequency multi-electromagnetic field
  • Method of continuous casting particulate reinforced metal matrix composites on different frequency multi-electromagnetic field
  • Method of continuous casting particulate reinforced metal matrix composites on different frequency multi-electromagnetic field

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Embodiment 1

[0034] Implementation example 1: preparation (Al 3 Zr (s) +Al 2 o 3(s) ) particle reinforced A359 matrix composite

[0035] Raw materials: base metal: A359 alloy; solid powder: industrial zirconium carbonate (Zr(CO 3 ) 2 ) powder (purity: 99.20%), refining degassing agent and slag removal agent;

[0036] In situ reaction equation: 7Al (l) +Zr(CO 3 ) 2(s) =Al 3 Zr (s) +2Al 2 o 3(s)

[0037] Particle reinforcement phase: Al 3 Zr (s) and Al 2 o 3(s)

[0038] The operation (preparation) process is divided into three steps:

[0039] (1): Metal smelting and powder preparation:

[0040] The A359 alloy is melted in a 60kW power frequency aluminum melting furnace and the temperature is raised to 900°C, and a degassing agent is added to the metal refining holding furnace 1 for 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 and pack with aluminum foil for use, ...

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Abstract

Disclosed is a method of particle reinforced metal matrix composite continuous casting in compound magnetic field at different frequency, relating to material processing technology field; in the process of the preparation of the composites melt, low-frequency alternating magnetic field is applied: the frequency is from 5 to 50 Hz, the power range is from 5 to 60 kW; electromagnetic stirring is carried out, making the particles to be fined and evenly distributed; in the process of continuous casting, low-frequency alternating magnetic field is applied to the crystallizer zone: the frequency isfrom 5 to 50 Hz, the power range is from 5 to 20 kW; electromagnetic stirring is carried out to improve the internal quality; meanwhile, the high-frequency alternating magnetic field is applied in initial solidification zone in crystallizer: the frequency is from10 to 50 kHz, the power range is from 20 to 100Kw, soft contact is applied to improve the surface quality of casting billet. The composites article reinforcement prepared by the method are evenly distributed and fined, the internal organization is compact without any structural defects such as rarefaction or shrinkage hole, the castingbillet has high surface finish without any defects.

Description

technical field [0001] The invention relates to the technical field of material processing, in particular to a method for in-situ reaction synthesis of particle-reinforced metal-based composite material melts prepared under low-frequency alternating magnetic field electromagnetic stirring and continuous casting molding under different-frequency composite electromagnetic fields. Background technique [0002] Metal matrix composites containing non-metallic reinforcing phases have gradually become a new type of metal functional materials that are more and more widely used due to their composite structural characteristics and good physical, chemical and mechanical properties. According to the shape of the reinforcement phase, the composite materials containing the reinforcement phase 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 compo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/11B22D1/00
Inventor 王宏明李桂荣赵玉涛陈刚
Owner JIANGSU UNIV
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