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Ceramic granule reinforced aluminium-base composite material and its preparing method

A composite material, a technology to strengthen aluminum base, applied in the field of aluminum base alloy, can solve the problems of changing interface bonding, deterioration, etc., to achieve the effects of increasing wettability, less air intake, and stable performance

Inactive Publication Date: 2007-07-11
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The technical problem to be solved by the present invention is to provide a ceramic particle reinforced aluminum-based composite material and its preparation method, which is a submicron ceramic particle / metal low vacuum stirring infiltration and nano-inoculant grain refinement technology, which overcomes the The disadvantages of poor wettability between ceramic particles and aluminum melt are difficult to add and disperse, and excessive interfacial reaction will form interface brittle phase and brittle layer, resulting in damage of reinforcement, change of matrix composition and deterioration of interface bonding.

Method used

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  • Ceramic granule reinforced aluminium-base composite material and its preparing method
  • Ceramic granule reinforced aluminium-base composite material and its preparing method
  • Ceramic granule reinforced aluminium-base composite material and its preparing method

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Experimental program
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Effect test

Embodiment 2

[0038] Weigh the metal with a weight percentage of 5.5% Si, 0.5% Cu, 0.4% Mg, and the rest of Al, and the reinforcing particles with a particle size of 5-10 μm and a weight percentage of 6% TiN and 6% AlN, and weigh the metal Placed separately from the reinforcing particles; put the prepared metal into the crucible, and then put the crucible into a vacuum induction heating furnace for heating, the vacuum degree is 1.4×10 -3 Pa, the temperature is at 700°C, when the metal matrix is ​​completely melted, add the prepared reinforcement particles and the nano-Al alloy powder inoculant containing 5% Na in an amount of 4g / Kg composite material, and then mechanically stir; The melt of the composite material was poured into the piston metal mold; the model after the mold was released was water-cooled, and then aged at 170°C for 8 hours, thereby preparing the No.2 ceramic particle-reinforced aluminum matrix composite in Table 2.

Embodiment 3

[0040] Weigh the metal with a weight percentage of 6% Si, 2% Cu, 0.5% Mg, and the rest of Al and the reinforcement particles with a particle size of 5-10 μm and a weight percentage of 7.5% TiN and 7.5% AlN, and weigh the metal Place it separately from the reinforcing particles; put the prepared metal into the crucible, then put the crucible into the vacuum furnace for heating, the vacuum degree is 1.5×10 -3 Pa, the temperature is at 720°C, when the metal matrix is ​​completely melted, add the prepared reinforcement particles and the nano-Al alloy powder inoculant containing 4% Na in an amount of 9g / Kg composite material, and then mechanically stir; The melt of the composite material was poured into the bar metal mold; the model after the die was water-cooled, and then aged at 170°C for 8 hours, thereby preparing the No.3 ceramic particle-reinforced aluminum matrix composite in Table 2.

Embodiment 4

[0042] Weigh the metal with a weight percentage of 6.5% Si, 1.5% Cu, 0.5% Mg, and the rest of Al, and the reinforcing particles with a weight percentage of 15% TiN and 10% AlN in the range of 5-10 μm, and weigh the metal Place it separately from the reinforcing particles; put the prepared metal into the crucible, and then put the crucible into a domestic 25Kg vacuum induction heating furnace for heating, the vacuum degree is 1.4×10 -3 Pa, the temperature is at 760°C, when the metal matrix is ​​completely melted, add the prepared reinforcement particles and the nano-Al alloy powder inoculant containing 3% Na in an amount of 12g / Kg composite material, and then mechanically stir; The melt of the composite material was poured into the bar metal mold; the model after the die was water-cooled, and then aged at 170°C for 8 hours, thereby preparing the No.4 ceramic particle-reinforced aluminum matrix composite material in Table 2.

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Abstract

This invention is a ceramic grain reinforcing Al-base compound material and its preparation method, and relates to a Al-base alloy. Its components are: 2.5-15% TiN, 2.4-10%AIN, 4-6.5%Si, 0.5-1.5%Cu, 0.3-0.5%Mg, 0-0.8%Ni, 0-0.5%Ti, and the rest is Al, and the percentages are weight percentages; the preparation method adopts melt blending founding method, and the technique flow is: material matching-melting base body-adding reinforcing grains-melting-modifying treatment-pouring-heat treatment, and the size reinforcing grains is in the range of 5-10 mum, and the vacuum degree of the vacuum furnace is 1.3-1.6X10 to the power -3 Pa, the temperature is 670-800deg.C, the modifying agent is 1-18g / Kg compound material containing 1-6% Na nanometer Al alloy powder; the Al-base compound material of this invention has light weight, high modulus number, high intension, good heat-fast and wearable performances, and the preparation cost is low, the technique is simple and it can be industrially produced.

Description

technical field [0001] The technical solution of the invention relates to an aluminum-based alloy, in particular to a ceramic particle-reinforced aluminum-based composite material and a preparation method thereof. Background technique [0002] Particle-reinforced metal matrix composites, as advanced composite materials, have become a hot research field. Nowadays, many composite materials with certain excellent properties have been developed, but most of them do not show excellent comprehensive mechanical properties. Many composite material systems actually have certain advantages in only one or two performance indicators, such as wear resistance. Other performance indicators, especially the strength indicators are far lower than those of the base alloy. Aluminum matrix composites reinforced with ceramic particles have become one of the most promising new materials in the fields of aerospace industry, automobile industry and sports equipment due to a series of comprehensive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C1/02C22F1/04
Inventor 崔春翔申玉田刘双进王如戚玉敏王新
Owner HEBEI UNIV OF TECH
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