Magnesium alloy bused composite material and preparing method thereof

A composite material and magnesium alloy technology, which is applied in the field of magnesium alloy-based composite materials and its preparation in the form of particle reinforcement, can solve the problems of TiC hardness decrease and composite material performance degradation, and achieve uniform distribution, not easy to segregate, and good interface bonding Effect

Inactive Publication Date: 2004-01-28
JILIN UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, TiC in the composite materials prepared by the above process often exists in the form of C vacancy, and the hardness of TiC in the vacancy form decreases, which cannot fully exert its reinforcing effect; and if the process is not properly controlled during the preparation process, it is easy to form a brittle phase Til 3 , resulting in a decrease in the performance of the composite

Method used

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  • Magnesium alloy bused composite material and preparing method thereof
  • Magnesium alloy bused composite material and preparing method thereof
  • Magnesium alloy bused composite material and preparing method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of 10% TiB 2 / AZ91 composite material

[0033] The Al powder of ~29 microns, the Ti powder of ~15 microns, and the B powder of ~3 microns are taken, and the matrix magnesium alloy adopts AZ91 die-casting magnesium alloy, pure magnesium ingot and pure zinc ingredients. The above three powders are mixed in a small roller mill for 8 hours according to the ratio of atomic ratio Ti: B=0.5 and Al content of 50% by weight, and then pressed into a cylindrical reaction prefabricated block of φ55×30 on a 20-ton press , The compaction rate of the green compact is 75% of the theoretical density of the mixed powder. Place the reaction prefabricated block in a vacuum heating device, and raise the temperature to 660°C at a heating rate of 20°C / min to initiate a chemical synthesis reaction, and the product is TiB 2 / Al mesophase carrier, its microscopic scanning structure, energy spectrum analysis and X-ray diffraction analysis such as figure 1 , figure 2 and image 3...

Embodiment 2

[0035] Preparation of 13% TiB 2 / ZM5 composite material

[0036] Al powder of ~74 microns, Ti powder of ~74 microns and B powder of ~3 microns are taken, and ZM5, pure magnesium ingot and pure zinc are used as ingredients for the matrix magnesium alloy. The above three kinds of powders are mixed according to the atomic ratio Ti: B=0.55, and the Al content is 35% by weight, mixed in a small roller mill for 12h, and then pressed into a cylindrical reaction prefabricated block of φ55×25 on a 20-ton press, pressed The billet compaction rate is 70% of the theoretical density of the mixed powder. Place the reaction prefabricated block in a heating device under the protection of high-purity argon, and raise the temperature to 760°C at a heating rate of 30°C / min to initiate a chemical synthesis reaction to prepare TiB 2 / Al mesophase support, which subsequently contains the corresponding TiB 2 The mesophase carrier of the ceramic particles was added to the magnesium alloy solution ...

Embodiment 3

[0038]Preparation of 3% TiB 2 / AZ91 composite material

[0039] The Al powder of ~29 microns, the Ti powder of ~15 microns, and the B powder of ~3 microns are taken, and the matrix magnesium alloy is AZ91. The above three powders are mixed in a small roller mill for 8 hours according to the atomic ratio Ti: B=0.5, and the Al content is 40% by weight, and then pressed into a cylindrical reaction prefabricated block of φ55×30 on a 20-ton press , The compaction rate of the green compact is 80% of the theoretical density. Place the reaction prefabricated block in a vacuum heating device, and raise the temperature to 660°C at a heating rate of 10°C / min to initiate a chemical synthesis reaction, and the product is TiB 2 / Al mesophase carrier. This subsequently contains the corresponding TiB 2 The mesophase carrier of the ceramic particles was added into the molten magnesium at 700°C protected by a flux, and stirred after the mesophase carrier was melted, the stirring temperature...

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Abstract

The present invention relates to a magnesium alloy base composite material, and is characterized by that it is a reinforced composite material obtained by making TiB2 granules be dispersed and uniformly distributed in the magnesium alloy base body. Its preparation includes the following processes: preparing reaction prefabricated block, preparing intermediate phase carrier containing reinforcement granules, dissolving and diffusing the intermediate phase carrier in magnesium alloy base body and dispersing and distributing the reinforcement granules in the magnesium alloy base body. Said composite material has good comprehensive performance, so that it has extensive application range.

Description

technical field [0001] The invention relates to a magnesium alloy-based composite material, in particular to a magnesium alloy-based composite material in a particle-reinforced manner and a preparation method thereof. Background technique [0002] Magnesium alloy-based composites have attracted more and more attention in the fields of automobiles, aviation and aerospace due to their excellent comprehensive properties such as low density, high specific strength and specific modulus, good wear resistance and high temperature creep performance. At present, the reinforcement methods of magnesium alloy matrix composites mainly include fiber reinforcement and particle reinforcement. Due to the complex fiber reinforcement process, high cost, poor wettability with the matrix, and poor machinability of continuous fiber reinforcement, the promotion and application of fiber reinforced magnesium alloy matrix composites are greatly limited, and it is difficult to achieve large-scale prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C23/00
Inventor 姜启川王慧远赵峰李新林关庆丰赵宇光赵玉谦王金国徐伟东
Owner JILIN UNIV
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