CN102352449B - Preparation method of in-situ ZrB2 particle reinforced magnesium-based composite - Google Patents

Preparation method of in-situ ZrB2 particle reinforced magnesium-based composite Download PDF

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Publication number
CN102352449B
CN102352449B CN 201110306599 CN201110306599A CN102352449B CN 102352449 B CN102352449 B CN 102352449B CN 201110306599 CN201110306599 CN 201110306599 CN 201110306599 A CN201110306599 A CN 201110306599A CN 102352449 B CN102352449 B CN 102352449B
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China
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preparation
magnesium
zrb2
based composite
zrb
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Expired - Fee Related
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CN 201110306599
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CN102352449A (en
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闫洪
黄文先
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Nanchang University
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Nanchang University
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Abstract

The invention discloses a preparation method of an in-situ ZrB2 particle reinforced magnesium-based composite. The key of the preparation method is preparation of the ZrB2 particle reinforced magnesium-based composite in situ. The preparation method of the magnesium-based composite comprises the following steps: adding 15-25vol.% Al-ZrB2 intermediate alloy in the smelting process of pure magnesium and applying high-energy ultrasound on the melt. The Al-ZrB2 intermediate alloy is prepared by a reaction system of Al, KBF4 and K2ZrF6; as the prices of KBF4 and K2ZrF6 are low, the production cost of the magnesium-based composite can not be increased; and the technology is simple, safe and reliable, is convenient to operate and has no three-waste pollution. The preparation method has the following technical effects: compared with the traditional Mg-Al series alloy material AM60, the second phase Mg17Al12 of the prepared ZrB2 particle reinforced magnesium-based composite changes from continuous netted pages to granules or short blocks, the reinforced phase is dispersed and distributed in the magnesium matrix and the macroscopic distribution is uniform.

Description

A kind of original position ZrB 2The particle reinforced magnesium base compound material preparation method
Technical field
A kind of original position ZrB 2The particle reinforced magnesium base compound material preparation method.
Background technology
During due to the standby metal-base composites of in-situ endogenic legal system, reinforcement at metallic matrix situ forming core, grow up, has Heat stability is good, the reinforcement surface cleaning is pollution-free, and good with the basal body interface consistency, the interface bond strength advantages of higher has become the main direction of 21 century magnesium base composite material research and development.Simultaneously, apply high-energy ultrasonic in the magnesium alloy smelting process, the sound cavitation effect that produces when utilizing the supersound process melt and acoustic streaming effect can make particle disperse in matrix of generation distribute, and change simultaneously size and the pattern of reinforcement and second-phase.Therefore in the preparation process of magnesium base composite material, original position and ultrasonic two kinds of means are combined, that obtains is respond well.But utilize at present the method to prepare ZrB 2Particle reinforced magnesium base compound material yet there are no report.
Summary of the invention
The object of the present invention is to provide a kind of original position ZrB 2The particle reinforced magnesium base compound material preparation method, the method is utilized KBF 4And K 2ZrF 6Price is very cheap, can not improve the magnesium base composite material production cost.
The present invention is achieved like this, and method steps is: the Al-ZrB that is made volume fraction 15-25% by Al, KBF4 and K2ZrF6 reaction system 2Master alloy is put into crucible with the 200 pure magnesium of gram, at CO 2+ SF 6Be heated to 720 ℃ under mixed gas protected, then will be preheated to the Al-ZrB of 200 ℃ 2Master alloy joins in the melt of molten state, and the add-on that master alloy adds is 5%-10%, is warming up to 740-760 ℃, simultaneously, melt is applied high-energy ultrasonic, and ultrasonic power is 400-800W, standing 10-15min, skim, refining, be cast in metal pattern preparation original position ZrB in 710 ℃ 2Strengthen magnesium base composite material.
Technique effect of the present invention is: the present invention prepares ZrB 2The microtexture that strengthens magnesium base composite material is compared with traditional magnesium aluminum series alloy material AM60, second-phase Mg 17Al 12Become particulate state by continuous netted paging, or the short block shape, the wild phase disperse is distributed in magnesium matrix, and macroscopic view is evenly distributed.
Embodiment
The present invention will be described further by following examples.
Example 1: with industrial KBF 4And K 2ZrF 6(Zr:B=1:2.2) powder at 200 ℃ of baking 8h, is removed crystal water; Then with KBF 4And K 2ZrF 6Powder fully mixes 24h on mixer; 200 ℃ of technical pure aluminium ingots of preheating are put into plumbago crucible, utilize resistance furnace to be heated to 850 ℃, then with KBF 4And K 2ZrF 6Powder is pressed in molten aluminium by bell jar in batches, and the preparation volume fraction is 20% Al-ZrB 2Master alloy is standby.The 200 pure magnesium of gram are put into crucible, at CO 2+ SF 6Be heated to 720 ℃ under mixed gas protected, then will be preheated to 200 ℃ of volume fractions and be 20% Al-ZrB 2In the melt that joins molten state of master alloy by 5% amount, be warming up to 740 ℃, simultaneously, it is the 400W high-energy ultrasonic that melt is applied power, and standing 15min skims, refining, is cast in metal pattern preparation original position ZrB in 710 ℃ 2Strengthen magnesium base composite material.
Example 2: with industrial KBF 4And K 2ZrF 6(Zr:B=1:2.2) powder at 200 ℃ of baking 8h, is removed crystal water; Then with KBF 4And K 2ZrF 6Powder fully mixes 24h on mixer; 200 ℃ of technical pure aluminium ingots of preheating are put into plumbago crucible, utilize resistance furnace to be heated to 850 ℃, then with KBF 4And K 2ZrF 6Powder is pressed in molten aluminium by bell jar in batches, and the preparation volume fraction is 25% Al-ZrB 2Master alloy is standby.The 200 pure magnesium of gram are put into crucible, at CO 2+ SF 6Be heated to 720 ℃ under mixed gas protected, then will be preheated to 200 ℃ of volume fractions and be 25% Al-ZrB 2Master alloy joins in the melt of molten state by 10% amount, is warming up to 760 ℃, and simultaneously, it is the 800W high-energy ultrasonic that melt is applied power, and standing 10min skims, refining, is cast in metal pattern preparation original position ZrB in 710 ℃ 2Strengthen magnesium base composite material.

Claims (1)

1. original position ZrB 2The particle reinforced magnesium base compound material preparation method, its characterization method step is: by Al, KBF 4And K 2ZrF 6Reaction system makes the Al-ZrB of volume fraction 15-25% 2Master alloy is put into crucible with the 200 pure magnesium of gram, at CO 2+ SF 6Be heated to 720 ℃ under mixed gas protected, then will be preheated to the Al-ZrB of 200 ℃ 2Master alloy joins in the melt of molten state, and the add-on that master alloy adds is 5%-10%, is warming up to 740-760 ℃, simultaneously, melt is applied high-energy ultrasonic, and ultrasonic power is 400-800W, standing 10-15min, skim, refining, be cast in metal pattern preparation original position ZrB in 710 ℃ 2Strengthen magnesium base composite material.
CN 201110306599 2011-10-12 2011-10-12 Preparation method of in-situ ZrB2 particle reinforced magnesium-based composite Expired - Fee Related CN102352449B (en)

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Application Number Priority Date Filing Date Title
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CN102352449B true CN102352449B (en) 2013-05-22

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103045892B (en) * 2013-01-04 2015-01-28 南昌大学 Preparation method of Al2Y particle reinforced magnesium matrix composite

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* Cited by examiner, † Cited by third party
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CN1298879C (en) * 2004-02-19 2007-02-07 上海交通大学 Process of preparing composite material with in situ particle inhancing magnesium base
CN101177742A (en) * 2007-11-08 2008-05-14 上海交通大学 Method for in-situ preparation of TiBO2 reinforced magnesium-based composite material
CN101532098A (en) * 2009-04-22 2009-09-16 南昌大学 Method for preparing SiCp/AZ31 magnesium-based nano composite material using ultrasonic wave

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