CN102329993A - High-boron and high-carbon aluminum-based intermediate alloy and preparation method thereof - Google Patents
High-boron and high-carbon aluminum-based intermediate alloy and preparation method thereof Download PDFInfo
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- CN102329993A CN102329993A CN 201110263948 CN201110263948A CN102329993A CN 102329993 A CN102329993 A CN 102329993A CN 201110263948 CN201110263948 CN 201110263948 CN 201110263948 A CN201110263948 A CN 201110263948A CN 102329993 A CN102329993 A CN 102329993A
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Abstract
The invention belongs to the field of metallic materials and relates to a high-boron and high-carbon aluminum-based intermediate alloy and a preparation method thereof. The high-boron and high-carbon aluminum-based intermediate alloy comprises 81.0-93.0 percent of aluminum, 4.1-15.4 percent of boron, 2.1-6.5 percent of carbon and 0.6-2.0 percent of nitrogen, and is prepared by the following steps of: uniformly mixing aluminum powder, boron carbide powder, graphite powder and boron nitride powder and ball milling; and forming the mixture by using one-way die pressing and then placing a briquette in vacuum for sintering and insulating at the heat insulating temperature of 690-1100DEG C for 0.5-4h. The preparation method has low cost, a simple process and no pollution and is suitable for industrial production; and the prepared high-boron high-carbon aluminum-based intermediate alloy has a remarkable grain refining effect on magnesium and a magnesium alloy, can also be used for refining an aluminum-silicon alloy and can be used as a raw material for preparing a high-efficiency aluminum alloy refiner.
Description
Technical field
The invention belongs to metal material field; Be particularly related to aluminium base master alloy of a kind of high boron high-carbon and preparation method thereof; It not only can be used for refinement magnesium and magnesiumalloy; And ability refinement aluminum silicon alloy, can be used as a kind of raw material in addition and prepare duraluminum fining agent-aluminium-titanium-carbon-boron-nitrogen and aluminium-titanium-B-C-N master alloy.
Background technology
Magnesiumalloy has that density is little, specific tenacity and advantage such as specific rigidity is high, excellent earthquake resistance and machinability are good; It is a kind of structured material that haves a great attraction; Obtain application more and more widely in fields such as automotive industry that needs lightweight and energy-saving and emission-reduction and aerospace, become the third-largest metallic substance after iron and steel and duraluminum.But thick α-Mg dendrite makes its plastic deformation ability very poor, to a great extent limit Application of Magnesium.Discover that tiny equi-axed crystal not only can improve the plastic deformation ability of magnesiumalloy, and improve its intensity with the mode of refined crystalline strengthening.Therefore, Application of Magnesium be unable to do without grain refining.
Whether magnesiumalloy contains aluminium element according to it and is divided into two big types, promptly aluminiferous magnesiumalloy and not aluminiferous magnesiumalloy.For not aluminiferous magnesiumalloy, add significantly crystal grain thinning of zirconium; And contain aluminum magnesium alloy is present commercial magnesiumalloy the most widely, and its thinning method mainly contains: the bakingout process method, add carbon method (as adding Graphite Powder 99, carbide, carbonate, Sesquichloratum etc.), add foreign particle (Al
4C
3, TiB
2, AlN, AlB
2Deng) method etc.But the bakingout process method makes the oxidation aggravation of alloy; Though add the carbon method and be at present the most effectively crystal fining method, also there are some problems in it, like Al
4C
3Thinning effect is unstable, and Sesquichloratum can discharge obnoxious flavour contaminate environment or the like.In a word, also there is not the grain-refining agent that contains aluminum magnesium alloy that a kind of pollution-free, thinning effect is stable, be fit to suitability for industrialized production.Application number is the preparation method that the Chinese patent of 200810049548.X has been reported the nitrogenous fining agent of a kind of used for magnesium alloy, promptly in containing the aluminum magnesium alloy melt, adds a certain amount of Mg
3N
2Thereby the powder original position generates the heterogeneous forming core substrate AlN of magnesium.But because Mg
3N
2Powder is for adding, and adds difficulty and disperses inhomogeneously, influences thinning effect.Document (Journal of Alloys and Compounds; 2010; 491:165-169) reported a kind of Al-1B-0.6C master alloy, its preparation method adds graphite precast body and aluminum-boron alloy in molten aluminium, generated a kind of heterogeneous forming core substrate Al of magnesium
3The BC particle, it has tangible thinning effect to magnesiumalloy.But the preparation temperature of this technology is too high, and is high to equipment and processing requirement, organizes waywardly, and the second phase population is less, and the easy oxidation of master alloy.The Chinese patent of application number 2010102661551 has been reported a kind of aluminium-B-C-N master alloy and preparation method thereof; Be to adopt preparations such as aluminium-boron and aluminium-carbon master alloy, raw materials used cost is higher, and technology is complicated; And constituent contents such as boron carbon are low; The second phase number of particles is less in the master alloy, large usage quantity during the refinement magnesiumalloy, and use cost is high.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, the aluminium base master alloy of high boron high-carbon of a kind of effectively refinement magnesium and magnesiumalloy be provided, and provide that a kind of cost is low, technology is simple, pollution-free, the preparation method that is fit to suitability for industrialized production.
The present invention realizes in the following manner:
The aluminium base master alloy of a kind of high boron high-carbon contains aluminium, boron, carbon, four kinds of elements of nitrogen, it is characterized in that it contains the boron of high level, carbon; The mass percent of each component is respectively: aluminium 81.0%-93.0%; Boron 4.1%-15.4%, carbon 2.1%-6.5%, nitrogen 0.6%-2.0%.The disperse micron-sized Al that distributing in this master alloy
3BC, Al
4C
3, AlB
2, AlB
12Grade in an imperial examination two-phase particle, quantity is more, and a part of particle trace nitrogen that mixed, and has formed some AlN in addition, and these particles have played the effect of the heterogeneous forming core substrate of α-Mg directly or indirectly.Through changing proportioning raw materials and preparation temperature, can realize the tissue regulation and control to it.
The preparation method of the aluminium base master alloy of above-mentioned high boron high-carbon is characterized in that may further comprise the steps:
(1) is ready to desired raw material by following mass percent: 81.0%-93.0% aluminium powder (50～300 microns of granularities), 4.4%-16.8% boron carbide powder (0.1～6.0 micron of granularity), 0.1%～5.5% Graphite Powder 99 (1～10 micron of granularity), 0.6%-2.0% boron nitride powder (0.1～6.0 micron of granularity);
(2) above-mentioned powder is even, ball milling in high energy ball mill, and single way stempressing becomes block;
(3) briquetting is put into vacuum oven and carry out sintering, holding temperature is 690～1100 ℃, and soaking time is 0.5～4 hour.Thereby prepare the aluminium base master alloy of block high boron high-carbon, or be squeezed into the sintering test block bar-shaped at a certain temperature.
Mass percent with each component in the aluminium base master alloy of high boron high-carbon of this method preparation is respectively: aluminium 81.0%-93.0%, boron 4.1%-15.4%, carbon 2.1%-6.5%, nitrogen 0.6%-2.0%.
The present invention is a raw material with aluminium powder, boron carbide powder, Graphite Powder 99, boron nitride powder, and in the sintering process, interaction between these raw materials, original position have generated the second phase particle that quantity is more and disperse distributes, Al
3BC, Al
4C
3, AlB
2, AlB
12, AlN, formed some nitrogen doped particles in addition, like Al
3(B, C, N), Al
4(C, N)
3, Al (B, N)
2, Al (B, N)
12Deng.The refinement test shows that the aluminium base master alloy of this high boron high-carbon also has aluminum silicon alloy to have good grain refining effect to magnesium and magnesiumalloy, can be used as the raw material of efficient duraluminum fining agent aluminium-titanium-carbon-boron-nitrogen and aluminium-titanium-B-C-N in addition.This preparation method has that technology is easy, raw material availability is high, pollution-free and low cost and other advantages, is fit to scale operation and application.
Embodiment
Provide three most preferred embodiments of the present invention below.
Embodiment 1
(1) at first is ready to desired raw material: 84.3% aluminium powder (50～300 microns of granularities), 15.0% boron carbide powder (0.1～6.0 micron of granularity), 0.1% Graphite Powder 99 (1～10 micron of granularity), 0.6% boron nitride powder (0.1～6.0 micron of granularity) by following mass percent;
(2) with above-mentioned powder evenly after, ball milling in high energy ball mill becomes bulk with the hydropress single way stempressing;
(3) briquetting is put into the vacuum oven sintering, holding temperature is 850 ℃, is incubated 2.5 hours, thereby prepares the aluminium base master alloy of block high boron high-carbon, or is squeezed into the sintering test block bar-shaped at a certain temperature.
According to the aluminium base master alloy of high boron high-carbon of said ratio and prepared, the mass percent of its chemical ingredients is: boron 12.6%, and carbon 3.1%, nitrogen 0.6%, surplus is an aluminium.
Embodiment 2
(1) at first is ready to desired raw material: 89.0% aluminium powder (50～300 microns of granularities), 7.0% boron carbide powder (0.1～6.0 micron of granularity), 3.0% Graphite Powder 99 (1～10 micron of granularity), 1.0% boron nitride powder (0.1～6.0 micron of granularity) by following mass percent;
(2) with above-mentioned powder evenly after, ball milling in high energy ball mill becomes bulk with the hydropress single way stempressing;
(3) briquetting is put into the vacuum oven sintering, holding temperature is 900 ℃, is incubated 1.5 hours, thereby prepares the aluminium base master alloy of block high boron high-carbon, or is squeezed into the sintering test block bar-shaped at a certain temperature.
According to the aluminium base master alloy of high boron high-carbon of said ratio and prepared, the mass percent of its chemical ingredients is: boron 6.6%, and carbon 4.4%, nitrogen 1.0%, surplus is an aluminium.
Embodiment 3
(1) at first is ready to desired raw material: 89.6% aluminium powder (50～300 microns of granularities), 4.5% boron carbide powder (0.1～6.0 micron of granularity), 5.1% Graphite Powder 99 (1～10 micron of granularity), 0.8% boron nitride powder (0.1～6.0 micron of granularity) by following mass percent;
(2) with above-mentioned powder evenly after, ball milling in high energy ball mill becomes bulk with the hydropress single way stempressing;
(3) briquetting is put into the vacuum oven sintering, holding temperature is 950 ℃, is incubated 1 hour, thereby prepares the aluminium base master alloy of block high boron high-carbon, or is squeezed into the sintering test block bar-shaped at a certain temperature.
According to the aluminium base master alloy of high boron high-carbon of said ratio and prepared, the mass percent of its chemical ingredients is: boron 4.4%, and carbon 6.0%, nitrogen 0.8%, surplus is an aluminium.
Claims (3)
1. the one kind high aluminium base master alloy of boron high-carbon comprises aluminium, boron, carbon, four kinds of elements of nitrogen, it is characterized in that the mass percent of each component is: aluminium 81.0%-93.0%, boron 4.1%-15.4%, carbon 2.1%-6.5%, nitrogen 0.6%-2.0%.
2. the preparation method of the one kind high aluminium base master alloy of boron high-carbon is characterized in that may further comprise the steps:
(1) is ready to desired raw material by following mass percent: 81.0%-93.0% aluminium powder, 4.4%-16.8% boron carbide powder, 0.1%～5.5% Graphite Powder 99,0.6%-2.0% boron nitride powder;
(2) above-mentioned powder is even, ball milling in high energy ball mill, and single way stempressing becomes block;
(3) briquetting is put into vacuum oven and carry out sintering, holding temperature is 690～1100 ℃, and soaking time is 0.5～4 hour, thereby prepares the aluminium base master alloy of block high boron high-carbon, or is squeezed into the sintering test block bar-shaped.
3. the preparation method of the aluminium base master alloy of a kind of high boron high-carbon according to claim 2; It is characterized in that aluminum powder particle size is 50～300 microns in the step (1); The boron carbide powder granularity is 0.1～6.0 micron, and the Graphite Powder 99 granularity is 1～10 micron, and the boron nitride powder granularity is 0.1～6.0 micron.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014411A (en) * | 2012-12-25 | 2013-04-03 | 东南大学 | Sn-Nd-Ni intermediate alloy and preparation method thereof |
| CN104120310A (en) * | 2014-08-04 | 2014-10-29 | 山东大学 | Aluminum-based composite material and preparation method thereof |
| CN105385902A (en) * | 2015-12-10 | 2016-03-09 | 山东大学 | AIN and AIB2 particle reinforced aluminum matrix composite material and preparation method thereof |
| CN109439948A (en) * | 2018-12-20 | 2019-03-08 | 中国兵器科学研究院宁波分院 | A kind of nanometer fining agent and preparation method thereof for aluminium alloy |
| CN112921226A (en) * | 2021-02-16 | 2021-06-08 | 河南工学院 | Mg-AlN master alloy grain refiner for magnesium-aluminum alloy and preparation method thereof |
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| US5419789A (en) * | 1992-09-11 | 1995-05-30 | Ykk Corporation | Aluminum-based alloy with high strength and heat resistance containing quasicrystals |
| EP1205567A2 (en) * | 2000-11-10 | 2002-05-15 | Alcoa Inc. | Production of ultra-fine grain structure in as-cast aluminium alloys |
| JP2004076110A (en) * | 2002-08-20 | 2004-03-11 | Toyota Central Res & Dev Lab Inc | Aluminum cast alloy for piston, piston and method for producing the same |
| CN101928862A (en) * | 2010-08-30 | 2010-12-29 | 山东大学 | Aluminum-boron-carbon-nitrogen master alloy and preparation method thereof |
| CN102094132A (en) * | 2010-12-28 | 2011-06-15 | 中国工程物理研究院核物理与化学研究所 | Method for preparing B4C-Al composite material |
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2011
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5419789A (en) * | 1992-09-11 | 1995-05-30 | Ykk Corporation | Aluminum-based alloy with high strength and heat resistance containing quasicrystals |
| EP1205567A2 (en) * | 2000-11-10 | 2002-05-15 | Alcoa Inc. | Production of ultra-fine grain structure in as-cast aluminium alloys |
| JP2004076110A (en) * | 2002-08-20 | 2004-03-11 | Toyota Central Res & Dev Lab Inc | Aluminum cast alloy for piston, piston and method for producing the same |
| CN101928862A (en) * | 2010-08-30 | 2010-12-29 | 山东大学 | Aluminum-boron-carbon-nitrogen master alloy and preparation method thereof |
| CN102094132A (en) * | 2010-12-28 | 2011-06-15 | 中国工程物理研究院核物理与化学研究所 | Method for preparing B4C-Al composite material |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014411A (en) * | 2012-12-25 | 2013-04-03 | 东南大学 | Sn-Nd-Ni intermediate alloy and preparation method thereof |
| CN104120310A (en) * | 2014-08-04 | 2014-10-29 | 山东大学 | Aluminum-based composite material and preparation method thereof |
| CN104120310B (en) * | 2014-08-04 | 2016-06-15 | 山东大学 | A kind of aluminum matrix composite and preparation method thereof |
| CN105385902A (en) * | 2015-12-10 | 2016-03-09 | 山东大学 | AIN and AIB2 particle reinforced aluminum matrix composite material and preparation method thereof |
| CN105385902B (en) * | 2015-12-10 | 2017-03-08 | 山东大学 | A kind of AlN and AlB2Particle enhanced aluminum-based composite material and preparation method thereof |
| CN109439948A (en) * | 2018-12-20 | 2019-03-08 | 中国兵器科学研究院宁波分院 | A kind of nanometer fining agent and preparation method thereof for aluminium alloy |
| CN112921226A (en) * | 2021-02-16 | 2021-06-08 | 河南工学院 | Mg-AlN master alloy grain refiner for magnesium-aluminum alloy and preparation method thereof |
| CN112921226B (en) * | 2021-02-16 | 2022-05-17 | 河南工学院 | Mg-AlN master alloy grain refiner for magnesium-aluminum alloy and preparation method thereof |
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Application publication date: 20120125 |