CN1179473A - Process for preparing foam metal aluminium and its alloy - Google Patents

Process for preparing foam metal aluminium and its alloy Download PDF

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Publication number
CN1179473A
CN1179473A CN 96117124 CN96117124A CN1179473A CN 1179473 A CN1179473 A CN 1179473A CN 96117124 CN96117124 CN 96117124 CN 96117124 A CN96117124 A CN 96117124A CN 1179473 A CN1179473 A CN 1179473A
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China
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alloy
aluminium
foam metal
powder
metal aluminium
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CN 96117124
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CN1058057C (en
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韩福生
朱震刚
刘长松
宋文海
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INST OF SOLID PHYSICS CHINESE
Institute of Solid State Physics ISSP of CAS
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INST OF SOLID PHYSICS CHINESE
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Abstract

A process for preparing foamed metal aluminium and its alloy includes such technological steps as smelting aluminium or cast aluminium alloy, cooling to 660-675 deg.C, addition of foaming agent prepared from fine Al2O3 powder and TiH2 powder, stirring at 500-1500 rpm for 25-40 seconds, keeping the temp at 650-680 deg. C for 100-300 seconds, and cooling to obtain foamed metal aluminium and its alloy with uniformly distributed porous diameters.

Description

The preparation method of foam metal aluminium and alloy thereof
The present invention relates to the preparation of foam metal aluminium and alloy thereof.
Foamed metal is a kind of light porous metal-base composites that comprises a large amount of bubbles in metallic matrix, it is the characteristic of external phase metal, as the intensity height, the characteristic of high temperature resistant grade and disperse phase (or external phase) air, as damping and amortization, sound deadening shock absorptions etc. organically combine, and have formed the type material that a kind of function and structure develop simultaneously.Foamed metal is at sound deadening shock absorption, catalytic carrier, and electromagnetic shielding, there is wide application prospect in fields such as energy-absorbing buffering.
Make in all multi-methods of foamed metal, foam melt method is simple because of having technology, is convenient to make special-shaped and large-scale component and having practical value most.The preparation technology of foam melt method is: will treat foaming metal or alloy melting and in the proper temperature insulation, add tackifier N 2, Ar, O2, MnO 2Or Ca etc., stir tackify, add blowing agent H fH again 2, TiH 2Or ZrH 2Deng, stirring, foaming promptly obtains foamed metal after the cooling.
Structural and the functional homogeneity that depends on pore space structure to a great extent of foamed metal, therefore obtaining the uniform foamed metal of pore space structure is the focus of people's research in recent years.And to make pore space structure even, and must make bubble even, that is to say whipping agent is evenly distributed in melt.People mainly adopt two kinds of technical schemes at present:
First kind is: tackify+high-speed stirring, and the strict control melt viscosity of this method, because viscosity is low excessively, the effusion of gas increases, and bubble is partly assembled and is formed hole not of uniform size; And viscosity is too high, and then whipping agent is difficult to homodisperse in melt, in addition, because of stirring velocity very high (6000～10000rpm), so whipping appts is had very high requirement, particularly agitator blades, very high wear-resisting, anti-corrosion and thermotolerance be arranged.
Second kind is: adopt special casting mold, the melt that is about in the crucible stirs with whipping agent earlier, is poured into then in another casting mold that has sealing cover and foams, and utilizes air bubble expansion to make each bubble inner pressure power equilibrium, forms hole of uniform size at last.This method complexity that operates, also strict to melt viscosity control, viscosity is low excessively, and gas is easily overflowed, and viscosity is too high, then is difficult to cast.
Used whipping agent all is TiH in above-mentioned two kinds of methods 2Deng metal hydride, this type hydrogenation thing is promptly beginning branch liberation hydrogen more than 500 ℃, and hydrogen discharging speed is very fast, in order to reduce scattering and disappearing of hydrogen, conventional way is to improve melt viscosity or shorten churning time, is difficult for accomplishing and stir at short notice, therefore, make the whipping agent homogenizing very difficult.In a word, up to the present, prepare the uniform foam metal aluminium of pore space structure, be still a problem that urgency is to be solved.
The object of the invention provides a kind of simple, can realize that pore size is controlled, the preparation method of uniform foam metal aluminium in aperture and alloy thereof.
The characteristics of the inventive method are to prepare whipping agent earlier, and then prepare foam metal aluminium and alloy thereof with foam melt method.
Be described in detail the inventive method below.
The inventive method is at first to use Al 2O 3Fine powder, granularity 2～5um is with TiH 2Powder, granularity 20～40um ground and mixed, Al 2O 3Fine powder and TiH 2The ratio of powder is (0.5～2.5): (0.5～2.0), during mixing, TiH 2Particle surface is by Al 2O 3Coat, it is stand-by to be prepared into whipping agent.
Use commercial-purity aluminium (Al) or cast aluminium alloy in 690～710 ℃ of fusings again, be cooled to 660～675 ℃, add the whipping agent for preparing, speed with 500～1500rpm stirs 25～40s, at 650～680 ℃ of insulation 100～300s, from stove, take out postcooling, can obtain the foam metal aluminium and the alloy thereof of even aperture distribution.
Advantage of the present invention is:
1. reduced TiH 2The surface tension of powder, diplomatic corps's dimerization tendency obviously weakens;
2. make TiH 2Release hydrogen and obviously lag behind, release hydrogen peak temperature and increase to 705 ℃ by 655 ℃, hydrogen diffusion coefficient (550 ℃) is by 7.2 * 10 -13m 2/ s reduces to 2.1 * 10 -13m 2/ s so just can add whipping agent under lower viscosity, thereby is easy to realize the whipping agent homogenizing;
3.Al 2O 3Also have viscosifying action, can make tackify and uniform in foamingization synchronously or lag behind and carry out, can prevent escaping of gas effectively;
4. can adjust the viscosity of melt by the churning time of adjusting the whipping agent homogenizing, to reach the size in control aperture, so that obtain controllable aperture, foam metal aluminium that is evenly distributed and alloy thereof.
Embodiment:
1. in crucible, be warming up to 680～700 ℃ of fusings with commercial-purity aluminium (Al), be cooled to 660～680 ℃, add whipping agent Al 2O 3: TiH 2=(0.8～1.2): 1, the speed stirring 30s with 500～800rpm at 660～675 ℃ of insulation 120s, takes out postcooling from stove, and the porosity that obtains foamed aluminium is 84%, and the aperture is 3.1mm.
2. use cast aluminium alloy (ZL301) 680～700 ℃ of fusings, be cooled to 650～680 ℃ again, add aluminium bits (ZL301) and account for 40～70% of gross weight, the speed stirring 30s with 500～800rpm adds whipping agent Al again 2O 3: TiH 2=(0.5～1.0): 1, the speed stirring 40s with 1500～2300rpm at 650～675 ℃ of insulation 120s, takes out postcooling from stove, and the porosity that obtains foamed aluminium is 72%, and the aperture is 2.6mm.
Can prove further that by embodiment 1,2 the present invention can adjust the viscosity of melt by the churning time of adjusting the whipping agent homogenizing, thereby can control the size in aperture, obtains controllable aperture, foam metal aluminium that is evenly distributed and alloy thereof.

Claims (3)

1. one kind prepares the method for foam metal aluminium and alloy thereof with foam melt method, it is characterized in that, 690～710 ℃ of fusings, is cooled to 660～675 ℃ with commercial-purity aluminium again, adds and uses Al 2O 3Fine powder and TiH 2Behind the whipping agent that the powder ground and mixed is made, the speed stirring 25～40s with 500～1500rpm at 650～680 ℃ of insulation 100～300s, takes out postcooling from stove, obtain the foam metal aluminium and the alloy thereof of even aperture distribution.
2. the method for claim 1 is characterized in that preparing the used Al of whipping agent 2O 3The granularity of fine powder is 2～5um, TiH 2The granularity of powder is 20～40um; Al 2O 3Fine powder and TiH 2The ratio of powder is (0.5～2.5): (0.5～2.0).
3. the method for claim 1 is characterized in that, can also make raw material with cast aluminium alloy (ZL), the preparation foam metal aluminium.
CN96117124A 1996-10-10 1996-10-10 Process for preparing foam metal aluminium and its alloy Expired - Fee Related CN1058057C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN96117124A CN1058057C (en) 1996-10-10 1996-10-10 Process for preparing foam metal aluminium and its alloy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN96117124A CN1058057C (en) 1996-10-10 1996-10-10 Process for preparing foam metal aluminium and its alloy

Publications (2)

Publication Number Publication Date
CN1179473A true CN1179473A (en) 1998-04-22
CN1058057C CN1058057C (en) 2000-11-01

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1669688B (en) * 2002-11-26 2010-05-12 昆明理工大学 Continuous production method for foamed metal casting and rolling
CN101586199B (en) * 2008-05-21 2010-12-15 康志勇 Method for preparing large foamed aluminum plate by an internal stress free cooling method
RU2444417C1 (en) * 2010-08-11 2012-03-10 Владимир Сергеевич Колеров Method of producing article from foamed aluminium-based composite material
CN102373345A (en) * 2011-08-30 2012-03-14 吴江市精工铝字制造厂 Foaming agent for foam aluminum and preparation method thereof
CN103451492A (en) * 2013-09-06 2013-12-18 丹阳市国美汽配有限公司 Foamed aluminum material for vehicle bumper and preparation method thereof
CN103589940A (en) * 2013-10-30 2014-02-19 吴江市液铸液压件铸造有限公司 Casting method of thin-wall nodular cast iron
CN104148648A (en) * 2014-08-20 2014-11-19 西北有色金属研究院 Method for manufacturing foam stainless steel composite tube
CN104278296A (en) * 2013-07-12 2015-01-14 原子能与替代能源委员会 Method of synthesizing a metal foam, metal foam, uses thereof and device comprising such a metal foam
CN104611603A (en) * 2014-11-17 2015-05-13 界首市一鸣新材料科技有限公司 Improved technology for production of foamed aluminum based on melt foaming method
CN106222470A (en) * 2016-09-14 2016-12-14 郑州峰泰纳米材料有限公司 A kind of preparation method of foam aluminium alloy
RU2618299C1 (en) * 2015-11-13 2017-05-03 Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский технологический университет "МИСиС" Method of obtaining a precursor for the manufacture of clad foam aluminium
CN107398557A (en) * 2017-06-14 2017-11-28 清华大学 Composite foamable agent particle and preparation method thereof, and the preparation method of foamed aluminium
CN109763012A (en) * 2019-01-22 2019-05-17 山东理工大学 The preparation method of flux foaming enhancing foamed aluminium composite foamable agent
CN112126825A (en) * 2020-08-10 2020-12-25 宁波悦威液压科技有限公司 Hydraulic cylinder silencer and manufacturing process thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3379517A (en) * 1965-10-23 1968-04-23 Lor Corp Method of making metal foam

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1669688B (en) * 2002-11-26 2010-05-12 昆明理工大学 Continuous production method for foamed metal casting and rolling
CN101586199B (en) * 2008-05-21 2010-12-15 康志勇 Method for preparing large foamed aluminum plate by an internal stress free cooling method
RU2444417C1 (en) * 2010-08-11 2012-03-10 Владимир Сергеевич Колеров Method of producing article from foamed aluminium-based composite material
CN102373345A (en) * 2011-08-30 2012-03-14 吴江市精工铝字制造厂 Foaming agent for foam aluminum and preparation method thereof
CN104278296B (en) * 2013-07-12 2018-02-16 原子能与替代能源委员会 Synthesize method, metal foam, its purposes and the device comprising the metal foam of metal foam
CN104278296A (en) * 2013-07-12 2015-01-14 原子能与替代能源委员会 Method of synthesizing a metal foam, metal foam, uses thereof and device comprising such a metal foam
CN103451492A (en) * 2013-09-06 2013-12-18 丹阳市国美汽配有限公司 Foamed aluminum material for vehicle bumper and preparation method thereof
CN103589940A (en) * 2013-10-30 2014-02-19 吴江市液铸液压件铸造有限公司 Casting method of thin-wall nodular cast iron
CN103589940B (en) * 2013-10-30 2016-03-23 吴江市液铸液压件铸造有限公司 A kind of castmethod of thin-wall nodular cast iron
CN104148648A (en) * 2014-08-20 2014-11-19 西北有色金属研究院 Method for manufacturing foam stainless steel composite tube
CN104611603A (en) * 2014-11-17 2015-05-13 界首市一鸣新材料科技有限公司 Improved technology for production of foamed aluminum based on melt foaming method
CN104611603B (en) * 2014-11-17 2017-03-01 界首市一鸣新材料科技有限公司 A kind of modified technique producing foamed aluminium based on foam melt method
RU2618299C1 (en) * 2015-11-13 2017-05-03 Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский технологический университет "МИСиС" Method of obtaining a precursor for the manufacture of clad foam aluminium
CN106222470A (en) * 2016-09-14 2016-12-14 郑州峰泰纳米材料有限公司 A kind of preparation method of foam aluminium alloy
CN107398557A (en) * 2017-06-14 2017-11-28 清华大学 Composite foamable agent particle and preparation method thereof, and the preparation method of foamed aluminium
CN107398557B (en) * 2017-06-14 2019-07-09 清华大学 The preparation method of composite foamable agent particle and preparation method thereof and foamed aluminium
CN109763012A (en) * 2019-01-22 2019-05-17 山东理工大学 The preparation method of flux foaming enhancing foamed aluminium composite foamable agent
CN112126825A (en) * 2020-08-10 2020-12-25 宁波悦威液压科技有限公司 Hydraulic cylinder silencer and manufacturing process thereof

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