CN101347853A - Method for welding foamed aluminium and aluminium alloy using solder capable of foaming - Google Patents
Method for welding foamed aluminium and aluminium alloy using solder capable of foaming Download PDFInfo
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- CN101347853A CN101347853A CNA2008101246821A CN200810124682A CN101347853A CN 101347853 A CN101347853 A CN 101347853A CN A2008101246821 A CNA2008101246821 A CN A2008101246821A CN 200810124682 A CN200810124682 A CN 200810124682A CN 101347853 A CN101347853 A CN 101347853A
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Abstract
The invention discloses a welding method for welding foamed aluminium and aluminium alloy by using foaming solder, which belongs to the welding field of foamed metal. The steps are that 1. spherical pore foamed aluminium alloy blank is prepared as foaming welding solder by the melt foaming process; 2. the foamed aluminium and the aluminium alloy to be weld are selected and manufactured into the material with suitable size, then purified and dried; 3 a steel sealed mould is designed according to the outline dimension of the foamed aluminium and the aluminium alloy to be weld; 4. the solder with the thickness of 3 to 10mm is cut, as well as put and fixed in the solder together with the foamed aluminium and aluminium alloy joint into the sealed mould, and 0.5 to 4 Mpa of pressure is applied on both ends; 5. the solder in the foaming solder layer between the foamed aluminium and the aluminium alloy in the sealed mould is heated, and the second foaming procedure is started, the solder and base metal are infiltrated and diffused, and connected with each other by occlusal holes; 6. the steel mould is demolished and the overflow foaming solder is cleaned, and a welded framing member of the foamed aluminium and the aluminium alloy is obtained.
Description
Technical field
The present invention relates to the welding field of foamed aluminium and aluminium alloy, particularly adopt a kind of solder capable of foaming to carry out the method for foamed aluminium and aluminium alloy welding.
Background technology
Foamed aluminium is to be matrix with the aluminum or aluminum alloy, comprises a kind of novel ultra-light type porous metals of a large amount of holes, and structure (aperture, porosity, matrix alloy) is adjustable, and the closed-cell aluminum foam porosity can change very on a large scale at 50%-95%.Have outstanding properties such as lightweight ρ＜1, high specific strength, high damping and high-energy absorption, possess simultaneously multifrequency natures such as sound insulation, heat insulation, fire-retardant, damping, impact energy absorption and electromagnetic shielding again, realized the lightweight multifunction of structural material, thereby be with a wide range of applications.In high-tech sectors such as space flight and aviation, high porosity foamed aluminium and alloy have become the forward position focus of international material research as super light material especially.Increasingly extensive along with what use, the interconnection technique of foamed aluminium and aluminium alloy particularly solder technology importance highlights.The foam metal that with the hole is feature adopts conventional welding method to be difficult to finish connection, therefore must develop new process and weld.
Summary of the invention
Shortcoming at the method for existing welding foamed aluminium and aluminium alloy exists the invention discloses a kind of method that adopts solder capable of foaming welding foamed aluminium and aluminium alloy, this method can weld can not second time of foaming various foamed aluminiums and aluminium alloy, weld strength is good.
Technical scheme of the present invention is:
A kind of method that adopts solder capable of foaming welding foamed aluminium and aluminium alloy, step is: the first step: the preparation solder capable of foaming: will be equivalent to 0.2～9% calcium of aluminium alloy weight and 1～6% hydride powder and mix and stir to make and mix the tackifying foaming agent, aluminium alloy is heated to fusing fully, to mix the tackifying foaming agent again and add the tackifying foaming that under 600～1200rpm, carries out 6～15min in 670～720 ℃ of aluminium alloy melts by paddle, and undecomposed hydride powder is evenly distributed in the melt, it is carried out water-cooled, be cooled to room temperature in the 40s, obtaining porosity is 35～70%, the mass fraction of undecomposed titantium hydride is 0.1～1.0% solder capable of foaming.The aluminium alloy that described solder capable of foaming adopts is a kind of in alusil alloy, aluminium copper, almag, the alumin(i)um zinc alloy.
Second step: with foamed aluminium to be welded and aluminium alloy, being processed as needs size and cleans oven dry; Foamed aluminium to be welded reaches and aluminum alloy surface is cleaned with kerosene earlier, is 20～40%HNO with mass concentration again after washing then
3Solution cleans, and water purification is cleaned then, cleans oven dry after drying again with acetone.The composition of foamed aluminium to be welded and aluminium alloy is one or several in fine aluminium, alusil alloy, aluminium copper, almag, the alumin(i)um zinc alloy.
The 3rd step: make the steel sealed mold according to the appearance and size of foamed aluminium to be welded and aluminium alloy, guaranteeing can complete airtight coating solder capable of foaming and foamed aluminium to be welded and aluminum alloy joint part;
The 4th step: cut lengths are that solder capable of foaming and the foamed aluminium to be welded of 3～10mm thickness and aluminum alloy joint are inserted in the sealed mold and fixed, and apply the pressure of 0.5～4Mpa at two ends;
The 5th step: adopting oxy-acetylene or liquefied petroleum gas Flame Heating Temperature is 700～900 ℃, solder capable of foaming layer 2～4min in the heated sealant mould between foamed aluminium and alloy, when becoming semisolid, sprawls gradually solder, begin second time of foaming simultaneously, solder soaks into diffusion mutually with mother metal and realizes being connected by the hole of mutual interlock.When overflowing, solder stops heating.
The 6th step: the solder capable of foaming removing of removing steel die and will overflow obtains foamed aluminium and alloy welding structural element.
Beneficial effect of the present invention is:
1. the present invention adopts the method for tackifying foaming agent to prepare solder capable of foaming, calcium and hydride powder is mixed and stirs make the tackifying foaming agent, because that aluminium alloy melt does not increase in advance is glutinous, titanium hydride powders very easily evenly disperses in 670～720 ℃ of melts.Adopt suitable technological parameter: carry out the tackifying foaming of 6～15min under 600～1200rpm, both guaranteed to have suitable viscosity to prevent that titantium hydride from sinking down into the bottom, can guarantee that again hydride powder is dispersed in the aluminium alloy melt, form solder capable of foaming.
2. the present invention adopts the method for tackifying foaming agent to prepare solder capable of foaming, simplified processing step, to increase glutinous and foaming is finished synchronously by once stirring, and that existing flux foaming technology will adopt low speed to increase is glutinous, two steps of high-speed stirred foaming, the preparation solder capable of foaming time can be shortened simultaneously, reduce cost.
3. but employing solder composition of the present invention is an aluminium alloy, and is identical with the body composition or close, and the soldering maximum temperature is 870 ℃, so brazed seam can withstand higher temperatures.Compare with bonding connection of routine, have resistant to elevated temperatures advantage with low temperature brazing.
4. the present invention adopts solder capable of foaming, can make the abundant secondary foamization of solder by adjusting flame status, utilize the fusing of solder to sprawl, final cooling is solidified solder capable of foaming between foamed aluminium and aluminium alloy, thereby has realized the metallurgical binding between foamed aluminium and the aluminium alloy.
5. the present invention adopts solder capable of foaming to carry out the welding of foamed aluminium and aluminium alloy, the weld seam that forms has pore structure equally, the uniformity that has kept foamed aluminium and aluminium alloy loose structure, do not form other welding methods and connect the different-thickness boundary layer that causes, to the foam aluminium alloy conduction, performance impacts such as heat transfer are less.
6. adopt method of the present invention to weld and have different porosities, the foamed aluminium in gradient porosity or different apertures and aluminium alloy.
7. the present invention is owing to realized the metallurgical, bond of foamed aluminium and aluminium alloy, brazed seam chemical property and foamed aluminium body are very close, and the brazed seam width can be adjusted arbitrarily according to actual needs, and the surface still can form dense oxidation film under high temperature action, therefore have corrosion-resistant, the characteristics that oil resistant soaks.
8. the present invention is intermetallic joint, compares with bonding, does not have the problem of aging under the space ray condition such as ultraviolet ray, connects reliably, can directly apply to working environment.
9. welding procedure of the present invention is simple, cost is low, realizes automation, efficient height easily.
Description of drawings
The schematic diagram that Fig. 1 has carried out welding for the employing solder capable of foaming of ultralight foamed aluminium and aluminium alloy, wherein 1 is solder capable of foaming, and 2 is foamed aluminium to be welded, and 3 is steel die.
Fig. 2 is the mechanical connection manner of weldment.
Fig. 3 is the diffusion connected mode of weldment.
Fig. 4 is the welding point under the X-CT observation, and joint does not have obvious transition interface as seen from the figure.
Fig. 5 is the tensile strength contrast of different porosities weldment and body
The specific embodiment
Inventive principle:
The present invention utilizes the undecomposed TiH that contains in the solder capable of foaming
2Secondary decomposes the generation driving force in the heating welding process, finishes welding by the acting in conjunction of solid, liquid, gas three-phase.
Foamed aluminium and aluminium alloy welding interfacial reaction layer bonding mechanism: the 1. mutual mechanical connection of foam aluminum or aluminum alloy.As shown in Figure 2, because the special pore space structure in foam metal material interface, in the second time of foaming process, foam at the interface moves under the effect of extruding, and cell wall is out of shape, motion is overlapped, shows as the mechanical connection manner of mutual interlock fast after the cooling.2. the mutual diffusion dissolution of foam aluminium alloy connects.In the foam aluminum or aluminum alloy second time of foaming process, by solid, liquid, the compound action of gas three-phase, contain the semisolid aluminum or aluminum alloy volumetric expansion of a large amount of unordered bubbles, solder begins fully to contact with foamed aluminium or alloy under limited confined space squeezing action, the metallurgical binding at interface is to realize by the Physical Metallurgy process that the local melting of solid on the boundary layer and atom spread, because foamed aluminium or aluminum alloy blank belong to acieral, only need the High temperature diffusion of short period just can carry out fully wettingly sprawling rapidly in foam aluminium alloy blank contact surface both sides, as shown in Figure 3, along with the second time of foaming time increases, the diffusion fusion is more obvious.
As shown in Figure 4, along with the carrying out of insulation, being connected mutually of interface hole, the convection current of liquid phase, migration impel the welding region composition to continue homogenising, form the foam aluminium alloy solder bond part of no sharp interface after the Quench.By the room temperature tensile strength of test weldment on the CMT5105 electronic universal tester, rate of extension 0.5mm/s, 20 ℃ of room temperatures.As shown in Figure 5, the result shows foam aluminium alloy interfacial weld intensity ideal, and along with the rising of porosity more near body intensity, when the weldment porosity was 75.3%, strength of joint reached 81% of body intensity.
Realization of the present invention is: a kind of method that adopts solder capable of foaming welding foamed aluminium and aluminium alloy, step is: the first step: the preparation solder capable of foaming: will be equivalent to 0.2～9% calcium of aluminium alloy weight and 1～6% hydride powder and mix and stir to make and mix the tackifying foaming agent, aluminium alloy is heated to fusing fully, to mix the tackifying foaming agent again and add the tackifying foaming that under 600～1200rpm, carries out 6～15min in 670～720 ℃ of aluminium alloy melts by paddle, and undecomposed hydride powder is evenly distributed in the melt, it is carried out water-cooled, be cooled to room temperature in the 40s, obtaining porosity is 35～70%, the mass fraction of undecomposed titantium hydride is 0.1～1.0% solder capable of foaming.The aluminium alloy that described solder capable of foaming adopts is a kind of in alusil alloy, aluminium copper, almag, the alumin(i)um zinc alloy.
Second step: with foamed aluminium to be welded and aluminium alloy, being processed as needs size and cleans oven dry; Foamed aluminium to be welded reaches and aluminum alloy surface is cleaned with kerosene earlier, is 20～40%HNO with mass concentration again after washing then
3Solution cleans, and water purification is cleaned then, cleans oven dry after drying again with acetone.The composition of foamed aluminium to be welded and aluminium alloy is one or several in fine aluminium, alusil alloy, aluminium copper, almag, the alumin(i)um zinc alloy.
The 3rd step: make the steel sealed mold according to the appearance and size of foamed aluminium to be welded and aluminium alloy, as shown in Figure 1, guarantee steel die 3 can be fully can complete airtight coating solder capable of foaming 1 and the blank area of foam aluminum or aluminum alloy 2 to be welded;
The 4th step: cut lengths are that solder capable of foaming and the foamed aluminium to be welded of 3～10mm thickness and aluminum alloy joint are inserted in the sealed mold and fixed, and apply the pressure of 0.5～4Mpa at two ends;
The 5th step: adopting oxy-acetylene or liquefied petroleum gas Flame Heating Temperature is 700～900 ℃, solder capable of foaming layer 2～4min in the heated sealant mould between foamed aluminium and alloy, when becoming semisolid, sprawls gradually solder, begin second time of foaming simultaneously, solder soaks into diffusion mutually with mother metal and realizes being connected by the hole of mutual interlock.When overflowing, solder stops heating.
The 6th step: the solder capable of foaming removing of removing steel die and will overflow obtains foamed aluminium and alloy welding structural element.
The welding of 1 one kinds of foam fine aluminiums of embodiment
The first step: will be equivalent to 0.2% calcium of alusil alloy weight and 1% hydride powder and mix and stir to make and mix the tackifying foaming agent, aluminium alloy is heated to fusing fully, to mix the tackifying foaming agent again and add the tackifying foaming that under 600rpm, carries out 6min in 670 ℃ of alusil alloy melts by paddle, and undecomposed hydride powder is evenly distributed in the melt, it is carried out water-cooled, be cooled to room temperature in the 40s, obtain porosity and be 35～70%, the mass fraction of undecomposed titantium hydride is 0.1% solder capable of foaming.
Second step: adopting the line cutting is 67.8% with porosity, and the aperture is the foamed aluminium of the 2.1mm foamed aluminium pole that to process two diameters be 6cm, its surface is cleaned with kerosene earlier, and be 20% HNO again with mass concentration after washing then
3Solution cleans, and water purification is cleaned then, cleans oven dry after drying again with acetone;
The 3rd step: the processing internal diameter is 6cm, and length is the steel sleeve of 4cm,
The 4th step: the solder capable of foaming for preparing is cut into diameter 6cm, and thickness is the disk shape of 5mm; Insert the solder capable of foaming of well cutting between the foamed aluminium pole joint to be welded and fix and apply the pressure of 0.5Mpa with sleeve seal at two ends;
The 5th step: adopt the leading edge of foamed aluminium to be welded in oxy-acetylene or the liquefied petroleum gas flame heat sleeve and the solder layer between the foamed aluminium pole, when the temperature of solder reaches 700～900 ℃, when becoming semisolid, sprawls gradually solder, begin second time of foaming simultaneously, solder soaks into diffusion mutually with mother metal and realizes being connected by the hole of mutual interlock.Stop heating when solder overflows, whole process is about 2～4min.
The 6th step: during the foam aluminium bar that step 5 is welded was got from steel sleeve, cutting was at last removed the solder capable of foaming that overflows and is then finished the welding of foamed aluminium pole.
The welding of 2 one kinds of foamed aluminosilicate alloys of embodiment
The first step: will be equivalent to 9% calcium of alusil alloy weight and 6% hydride powder and mix and stir to make and mix the tackifying foaming agent, aluminium alloy is heated to fusing fully, to mix the tackifying foaming agent again and add the tackifying foaming that under 1200rpm, carries out 15min in 720 ℃ of aluminium copper melts by paddle, and undecomposed hydride powder is evenly distributed in the melt, it is carried out water-cooled, be cooled to room temperature in the 40s, obtain porosity and be 35～70%, the mass fraction of undecomposed titantium hydride is 1% solder capable of foaming.
Second step: adopting the line cutting is 77.6% with porosity, and the aperture is two foamed aluminosilicate alloy cuboids that the cross section is 5 * 5cm of foamed aluminosilicate alloy processing of 2.5mm, its surface is cleaned with kerosene earlier, and be 40%HNO with mass concentration again after washing then
3Solution cleans, and water purification is cleaned then, cleans oven dry after drying again with acetone;
The 3rd step: the cross section is 5 * 5cm in the processing, and length is the steel sleeve of 4cm,
The 4th step: it is 5 * 5cm that the solder capable of foaming for preparing is cut into the cross section, and thickness is the blockage shape of 6mm; Insert the solder capable of foaming of well cutting between the foamed aluminosilicate alloy joint to be welded and fix and apply the pressure of 4Mpa with sleeve seal at two ends;
The 5th step: adopt the leading edge of foamed aluminosilicate alloy to be welded in oxy-acetylene or the liquefied petroleum gas flame heat sleeve and the solder layer between foamed aluminosilicate alloy, when the temperature of solder reaches 700～900 ℃, solder begins second time of foaming and fusing is sprawled, and solder soaks into diffusion mutually with mother metal and realizes being connected by the hole of mutual interlock.Stop heating when solder overflows, whole process is about 2～4min.
The 6th step: during the foamed aluminosilicate alloy that step 5 is welded was got from steel sleeve, the welding that the solder capable of foaming that overflows is then finished foamed aluminosilicate alloy was removed in cutting at last.
The welding of 3 one kinds of foamed aluminium magnesium alloy plates of embodiment
The first step: will be equivalent to 3.2% calcium of alumin(i)um zinc alloy weight and 3% hydride powder and mix and stir to make and mix the tackifying foaming agent, aluminium alloy is heated to fusing fully, to mix the tackifying foaming agent again and add the tackifying foaming that under 1000rpm, carries out 10min in 700 ℃ of alusil alloy melts by paddle, and undecomposed hydride powder is evenly distributed in the melt, it is carried out water-cooled, be cooled to room temperature in the 40s, obtain porosity and be 35～70%, the mass fraction of undecomposed titantium hydride is 0.6% solder capable of foaming.
Second step: adopting the line cutting is 80.7% with porosity, and the aperture is two foamed aluminium magnesium alloy plates that the cross section is 3 * 20cm of foamed aluminium magnesium alloy processing of 2.9mm, its surface is cleaned with kerosene earlier, and be 20～40%HNO with mass concentration again after washing then
3Solution cleans, and water purification is cleaned then, cleans oven dry after drying again with acetone;
The 3rd step: the cross section is 3 * 20cm in the processing, and length is the steel sleeve of 4cm
The 4th step: it is 3 * 20cm that the solder capable of foaming for preparing is cut into the cross section, and thickness is the rectangular bulk of 10mm; , the 2Mpa pressure of the solder capable of foaming of well cutting being inserted between the foamed aluminium magnesium alloy plate joint to be welded and fixing and applying with sleeve seal at two ends;
The 5th step: adopt the leading edge of foamed aluminium magnesium alloy plate to be welded in oxy-acetylene or the liquefied petroleum gas flame heat sleeve and the solder layer between the foamed aluminium magnesium alloy plate, when the temperature of solder reaches 770 ℃, solder begins to foam and melts and sprawls that solder and mother metal soak into diffusion mutually and the hole realization by mutual interlock is connected.Stop heating when solder overflows, whole process is about 2～4min.
The 6th step: during the foam aluminium alloy plate that step 5 is welded was got from steel sleeve, the welding that the solder capable of foaming that overflows is then finished the foamed aluminium magnesium alloy plate was removed in cutting at last.
The welding of 4 one kinds of gradient porosity foamed aluminiums of embodiment
The first step: will be equivalent to 0.2% calcium of aluminium copper weight and 1% hydride powder and mix and stir to make and mix the tackifying foaming agent, aluminium alloy is heated to fusing fully, to mix the tackifying foaming agent again and add the tackifying foaming that under 600rpm, carries out 6min in 670 ℃ of alusil alloy melts by paddle, and undecomposed hydride powder is evenly distributed in the melt, it is carried out water-cooled, be cooled to room temperature in the 40s, obtain porosity and be 35～70%, the mass fraction of undecomposed titantium hydride is 0.1% solder capable of foaming.
Second step: adopt the line cutting with mean porosities 78.7%, the aperture is that two diameters of gradient porosity foamed aluminium processing of 2.4mm are 35cm, length is the foam aluminium alloy pole of 10cm, its surface cleaned with kerosene earlier, and be 20～40%HNO with mass concentration again after washing then
3Solution cleans, and water purification is cleaned then, cleans oven dry after drying again with acetone;
The 3rd step: the processing internal diameter is 35cm, and length is the steel sleeve of 4cm,
The 4th step: with the solder capable of foaming cutting diameter for preparing is 35cm, and thickness is the disk shape of 6mm; Insert the solder capable of foaming of well cutting between the foam aluminium alloy plate joint to be welded and fix and apply the pressure of 4Mp with sleeve seal at two ends;
The 5th step: adopt the leading edge of foamed aluminium pole to be welded in oxy-acetylene or the liquefied petroleum gas flame heat sleeve and the solder capable of foaming layer between foamed aluminium, when the temperature of solder reaches 700～900 ℃, solder begins foaming and fusing is sprawled until welding fully;
The 6th step: during the foam aluminium alloy plate that step 5 is welded was got from steel sleeve, the welding that the solder capable of foaming that overflows is then finished the foam aluminium alloy plate was removed in cutting at last.
The welding of 5 one kinds of different aperture foamed aluminiums of embodiment and alloy
The first step: will be equivalent to 0.2% calcium of aluminium copper weight and 1% hydride powder and mix and stir to make and mix the tackifying foaming agent, aluminium alloy is heated to fusing fully, to mix the tackifying foaming agent again and add the tackifying foaming that under 600rpm, carries out 6min in 670 ℃ of aluminium copper melts by paddle, and undecomposed hydride powder is evenly distributed in the melt, it is carried out water-cooled, be cooled to room temperature in the 40s, obtain porosity and be 35～70%, the mass fraction of undecomposed titantium hydride is 0.1% solder capable of foaming;
Second step: adopting linear cutting equipment is 67.8% with porosity respectively, the aperture is that foamed aluminium and the porosity of 2.1mm is 76.9%, the aperture is that the foamed aluminium copper alloy of 2.4mm is processed into foamed aluminium and the alloy pole that diameter is 6cm, its surface is cleaned with kerosene earlier, is 20% HNO again with mass concentration after washing then
3Solution cleans, and water purification is cleaned then, cleans oven dry after drying again with acetone;
The 3rd step: the processing internal diameter is 6cm, and length is the steel sleeve of 4cm;
The 4th step: the solder capable of foaming for preparing is cut into diameter 6cm, and thickness is the disk shape of 5mm; Insert the solder capable of foaming of well cutting between foamed aluminium to be welded and the foam aluminium alloy pole joint and fix and apply the pressure of 0.5Mpa with sleeve seal at two ends;
The 5th step: adopt foamed aluminium to be welded and the leading edge of alloy and the solder layer between the foamed aluminium pole in oxy-acetylene or the liquefied petroleum gas flame heat sleeve, when the temperature of solder reaches 700～900 ℃, when becoming semisolid, sprawls gradually solder, begin second time of foaming simultaneously, solder soaks into diffusion mutually with mother metal and realizes being connected by the hole of mutual interlock.Stop heating when solder overflows, whole process is about 2～4min;
The 6th step: during foamed aluminium that step 5 is welded and alloy bar were got from steel sleeve, cutting was at last removed the solder capable of foaming that overflows and is then finished different porosities, different aperture and different aluminum matrix foamed aluminium and the welding of alloy pole.
Claims (5)
1. method that adopts solder capable of foaming welding foamed aluminium and aluminium alloy is characterized in that step is:
The first step: preparation solder capable of foaming: by foam melt method prepare that porosity is 35～70%, the mass fraction of undecomposed titantium hydride is that 0.1～1.0% spherical pore foam aluminium alloy blank is as solder capable of foaming;
Second step: will foamed aluminium to be welded and aluminium alloy be processed as and need size and clean to dry;
The 3rd step: the appearance and size according to foamed aluminium to be welded and aluminium alloy is made the steel sealed mold;
The 4th step: cut lengths are that the solder capable of foaming of 3～10mm thickness and foamed aluminium to be welded and aluminum alloy joint are inserted in the sealed mold, fixedly the steel sealed mold wraps up solder capable of foaming and foamed aluminium to be welded and aluminum alloy joint, and applies the pressure of 0.5～4Mpa at two ends;
The 5th step: the solder capable of foaming layer 2～4min in 700～900 ℃ of following heated sealant moulds between foamed aluminium and alloy overflows from die gap until liquid solder capable of foaming, and welding finishes;
The 6th step: the solder capable of foaming removing of removing the steel sealed mold and will overflow obtains foamed aluminium and aluminium alloy welding structural element.
2. the method for employing solder capable of foaming welding foamed aluminium according to claim 1 and aluminium alloy, the step that it is characterized in that described preparation solder capable of foaming is: will be equivalent to 0.2～9% calcium of aluminium alloy weight and 1～6% hydride powder and mix and stir to make and mix the tackifying foaming agent, aluminium alloy is heated to fusing fully, to mix again in 670～720 ℃ of aluminum or aluminum alloy melts of tackifying foaming agent adding and under 600～1200rpm, stir the tackifying foaming that carries out 6～15min, and undecomposed hydride powder is evenly distributed in the melt, it is carried out water-cooled, be cooled to room temperature in the 40s, obtaining porosity is 35～70%, the mass fraction of undecomposed titantium hydride is 0.1～1.0% solder capable of foaming.
3. the method for employing solder capable of foaming according to claim 2 welding foamed aluminium and aluminium alloy is characterized in that aluminium alloy that described solder capable of foaming adopts is a kind of in alusil alloy, aluminium copper, almag, the alumin(i)um zinc alloy.
4. the method for employing solder capable of foaming welding foamed aluminium according to claim 1 and aluminium alloy is characterized in that foamed aluminium to be welded reaches and aluminum alloy surface is cleaned with kerosene earlier, is 20～40%HNO with mass concentration again after washing then
3Solution cleans, and water purification is cleaned then, cleans oven dry after drying again with acetone.
5. the method for employing solder capable of foaming welding foamed aluminium according to claim 1 and aluminium alloy, the composition that it is characterized in that foamed aluminium to be welded and aluminium alloy is one or several in fine aluminium, alusil alloy, aluminium copper, almag, the alumin(i)um zinc alloy.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101954540A (en) * | 2010-09-30 | 2011-01-26 | 东北大学 | Method for welding foamed aluminum material by transient liquid phase diffusion |
| CN102002607A (en) * | 2010-12-14 | 2011-04-06 | 东莞理工学院 | Method for preparing foamed aluminum by foaming melt |
| CN102172792A (en) * | 2011-03-04 | 2011-09-07 | 北京科技大学 | Method for preparing structural material of floors and coaches of high-speed trains |
| CN110819931A (en) * | 2019-11-29 | 2020-02-21 | 山东交通学院 | Powder-cored welding wire, preparation method and application thereof, porous coating and preparation method thereof |
| CN113977025A (en) * | 2020-12-04 | 2022-01-28 | 中国电器科学研究院股份有限公司 | Method for preparing large-gap soldered joint |
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2008
- 2008-08-29 CN CN200810124682A patent/CN100584501C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101954540A (en) * | 2010-09-30 | 2011-01-26 | 东北大学 | Method for welding foamed aluminum material by transient liquid phase diffusion |
| CN102002607A (en) * | 2010-12-14 | 2011-04-06 | 东莞理工学院 | Method for preparing foamed aluminum by foaming melt |
| CN102002607B (en) * | 2010-12-14 | 2012-07-18 | 东莞理工学院 | Method for preparing foamed aluminum by foaming melt |
| CN102172792A (en) * | 2011-03-04 | 2011-09-07 | 北京科技大学 | Method for preparing structural material of floors and coaches of high-speed trains |
| CN102172792B (en) * | 2011-03-04 | 2012-12-05 | 北京科技大学 | Method for preparing structural material of floors and coaches of high-speed trains |
| CN110819931A (en) * | 2019-11-29 | 2020-02-21 | 山东交通学院 | Powder-cored welding wire, preparation method and application thereof, porous coating and preparation method thereof |
| CN110819931B (en) * | 2019-11-29 | 2021-10-12 | 山东交通学院 | Powder-cored welding wire, preparation method and application thereof, porous coating and preparation method thereof |
| CN113977025A (en) * | 2020-12-04 | 2022-01-28 | 中国电器科学研究院股份有限公司 | Method for preparing large-gap soldered joint |
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|---|---|
| CN100584501C (en) | 2010-01-27 |
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