CN104625484A - Novel rubidium and cesium brazing flux - Google Patents
Novel rubidium and cesium brazing flux Download PDFInfo
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- CN104625484A CN104625484A CN201410796669.6A CN201410796669A CN104625484A CN 104625484 A CN104625484 A CN 104625484A CN 201410796669 A CN201410796669 A CN 201410796669A CN 104625484 A CN104625484 A CN 104625484A
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/12—Copper or alloys thereof
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Abstract
The invention provides a novel rubidium and cesium brazing flux and belongs to the field of brazing materials for non-metallic materials. The novel rubidium and cesium brazing flux comprise 0.12-0.5 mole of rubidium fluoride (RbF), 0.12-0.5 mole of cesium fluoride (CsF), 0.001-0.2 mole of aluminum oxide (Al2O3), 0.001-0.02 mole of lithium fluoride (LiF), 0.0001-0.02 mole of gallium oxide (Ga2O3) and the balance aluminum fluoride (AlF3). The novel rubidium and cesium brazing flux has the advantages that the brazing requirements of aluminum-copper, aluminum-steel and aluminum-aluminum can be met at the same time, and the activity is high.
Description
Technical field: the brazing material field that the invention belongs to nonmetallic materials class, be specifically related to a kind of can the novel rubidium caesium brazing flux of brazed aluminum-steel, Solder for Al-Cu Joint Welding and aluminium-aluminium.
Background technology: along with the fast development of track traffic, energy industry and Refrigeration Technique, except aluminium-constructed of aluminium adopts in a large number, the application demand of the composite construction of aluminium alloy and copper, aluminium alloy and steel gets more and more, and the structure of Solder for Al-Cu Joint Welding, aluminium-bimetal copper-steel composite is widely used in fields such as hardware, power station, household electrical appliances.But up to now, " connection " problem of aluminium-bimetal copper-steel composite, is still a still unsolved difficult problem.
Through literature search, in published Chinese patent literature, as " New type soldering flux of a kind of stainless steel and aluminium soldering " that CN201310445105.3 recommends, its constituent comprises: ptfe aluminum potassium+potassium hexafluoroaluminate (KAlF
4+ K
3alF
6) eutectic, zinc fluoride (ZnF
2), copper fluoride (CuF
2), tin fluoride (SnF
4).Although this brazing flux is by adding zinc fluoride, copper fluoride and tin fluoride to KAlF
4+ K
3alF
6carry out modification, thus reach can soldering stainless steel and aluminium, but do not provide the solder of this brazing flux institute " coupling " and the mechanical property (such as tensile strength or shearing strength) of soldered fitting in the technological documents such as its description.In addition, also not mentioned in the technological documents such as its description whether can soldering Solder for Al-Cu Joint Welding foreign material, therefore there is many parts that haves much room for improvement in it.CN201410076059.9 discloses the one brazing flux containing caesium rubidium of soldering aluminum steel and aluminum bronze " can ", it is characterized in that by molal quantity proportioning: 0.01 mole of (i.e. mol, lower with) ~ the rubidium fluoride RbF (RbF) of 0.56 mole, the cesium fluoride (CsF) of 0.15 mole ~ 0.58 mole, the aluminium hydroxide (Al (OH) of 0.001 mole ~ 0.25 mole
3), the potassium fluoride (KF) of 0.001 mole ~ 0.2 mole, the gallium fluoride (GaF of 0.002 mole ~ 0.05 mole
3), the lithium fluoride (LiF) of 0.001 mole ~ 0.025 mole, the boron fluoride (BF of 0.001 mole ~ 0.025 mole
3), surplus is aluminum fluoride (AlF
3).Wherein GaF
3with LiF, BF
3between mol ratio be GaF
3: LiF: BF
3=2: 1: 1.But its formula is too complicated, and during production, quality control is comparatively difficult, still needs further improvement.
" soldering " is the welding method with " melting " with marked difference.For the connection of foreign material (namely two kinds different material), soldering has more advantage.During soldering, materials to be welded (i.e. mother metal) is infusible, and that dependence is first melted, lower than materials to be welded fusion temperature liquid solder after soaking, sprawl, flow, cool several step, can couple together mother metal on mother metal.Can therefore, during soldering, whether solder can soak, sprawls, flow on mother metal, be the key issue that realize mother metal " reliably connect ", and therefore, can the effect of brazing flux be the important materials of the reliable connection that realize of the same race or foreign material when soldering.
Existing document shows, the oxide of aluminum alloy surface is mainly Al
2o
3, MgO, MnO, CuO, SiO
2deng, the oxide on steel surface is mainly FeO, Fe
2o
3, NiO, Cr
2o
3deng, the oxide of copper alloy surface is mainly CuO, Cu
2o, ZnO etc.Existing result of study shows, want to adopt a kind of brazing flux remove simultaneously aluminium alloy, steel, copper alloy surface oxide be very difficult.Document shows, the CsAlF developed in recent years
4, KCsAlF
4brazing flux can remove the oxide of aluminium alloy and copper alloy surface well, simultaneously, thus solves the brazing problems of Solder for Al-Cu Joint Welding foreign material, but, still can not remove the oxide on aluminium alloy and steel (or stainless steel) surface simultaneously; " New type soldering flux of a kind of stainless steel and aluminium soldering " that CN201310445105.3 recommends can solve the soldering of aluminium-steel foreign material, but but can not soldering Solder for Al-Cu Joint Welding foreign material; CN201410076059.9 discloses the one brazing flux containing caesium rubidium of soldering aluminum steel and aluminum bronze " can ", but its formula is too complicated, and during production, quality control is comparatively difficult.Therefore, a kind of formula of research and development is relatively simple, be applicable to " Solder for Al-Cu Joint Welding ", the brazing flux of " aluminium-steel " and " aluminium-aluminium " soldering seems particularly urgent, and this invention " a kind of novel rubidium caesium brazing flux ", namely completes under this technical background.
Summary of the invention: the object of this invention is to provide one and can meet " Solder for Al-Cu Joint Welding ", " aluminium-steel " soldering and the brazing requirements of " aluminium-aluminium " structure can be taken into account and there is the novel rubidium caesium brazing flux of " high activity " simultaneously.
Object of the present invention can be realized by following technical proposals, a kind of novel rubidium caesium brazing flux, it is characterized in that, by molal quantity (in a mole), proportioning is formed its component is: the rubidium fluoride RbF (RbF) of 0.12 mole ~ 0.5 mole, the cesium fluoride (CsF) of 0.12 mole ~ 0.5 mole, the aluminium oxide (Al of 0.001 mole ~ 0.2 mole
2o
3), the lithium fluoride (LiF) of 0.001 mole ~ 0.02 mole, the gallium oxide (Ga of 0.0001 mole ~ 0.02 mole
2o
3), surplus is aluminum fluoride (AlF
3).
Effect of the present invention is:
1, " Solder for Al-Cu Joint Welding ", " aluminium-steel " and " aluminium-aluminium " brazing requirements can be met simultaneously and there is high activity, the brazing flux (see Fig. 1 to Fig. 8) of bibliographical information before the spreading property (spreading area) on aluminium alloy, Q235 and 304 stainless steels is better than greatly, this is the CsAlF of the present invention at existing bibliographical information
4(also CsF-AlF can be expressed as
3) brazing flux and CsF-RbF-AlF
3on basis, with the addition of gallium oxide (Ga
2o
3) and aluminium oxide (Al
2o
3) etc. compound, the interpolation of above-mentioned two kinds of compounds, is possessing CsAlF
4and CsF-RbF-AlF
3brazing flux can soldering Solder for Al-Cu Joint Welding, aluminium-steel, aluminium-aluminium ability basis on, be provided with FeO, Fe of more excellent removal aluminium alloy, steel and stainless steel surfaces
2o
3, NiO, Cr
2o
3deng the ability of oxide;
2, preparation technology is simple, and quality controllable, stable performance, uses commercially available rubidium fluoride RbF (RbF), cesium fluoride (CsF), aluminium oxide (Al
2o
3), lithium fluoride (LiF), gallium oxide (Ga
2o
3), aluminum fluoride (AlF
3), according to illustrated proportioning, adopt " physical mixed " mode (or claiming mechanical mixture mode) fully to mix and namely obtain required product.Or " simple chemical synthesis " mode of employing, namely appropriate pure running water (or distilled water, deionized water) is first used in rustless steel container, to dissolve above-claimed cpd (can suitably heat if desired) to transparency liquid, then heating is continued, water is evaporated to crystallization completely, after pulverizing, namely obtains required product.The preparation of brazing flux can also adopt other any synthetic method to carry out, as long as meet composition proportion of the present invention, can reach technique effect of the present invention.Such as: according to ratio requirement of the present invention, according to inorganic chemical " chemical synthesis " general principle, adopt Cs
2cO
3, Rb
2cO
3, Li
2cO
3react with hydrofluoric acid (i.e. HF), preparation CsF, RbF, LiF; Then Al is adopted
2o
3react with hydrofluoric acid (i.e. HF) and prepare AlF
3; In suitable container (such as, hydrofluoric acid needs to use polytetrafluoroethylplastic plastic container), mixing, neutralization (if required), heating, be evaporated to crystallization completely by water, add Ga
2o
3and mix, namely prepare brazing flux of the present invention after pulverizing.Except " synthesis technique " is different, step different except, the brazing flux performance just the same (note 4 see in accompanying drawing 9 comparative example 1 to comparative example 3 and accompanying drawing 9) that the brazing flux performance prepared prepares with " physical mixed " mode or " simple chemical synthesis " mode; In addition, in accompanying drawing 9 listed " brazed seam shear strength test data ", when " 304 corrosion resistant plate+6063 aluminium alloy plate ", " Q235 steel plate+6063 aluminium alloy plate ", " T2 red copper+6063 aluminium alloy plate " three kinds of different materials combination solderings, the result of the test numerical value of embodiment 1 to embodiment 6 and comparative example 1 to comparative example 3, all in " the same level scope " of 110MPa ~ 140MPa, illustrate that " synthetic method " brazing property to brazing flux of the present invention does not have substantial effect.The rubidium caesium brazing flux produced, coordinate the solders such as Zn-Al system, Al-Si-Zn system and Al-Si, when adopting mode of heating brazed aluminum-aluminium same metal material, Solder for Al-Cu Joint Welding foreign material, aluminium-steel foreign material and the aluminium-aluminum alloy materials such as gas brazing, furnace brazing and induction brazing, solder has excellent wetting, spreading property and permeance property on mother metal, and Joint intensity can reach 110MPa ~ 140Mpa; The needs of air-conditioning, refrigerator complete machine industry, industry low cost such as refrigeration accessory industry and track traffic etc., high reliability green manufacturing can be met.
Accompanying drawing illustrates:
Accompanying drawing 1 for Zn-2Al solder in the present invention is on 5052 aluminium alloy mother metals, along with the spreading area curve of gallium oxide changes of contents;
Accompanying drawing 2, for Zn-2Al solder in the present invention is on 5052 aluminium alloy mother metals, along with the spreading area curve of rubidium fluoride RbF changes of contents;
Accompanying drawing 3, for Zn-2Al solder in the present invention is on 6063 aluminium alloy mother metals, along with the spreading area curve of gallium oxide changes of contents;
Accompanying drawing 4, for Zn-2Al solder in the present invention is on 6063 aluminium alloy mother metals, along with the spreading area curve of rubidium fluoride RbF changes of contents;
Accompanying drawing 5, for Zn-2Al solder in the present invention is on Q235 steel mother metal, along with the spreading area curve of gallium oxide changes of contents;
Accompanying drawing 6, for Zn-2Al solder in the present invention is on Q235 steel mother metal, along with the spreading area curve of rubidium fluoride RbF changes of contents;
Accompanying drawing 7, for Zn-2Al solder in the present invention is on 304 stainless steel mother metals, along with the spreading area curve of gallium oxide changes of contents;
Accompanying drawing 8, for Zn-2Al solder in the present invention is on 304 stainless steel mother metals, along with the spreading area curve of rubidium fluoride RbF changes of contents;
Accompanying drawing 9, brazed seam shear strength test data for embodiment 1 to 6 in the present invention and comparative example 1 to 3;
Accompanying drawing 10, be that brazing flux of the present invention adds 0.0001mol.% gallium oxide, coupling Zn-2Al solder, brazing flux solder and 5052 aluminium alloys analyze (i.e. XRD analysis) result at the residue X-ray diffraction that 500 DEG C are reacted 3 minutes;
Accompanying drawing 11, be that brazing flux of the present invention adds 0.0001mol.% gallium oxide, coupling Zn-2Al solder, brazing flux solder and Q235 steel analyze (i.e. XRD analysis) result at the residue X-ray diffraction that 500 DEG C are reacted 3 minutes.
Below in conjunction with embodiment and accompanying drawing, the present invention is set forth further:
Detailed description of the invention:
Embodiment 1, a kind of novel rubidium caesium brazing flux, by mole recipe ratio (in a mole), its component is configured to: the rubidium fluoride RbF (RbF) of 0.12 mole, the cesium fluoride (CsF) of 0.5 mole, the aluminium oxide (Al of 0.001 mole
2o
3), the lithium fluoride (LiF) of 0.02 mole, the gallium oxide (Ga of 0.0001 mole
2o
3), surplus is aluminum fluoride (AlF
3).
The novel rubidium caesium brazing flux that said ratio obtains, propane is adopted to carry out gas brazing as fuel gas, coordinate Zn98-Al2, Al51.5-Si6.5-Zn42, A188-Si12 solder, with 304 corrosion resistant plate+6063 aluminium alloy plates, Q235 steel plate+6063 aluminium alloy plate, T2 red copper+5052 aluminium alloy plate, test according to GB/T 11363-2008 " soldering joint strength test method ", brazed seam shearing strength reaches 110MPa ~ 140MPa respectively.
Embodiment 2, a kind of novel rubidium caesium brazing flux, by mole recipe ratio (in a mole), its component is configured to: the rubidium fluoride RbF (RbF) of 0.5 mole, the cesium fluoride (CsF) of 0.12 mole, the aluminium oxide (Al of 0.2 mole
2o
3), the lithium fluoride (LiF) of 0.001 mole, the gallium oxide (Ga of 0.02 mole
2o
3), surplus is aluminum fluoride (AlF
3).
The novel rubidium caesium brazing flux that said ratio obtains, propane is adopted to carry out gas brazing as fuel gas, coordinate Zn98-Al2, Al51.5-Si6.5-Zn42, Al88-Si12 solder, with 304 corrosion resistant plate+6063 aluminium alloy plates, Q235 steel plate+6063 aluminium alloy plate, T2 red copper+5052 aluminium alloy plate, test according to GB/T 11363-2008 " soldering joint strength test method ", brazed seam shearing strength reaches 110MPa ~ 140MPa respectively.
Embodiment 3, a kind of novel rubidium caesium brazing flux, by mole recipe ratio (in a mole), its component is configured to: the rubidium fluoride RbF (RbF) of 0.25 mole, the cesium fluoride (CsF) of 0.25 mole, the aluminium oxide (Al of 0.01 mole
2o
3), the lithium fluoride (LiF) of 0.01 mole, the gallium oxide (Ga of 0.001 mole
2o
3), surplus is aluminum fluoride (AlF
3).
The novel rubidium caesium brazing flux that said ratio obtains, propane is adopted to carry out gas brazing as fuel gas, coordinate Zn98-Al2, Al51.5-Si6.5-Zn42, Al88-Si12 solder, with 304 corrosion resistant plate+6063 aluminium alloy plates, Q235 steel plate+6063 aluminium alloy plate, T2 red copper+5052 aluminium alloy plate, test according to GB/T 11363-2008 " soldering joint strength test method ", brazed seam shearing strength reaches 110MPa ~ 140MPa respectively.
Embodiment 4, a kind of novel rubidium caesium brazing flux, by mole recipe ratio (in a mole), its component is configured to: the rubidium fluoride RbF (RbF) of 0.2 mole, the cesium fluoride (CsF) of 0.3 mole, the aluminium oxide (Al of 0.05 mole
2o
3), the lithium fluoride (LiF) of 0.01 mole, the gallium oxide (Ga of 0.0005 mole
2o
3), surplus is aluminum fluoride (AlF
3).
The novel rubidium caesium brazing flux that said ratio obtains, propane is adopted to carry out gas brazing as fuel gas, coordinate Zn98-Al2, Al51.5-Si6.5-Zn42, Al88-Si12 solder, with 304 corrosion resistant plate+6063 aluminium alloy plates, Q235 steel plate+6063 aluminium alloy plate, T2 red copper+5052 aluminium alloy plate, test according to GB/T 11363-2008 " soldering joint strength test method ", brazed seam shearing strength reaches 110MPa ~ 140MPa respectively.
The novel rubidium caesium brazing flux of embodiment 5 one kinds, by mole recipe ratio (in a mole), its component is configured to: the rubidium fluoride RbF (RbF) of 0.35 mole, the cesium fluoride (CsF) of 0.22 mole, the aluminium oxide (Al of 0.01 mole
2o
3), the lithium fluoride (LiF) of 0.01 mole, the gallium oxide (Ga of 0.0005 mole
2o
3), surplus is aluminum fluoride (AlF
3).
The novel rubidium caesium brazing flux that said ratio obtains, propane is adopted to carry out gas brazing as fuel gas, coordinate Zn98-A12, A151.5-Si6.5-Zn42, Al88-Si12 solder, with 304 corrosion resistant plate+6063 aluminium alloy plates, Q235 steel plate+6063 aluminium alloy plate, T2 red copper+5052 aluminium alloy plate, test according to GB/T 11363-2008 " soldering joint strength test method ", brazed seam shearing strength reaches 110MPa ~ 140MPa respectively.
Embodiment 6, a kind of novel rubidium caesium brazing flux, by mole recipe ratio (in a mole), its component is configured to: the rubidium fluoride RbF (RbF) of 0.32 mole, the cesium fluoride (CsF) of 0.23 mole, the aluminium oxide (Al of 0.03 mole
2o
3), the lithium fluoride (LiF) of 0.015 mole, the gallium oxide (Ga of 0.005 mole
2o
3), surplus is aluminum fluoride (AlF
3).
The novel rubidium caesium brazing flux that said ratio obtains, propane is adopted to carry out gas brazing as fuel gas, coordinate Zn98-Al2, Al51.5-Si6.5-Zn42, Al88-Si12 solder, with 304 corrosion resistant plate+6063 aluminium alloy plates, Q235 steel plate+6063 aluminium alloy plate, T2 red copper+5052 aluminium alloy plate, test according to GB/T 11363-2008 " soldering joint strength test method ", brazed seam shearing strength reaches 110MPa ~ l40MPa respectively.
In addition, need further illustrate, compared with studying, creativeness of the present invention was in the past:
One, gallium oxide (Ga has been found
2o
3) " kelvin effect " can further improve CsF-RbF-AlF
3" the striping ability " of brazing flux, thus invented the New type soldering flux better to aluminium alloy, Q235 steel and 304 stainless steel spreading properties.
The kelvin effect of high frequency electric is a kind of natural phenomena in physics (electromagnetism), has been well-known.But, in brazing process, certain oxide or halid " kelvin effect " rarely seen report.The present inventor finds, at CsF-RbF-AlF
3in brazing flux, add the Ga of extremely trace
2o
3(0.0001 mole ~ 0.02 mole), can make the spreading area of solder improve about 50% ~ 90%.By finding the solder surface " energy spectrum analysis " of sprawling, there is " a large amount of " Ga on the solder surface of sprawling
2o
3, and the edge that solder is sprawled, Ga
2o
3" relative quantity " higher than the Ga of the solder middle part of sprawling
2o
3content, its chemical reaction mechanism of deducibility is due to Ga thus
2o
3kelvin effect, make Ga
2o
3" fast " can flow, and then promote CsF-RbF-AlF
3the flowing of brazing flux, thus the spreading ability and the spreading area that improve solder.
As can be seen from Fig. 1 ~ Fig. 8, at CsF-AlF
3add RbF in brazing flux, the spreading area of solder can be significantly improved; But, at CsF-RbF-AlF
3the Ga of trace is added again in brazing flux
2o
3, the spreading area of solder can also be improved further.Fig. 1, Fig. 3, Fig. 5, Fig. 7 are the comparing results on Fig. 2, Fig. 4, Fig. 6, Fig. 8 basis.As space is limited, this description simply show Zn-2Al solder on 5052,6063 aluminium alloys, Q235 steel, 304 stainless steel mother metals, along with the spreading area curve of gallium oxide changes of contents and comparison example are along with the spreading area curve of rubidium fluoride RbF changes of contents.But the spreading area change of Al-12Si, Al-Si-Zn solder is roughly the same with the variation tendency of Zn-2Al solder.
For the ease of test and with pertinent literature Data Comparison, Fig. 1 ~ Fig. 8 all adopts mass percent, but substantially identical with the result in the molar fraction span of Theoretical Design.In Fig. 1 and Fig. 3, Ga
2o
3when mass percent reaches 0.009%, spreading area change tends towards stability, but in Fig. 5 and Fig. 7, Ga
2o
3when mass percent reaches 0.05%, spreading area change just tends towards stability.
Due to Ga
2o
3stable and price is far below GaF
3, therefore, add Ga
2o
3the above-mentioned excellent properties obtained, in actual production, has good economic benefit.
Two, gallium oxide (Ga has been found
2o
3), the mechanism of action of CsF and RbF, thus preferably determine Ga
2o
3, CsF and RbF interpolation scope.
By adding 0.0001mol.% gallium oxide to brazing flux, coupling Zn-2Al solder, found that at the XRD analysis that 500 DEG C are reacted the reaction residues of 3 minutes with 5052,6063 aluminium alloys, all has Cs in reaction residues
11o
3, MgGa
2o
4occur; Found that all have AlPO in reaction residues with Q235 steel, 304 stainless steels at the XRD analysis that 500 DEG C are reacted the reaction residues of 3 minutes
4, FePO
4occur (see accompanying drawing 10, Figure 11).
Tell us to the above results " abnormal magical ", with the addition of Ga
2o
3csF-RbF-AlF
3when the oxide-film of brazing flux and aluminum alloy surface reacts, " extremely micro-" Ga
2o
3namely can " enrichment " participate in reacting and playing an important role, and with MgGa
2o
4form occur, illustrate brazing flux with than Al
2o
3the reaction of more stable MgO is also " Be very effective ".RbF then has no and occurs as " Compound Phase " in residue, the compound " Dispersed precipitate " of Rb is described, plays a part " catalysis ", " helping weldering "; CsF is then always with Cs
11o
3form occur, illustrate CsF really with Al
2o
3, MgO there occurs chemical reaction, replaced Al
2o
3, O atom in MgO, this result " explains " in Fig. 1, Fig. 3 along with Ga
2o
3the increase of addition, Zn-2Al solder spreading area on 5052,6063 aluminium alloys increases further, and all than CsF-RbF-AlF
3the reason that brazing flux (see Fig. 2, Fig. 4) spreading area is large.
With the course of reaction of steel, due to Ga
2o
3interpolation, P (phosphorus) element in " have activated " steel participates in reaction.From GB/T 700-2006 " carbon structural steels ", in Q235 steel P≤0.045 (mass percent); From GB/T 20878-2007 " the stainless steel and refractory steel trade mark and chemical composition ", 304 (being equivalent to the trade mark 06Cr19Ni10 in new standard) stainless P≤0.045 (mass percents), but the relative Ga of content of P in two kinds of steel
2o
3addition still exceed one times of even several times.But, due to Ga
2o
3" catalytic action ", make trace P given play to the special role of " exceeding the imagination ".AlPO in reaction residues
4, FePO
4appearance (see accompanying drawing 11), and the compound had no containing Cs, Rb, Ga occurs, illustrates on the one hand " enrichment phenomenon " that occurred P, on the other hand, illustrates that the compound of Cs, Rb, Ga is all the state of " Dispersed precipitate ".
In view of the restriction of " sensitivity " of XRD analysis method, the diffraction maximum generally lower than the compound of 1% is all difficult to distinguish, but this does not affect Ga
2o
3, CsF and RbF mechanism of action analysis with determine.
In view of the analysis of above-mentioned result of the test with to Ga
2o
3, CsF and RbF role determination, the present invention optimizes further and determines Ga
2o
3, CsF and RbF interpolation scope, thus make brazing flux of the present invention have more excellent performance.
The test data that embodiment 1 ~ embodiment 6 carries out testing according to GB/T 11363-2008 " soldering joint strength test method " is arranged into Fig. 9, can more clearly understand and understand technical characterstic and the technique effect of this invention.In Fig. 9, mole recipe ratio of comparative example 1 to comparative example 3 is identical with embodiment 1, the raw material just used in preparation process are different, illustrate that the invention effect described in the embodiment of the present invention 1 to embodiment 6 is only relevant with its mole of recipe ratio with this, and have nothing to do with the raw material that its preparation process uses.
Claims (1)
1. a novel rubidium caesium brazing flux, it is characterized in that, its component is formed in one mole, by molal quantity proportioning be: the rubidium fluoride RbF of 0.12 mole ~ 0.5 mole, the cesium fluoride of 0.12 mole ~ 0.5 mole, the aluminium oxide of 0.001 mole ~ 0.2 mole, the lithium fluoride of 0.001 mole ~ 0.02 mole, the gallium oxide of 0.0001 mole ~ 0.02 mole, surplus is aluminum fluoride.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104816107A (en) * | 2015-06-03 | 2015-08-05 | 江西合纵锂业科技有限公司 | Medium-temperature type anti-corrosion fluoroaluminate soldering flux and preparation method thereof |
| CN105537806A (en) * | 2016-03-15 | 2016-05-04 | 江西东鹏新材料有限责任公司 | Zinc tetrafluoroborate containing caesium-rubidium brazing flux |
| CN105618961A (en) * | 2016-03-15 | 2016-06-01 | 南京理工大学 | Cesium and rubidium brazing flux containing zinc tetrafluoroborate hydrate |
| CN105618960A (en) * | 2016-03-15 | 2016-06-01 | 南京航空航天大学 | Soldering flux suitable for aluminum steel brazing |
| CN106736046A (en) * | 2016-12-26 | 2017-05-31 | 江西东鹏新材料有限责任公司 | Caesium rubidium brazing flux containing ceric fluoride |
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| JPH01284496A (en) * | 1988-05-11 | 1989-11-15 | Hashimoto Kasei Kogyo Kk | Flux for brazing of aluminum material having excellent suspension stability and its production |
| CN103909359A (en) * | 2014-03-04 | 2014-07-09 | 浙江新锐焊接材料有限公司 | Brazing aluminum steel and cesium and rubidium containing brazing flux thereof |
| CN103934595A (en) * | 2014-03-04 | 2014-07-23 | 南京航空航天大学 | Cesium-rubidium brazing flux used for brazing aluminum steel and aluminum bronze |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104816107A (en) * | 2015-06-03 | 2015-08-05 | 江西合纵锂业科技有限公司 | Medium-temperature type anti-corrosion fluoroaluminate soldering flux and preparation method thereof |
| CN104816107B (en) * | 2015-06-03 | 2017-09-12 | 江西合纵锂业科技有限公司 | Middle warm type anticorrosion fluoaluminate brazing flux and preparation method thereof |
| CN105537806A (en) * | 2016-03-15 | 2016-05-04 | 江西东鹏新材料有限责任公司 | Zinc tetrafluoroborate containing caesium-rubidium brazing flux |
| CN105618961A (en) * | 2016-03-15 | 2016-06-01 | 南京理工大学 | Cesium and rubidium brazing flux containing zinc tetrafluoroborate hydrate |
| CN105618960A (en) * | 2016-03-15 | 2016-06-01 | 南京航空航天大学 | Soldering flux suitable for aluminum steel brazing |
| CN105618961B (en) * | 2016-03-15 | 2018-07-31 | 南京理工大学 | A kind of caesium rubidium brazing flux containing zinc fluoroborate |
| CN106736046A (en) * | 2016-12-26 | 2017-05-31 | 江西东鹏新材料有限责任公司 | Caesium rubidium brazing flux containing ceric fluoride |
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