CN105364335A - Al-Ag-Cu-Mg aluminium base alloy-state brazing filler metal and preparation method thereof - Google Patents

Abstract

The invention discloses an Al-Ag-Cu-Mg aluminium base alloy-state brazing filler metal and a preparation method thereof. The brazing filler metal is mainly used for vacuum brazing for aluminium alloys. The brazing filler metal is composed of the following ingredients with the following contents: 35-45wt% of Ag, 18-22wt% of Cu, 1.0-2.0wt% of Mg and the balance Al. The brazing filler metal has a low melting temperature, high brazing manufacturability, high wettability, and a high welding area ratio of greater than 90%; the brazing filler metal has a welding joint tensile strength sigma<b> of not less than 90MPa and a shear strength tau of not less than 60MPa, and is applicable to intermediate-temperate or step vacuum brazing for many aluminium alloys of 3A21, 2A50, 6063, 6061, LF6 and the like. The preparation method comprises the steps of material preparation, intermediate alloy preparation, alloy casting, heat treatment, hot forging, rolling and the like. The preparation method is simple in method and beneficial to batch production. Foil-shaped brazing filler metal with a thickness of 0.03-2.00mm can be prepared by virtue of the method, and the brazing filler metal is more applicable to vacuum brazing for aluminium alloy members with large specifications.

Description

Al-Ag-Cu-Mg acieral state solder and preparation method thereof

Technical field

The present invention relates to a kind of Al-Ag-Cu-Mg acieral state alloy classification welding, fill up the defect that aluminium base low-temperature brazing filler metal corrosion resistance is poor simultaneously, belong to metallurgical and calendering processing technique field.

Background technology

Soldering refers to and adopts the liquidus temperature metal lower than mother metal solidus temperature to make solder, by part and solder heat to brazing filler metal melts, utilizes solder wetting mother metal, and filling play movement is also mutually dissolved with mother metal and spreads and realize the method for union piece.The soldering application of aluminium alloy widely, as the manufacture of aluminium waveguide, evaporimeter, radiator and turbine, occupies an important position in the industries such as automobile, refrigeration, electronics, aviation.In brazing process, solder made by contain heavy metal (as Pb, Sn) alloy more low according to fusion temperature, and because between solder and brazing metal, electrode potential differs greatly, the corrosion resistance of joint is poor.Therefore, the soldering of aluminum current is adopt the solder brazing more than 450 DEG C substantially, and solder generally adopts Zn-Al and Al-Si alloy.

Aluminum Alloy Vacuum Brazing generally adopts Al-Si-Mg solder, especially 4004 trade mark components, but its fusion temperature is higher, be not suitable for 5A05 the vacuum brazing of 5A06 aluminium alloy.Known the aluminium alloy intermediate temperature solder trade mark Al-Si-Cu, Al-Si-Ge, Al-Si-Zn, Al-Ag-Ge, Al-Ag-Cu etc. are very crisp, are only suitable for cast bar and are difficult to be processed into foil-shaped brazing material, and corrosion resistance and brazing manufacturability poor.Domestic at present do not have the vacuum brazing material that low melting point corrosion resistance is good, excessive temperature brings mother metal burning risk, reducing solder temperature can avoid temperature on the impact of mother metal simultaneously effectively, therefore in the urgent need to developing the solder of a kind of fusion temperature scope 450 ~ 530 DEG C, solve 5A05 5A06 aluminum alloy vacuum welding bottleneck.

Summary of the invention

The object of the present invention is to provide a kind of Al-Ag-Cu-Mg acieral state solder, this solder is warm four constituent element solders during Aluminum Alloy Vacuum Brazing is used, and this solder Composition Design science, reasonable mixture ratio, can be applied to multiple aluminium alloy element soldering.

Another object of the present invention is to the preparation method providing a kind of described Al-Ag-Cu-Mg acieral state solder, the method is simple, is beneficial to the batch production of solder.

For achieving the above object, the present invention includes following technical scheme:

A kind of Al-Ag-Cu-Mg acieral state solder, this solder is grouped into by the one-tenth of following content: Ag35 ~ 45wt%, Cu18 ~ 22wt%, Mg1.0 ~ 2.0wt%, Al surplus.

Al-Ag-Cu-Mg acieral state solder as above, preferably, the thickness of described solder is 0.03 ~ 2.00mm.

On the other hand, the invention provides the preparation method of Al-Ag-Cu-Mg acieral state solder as above, the method comprises the following steps:

I. get the raw materials ready: take pure Al, Ag, Cu and Mg raw material according to the mass percent of each component;

II. prepare intermediate alloy: fine aluminium, copper 1: 0.5 ~ 1.5 are added intermediate frequency furnace in mass ratio, melting obtains Al-Cu intermediate alloy; Be 1: 5 ~ 15 add intermediate frequency furnace in mass ratio by silver, aluminium, melting obtains Al-Ag intermediate alloy;

III. alloy casting: graphite crucible surplus fine aluminium being put into intermediate frequency furnace, heats up, and after aluminium ingot all melts, add Al-Cu, Al-Ag intermediate alloy and magnesium prepared by Step II successively, after melting, casting obtains ingot casting;

IV. ingot homogenization heat treatment: the ingot casting obtained by Step II I is placed in resistance furnace, in 300 ~ 460 DEG C of insulation 8 ~ 15h;

V. warm and hot forging: warm and hot forging temperature 350 ~ 460 DEG C, the obtained thickness of strip 8 ~ 15mm of forging;

VI. hot split rolling method: the forging band hot rolling cogging that step V is obtained, rolling temperature is 350 ~ 460 DEG C;

VII. cold rolling: the band after hot rolling is carried out cold rolling, cold rolling carries out 3 ~ 5 times, carries out annealing in process after each cold rolling, and annealing temperature is 350 ~ 440 DEG C, obtains the acieral state solder of required size.

Preparation method as above, preferably, described step I Raw selects the purity of aluminium to be greater than 99.9%, and the purity of silver is greater than 99.9%, and copper selects oxygen-free copper, and the purity of magnesium is greater than 99.99%.

Preparation method as above, preferably, the concrete operations that described Step II prepares intermediate alloy are as follows:

In the graphite crucible of intermediate frequency furnace, add aluminium ingot, heat up after aluminium ingot fusing, add copper ingot, the mass ratio of aluminium, copper is 1: 0.5 ~ 1.5; Make furnace temperature rise to 750 ~ 800 DEG C, fully stir, after copper ingot is all melting down, ingot casting, alloy casting temperature 700 ~ 750 DEG C, obtains Al-Cu intermediate alloy;

In the graphite crucible of intermediate frequency furnace, add aluminium ingot, heat up after aluminium ingot fusing, make furnace temperature rise to 700 ~ 900 DEG C, high purity silver is pressed into aluminium liquid, silver, aluminium are 1: 5 ~ 15 in mass ratio; After high purity silver is all melting down, at 700 ~ 900 DEG C of insulation 5 ~ 15min, fully stir, ingot casting, alloy casting temperature 850 ~ 900 DEG C, obtains Al-Ag intermediate alloy.

Preparation method as above, preferably, the concrete operations of described Step II I alloy casting are as follows: graphite crucible surplus fine aluminium being put into intermediate frequency furnace, heat up, after aluminium ingot all melts, add Al-Cu, Al-Ag intermediate alloy prepared by Step II successively, after intermediate alloy is all melting down, be warming up to 650 ~ 850 DEG C, insulation 10 ~ 20min, carry out degassed, slag making with carbon trichloride, skim complete, removing surface scum, be warming up to 650 ~ 700 DEG C, add magnesium, fully stir, casting obtains ingot casting.

Preparation method as above, preferably, in described Step II I, the consumption of carbon trichloride is 0.2 ~ 1wt% of furnace volume.

Preparation method as above, preferably, in described step VII, cold rolling pass working modulus controls 3% ~ 5%, and the general working rate of annealing in process is 9% ~ 25%.

Preparation method as above, preferably, said method comprising the steps of:

I. get the raw materials ready: select raw material, wherein the purity of aluminium is greater than 99.9%, the purity of silver is greater than 99.9%, and copper selects oxygen-free copper, and the purity of magnesium is greater than 99.99%; Raw material is taken according to the mass percent of each component;

II. intermediate alloy is prepared:

In the graphite crucible of intermediate frequency furnace, add aluminium ingot, heat up after aluminium ingot fusing, add copper ingot, aluminium, copper mass ratio is 1: 0.5 ~ 1.5; Make furnace temperature rise to 700 ~ 750 DEG C, fully stir, after copper ingot is all melting down, ingot casting, alloy casting temperature 700 ~ 750 DEG C, obtains Al-Cu intermediate alloy;

In the graphite crucible of intermediate frequency furnace, add aluminium ingot, heat up after aluminium ingot fusing, make furnace temperature rise to 700 ~ 900 DEG C, high purity silver is pressed into aluminium liquid, silver, aluminium mass ratio are 1: 5 ~ 15; After high purity silver is all melting down, at 700 ~ 900 DEG C of insulation 5 ~ 15min, fully stir, ingot casting, alloy casting temperature 850 ~ 900 DEG C, obtains Al-Ag intermediate alloy;

III. alloy casting: graphite crucible fine aluminium being put into intermediate frequency furnace, heats up, after aluminium ingot all melts, add Al-Cu, Al-Ag intermediate alloy successively, after intermediate alloy is all melting down, be warming up to 650 ~ 850 DEG C, insulation 10 ~ 20min, degassed, slag making is carried out with carbon trichloride, the consumption of carbon trichloride is 0.3 ~ 0.4wt% of furnace volume, skims completely to be warming up to 650 ~ 700 DEG C, adds magnesium, abundant stirring, casting obtains ingot casting;

IV. ingot casting heat treatment: the ingot casting obtained is placed in resistance furnace, in 300 ~ 460 DEG C of insulation 8 ~ 15h;

V. warm and hot forging: warm and hot forging temperature 350 ~ 460 DEG C, the obtained thickness of strip 8 ~ 15mm of forging;

VI. hot split rolling method: warm and hot forging band is carried out hot rolling cogging, rolling temperature is 350 ~ 460 DEG C, and pass reduction is 10% ~ 12%;

VII. cold rolling: the band after hot rolling is carried out cold rolling, the temperature of cold rolling is 5 DEG C ~ 50 DEG C, cold rolling pass working modulus controls 3% ~ 5%, cold rolling carries out 3 ~ 5 times, annealing in process is carried out after each cold rolling, annealing temperature is 300 ~ 440 DEG C, and insulation 1 ~ 3h, the general working rate of cold rolling is 9% ~ 25%.

Another aspect, the invention provides a kind of Al-Ag-Cu-Mg acieral state solder, this solder adopts the method as above described in any one to prepare.

Pass reduction of the present invention refers in plate strip rolling process, the calculated value of amounts of thickness variation before and after a certain passes.Thickness × 100% before i.e. pass reduction=(thickness after the passage of the thickness-rolling before rolling)/rolling.

Beneficial effect of the present invention is the following aspects:

1. the Al-Ag-Cu-Mg acieral state solder that prepared by the present invention is warm four constituent element solders during Aluminum Alloy Vacuum Brazing is used, a small amount of Mg is added at the eutectic point of Al, Ag, Cu, Material Melt temperature can be reduced on the one hand, the more important thing is that Mg element in solder exists and good effect has been abolished to mother metal oxide-film, rate of deposition and weld strength can be strengthened.The fusion temperature of this Al-Ag-Cu-Mg acieral state foil-shaped brazing material is low, is 470 ~ 500 DEG C, can not completing vacuum brazing higher than when 550 DEG C to aluminium alloy; The brazing manufacturability of this solder is good, and have good wetability, rate of deposition is higher than 90%; Weld seam tensile strength sigma _b>=90MPa, shear strength τ>=60MPa, be suitable for 3A21,2A50,6063 and 6061, temperature or classification vacuum brazing in the multiple aluminium alloy such as LF6.

2. large for Al-Ag-Cu acieral fragility, be difficult to the technical problem being processed into foil-shaped brazing material, the present invention have studied the preparation technology of foil-shaped brazing material, adopts " founding-heat treatment-warm and hot forging-Re split rolling method-cold rolling " method.Change alloy microstructure in warm and hot forging step, produce brittlement phase disperse; Produce a large amount of brittlement phase enrichment in hot split rolling method step, make material have good ductility.It is 0.03 ~ 2.00mm that this solder thickness can reach thickness, is more suitable for the vacuum brazing compared with large-size aluminum alloy component.

Accompanying drawing explanation

Fig. 1 is the differential thermal analysis collection of illustrative plates of the Al-Ag-Cu-Mg alloy state solder that embodiment 1 obtains.

Detailed description of the invention

Embodiment below in conjunction with concrete burdening calculation is further described Al-Ag-Cu-Mg alloy state solder of the present invention and preparation method thereof.

Embodiment 1 prepares Al-Ag-Cu-Mg acieral state solder ()

Step I: raw material selection

Aluminium: select rafifinal, purity is not less than 99.9%; Select high purity silver, purity is not less than 99.9%; Copper selects oxygen-free copper; Magnesium: purity should be not less than 99.99%.

Step II: prepared by intermediate alloy

1, the melting of Al-Cu50 intermediate alloy

1) equipment: intermediate frequency furnace;

2) mould: water cooled mo(u)ld: 30 × 210 × 440mm;

3) prepare burden: 10kg batching pressed by every stove;

4) operate: take aluminium ingot and copper ingot respectively according to weight ratio 1: 0.5.Add aluminium ingot in crucible after, heat up, after aluminium ingot fusing, add copper ingot, make furnace temperature rise to 700 DEG C, fully stir, after copper ingot is all melting down, casting, alloy casting temperature 700 DEG C.

2, the melting of Al-Ag90 intermediate alloy

1) equipment: intermediate frequency furnace;

2) mould: water cooled mo(u)ld: 30 × 210 × 440mm;

3) prepare burden: 10kg batching pressed by every stove;

4) operate: take aluminium ingot and silver ingot respectively according to weight ratio 1: 0.9.Add aluminium ingot in crucible after, heat up, after aluminium ingot fusing, make furnace temperature rise to 800 DEG C, high purity silver is added aluminium liquid, after metal is all melting down, at 800 DEG C of insulation 10min, fully stir, casting, alloy casting temperature 850 DEG C.

Step II I: alloy casting

1) equipment: intermediate frequency furnace;

2) mould: Φ 80 × 300mm water cooled mo(u)ld;

3) prepare burden: prepare burden by 80kg furnace volume;

4) operate: 18.5kg fine aluminium is put into graphite crucible, heat up, after aluminium ingot all melts, add Al-Cu5029.6kg, Al-Ag9031.1kg intermediate alloy successively.After intermediate alloy is all melting down, be warming up to 750 DEG C, insulation 15min, carries out degassed, slag making with carbon trichloride 240g, skims, be warming up to 650 DEG C, adds 0.8kg magnesium, fully stirs, and casts containing the alloy cast ingot of Cu18wt%, Ag35wt%, Mg1.0wt%.

Step IV: ingot casting heat treatment

1) equipment: resistance furnace;

2) heating-up temperature: 350 DEG C;

3) temperature retention time: 12h;

Step V: warm and hot forging

1) equipment: forging machine;

2) warm and hot forging temperature: 350 DEG C;

3) warm and hot forging thickness of strip is 15mm.

Step VI: hot split rolling method

Slab hot-rolling breakdown rolling temperaure is 350 DEG C, and pass reduction is 10%.

Step VII: cold rolling

Cold rolling pass working modulus controls 3%, and between three annealing, general working rate controls 9%, and the annealing temperature eliminating work hardening employing is 400 DEG C, insulation 2h.

Obtain the Al-Ag-Cu-Mg acieral state solder that thickness is 2.0mm.Differential thermal analysis collection of illustrative plates as shown in Figure 1.

Embodiment 2 prepares Al-Ag-Cu-Mg acieral state solder (two)

Step I: raw material selection

Aluminium: select rafifinal, purity is not less than 99.9%; Select high purity silver, purity is not less than 99.9%; Copper selects oxygen-free copper; Magnesium: purity should be not less than 99.99%.

Step II: prepared by intermediate alloy

1, the melting of Al-Cu50 intermediate alloy

1) equipment: intermediate frequency furnace;

2) mould: water cooled mo(u)ld: 30 × 210 × 440mm;

3) prepare burden: 10kg batching pressed by every stove;

4) operate: take aluminium ingot and copper ingot respectively according to weight ratio 1: 0.5.Add aluminium ingot in crucible after, heat up, after aluminium ingot fusing, add copper ingot, make furnace temperature rise to 750 DEG C, fully stir, after copper ingot is all melting down, casting, alloy casting temperature 750 DEG C.

2, the melting of Al-Ag90 intermediate alloy

1) equipment: intermediate frequency furnace;

2) mould: water cooled mo(u)ld: 30 × 210 × 440mm;

3) prepare burden: 10kg batching pressed by every stove;

4) operate: take aluminium ingot and silver ingot respectively according to weight ratio 1: 0.9.Add aluminium ingot in crucible after, heat up, after aluminium ingot fusing, make furnace temperature rise to 800 DEG C, high purity silver is entered aluminium liquid, after metal is all melting down, at 800 DEG C of insulation 10min, fully stir, casting, alloy casting temperature 850 DEG C.

Step II I: alloy casting

1) equipment: intermediate frequency furnace;

2) mould: Φ 80 × 300mm water cooled mo(u)ld;

3) prepare burden: prepare burden by 100kg furnace volume;

4) operate: 14.1kg fine aluminium is put into graphite crucible, heat up, after aluminium ingot all melts, add Al-Cu5040kg, Al-Ag9044.4kg intermediate alloy successively.After intermediate alloy is all melting down, be warming up to 650 DEG C, insulation 10min, carry out degassed, slag making with carbon trichloride, carbon trichloride consumption is 0.4% of furnace volume, skims.Be warming up to 700 DEG C, add 1.5kg magnesium, fully stir, cast containing the alloy cast ingot of Cu20wt%, Ag40wt%, Mg1.5wt%.

Step IV: ingot casting heat treatment

1) equipment: resistance furnace;

2) heating-up temperature: 400 DEG C;

3) temperature retention time: 15h;

Step V: warm and hot forging

1) equipment: forging machine;

2) warm and hot forging temperature: 460 DEG C;

3) warm and hot forging thickness of strip is 8mm;

Step VI: hot split rolling method

Slab hot-rolling breakdown rolling temperaure is 460 DEG C, and pass reduction is 12%.

Step VII: cold rolling

Cold rolling pass working modulus controls 5%, and between three annealing, general working rate controls 15%, and the annealing temperature eliminating work hardening employing is 440 DEG C, insulation 3h.

Obtain the Al-Ag-Cu-Mg acieral state solder that thickness is 0.05mm.

Embodiment 3 prepares Al-Ag-Cu-Mg acieral state solder (three)

Step I: raw material selection

Aluminium: select rafifinal, purity is not less than 99.9%; Select high purity silver, purity is not less than 99.9%; Copper selects oxygen-free copper; Magnesium: purity should be not less than 99.99%.

Step II: prepared by intermediate alloy

1, the melting of Al-Cu50 intermediate alloy

1) equipment: intermediate frequency furnace;

2) mould: water cooled mo(u)ld: 30 × 210 × 440mm;

3) prepare burden: 10kg batching pressed by every stove;

4) operate: take aluminium ingot and copper ingot respectively according to weight ratio 1: 0.5.Add aluminium ingot in crucible after, heat up, after aluminium ingot fusing, add copper ingot, make furnace temperature rise to 740 DEG C, fully stir, after copper ingot is all melting down, casting, alloy casting temperature 700 DEG C.

2, the melting of Al-Ag90 intermediate alloy

1) equipment: intermediate frequency furnace;

2) mould: water cooled mo(u)ld: 30 × 210 × 440mm;

3) prepare burden: 10kg batching pressed by every stove;

4) operate: take aluminium ingot and silver ingot respectively according to weight ratio 1: 0.9.Add aluminium ingot in crucible after, heat up, after aluminium ingot fusing, make furnace temperature rise to 900 DEG C, high purity silver is entered aluminium liquid, after metal is all melting down, at 800 DEG C of insulation 15min, fully stir, casting, alloy casting temperature 850 DEG C.

Step II I: alloy casting

1) equipment: intermediate frequency furnace;

2) mould: Φ 80 × 300mm water cooled mo(u)ld;

3) prepare burden: prepare burden by 120kg furnace volume;

4) operate: 4.8kg aluminium is put into graphite crucible, heat up, after aluminium ingot all melts, add Al-Cu5052.8kg, Al-Ag9060kg intermediate alloy successively.After intermediate alloy is all melting down, be warming up to 800 DEG C, insulation 20min, carry out degassed, slag making with carbon trichloride, carbon trichloride consumption is 0.35% of furnace volume, skims.Be warming up to 650 DEG C, add 2.4kg magnesium, fully stir, cast containing the alloy cast ingot of Cu22wt%, Ag45wt%, Mg2wt%.

Step IV: ingot casting heat treatment

1) equipment: resistance furnace;

2) heating-up temperature: 400 DEG C;

3) temperature retention time: 10h;

Step V: warm and hot forging

1) equipment: forging machine;

2) warm and hot forging temperature: 450 DEG C;

3) warm and hot forging thickness of strip is 10mm.

Step VI: hot split rolling method

Slab hot-rolling breakdown rolling temperaure is 450 DEG C, and pass reduction is 10%.

Step VII: cold rolling

Cold rolling pass working modulus controls 3%, and between three annealing, general working rate controls 9%, and the annealing temperature eliminating work hardening employing is 300 DEG C, insulation 2h.

Obtain the Al-Ag-Cu-Mg acieral state solder that thickness is 1.0mm.

Embodiment 4 prepares Al-Ag-Cu-Mg acieral state solder (four)

Step I: raw material selection

Aluminium: select rafifinal, purity is not less than 99.9%; Select high purity silver, purity is not less than 99.9%; Copper selects oxygen-free copper; Magnesium: purity should be not less than 99.99%.

Step II: prepared by intermediate alloy

1, the melting of Al-Cu50 intermediate alloy

1) equipment: intermediate frequency furnace;

2) mould: water cooled mo(u)ld: 30 × 210 × 440mm;

3) prepare burden: 10kg batching pressed by every stove;

4) operate: take aluminium ingot and copper ingot respectively according to weight ratio 1: 0.5.Add aluminium ingot in crucible after, heat up, after aluminium ingot fusing, add copper ingot, make furnace temperature rise to 780 DEG C, fully stir, after copper ingot is all melting down, casting, alloy casting temperature 720 DEG C.

2, the melting of Al-Ag90 intermediate alloy

1) equipment: intermediate frequency furnace;

2) mould: water cooled mo(u)ld: 30 × 210 × 440mm;

3) prepare burden: 10kg batching pressed by every stove;

4) operate: take aluminium ingot and silver ingot respectively according to weight ratio 1: 0.9.Add aluminium ingot in crucible after, heat up, after aluminium ingot fusing, make furnace temperature rise to 780 DEG C, high purity silver is entered aluminium liquid, after metal is all melting down, at 830 DEG C of insulation 12min, fully stir, casting, alloy casting temperature 870 DEG C.

Step II I: alloy casting

1) equipment: intermediate frequency furnace;

2) mould: Φ 80 × 300mm water cooled mo(u)ld;

3) prepare burden: prepare burden by 150kg furnace volume;

4) operate: 24.45kg fine aluminium is put into graphite crucible, heat up, after aluminium ingot all melts, add Al-Cu5058.5kg, Al-Ag9064.8kg intermediate alloy successively.After intermediate alloy is all melting down, be warming up to 650 DEG C, insulation 10min, carry out degassed, slag making with carbon trichloride, carbon trichloride consumption is 0.4% of furnace volume, skims.Be warming up to 650 DEG C, add 2.25kg, fully stir, cast containing the alloy cast ingot of Cu19.5wt%, Ag39.5wt%, Mg1.5wt%.

Step IV: ingot casting heat treatment

1) equipment: resistance furnace;

2) heating-up temperature: 460 DEG C;

3) temperature retention time: 8h;

Step V: warm and hot forging

1) equipment: forging machine;

2) warm and hot forging temperature: 440 DEG C;

3) warm and hot forging thickness of strip is 8mm.

Step VI: hot split rolling method

Slab hot-rolling breakdown rolling temperaure is 450 DEG C, and pass reduction is 12%.It is 2.5 ~ 1.5mm that hot rolling terminates rear thickness of strip

Step VII: cold rolling

Cold rolling pass working modulus controls 5%, and between three annealing, general working rate controls 15%, and the annealing temperature eliminating work hardening employing is 350 DEG C, insulation 2h.

Obtain the Al-Ag-Cu-Mg acieral state solder that thickness is 0.03mm.

Embodiment 5

Respectively foil-shaped brazing material prepared by embodiment 1, embodiment 2, embodiment 3, embodiment 4 is used for physical testing and Aluminum Alloy Vacuum Brazing test, obtains test data in table 1.The foil-shaped brazing material differential thermal analysis curve that embodiment 1 obtains is shown in Figure of description, and wherein Te refers to solder solid-state temperature, and Tf refers to solder liquidus temperature.

Table 1

Solid-state temperature

Liquidus temperature

Mother metal

Soldering maximum temperature

Rate of deposition

Weld seam shear strength

Embodiment 1

474℃

500℃

5A05

535℃

89.5％

62.5MPa

Embodiment 2

471℃

502℃

5A05

535℃

89.2％

61.5Mpa

Embodiment 3

475℃

506℃

5A05

535℃

88.8％

60.5Mpa

Embodiment 4

473℃

498℃

5A05

535℃

86.7％

60.0Mpa

The embodiment of Al-Ag-Cu-Mg acieral state solder of the present invention and preparation method thereof part is only enumerated in above-described embodiment; in the technical scheme of the invention described above: in described alloy compositions, the content of silver, copper, magnesium can unrestricted choice in prescribed limit; will not enumerate herein; therefore the technical scheme that above explanation comprises should be considered as exemplary, and be not used to the protection domain limiting the present patent application patent.

Claims (10)

1. an Al-Ag-Cu-Mg acieral state solder, is characterized in that, this solder is grouped into by the one-tenth of following content: Ag35 ~ 45wt%, Cu18 ~ 22wt%, Mg1.0 ~ 2.0wt%, Al surplus.

2. Al-Ag-Cu-Mg acieral state solder as claimed in claim 1, it is characterized in that, the thickness of described solder is 0.03 ~ 2.00mm.

3. the preparation method of Al-Ag-Cu-Mg acieral state solder as claimed in claim 1, it is characterized in that, the method comprises the following steps:

I. get the raw materials ready: take pure Al, Ag, Cu and Mg raw material according to the mass percent of each component;

II. prepare intermediate alloy: fine aluminium, copper 1: 0.5 ~ 1.5 are added intermediate frequency furnace in mass ratio, melting obtains Al-Cu intermediate alloy; Be 1: 5 ~ 15 add intermediate frequency furnace in mass ratio by silver, aluminium, melting obtains Al-Ag intermediate alloy;

III. alloy casting: graphite crucible surplus fine aluminium being put into intermediate frequency furnace, heats up, and after aluminium ingot all melts, add Al-Cu, Al-Ag intermediate alloy and magnesium prepared by Step II successively, after melting, casting obtains ingot casting;

IV. ingot homogenization heat treatment: the ingot casting obtained by Step II I is placed in resistance furnace, in 300 ~ 460 DEG C of insulation 8 ~ 15h;

V. warm and hot forging: warm and hot forging temperature 350 ~ 460 DEG C, the obtained thickness of strip 8 ~ 15mm of forging;

VI. hot split rolling method: the forging band hot rolling cogging that step V is obtained, rolling temperature is 350 ~ 460 DEG C;

VII. cold rolling: the band after hot rolling is carried out cold rolling, cold rolling carries out 3 ~ 5 times, carries out annealing in process after each cold rolling, and annealing temperature is 350 ~ 440 DEG C, obtains the acieral state solder of required size.

4. preparation method as claimed in claim 3, is characterized in that, described step I Raw selects the purity of aluminium to be greater than 99.9%, and the purity of silver is greater than 99.9%, and copper selects oxygen-free copper, and the purity of magnesium is greater than 99.99%.

5. preparation method as claimed in claim 3, it is characterized in that, the concrete operations that described Step II prepares intermediate alloy are as follows:

In the graphite crucible of intermediate frequency furnace, add aluminium ingot, heat up after aluminium ingot fusing, add copper ingot, the mass ratio of aluminium, copper is 1: 0.5 ~ 1.5; Make furnace temperature rise to 750 ~ 800 DEG C, fully stir, after copper ingot is all melting down, ingot casting, alloy casting temperature 700 ~ 750 DEG C, obtains Al-Cu intermediate alloy;

In the graphite crucible of intermediate frequency furnace, add aluminium ingot, heat up after aluminium ingot fusing, make furnace temperature rise to 700 ~ 900 DEG C, high purity silver is pressed into aluminium liquid, silver, aluminium are 1: 5 ~ 15 in mass ratio; After high purity silver is all melting down, at 700 ~ 900 DEG C of insulation 5 ~ 15min, fully stir, ingot casting, alloy casting temperature 850 ~ 900 DEG C, obtains Al-Ag intermediate alloy.

6. preparation method as claimed in claim 3, it is characterized in that, the concrete operations of described Step II I alloy casting are as follows: graphite crucible surplus fine aluminium being put into intermediate frequency furnace, heat up, after aluminium ingot all melts, add Al-Cu, Al-Ag intermediate alloy prepared by Step II successively, after intermediate alloy is all melting down, be warming up to 650 ~ 850 DEG C, insulation 10 ~ 20min, carry out degassed, slag making with carbon trichloride, skim complete, removing surface scum, be warming up to 650 ~ 700 DEG C, add magnesium, fully stir, casting obtains ingot casting.

7. preparation method as claimed in claim 6, it is characterized in that, in described Step II I, the consumption of carbon trichloride is 0.2 ~ 1wt% of furnace volume.

8. preparation method as claimed in claim 3, it is characterized in that, in described step VII, cold rolling pass working modulus controls 3% ~ 5%, and the general working rate of annealing in process is 9% ~ 25%.

9. preparation method as claimed in claim 3, is characterized in that, said method comprising the steps of:

I. get the raw materials ready: select raw material, wherein the purity of aluminium is greater than 99.9%, the purity of silver is greater than 99.9%, and copper selects oxygen-free copper, and the purity of magnesium is greater than 99.99%; Raw material is taken according to the mass percent of each component;

II. intermediate alloy is prepared:

In the graphite crucible of intermediate frequency furnace, add aluminium ingot, heat up after aluminium ingot fusing, add copper ingot, aluminium, copper mass ratio is 1: 0.5 ~ 1.5; Make furnace temperature rise to 700 ~ 750 DEG C, fully stir, after copper ingot is all melting down, ingot casting, alloy casting temperature 700 ~ 750 DEG C, obtains Al-Cu intermediate alloy;

In the graphite crucible of intermediate frequency furnace, add aluminium ingot, heat up after aluminium ingot fusing, make furnace temperature rise to 700 ~ 900 DEG C, high purity silver is pressed into aluminium liquid, silver, aluminium mass ratio are 1: 5 ~ 15; After high purity silver is all melting down, at 700 ~ 900 DEG C of insulation 5 ~ 15min, fully stir, ingot casting, alloy casting temperature 850 ~ 900 DEG C, obtains Al-Ag intermediate alloy;

III. alloy casting: graphite crucible fine aluminium being put into intermediate frequency furnace, heats up, after aluminium ingot all melts, add Al-Cu, Al-Ag intermediate alloy successively, after intermediate alloy is all melting down, be warming up to 650 ~ 850 DEG C, insulation 10 ~ 20min, degassed, slag making is carried out with carbon trichloride, the consumption of carbon trichloride is 0.3 ~ 0.4wt% of furnace volume, skims completely to be warming up to 650 ~ 700 DEG C, adds magnesium, abundant stirring, casting obtains ingot casting;

IV. ingot casting heat treatment: the ingot casting obtained is placed in resistance furnace, in 300 ~ 460 DEG C of insulation 8 ~ 15h;

V. warm and hot forging: warm and hot forging temperature 350 ~ 460 DEG C, the obtained thickness of strip 8 ~ 15mm of forging;

VI. hot split rolling method: warm and hot forging band is carried out hot rolling cogging, rolling temperature is 350 ~ 460 DEG C, and pass reduction is 10% ~ 12%;

VII. cold rolling: the band after hot rolling is carried out cold rolling, the temperature of cold rolling is 5 DEG C ~ 50 DEG C, cold rolling pass working modulus controls 3% ~ 5%, cold rolling carries out 3 ~ 5 times, annealing in process is carried out after each cold rolling, annealing temperature is 300 ~ 440 DEG C, and insulation 1 ~ 3h, the general working rate of cold rolling is 9% ~ 25%.

10. an Al-Ag-Cu-Mg acieral state solder, is characterized in that, this solder adopts the method according to any one of claim 3-9 to prepare.