CN113927203A - Zinc-aluminum brazing filler metal and preparation method thereof - Google Patents
Zinc-aluminum brazing filler metal and preparation method thereof Download PDFInfo
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- CN113927203A CN113927203A CN202111370946.3A CN202111370946A CN113927203A CN 113927203 A CN113927203 A CN 113927203A CN 202111370946 A CN202111370946 A CN 202111370946A CN 113927203 A CN113927203 A CN 113927203A
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 153
- 239000002184 metal Substances 0.000 title claims abstract description 153
- 229910000611 Zinc aluminium Inorganic materials 0.000 title claims abstract description 129
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 title claims abstract description 129
- 238000005219 brazing Methods 0.000 title claims abstract description 50
- 239000000945 filler Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- 238000006263 metalation reaction Methods 0.000 title description 2
- 238000000576 coating method Methods 0.000 claims abstract description 68
- 239000011248 coating agent Substances 0.000 claims abstract description 67
- 239000000463 material Substances 0.000 claims abstract description 59
- 229910000679 solder Inorganic materials 0.000 claims abstract description 56
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 48
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 45
- 239000011701 zinc Substances 0.000 claims abstract description 42
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 16
- 229910001297 Zn alloy Inorganic materials 0.000 claims abstract description 12
- 229910045601 alloy Inorganic materials 0.000 claims description 36
- 239000000956 alloy Substances 0.000 claims description 36
- 238000005096 rolling process Methods 0.000 claims description 28
- 239000000758 substrate Substances 0.000 claims description 24
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 238000002844 melting Methods 0.000 abstract description 10
- 230000008018 melting Effects 0.000 abstract description 10
- 238000005336 cracking Methods 0.000 abstract description 3
- 238000011065 in-situ storage Methods 0.000 abstract description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 13
- 229910052802 copper Inorganic materials 0.000 description 13
- 239000010949 copper Substances 0.000 description 13
- 239000011247 coating layer Substances 0.000 description 10
- 239000002131 composite material Substances 0.000 description 10
- 238000001125 extrusion Methods 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 7
- 229910007570 Zn-Al Inorganic materials 0.000 description 5
- 238000001938 differential scanning calorimetry curve Methods 0.000 description 5
- 238000001878 scanning electron micrograph Methods 0.000 description 4
- 229910002065 alloy metal Inorganic materials 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- UYFXWCIZFDKSTJ-UHFFFAOYSA-J aluminum;cesium;tetrafluoride Chemical compound [F-].[F-].[F-].[F-].[Al+3].[Cs+] UYFXWCIZFDKSTJ-UHFFFAOYSA-J 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
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
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
- B23K35/282—Zn as the principal constituent
-
- 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
- B23K35/40—Making wire or rods for soldering or welding
Abstract
The invention relates to a zinc-aluminum brazing filler metal and a preparation method thereof, and belongs to the technical field of brazing. The zinc-aluminum brazing filler metal comprises a metal base material and a metal coating, wherein the metal coating covers the metal base material; the metal base material is a pure zinc base material or a zinc alloy base material, and the mass percentage content of Zn element in the zinc alloy base material is not lower than 78%; the metal coating is a pure aluminum coating or an aluminum alloy coating, and the mass percentage of Al element in the aluminum alloy coating is not lower than 86.5%. According to the zinc-aluminum solder disclosed by the invention, zinc and part or all of aluminum in the solder are separately arranged at different parts, so that the plasticity and ductility of the zinc-aluminum solder can be improved, cracking generated in the processing process of the zinc-aluminum solder is reduced, and the yield of the zinc-aluminum solder is improved. The zinc-aluminum solder is formed in situ by specifically corroding aluminum or aluminum alloy with zinc or zinc alloy with low melting temperature in the brazing process.
Description
Technical Field
The invention relates to a zinc-aluminum brazing filler metal and a preparation method thereof, and belongs to the technical field of brazing.
Background
Copper and its alloy have excellent conductivity, thermal conductivity, corrosion resistance and higher intensity, widely used in refrigeration, electric power, electron, aerospace and other fields. However, in recent years, copper resources are increasingly in short supply, and the price of copper is high, which seriously hinders the application of copper in these fields. The storage amount of aluminum in the earth crust is very rich, the price of the aluminum is only about 30% of that of copper, and meanwhile, the aluminum has the advantages of good electric conductivity, heat conductivity, light weight and the like, and the aluminum is considered to be a more ideal copper substitute material. In actual production, copper and aluminum are often used together in order to fully utilize the performance advantages of copper and aluminum and to achieve the best technical economy. The copper-aluminum dissimilar metal connection has very important significance for saving rare copper resources and light weight design of parts.
Copper and aluminum are far apart in a chemical element periodic table, the physical and chemical properties of the copper and aluminum are greatly different, the difference of the physical and chemical properties inevitably has important influence on the solderability of copper-aluminum dissimilar metals, and the selection of a proper brazing material is very important for realizing the reliable connection between the copper and aluminum dissimilar metals. The eutectic point temperature of the zinc-aluminum brazing filler metal is 382 ℃, the melting temperature of the brazing filler metal can be controlled between 380 ℃ and 500 ℃ according to the difference of aluminum content, the melting temperature is obviously lower than that of the aluminum alloy base metal, and the problems of overburning and softening of the aluminum alloy base metal caused by overhigh melting temperature of the aluminum-silicon brazing filler metal are well solved. The close-packed hexagonal structure of the zinc-aluminum brazing filler metal has strong deformation anisotropy, so that the zinc-aluminum alloy has poor plasticity and ductility at normal temperature, the edge is easy to crack when being rolled at room temperature, and the yield is low. In addition, the zinc-aluminum brazing filler metal strip has low strength, the yield is less than 50% when the zinc-aluminum flux-cored brazing filler metal is formed by matching with a noncorrosive brazing flux cesium fluoroaluminate, and the yield is lower for flux-cored brazing filler metals containing copper, silicon and the like in the strip zinc-aluminum brazing filler metal.
Disclosure of Invention
The invention aims to provide a zinc-aluminum solder, which can improve the plasticity and the ductility of the zinc-aluminum solder.
The invention also provides a preparation method of the zinc-aluminum brazing filler metal.
In order to realize the purpose, the zinc-aluminum brazing filler metal adopts the technical scheme that:
a zinc-aluminum brazing filler metal comprises a metal substrate and a metal coating; the metal coating covers the metal substrate; the metal base material is a pure zinc base material or a zinc alloy base material, and the mass percentage content of Zn element in the zinc alloy base material is not lower than 78%; the metal coating is a pure aluminum coating or an aluminum alloy coating, and the mass percentage of Al element in the aluminum alloy coating is not lower than 86.5%.
According to the zinc-aluminum solder disclosed by the invention, zinc and part or all of aluminum in the solder are separately arranged at different parts, so that the plasticity and ductility of the zinc-aluminum solder can be improved, cracking generated in the processing process of the zinc-aluminum solder is reduced, and the yield and tensile strength of the zinc-aluminum solder are improved. Compared with the traditional banded zinc-aluminum solder, the production efficiency of the zinc-aluminum solder can be greatly improved. The zinc-aluminum solder of the invention is formed in situ by continuously corroding aluminum or aluminum alloy with zinc or zinc alloy with low melting temperature in the soldering process, and the components of the zinc-aluminum alloy or aluminum alloy can be adjusted according to the heating temperature of soldering and the adopted soldering flux.
Preferably, the aluminum alloy coating contains one or both of Si and Mn. Preferably, when the aluminum alloy coating contains Si, the mass percentage of Si element in the aluminum alloy coating is not higher than 12%. Preferably, when the aluminum alloy coating contains Mn, the mass percentage of Mn element in the aluminum alloy coating is not higher than 1.5%.
Preferably, the aluminum composite gold coating is a 3-series aluminum alloy coating or a 4-series aluminum alloy coating.
Preferably, the zinc alloy substrate is a zinc-aluminum alloy substrate. The mass percentage of Al element in the zinc-aluminum alloy base material is not higher than 22%.
It is understood that when the metal coating covers the metal substrate, it may cover a part of the surface of the metal substrate or may cover the entire surface of the metal substrate. Preferably, the metal coating layer coats the metal base material. The plastic rheology of zinc or zinc alloy can be controlled, cracking is reduced, and the plasticity and tensile strength of zinc or zinc alloy are improved by adopting the aluminum or aluminum alloy coating with good plasticity and ductility to coat the metal base material with poor plasticity and ductility.
Preferably, the metal substrate is in the form of a strip. When the metal base material is in a band shape, the ratio of the thickness of the metal coating layer to the thickness of the metal base material is preferably 0.01 to 0.02:0.01 to 1.00, and more preferably, the thickness of the metal coating layer is 0.01 to 0.20mm, and the thickness of the metal base material is 0.01 to 1.00 mm. For example, the thickness of the metal coating is 0.05-0.08 mm. The thickness of the metal substrate is 0.35-0.44 mm.
The preparation method of the zinc-aluminum brazing filler metal adopts the technical scheme that:
the preparation method of the zinc-aluminum brazing filler metal comprises the following steps: and covering the metal substrate with aluminum or aluminum alloy to form a metal coating.
The preparation method of the zinc-aluminum brazing filler metal is simple in process and convenient to popularize and apply.
Preferably, the aluminum or aluminum alloy coats the metal substrate.
The metal substrate is in a strip shape, and preferably, the covering comprises the following steps: the aluminum or aluminum alloy strip and the zinc or zinc-aluminum alloy strip are stacked and then rolled to enable the aluminum or aluminum alloy strip to wrap the zinc or zinc-aluminum alloy strip and form an overlapping structure. Further preferably, the width of the aluminium or aluminium alloy strip is greater than the width of the zinc or zinc-aluminium alloy strip; the rolling firstly leads the stacked aluminum or aluminum alloy strips to form a rectangular groove, the zinc or zinc-aluminum alloy strips are positioned at the bottom of the rectangular groove, then two side wings of the rectangular groove are bent towards the zinc or zinc-aluminum alloy strips, and a lap joint structure is formed after the zinc or zinc-aluminum alloy strips are wrapped; the preparation method also comprises the step of rolling again after the lapping structure is positioned on the rolling surface. For example, the width of the aluminium or aluminium alloy strip is not less than 2 times, for example ≧ 3.5 times, the width of the zinc or zinc-aluminium alloy strip. The metal coating prepared on the metal substrate by adopting the rolling method has the advantages of energy conservation and environmental protection.
Drawings
FIG. 1 is a schematic cross-sectional view of a zinc-aluminum solder of example 1;
FIG. 2 is a schematic view of a roll set used in blooming in example 6;
FIG. 3 is a scanning electron micrograph of an interface of the zinc-aluminum solder prepared in example 6;
FIG. 4 is a scanning electron micrograph of an interface of a zinc-aluminum solder prepared in example 7;
wherein, 1-metal substrate, 2-metal coating, 3-forming roller and 4-forming grooved roller.
Detailed Description
The technical solution of the present invention will be further described with reference to the following embodiments.
Example 1
The zinc-aluminum brazing filler metal of the embodiment is a banded zinc-aluminum brazing filler metal, the cross section of which is drum-shaped and is shown in figure 1, and the zinc-aluminum brazing filler metal comprises a metal base material 1 and a metal coating layer 2, wherein the metal base material 1 is coated by the metal coating layer 2; the metal substrate 1 is a strip-shaped pure zinc metal substrate with the thickness of 0.42 mm; the metal coating is a pure aluminum metal coating with the thickness of 0.06 mm.
The zinc-aluminum solder of this example was prepared by the method of example 6.
Example 2
The zinc-aluminum brazing filler metal is a banded zinc-aluminum brazing filler metal, the cross section of the banded zinc-aluminum brazing filler metal is drum-shaped, the zinc-aluminum brazing filler metal comprises a metal base material and a metal coating, and the metal base material is coated by the metal coating; the metal base material is a banded ZnAl2 metal base material, the thickness of the metal base material is 0.44mm, and the mass percentage of Zn element in the metal base material is 98%; the metal coating is a 3003 aluminum alloy metal coating with the thickness of 0.05 mm.
The zinc-aluminum solder of this example was prepared by the method of example 7.
Example 3
The zinc-aluminum brazing filler metal is a banded zinc-aluminum brazing filler metal, the cross section of the banded zinc-aluminum brazing filler metal is drum-shaped, the zinc-aluminum brazing filler metal comprises a metal base material and a metal coating, and the metal base material is coated by the metal coating; the metal base material is a banded ZnAl15 metal base material, the thickness of the metal base material is 0.36mm, and the mass percentage of Zn element in the metal base material is 85%; the metal coating is 4047 aluminum alloy metal coating, and the thickness is 0.08 mm.
The zinc-aluminum solder of this example was prepared by the method of example 8.
Example 4
The zinc-aluminum brazing filler metal is a banded zinc-aluminum brazing filler metal, the cross section of the banded zinc-aluminum brazing filler metal is drum-shaped, the zinc-aluminum brazing filler metal comprises a metal base material and a metal coating, and the metal base material is coated by the metal coating; the metal base material is a banded ZnAl0.36 alloy metal base material, the thickness is 0.35mm, and the mass percentage content of Al element in the metal base material is 0.36%; the metal coating is 4047 aluminum alloy metal coating, and the thickness is 0.08 mm.
The zinc-aluminum solder of this example was prepared by the method of example 9.
Example 5
The zinc-aluminum brazing filler metal is a banded zinc-aluminum brazing filler metal, the cross section of the banded zinc-aluminum brazing filler metal is drum-shaped, the zinc-aluminum brazing filler metal comprises a metal base material and a metal coating, and the metal base material is coated by the metal coating; the metal base material is a banded ZnAl5 alloy metal base material, the thickness of the metal base material is 0.36mm, and the mass percentage of Al element in the metal base material is 5%; the metal coating is 4047 aluminum alloy metal coating, and the thickness is 0.07 mm.
The zinc-aluminum solder of this example was prepared by the method of example 10.
In other embodiments of the zinc-aluminum solder of the present invention, the zinc-aluminum solder may also be a layered structure, specifically including a first metal coating layer, a strip-shaped metal substrate, and a second metal coating layer, which are sequentially arranged, where the metal substrate is a znal0.36 alloy metal substrate, and has a thickness of 0.44 mm; the first metal coating and the second metal coating respectively completely cover two side surfaces of the strip-shaped metal base material, and the first metal coating and the second metal coating are 4047 aluminum alloy metal coatings with the thickness of 0.05 mm.
Example 6
The preparation method of the zinc-aluminum brazing filler metal comprises the following steps:
1) taking a pure aluminum strip with the thickness multiplied by the width of 0.2mm multiplied by 14mm and a pure zinc strip with the thickness multiplied by the width of 1.0mm multiplied by 4.0mm, stacking the pure zinc strips on the pure aluminum strip for preliminary rolling to obtain a preliminary rolling material;
the roller combination adopted in the primary rolling process is shown in figure 2 and comprises a forming roller 3 and a forming groove roller 4 in clearance fit with the forming roller 3, wherein a rectangular groove with symmetrical wings is formed in the forming groove roller 4 by a pure aluminum strip 2 in the rolling process, and the zinc or zinc-aluminum alloy strip 2 is tightly combined with the groove bottom of the rectangular groove;
2) then, rolling two wings of the rectangular groove-shaped initial rolling material obtained in the step 1) by using side rollers, wherein the angles between the two wings of the rectangular groove and the bottom of the groove are continuously reduced under the action of the side rollers, and the zinc or zinc-aluminum alloy strip is gradually wrapped to form a lap joint structure;
3) and (3) enabling the lap joint structure of the pure zinc strip wrapped by the pure aluminum strip to be upward on the surface to be rolled, and performing multi-pass rolling on the composite strip to form a Zn-Al composite strip with an aluminum coating layer of 0.06mm and a zinc base material of 0.42mm, thus obtaining the zinc-Al composite strip.
Compared with the zinc-aluminum alloy strip which is prepared by traditional extrusion and rolling and has the same element composition, the preparation method of the strip-shaped zinc-aluminum solder disclosed by the embodiment has the advantages that the yield is improved by 93.4%, the production efficiency is improved by 76.3%, and the melting temperature is 381.7-462.6 ℃ when a DSC curve of the zinc-aluminum solder is measured by adopting a model STA449F3 comprehensive thermal analyzer produced by Germany NETZSCH company. The tensile strength of the zinc-aluminum solder is tested, and the tensile strength of the zinc-aluminum solder is 302.3MPa, which is higher than that of a zinc-aluminum alloy strip (260.4MPa) which is produced by the traditional extrusion and rolling process, has the same element composition and is 0.48mm thick.
The scanning electron micrograph of the zinc-aluminum composite interface of the zinc-aluminum brazing filler metal prepared in the embodiment is analyzed, and the result is shown in fig. 3, and it can be seen from fig. 3 that the bonding surface of the metal base material and the metal coating is good, and the zinc-aluminum brazing filler metal has no defects such as air holes and inclusions.
Example 7
The preparation method of the zinc-aluminum solder of the embodiment is different from the preparation method of the embodiment 6 only in the steps 1) and 3):
the preparation method of the embodiment replaces the pure aluminum strip in the step 1) of the embodiment 6 with a 3003 aluminum alloy strip, replaces the pure zinc strip with a ZnAl2 alloy strip, and forms the Zn-Al composite strip by multi-pass rolling in the step 3) with the aluminum coating thickness of 0.05mm and the zinc base thickness of 0.44 mm.
Compared with the zinc-aluminum alloy strip which is prepared by traditional extrusion and rolling and has the same element composition, the preparation method of the zinc-aluminum solder provided by the embodiment has the advantages that the yield is improved by 96.7%, the production efficiency is improved by 56.9%, and the DSC curve of the zinc-aluminum solder is measured by adopting a model STA449F3 comprehensive thermal analyzer produced by Germany NETZSCH company, and the melting temperature is measured to be 390.2-468.7 ℃. The tensile strength of the zinc-aluminum solder is tested, and the tensile strength of the zinc-aluminum solder is 290.7MPa, which is higher than that of a zinc-aluminum alloy strip (254.9MPa) which is produced by the traditional extrusion and rolling process and has the same element composition and the thickness of 0.49 mm.
The scanning electron micrograph of the zinc-aluminum composite interface of the zinc-aluminum brazing filler metal prepared in the embodiment is analyzed, and the result is shown in fig. 4, and it can be seen from fig. 4 that the bonding surface of the metal base material and the metal coating is good, and the zinc-aluminum brazing filler metal has no defects such as air holes and inclusions.
Example 8
The preparation method of the zinc-aluminum solder of the embodiment is different from the preparation method of the embodiment 6 only in the steps 1) and 3): the preparation method of the embodiment replaces the pure aluminum strip in the step 1) of the embodiment 6 with a 4047 aluminum alloy strip, replaces the pure zinc strip with a ZnAl15 alloy strip, and forms the Zn-Al composite strip by multi-pass rolling in the step 3) with the aluminum coating thickness of 0.08mm and the zinc base thickness of 0.36 mm.
Compared with the traditional extrusion and rolling preparation of the zinc-aluminum alloy strip with the same element composition, the preparation method of the zinc-aluminum solder provided by the embodiment has the advantages that the yield is improved by 91.8%, the production efficiency is improved by 46.4%, and the melting temperature is 373.4-448.2 ℃ when the DSC curve of the zinc-aluminum solder is measured by adopting a model STA449F3 comprehensive thermal analyzer produced by Germany NETZSCH company. The tensile strength of the zinc-aluminum solder is tested, and the tensile strength of the zinc-aluminum solder is 312.4MPa, which is higher than that of a zinc-aluminum alloy belt (273.5MPa) which is produced by the traditional extrusion and rolling process and has the same element composition and the thickness of 0.44 mm.
Example 9
The preparation method of the zinc-aluminum solder of the embodiment is different from the preparation method of the embodiment 6 only in the steps 1) and 3): in the preparation method of the embodiment, the pure aluminum strip in the step 1) of the embodiment 6 is replaced by a 4047 aluminum alloy strip, the pure zinc strip is replaced by a ZnAl0.36 alloy strip, and the thickness of an aluminum coating layer and the thickness of a zinc base material in the Zn-Al composite strip formed by multi-pass rolling in the step 3) are respectively 0.08mm and 0.35 mm.
Compared with the zinc-aluminum alloy strip with the same element composition prepared by traditional extrusion and rolling, the preparation method of the zinc-aluminum solder disclosed by the embodiment has the advantages that the yield is improved by 92.4%, the production efficiency is improved by 49.7%, and the DSC curve of the zinc-aluminum solder is measured by adopting a model STA449F3 comprehensive thermal analyzer produced by Germany NETZSCH company, and the melting temperature is measured to be 394.8-459.7 ℃. The tensile strength of the zinc-aluminum solder is 317.8MPa, which is higher than that of a zinc-aluminum alloy strip (274.9MPa) which is produced by the traditional extrusion and rolling process, has the same element composition and is 0.43mm thick.
Example 10
The preparation method of the zinc-aluminum solder of the embodiment is different from the preparation method of the embodiment 6 only in the steps 1) and 3): the preparation method of the embodiment replaces the pure aluminum strip in the step 1) of the embodiment 6 with a 4047 aluminum alloy strip, replaces the pure zinc strip with a ZnAl5 alloy strip, and forms the Zn-Al composite strip by multi-pass rolling in the step 3) with the aluminum coating layer with the thickness of 0.07mm and the zinc base material with the thickness of 0.36 mm.
Compared with the zinc-aluminum alloy strip with the same element composition prepared by traditional extrusion and rolling, the preparation method of the zinc-aluminum solder disclosed by the embodiment has the advantages that the yield is improved by 97.6%, the production efficiency is improved by 44.3%, and the DSC curve of the zinc-aluminum solder is measured by adopting a model STA449F3 comprehensive thermal analyzer produced by Germany NETZSCH company, and the melting temperature is 386.7-440.5 ℃. The tensile strength of the zinc-aluminum solder is 306.1MPa, which is higher than that of a zinc-aluminum alloy belt (263.4MPa) which is produced by the traditional extrusion and rolling process, has the same element composition and is 0.43mm thick.
Claims (10)
1. A zinc-aluminum brazing filler metal is characterized in that: comprises a metal substrate and a metal coating; the metal coating covers the metal substrate; the metal base material is a pure zinc base material or a zinc alloy base material, and the mass percentage content of Zn element in the zinc alloy base material is not lower than 78%; the metal coating is a pure aluminum coating or an aluminum alloy coating, and the mass percentage of Al element in the aluminum alloy coating is not lower than 86.5%.
2. The zinc-aluminum solder according to claim 1, characterized in that: the aluminum alloy coating contains one or two of Si and Mn; when the aluminum alloy coating contains Si, the mass percentage content of Si element in the aluminum alloy coating is not higher than 12%; when the aluminum alloy coating contains Mn, the mass percentage of Mn element in the aluminum alloy coating is not higher than 1.5%.
3. The zinc-aluminum solder according to claim 2, characterized in that: the aluminum alloy coating is a 3-series or 4-series aluminum alloy coating.
4. The zinc-aluminum solder according to claim 1, characterized in that: the zinc alloy base material is a zinc-aluminum alloy base material.
5. The zinc-aluminum solder according to claim 4, characterized in that: the mass percentage of Al element in the zinc-aluminum alloy base material is not higher than 22%.
6. The zinc-aluminum solder according to claim 3, characterized in that: the thickness of the metal coating is 0.01-0.20 mm, and the thickness of the metal substrate is 0.01-1.00 mm.
7. A method for preparing a zinc-aluminium brazing filler metal according to any one of claims 1 to 6, characterized in that: the method comprises the following steps: and covering the metal substrate with aluminum or aluminum alloy to form a metal coating.
8. The method for preparing a zinc-aluminum solder according to claim 7, characterized in that: the aluminum or aluminum alloy coats the metal substrate.
9. The method for preparing a zinc-aluminum solder according to claim 7, characterized in that: the metal base material is in a strip shape; the covering comprises the following steps: the aluminum or aluminum alloy strip and the zinc or zinc-aluminum alloy strip are stacked and then rolled to enable the aluminum or aluminum alloy strip to wrap the zinc or zinc-aluminum alloy strip and form an overlapping structure.
10. The method for preparing a zinc-aluminum solder according to claim 9, characterized in that: the width of the aluminum or aluminum alloy strip is larger than that of the zinc or zinc-aluminum alloy strip; the rolling firstly leads the stacked aluminum or aluminum alloy strips to form a rectangular groove, the zinc or zinc-aluminum alloy strips are positioned at the bottom of the rectangular groove, then two side wings of the rectangular groove are bent towards the zinc or zinc-aluminum alloy strips, and a lap joint structure is formed after the zinc or zinc-aluminum alloy strips are wrapped; the preparation method also comprises the step of rolling again after the lapping structure is positioned on the rolling surface.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114918573A (en) * | 2022-05-19 | 2022-08-19 | 郑州机械研究所有限公司 | Zinc-aluminum coating brazing filler metal ring, preparation method thereof and preparation device of coating brazing filler metal ring |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB487950A (en) * | 1936-12-31 | 1938-06-29 | Otto Kamps | Improvements in or relating to the manufacture of composite wires, rods or bars |
| US3177579A (en) * | 1959-09-17 | 1965-04-13 | Reynolds Metals Co | Process for manufacture of a zinc-clad aluminum wire |
| CN1832825A (en) * | 2003-08-29 | 2006-09-13 | 克里斯铝轧制品有限公司 | High strength aluminium alloy brazing sheet, brazed assembly and method for producing the same |
| JP2011224598A (en) * | 2010-04-16 | 2011-11-10 | Hitachi Cable Ltd | High heat resistant bonding material and semiconductor device using the same |
| CN102886617A (en) * | 2010-11-25 | 2013-01-23 | 卢卡斯米尔霍特公司 | Brazing material |
| CN104070064A (en) * | 2014-06-05 | 2014-10-01 | 宁波宇能复合铜带有限公司 | Process for cold compound rolling of wrapping type metal strip |
| CN113579555A (en) * | 2021-06-30 | 2021-11-02 | 郑州机械研究所有限公司 | Zinc-aluminum flux-cored brazing filler metal for copper-aluminum brazing and preparation method thereof |
-
2021
- 2021-11-18 CN CN202111370946.3A patent/CN113927203A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB487950A (en) * | 1936-12-31 | 1938-06-29 | Otto Kamps | Improvements in or relating to the manufacture of composite wires, rods or bars |
| US3177579A (en) * | 1959-09-17 | 1965-04-13 | Reynolds Metals Co | Process for manufacture of a zinc-clad aluminum wire |
| CN1832825A (en) * | 2003-08-29 | 2006-09-13 | 克里斯铝轧制品有限公司 | High strength aluminium alloy brazing sheet, brazed assembly and method for producing the same |
| JP2011224598A (en) * | 2010-04-16 | 2011-11-10 | Hitachi Cable Ltd | High heat resistant bonding material and semiconductor device using the same |
| CN102886617A (en) * | 2010-11-25 | 2013-01-23 | 卢卡斯米尔霍特公司 | Brazing material |
| CN104070064A (en) * | 2014-06-05 | 2014-10-01 | 宁波宇能复合铜带有限公司 | Process for cold compound rolling of wrapping type metal strip |
| CN113579555A (en) * | 2021-06-30 | 2021-11-02 | 郑州机械研究所有限公司 | Zinc-aluminum flux-cored brazing filler metal for copper-aluminum brazing and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114918573A (en) * | 2022-05-19 | 2022-08-19 | 郑州机械研究所有限公司 | Zinc-aluminum coating brazing filler metal ring, preparation method thereof and preparation device of coating brazing filler metal ring |
| CN114918573B (en) * | 2022-05-19 | 2023-09-26 | 郑州机械研究所有限公司 | Zinc-aluminum coating brazing filler metal ring and preparation method thereof |
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Application publication date: 20220114 |