CN117263528A - Laser sealing method for glass and stainless steel by adding foam nickel as transition layer - Google Patents
Laser sealing method for glass and stainless steel by adding foam nickel as transition layer Download PDFInfo
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- CN117263528A CN117263528A CN202311074427.1A CN202311074427A CN117263528A CN 117263528 A CN117263528 A CN 117263528A CN 202311074427 A CN202311074427 A CN 202311074427A CN 117263528 A CN117263528 A CN 117263528A
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- glass
- stainless steel
- sealed
- solder
- foam
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- 238000007789 sealing Methods 0.000 title claims abstract description 72
- 239000011521 glass Substances 0.000 title claims abstract description 66
- 239000010935 stainless steel Substances 0.000 title claims abstract description 66
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 66
- 239000006260 foam Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000007704 transition Effects 0.000 title claims abstract description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title abstract description 77
- 229910052759 nickel Inorganic materials 0.000 title abstract description 12
- 229910000679 solder Inorganic materials 0.000 claims abstract description 43
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000005507 spraying Methods 0.000 claims abstract description 12
- 238000003466 welding Methods 0.000 claims abstract description 12
- 230000004907 flux Effects 0.000 claims abstract description 8
- 229910017755 Cu-Sn Inorganic materials 0.000 claims description 28
- 229910017927 Cu—Sn Inorganic materials 0.000 claims description 28
- 239000011888 foil Substances 0.000 claims description 23
- 239000000843 powder Substances 0.000 claims description 21
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 238000007605 air drying Methods 0.000 claims description 3
- 239000012298 atmosphere Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005238 degreasing Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000035882 stress Effects 0.000 abstract description 8
- 230000035939 shock Effects 0.000 abstract description 4
- 230000008646 thermal stress Effects 0.000 abstract description 3
- 230000000977 initiatory effect Effects 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 33
- 239000002184 metal Substances 0.000 description 29
- 229910052751 metal Inorganic materials 0.000 description 29
- 229910000765 intermetallic Inorganic materials 0.000 description 17
- 238000005219 brazing Methods 0.000 description 11
- 239000000945 filler Substances 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000004321 preservation Methods 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 229910002482 Cu–Ni Inorganic materials 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910017944 Ag—Cu Inorganic materials 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000009661 fatigue test Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000005394 sealing glass Substances 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 238000005382 thermal cycling Methods 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229910000833 kovar Inorganic materials 0.000 description 2
- 239000002932 luster Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical group [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000004021 metal welding Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/24—Fusion seal compositions being frit compositions having non-frit additions, i.e. for use as seals between dissimilar materials, e.g. glass and metal; Glass solders
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention relates to a laser sealing method for glass and stainless steel by adding foam nickel as a transition layer. The method of the invention comprises the following steps: setting a processing track according to the sizes and shapes of glass to be sealed and stainless steel to be sealed; uniformly spraying or placing solder on one side of stainless steel to be sealed, and spraying or placing foam nickel on the solder; spraying or placing solder on the foam nickel; placing the glass to be sealed on stainless steel provided with foam nickel and solder, and ensuring that the glass to be sealed is in close contact with the stainless steel to form a body to be sealed; and clamping the to-be-sealed body, and carrying out laser irradiation on the welding flux at the junction of the glass and the stainless steel according to the set processing track to obtain the glass-stainless steel sealing body. The invention effectively reduces the stress release problem and crack initiation sensitivity between the glass and the stainless steel, reduces the thermal stress and interface pressure between the glass and the stainless steel, and improves the tolerance limits of the glass-stainless steel sealing body on thermal shock resistance and thermal cycle.
Description
Technical Field
The invention relates to the technical field of sealing of heterogeneous materials, in particular to a laser sealing method for glass and stainless steel by adding foam nickel (Ni) as a transition layer.
Background
The glass-metal sealing body has a plurality of important performances, is an important key part in the modern manufacturing industry, and plays a very important role in national defense, military industry, daily production and life. The sealing of glass and metal is realized by bonding and sealing glass with sealing strips and glass strips. Or oxidizing the metal surface to form an oxide film, and then preserving heat for a long time in a heat preserving furnace under the high temperature condition to realize the sealing of glass and metal. Because of high temperature and long heat preservation time during sealing, the glass and metal performances are damaged, and the production efficiency and quality are very inconvenient to control. The invention patent with the application number of CN201611206465.8 discloses a laser sealing method and a sealing body of glass and kovar alloy, and the sealing is realized on the basis of introducing a transition layer between the glass and the metal. However, the problem that the glass-metal connection joint generates huge residual thermal stress after welding cannot be completely solved, so that the joint strength cannot reach the preset standard. Therefore, there is still a need for a convenient and reliable sealing means for sealing glass to stainless steel.
Ag-Cu-Ni or Ag-Cu is a type of solder commonly used in sealing glass (ceramic) to metal, but brittle intermetallic compounds are easily generated during sealing, so that under the effect of thermal cycling, the brittle intermetallic compounds rapidly become thinner and begin to become non-uniform and discontinuous. Meanwhile, the glass and metal sealing body obtained by the conventional Ag-Cu or Ag-Cu-Ni solder has larger stress, and is only suitable for working at normal temperature, otherwise, cracks are often caused. Therefore, the service performance of the glass and metal sealing body is improved, especially under the condition of large temperature difference, the diffusion of tissue elements is essential, the formation of brittle intermetallic compounds is prevented, and stress damage caused by the difference of thermal expansion coefficients of materials is less. Thus, the mechanical property and the thermal stability of service under the thermal cycle condition can be improved.
In the solder, the solder is composed of a large amount of living mattersThe sex element is widely used for brazing metal and glass (or ceramic), such as Cu-based brazing filler metal, ag-based brazing filler metal, ni brazing filler metal and the like. The element Ni can react with glass (or ceramic) to form a reaction layer with metal characteristics, so that good combination between the solder and the glass is realized. However, there are still significant challenges in preparing glass to metal seals that can be serviced under conditions of relatively large temperature fluctuations. A very detrimental residual stress concentration is formed due to the difference in thermal expansion coefficients between glass and metal. It is well known that thermal cycling has a very large effect on residual stress. When the temperature changes drastically, the residual stress increases rapidly. High residual stresses become a source of cracks and a path for crack propagation. Thereby deteriorating the mechanical properties of the sealing joint and causing failure of the sealing joint. Meanwhile, the active elements have strong tendency of forming brittle intermetallic compounds with the related elements of the base material, and the elements like Fe, ni and the like are very easy to form the brittle intermetallic compounds. As found in the study, in Al 2 O 3 Brittle Fe is extremely easily formed when brazing/Ag-Cu-Ni/Kovar 2 Ni and Ni 3 The formation of Ni intermetallic compounds, which are brittle intermetallic compounds, is very detrimental to the mechanical properties of the joint and even directly leads to failure of the joint. Losses due to the formation of brittle intermetallic compounds are often further exacerbated under thermal shock or temperature cycling conditions.
From the above, it is known that the use of an interlayer to relieve stress and reduce the formation of brittle intermetallic compounds is an effective solution to improve the stability of glass and metal seals under thermal cycling loads. Clearly, optimizing the composition of the braze compound, forming the gradient material, and reducing or preventing the formation of brittle intermetallic compounds is an excellent solution.
Since Ni foam is a compound that is very easy to form with glass and has metallic properties, ni foam is also very easy to form brittle intermetallic compounds with Fe, ni, etc. in metal, this makes the ag—cu—ni braze commonly used form brittle intermetallic compounds in glass and metal seals. In order to prevent the formation of brittle intermetallic compounds, a brazing filler metal layer is added between the foam Ni and the metal to form a barrier layer, so that brittle intermetallic compounds are not easy or can not be formed between the foam Ni and the base metal due to the existence of the barrier layer, and the heat-resistant cyclic load resistance of the glass-metal sealing body can be further improved. Since the conventional brazing filler metal is composed of Ag-Cu or Ag-Cu-Ni directly, the brazing filler metal is a compound with metal characteristics, and has the advantages of being capable of being combined with glass or ceramic, but inevitably forming brittle intermetallic compounds with Fe and Ni in a base metal.
Disclosure of Invention
In order to solve the problems, the invention provides a laser sealing method for realizing glass and stainless steel by adding foam nickel as a transition layer, which can effectively improve the strength of a sealing joint between glass and stainless steel.
The invention is realized by the following technical scheme:
the first object of the invention is to provide a laser sealing method for glass and stainless steel by adding foam Ni as a transition layer, comprising the following steps,
s1: setting a processing track according to the sizes and shapes of glass to be sealed and stainless steel to be sealed;
s2: uniformly spraying or placing solder on one side of stainless steel to be sealed, and spraying or placing foam Ni on the solder; spraying or placing solder on the foam Ni;
placing the glass to be sealed on stainless steel provided with foam Ni and solder, and ensuring that the glass to be sealed is in close contact with the stainless steel to form a body to be sealed;
the solder is Ag-Cu-Sn powder or Ag-Cu-Sn foil, and the Ag-Cu-Sn powder or Ag-Cu-Sn foil comprises the following components in percentage by atom: ag-42.44at% Cu-7.56at% Sn; the foam Ni is foam Ni powder or foam Ni foil;
s3: and (3) clamping the to-be-sealed body obtained in the step (S2), and carrying out laser irradiation on the welding flux at the junction of the glass and the stainless steel according to the processing track set in the step (S1) to obtain the glass-stainless steel sealing body.
In one embodiment of the present invention, in step S1, the glass to be sealed and the stainless steel to be sealed are obtained by the following pretreatment:
degreasing and deoiling the stainless steel to be sealed, and then oxidizing;
and cleaning the glass to be sealed with clear water, and then cooling and air-drying.
In one embodiment of the present invention, in step S2, the solder has a thickness of 20 μm to 100 μm.
In one embodiment of the present invention, in step S2, the Ag-Cu-Sn powder has a particle size of 5 μm to 50 μm in order to ensure uniform laying.
In one embodiment of the present invention, in step S2, when the solder is Ag-Cu-Sn powder, a foam Ni foil is placed on the solder;
when the solder is Ag-Cu-Sn foil, placing foam Ni foil or spraying foam Ni powder on the solder.
I.e. Ag-Cu-Sn and foamed Ni, can be both foil, but not powder, at the same time when placed.
The Ag-Cu-Sn powder or the Ag-Cu-Sn foil and the foam Ni have metallic luster, and oxidation treatment is not needed.
In one embodiment of the present invention, in step S2, the thickness of the foamed Ni is 10 μm to 30 μm.
In one embodiment of the invention, the foamed Ni powder has a particle size of less than 10 μm and a purity of greater than 99.7%.
In one embodiment of the present invention, in step S3, the wavelength of the laser is 800nm to 1100nm.
In one embodiment of the present invention, in step S3, the parameters of the laser irradiation are: laser scanning speed 80mm min -1 -160mm·min -1 The laser power is 80W-160W, the pulse width is 1.5ms-3.0ms, the frequency is 5Hz-10 Hz, and the scanning times are 1-3 tracks.
In one embodiment of the present invention, in step S3, the laser irradiation is performed in a protective atmosphere. Specifically, the protective atmosphere is helium or argon, preferably argon.
The second object of the invention is to provide a glass-stainless steel seal produced by the laser sealing method. The glass-stainless steel seal body comprises glass, stainless steel, welding flux and foam Ni, wherein the welding flux and the foam Ni are arranged between the glass and the stainless steel for sealing.
The brazing filler metal used in the present invention is composed of Ag-Cu-Sn, while the foamed Ni is used as a single brazing filler metal welding layer, and Ag-Cu-Sn forms a barrier layer between the metal base and the foamed Ni to avoid the formation of brittle intermetallic compounds between the foamed Ni and the base. Meanwhile, the atomic radius of Sn is very similar to that of Fe, so that the Sn is extremely soluble in each other, brittle phases are not formed, and brittle intermetallic compounds are not easily formed between Sn and foam Ni and between Sn and glass, but exist in a solid solution mode. Therefore, the Ag-Cu-Sn is used as the brazing filler metal and the foam Ni is used as the transition layer to seal the glass and the stainless steel, so that the performance of the stainless steel and the glass sealing body, particularly the thermal shock resistance, can be further improved.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the invention provides a laser sealing method for glass and stainless steel by adding foam nickel as a transition layer. In the sealing process, foam Ni is introduced as a functional gradient material while solder is introduced into glass and stainless steel, so that the problems of mismatching caused by overlarge difference of thermal expansion coefficients between the glass and the stainless steel and initiation sensitivity of cracks caused by difference of physical properties are effectively reduced, the thermal stress and interface pressure between the glass and the stainless steel are reduced, and the tolerance limits of thermal shock and thermal circulation of a sealing body of the stainless steel and the glass are improved.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings, in which
FIG. 1 is a schematic view of a material combination of the closure of the present invention;
description of the specification reference numerals: 1. stainless steel plate; 2. solder; 3. foam Ni; 4. glass.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
Example 1
The embodiment provides a laser sealing method for glass and stainless steel by adding foam Ni as a transition layer, which comprises the following specific steps:
s1: taking a window glass sample with the length of 8mm multiplied by 20mm multiplied by 4mm as glass to be sealed, taking a stainless steel plate with the length of 10mm multiplied by 25mm multiplied by 1.5mm as stainless steel to be sealed, setting a processing track, and preparing a welding fixture;
s2: degreasing and deoiling the stainless steel to be sealed, and then oxidizing; cleaning the glass to be sealed with clear water, and then cooling and air-drying;
s3: taking an Ag-Cu-Sn foil with the thickness of about 20 mu m as solder, placing the solder on one side of stainless steel to be sealed, and spraying foam Ni powder with the thickness of 11 mu m on the solder; wherein the Ag-Cu-Sn foil comprises the following components in atom percent: ag-42.44at% Cu-7.56at% Sn, and has metallic luster, and no special treatment is needed; the purity of the foam Ni powder is more than 99.7%;
s4: placing the glass to be sealed on stainless steel provided with foam Ni and solder, and ensuring that the glass to be sealed is in close contact with the stainless steel to form a body to be sealed; placing a layer of Ag-Cu-Sn foil with the thickness of about 20 mu m on the foam Ni powder;
s5, performing S5; the welding fixture clamps the body to be sealed in the step S4 according to the requirement, and laser sealing preparation is carried out;
s6: adopting a fiber laser with the wavelength of 1064nm, and setting laser processing parameters of the fiber laser as follows: laser scanning speed 100mm min -1 The laser power is 110W, the pulse width is 1.5ms, the frequency is 7Hz, and the scanning times are 1-3 tracks;
the laser device sets a processing track according to the step S1: the scanning length is 78mm (X direction) and 18mm (Y direction), the welding flux at the junction of the glass and the stainless steel is irradiated with laser at the position 2mm away from the welding flux in the argon atmosphere, and the welding flux plays a role of glue, so that a glass-stainless steel sealing body is prepared;
s7: and (5) dismantling the welding clamp to finish the whole laser sealing operation flow.
The test shows that the shearing strength of the glass-stainless steel sealing body obtained by the laser sealing method can reach 30MPa.
And (3) taking the sealing body without the foam Ni layer as a comparison, and performing a thermal fatigue experiment, wherein the experimental method is that the sealing body with the foam Ni layer added and the sealing body without the foam Ni layer added are simultaneously placed into a heat preservation furnace for heat preservation, after heat preservation is carried out for 12min, the sealing body is taken out and placed at normal temperature, and is blown to cool by a fan for 20 min, and after the temperature of the sealing body becomes the room temperature, the sealing body is placed into the furnace for heat preservation for 12min, and the process is repeated. Wherein after each 5 times of the process, the sealing body at room temperature is subjected to one-time coloring inspection to check whether cracks exist.
The results show that under the conditions of this example, no cracks were present in the Ni foam layer added and the seal failed at 3 cycles. And the foam Ni layer is added, so that cracks do not appear in 3 cycles, and cracks appear in 8 th cycle.
Example 2
The present example provides a laser sealing method for glass and stainless steel by adding foamed Ni as a transition layer, similar to the method of example 1, except that:
the thickness of the adopted Ag-Cu-Sn solder is 32 mu m, the solder is in a form of powder, a foam Ni foil is placed on the powder, the thickness of the foam Ni foil is 15 mu m, an Nd-YAG type laser with the wavelength of 1000nm is adopted, the processing track set by the Nd-YAG type laser is 78mm (X direction) and 18mm (Y direction) in scanning length, and the laser parameters are set as follows: laser scanning speed 40mm min -1 The laser power was 130W, the pulse width was 2.5ms, the frequency was 10Hz, the number of scans was 1-3 passes, and the laser sealing operation was performed on glass and stainless steel at a distance of 1mm from the solder.
The test shows that the shearing strength of the glass-stainless steel sealing body obtained by the laser sealing method can reach 37MPa.
The thermal fatigue test was performed by using a sealing body without the foamed Ni layer as a comparison, and the result shows that under the conditions of this example, no cracks were formed in the foamed Ni layer and the sealing body failed at the time of 8 cycles. And the foam Ni layer is added, so that cracks do not appear in 13 cycles, and cracks appear in 17 cycles.
Example 3
The present example provides a laser sealing method for glass and stainless steel by adding foamed Ni as a transition layer, similar to the method of example 1, except that:
the thickness of the adopted Ag-Cu-Sn solder is 45 mu m, the Ag-Cu-Sn is in the form of foil, and a layer of foam Ni foil is covered on the Ag-Cu-Sn solder, and the thickness of the foam Ni foil is 20 mu m. A semiconductor laser having a wavelength of 940nm was used, the processing track set for the semiconductor laser was 78mm (X direction) and 18mm (Y direction) in scanning length, and the laser parameters were set as: laser scanning speed 160mm min -1 Laser power 160W, pulse width 1.8ms, frequency 8Hz, number of scans 1-3, and laser sealing operation of glass and stainless steel at a distance of 3mm from the solder.
The test shows that the shearing strength of the glass-stainless steel sealing body obtained by the laser sealing method can reach 44MPa.
The thermal fatigue test was conducted by taking the seal without the foamed Ni layer as a comparison, and the result showed that no cracks were formed in the foamed Ni layer and the seal failed under the conditions of this example at 17 cycles. And the foamed Ni layer was added without cracks at 21 cycles, and only at 27 cycles.
Example 4
The present example provides a laser sealing method for glass and stainless steel by adding foamed Ni as a transition layer, similar to the method of example 1, except that:
collectedThe Ag-Cu-Sn composition of the solder used was 70 μm thick, the Ag-Cu-Sn was in the form of powder, and a foam Ni foil was covered thereon, and 25 μm thick, a semiconductor laser having a wavelength of 810nm was used, which set processing tracks of 78mm (X direction) and 18mm (Y direction) in scanning length, and laser parameters were set as: laser scanning speed is 163 mm/min -1 Laser power 161W, pulse width 1.9ms, frequency 9Hz, number of scans 1-3, and laser sealing operation of glass and stainless steel at a distance of 3mm from the solder.
The test shows that the shearing strength of the glass-stainless steel sealing body obtained by the laser sealing method can reach 46MPa.
The thermal fatigue test was performed by using a sealing body without the foamed Ni layer as a comparison, and the result shows that under the conditions of this example, no cracks were formed in the foamed Ni layer and the sealing body failed at 22 cycles. And the foam Ni layer is added, so that cracks do not appear at 27 times of cycles, and only appear at 32 times of cycles.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (10)
1. A method for realizing laser sealing of glass and stainless steel by adding foam Ni as a transition layer is characterized by comprising the following steps,
s1: setting a processing track according to the sizes and shapes of glass to be sealed and stainless steel to be sealed;
s2: uniformly spraying or placing solder on one side of stainless steel to be sealed, and spraying or placing foam Ni on the solder; spraying or placing solder on the foam Ni;
placing the glass to be sealed on stainless steel provided with foam Ni and solder, and ensuring that the glass to be sealed is in close contact with the stainless steel to form a body to be sealed;
the solder is Ag-Cu-Sn powder or Ag-Cu-Sn foil, and the Ag-Cu-Sn powder or Ag-Cu-Sn foil comprises the following components in percentage by atom: ag-42.44at% Cu-7.56at% Sn; the foam Ni is foam Ni powder or foam Ni foil;
s3: and (3) clamping the to-be-sealed body obtained in the step (S2), and carrying out laser irradiation on the welding flux at the junction of the glass and the stainless steel according to the processing track set in the step (S1) to obtain the glass-stainless steel sealing body.
2. The laser sealing method according to claim 1, wherein in step S1, the glass to be sealed and the stainless steel to be sealed are obtained by the following pretreatment:
degreasing and deoiling the stainless steel to be sealed, and then oxidizing;
and cleaning the glass to be sealed with clear water, and then cooling and air-drying.
3. The laser sealing method according to claim 1, wherein in step S2, the thickness of the solder is 20 μm to 100 μm.
4. The laser sealing method according to claim 1, wherein in step S2, the particle size of the Ag-Cu-Sn powder is 5 μm to 50 μm.
5. The laser sealing method according to claim 1, wherein in step S2, when the solder is Ag-Cu-Sn powder, a foam Ni foil is placed on the solder;
when the solder is Ag-Cu-Sn foil, placing foam Ni foil or spraying foam Ni powder on the solder.
6. A laser sealing method according to claim 1, wherein in step S2, the thickness of the foamed Ni is 10 μm to 30 μm.
7. A laser sealing method according to claim 1, wherein in step S3, the wavelength of the laser light is 800nm to 1100nm.
8. A laser sealing method according to claim 1, wherein in step S3, the parameters of the laser irradiation are: laser scanning speed 80mm min -1 -160mm·min -1 The laser power is 80W-160W, the pulse width is 1.5ms-3.0ms, the frequency is 5Hz-10 Hz, and the scanning times are 1-3 tracks.
9. A laser sealing method according to claim 1, wherein in step S3, the laser irradiation is performed in a protective atmosphere.
10. A glass-stainless steel seal made by the laser sealing method of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311074427.1A CN117263528A (en) | 2023-08-24 | 2023-08-24 | Laser sealing method for glass and stainless steel by adding foam nickel as transition layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311074427.1A CN117263528A (en) | 2023-08-24 | 2023-08-24 | Laser sealing method for glass and stainless steel by adding foam nickel as transition layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117263528A true CN117263528A (en) | 2023-12-22 |
Family
ID=89214982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311074427.1A Pending CN117263528A (en) | 2023-08-24 | 2023-08-24 | Laser sealing method for glass and stainless steel by adding foam nickel as transition layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117263528A (en) |
-
2023
- 2023-08-24 CN CN202311074427.1A patent/CN117263528A/en active Pending
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