CN110681935A - Laser self-melting brazing method for aluminum alloy-stainless steel dissimilar metal - Google Patents
Laser self-melting brazing method for aluminum alloy-stainless steel dissimilar metal Download PDFInfo
- Publication number
- CN110681935A CN110681935A CN201910978314.1A CN201910978314A CN110681935A CN 110681935 A CN110681935 A CN 110681935A CN 201910978314 A CN201910978314 A CN 201910978314A CN 110681935 A CN110681935 A CN 110681935A
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- aluminum alloy
- welded
- steel plate
- welding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/005—Soldering by means of radiant energy
- B23K1/0056—Soldering by means of radiant energy soldering by means of beams, e.g. lasers, E.B.
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
- B23K1/206—Cleaning
-
- 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
- B23K35/38—Selection of media, e.g. special atmospheres for surrounding the working area
- B23K35/383—Selection of media, e.g. special atmospheres for surrounding the working area mainly containing noble gases or nitrogen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
- B23K2103/05—Stainless steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
Abstract
A laser self-fluxing brazing method for aluminum alloy-stainless steel dissimilar metal comprises the following steps: s1, respectively polishing and cleaning areas to be welded of the aluminum alloy plate and the stainless steel plate, and then performing surface activation treatment on the areas to be welded of the stainless steel plate by using a pickling solution; s2, plating a Cu-Ni metal composite plating layer on the surface of a region to be welded of the stainless steel plate; s3, assembling the stainless steel plate and the aluminum alloy plate into a lap joint form, and welding by using square spot laser; during welding, 1/2-3/4 square light spots are controlled to irradiate on an aluminum alloy plate to melt aluminum alloy, 1/4-1/2 square light spots are controlled to irradiate on a stainless steel plate to heat but not melt stainless steel, and the molten aluminum alloy is spread on the unmelted stainless steel to form a brazing interface. According to the method, the Cu-Ni composite layer is prepared in the to-be-welded area of the stainless steel, the growth of intermetallic compounds in the welding process can be adjusted, the square light spot laser is used for controlling heat input, the spreading of molten aluminum alloy on the surface of the stainless steel can be promoted, and the welded joint with attractive appearance and excellent comprehensive performance is obtained.
Description
Technical Field
The invention relates to a laser self-melting brazing method for aluminum alloy-stainless steel dissimilar metals, belonging to the technical field of welding.
Background
In the face of increasingly serious energy shortage problems, the light weight of vehicles is receiving more and more attention from various countries. The full stainless steel subway train body structure further uses an aluminum alloy material to replace part of stainless steel of a non-bearing structure, so that the train body weight can be greatly reduced, and the electric energy consumed by the subway train in the starting and running processes is reduced. The new energy automobile structurally adopts an aluminum-steel composite structure, so that the dead weight of the automobile body can be reduced, and the cruising ability is improved. However, welding between aluminum alloy and stainless steel still has the problems of poor joint forming, difficult spreading of cladding metal, generation of brittle intermetallic compounds at the interface, easy generation of cracks and the like. Because the difference between the melting points of aluminum and steel is large, the traditional melting welding method is easy to cause the steel to react with the aluminum alloy after being melted to generate a large amount of intermetallic compounds, so that the steel is broken after being welded.
In modern processing and manufacturing industries, laser welding is more and more widely applied, researchers use laser as a heat source, and combine aluminum-silicon welding wires with high affinity to stainless steel with various brazing agents to provide an aluminum-steel laser fusion brazing method. However, this method requires a complex synchronous wire feeding system to accomplish stable feeding of the welding wire, and generally, the front wire feeding tube needs to be fixed on the laser head for relative stability between the welding wire and the laser beam, which seriously reduces the accessibility of laser welding. Moreover, laser wire filling welding has extremely strict requirements on the distance between a laser spot and the tip of a welding wire and the alignment, the alignment difficulty is high, and the welding efficiency is seriously reduced. The common aluminum-steel fusion brazing usually adopts fluorine-containing compounds as brazing flux to improve the spreadability of fusion-coated metal on the surface of stainless steel, but the brazing flux releases fluorine-containing carcinogenic gas under high-temperature heating, thereby seriously harming human health. Researchers also realize aluminum-steel welding by laser deep melting welding, which is based on the principle that aluminum alloy placed on the surface of stainless steel is melted through by high-power laser, stainless steel on the upper surface of a part is melted, and the melted aluminum alloy is combined with a small amount of melted stainless steel in a reaction way; or by melting through the stainless steel plate lying above and by a small amount melting the lower aluminum alloy plate. Although the method does not need welding wires and the welding process is relatively stable, thick intermetallic compounds are formed, so that the welding joint generally has the defects of microcracks and the like, and the quality of the welding joint cannot be ensured.
Disclosure of Invention
The invention aims to provide a laser self-fluxing brazing method for dissimilar metals of aluminum alloy-stainless steel, which comprises the steps of preparing a Cu-Ni composite layer in a to-be-welded area of the stainless steel, regulating the growth of intermetallic compounds in the welding process, and promoting the spreading of molten aluminum alloy on the surface of the stainless steel by controlling heat input by using square light spot laser to obtain a welded joint with attractive appearance and excellent comprehensive performance.
A laser self-fluxing brazing method for aluminum alloy-stainless steel dissimilar metal comprises the following steps:
s1, respectively polishing and cleaning to-be-welded areas of an aluminum alloy plate and a stainless steel plate to be welded, and after polishing and cleaning, performing surface activation treatment on to-be-welded areas of the stainless steel plate by using a pickling solution; the thickness of the aluminum alloy plate and the stainless steel plate to be welded is 1-4 mm;
s2, plating a Cu metal plating layer with the thickness of 8-14 mu m and a Ni metal plating layer with the thickness of 5-9 mu m on the surface of the area to be welded of the stainless steel plate in sequence by using an electroplating mode, and forming a Cu-Ni composite plating layer on the surface of the area to be welded of the stainless steel plate;
s3, assembling the stainless steel plate and the aluminum alloy plate into a lap joint mode that the aluminum alloy plate is arranged above and below to form a piece to be welded; welding a workpiece to be welded by using square spot laser, wherein the laser power is 2000-4000W, the square spot size is (2.5-6.5) mm, the welding speed is 0.5-0.9m/min, and high-purity argon is adopted for protection in the welding process;
during welding, the position of a laser beam is adjusted, 1/2-3/4 square light spots are controlled to irradiate on an aluminum alloy plate to melt aluminum alloy, 1/4-1/2 square light spots are controlled to irradiate on a stainless steel plate to heat but not melt stainless steel, the molten aluminum alloy is spread on the unmelted stainless steel to form a brazing interface, and welding is finished.
The principle of the invention is as follows: according to the invention, the stainless steel plate and the aluminum alloy plate are assembled into a lap joint form, the aluminum alloy plate is arranged on the stainless steel plate, the distribution of heat on the aluminum alloy and the stainless steel is accurately controlled by adopting square light spots, so that part of laser energy melts the edge of the aluminum alloy and automatically spreads to the surface of the stainless steel under the action of gravity, and the other part of laser energy heats the stainless steel base metal, so that the wetting and spreading of the molten aluminum alloy is promoted, the stainless steel is ensured to be molten, and a brazing interface is obtained. The Cu-Ni composite coating on the surface of the stainless steel, particularly the Ni coating with high affinity with the aluminum alloy, can improve the wettability of the molten aluminum alloy, and after the molten aluminum alloy is contacted with the coating, aluminum, copper, nickel and iron atoms are diffused at high temperature to generate an intermetallic compound layer through reaction, so that the connection of the aluminum alloy and the stainless steel is realized.
The thickness of the aluminum alloy plate and the stainless steel plate is limited to be 1-4mm, namely the application range of the technical scheme of the invention is welding the aluminum alloy plate with the thickness of 1-4mm and the stainless steel plate. This was obtained by a number of experiments and the principle was analyzed as follows: the total amount of melting of the aluminium alloy sheet that is too thin during laser self-fluxing is small and it is difficult to form an effective lap joint. When the aluminum alloy plate with the excessive thickness adopts single laser, the required laser power is very high, so that the heat input is too large, the stainless steel plate is overheated, excessive intermetallic compounds are generated on the interface of the aluminum steel, and a large amount of cracks are generated; and during welding, after the too thick aluminum alloy is melted, the height difference from the upper surface of the stainless steel plate is large, and the melted aluminum alloy has certain viscosity and is solidified before finishing spreading, so that an effective joint cannot be formed. The excessively thin stainless steel plate is easy to generate serious deformation when being welded by using the technical scheme of the invention, and the welding seam is directly cracked due to excessive deformation; the stainless steel plate is too thick and can lead to the heat of laser to be led away by the base metal fast, and the regional temperature gradient that the stainless steel was heated is too big, and only central temperature is high, and the region that is close to the center reduces along with the increase temperature of distance fast, can lead to the aluminium alloy of melting and stainless steel to contact back rapid solidification, hardly spreads on the stainless steel surface.
The thicknesses of the copper metal coating and the nickel metal coating on the surface of the stainless steel are determined according to a large number of experiments, and the analysis of the thickness selection is determined by various factors, mainly aiming at better generating uniform alloying reaction at an interface by the alloy and obtaining a welding joint with excellent comprehensive mechanics.
Compared with the prior art, the invention has the following beneficial effects:
the invention adopts square spot laser to weld, the energy distribution of the square spot laser is uniform, the heat distribution can be accurately controlled through the heating area, and the centering is simple and convenient.
Compared with the laser wire filling welding in the prior art, the wire feeding device does not need to be additionally arranged, centering is not needed, the welding process only has the action between laser and the stably-constrained base metal, the laser welding device is simplified, the welding accessibility is greatly improved, the harsh requirement of welding wires and laser centering is avoided, and the laser wire filling welding has higher stability and operability. Compare in prior art laser deep melting welding, can make things convenient for more through the irradiation position adjustment laser energy distribution on aluminum alloy and stainless steel plate of square facula for the aluminum alloy melts and the stainless steel does not melt, and the molten aluminum alloy spreads on the stainless steel that does not melt, forms stable even brazing interface, hinders to generate too thick fragile intermetallic compound, has avoided the too big microcrack that causes of intermetallic compound's thickness, has guaranteed the welded joint quality.
And thirdly, a Cu-Ni composite coating is prepared on the surface of the stainless steel for alloy element interface regulation, the thickness of the alloy element layer can be randomly controlled compared with the addition of an intermediate layer, a strict assembly flow is not required, the adhesion is stronger compared with the common metal powder coating, the types and the proportions of the total elements can be randomly controlled compared with the introduction of the alloy elements into the welding wire, and the interference of other irrelevant elements is avoided.
And fourthly, the Cu-Ni composite coating on the surface of the stainless steel can promote the molten aluminum alloy to spread on the surface of the stainless steel, particularly, the Ni coating can increase the wetting distance of the molten aluminum alloy on the stainless steel, reduce the wetting angle and obtain the welding joint with attractive appearance. Cu and Ni elements in the Cu-Ni composite coating can participate in Fe-Al metallurgical reaction to replace Fe atoms in an Fe-Al compound, so that the brittleness of the intermetallic compound is reduced, the chemical potential of the Fe elements at an aluminum alloy-stainless steel interface is improved, the Fe atoms are prevented from diffusing into molten aluminum alloy, the intermetallic compound is prevented from being too thick, microcracks are avoided, and the comprehensive mechanical property of a welding joint is improved.
In the step S1, the to-be-welded areas of the aluminum alloy plate and the stainless steel plate to be welded are polished by using 240-480-mesh sand paper. The smooth stainless steel surface that obtains after polishing with the fine abrasive paper of mistake leads to the cladding material adhesive force easily not enough, and the absorptivity of laser energy can be reduced on too smooth aluminum alloy surface, and the test verifies, and 240 ~ 480 mesh abrasive paper are polished and can be guaranteed stainless steel surface coating adhesive force, can guarantee the absorptivity of laser energy on aluminum alloy surface again.
Further, in the step S1 of the present invention, the pickling solution used for the surface activation treatment of the to-be-welded region of the stainless steel plate by the pickling solution is 20% by mass of H2SO4And 15% aqueous HCl, the surface activation treatment parameters were: the pickling temperature is 45-65 ℃, and the pickling time is 50-65 s.
The acid pickling activation is to further remove the surface oxide film, generate activation points on the surface of the stainless steel, and improve the deposition efficiency and the adhesive force of the plating layer on the surface of the stainless steel.
Further, the thickness of the aluminum alloy plate to be welded is less than or equal to that of the stainless steel plate.
Tests prove that in practical application, the welding method provided by the invention has the advantages that the process parameters of the thickness of the aluminum alloy plate is less than or equal to that of the stainless steel plate are easier to match, and the obtained welding effect is good.
Further, the present invention is providedIn step S2, the plating solution for plating the Cu metal layer contains Cu as a component2(OH)2CO310-20g/L，HEDP 80-100g/L，K2CO335-45g/L，H2O22-5mL，C4H4O6KNa 5-10g/L, controlling the pH value of the electroplating solution at 9-10 in the electroplating process, and the electroplating parameters are as follows: the temperature is 45-55 ℃, and the current density is 0.5-1.2A/dm2The time is 20-40 min.
Furthermore, in step S2 of the present invention, the Ni plating layer is formed by electroplating with an Ni plating solution containing NaCl 5-15g/L and H3BO330-35g/L，NiSO430-50g/L，MgSO410-15g/L, controlling the pH value of the electroplating solution to be 4-5 in the electroplating process, wherein the electroplating parameters are as follows: the temperature is 40-50 ℃, and the current density is 0.8-1.0A/dm2The time is 60-90 min.
Furthermore, the magnetic stirrer is adopted for stirring in the electroplating process, and the stirring speed is 100-150 r/min.
The magnetic stirrer is adopted for stirring in the electroplating process, so that the temperature and the concentration of each position of the electroplating solution can be kept relatively uniform, and the magnetic stirring at 100-150r/min can ensure a better electroplating effect, so that the surface quality of the plating layer is uniform.
Further, in the step S3 of the present invention, the flow rate of argon used for the welding process using the high purity argon shield is 15 to 18L/min.
The shielding gas nozzle used in the step (3) and the laser beam are positioned on the same plane, and the included angle between the shielding gas nozzle and the surface of the workpiece is 50 DEG
Too large protective gas flow quickly cools the welding line to generate cracks, and too small gas flow cannot prevent oxidation, so that the protective gas flow is controlled to be 15-18L/min.
Further, in the step S3, the laser power of the square spot laser used for welding the workpiece to be welded by using the square spot laser is 2300-.
Further, in step S3 of the present invention, the spot size of the square spot laser used for welding the workpiece to be welded is (3-5) mm by (3-5) mm.
Tests prove that the welded joint obtained by adopting the laser power and the laser spot size has good forming and excellent comprehensive mechanical property.
Further, in step S3 of the present invention, the position of the laser beam is adjusted during welding, 2/3 square spots are controlled to irradiate on the aluminum alloy plate to melt the aluminum alloy, and 1/3 square spots are controlled to irradiate on the stainless steel plate to heat but not melt the stainless steel.
Experiments prove that 2/3 square light spots irradiate on the aluminum alloy plate, 1/3 square light spots irradiate on the stainless steel plate, so that the aluminum alloy can be better spread on the stainless steel plate, and the welded joint with good welded joint and excellent comprehensive mechanical property is obtained.
Drawings
FIG. 1 is a schematic view of laser self-fluxing brazing of an aluminum alloy-stainless steel of the present invention.
FIG. 2 is a schematic diagram of laser spot positions of the laser self-fluxing brazing of aluminum alloy-stainless steel according to the invention.
FIG. 3 is a cross-sectional profile of an aluminum alloy-stainless steel lap joint obtained in example two of the present invention.
FIG. 4 is a weld microstructure map of a weld joint obtained in example III of the present invention.
In the figure, 1-stainless steel plate plated with Cu-Ni composite coating in the area to be welded, 2-shielding gas guide pipe, 3-shielding gas nozzle, 4-laser head, 5-square laser beam, 6-aluminum alloy plate, 7-welding seam and 8-square light spot.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
A laser self-fluxing brazing method for aluminum alloy-stainless steel dissimilar metal comprises the following steps:
s1, respectively polishing and cleaning to-be-welded areas of an aluminum alloy plate and a stainless steel plate to be welded, and after polishing and cleaning, performing surface activation treatment on to-be-welded areas of the stainless steel plate by using a pickling solution; the thickness of the aluminum alloy plate and the stainless steel plate to be welded is 1-4 mm;
s2, plating a Cu metal plating layer with the thickness of 8-14 mu m and a Ni metal plating layer with the thickness of 5-9 mu m on the surface of the area to be welded of the stainless steel plate in sequence by using an electroplating mode, and forming a Cu-Ni composite plating layer on the surface of the area to be welded of the stainless steel plate;
s3, assembling the stainless steel plate and the aluminum alloy plate into a lap joint mode that the aluminum alloy plate is arranged above and below to form a piece to be welded; welding a workpiece to be welded by using square spot laser, wherein the laser power is 2000-4000W, preferably 2300-3700W, the size of the square spot is (2.5-6.5) mm, preferably (3-5) mm, the welding speed is 0.5-0.9m/min, and the welding process adopts high-purity argon protection, preferably the argon flow is 15-18L/min;
during welding, the position of a laser beam is adjusted, 1/2-3/4 square light spots are controlled to irradiate on an aluminum alloy plate to melt aluminum alloy, 1/4-1/2 square light spots are controlled to irradiate on a stainless steel plate to heat but not melt stainless steel, the molten aluminum alloy is spread on the unmelted stainless steel to form a brazing interface, and welding is finished.
Fig. 1 is a schematic view of laser self-fluxing brazing of aluminum alloy-stainless steel of the present invention, wherein 1 is a stainless steel plate plated with a Cu-Ni composite plating layer in a region to be welded, 2 and 3 are respectively a shielding gas guide pipe and a shielding gas nozzle for delivering high purity argon gas to a welding part during welding, 4 is a laser head, 5 is a square laser beam emitted by the laser head, 6 is an aluminum alloy plate, and 7 is an overlap joint weld formed by welding the stainless steel plate and the aluminum alloy plate. FIG. 2 is a schematic diagram of laser spot positions of the aluminum alloy-stainless steel laser self-fluxing brazing of the invention, wherein 8 is a square spot which is partially irradiated on an aluminum alloy plate and partially irradiated on a stainless steel plate.
Preferably, in the step S1, the pickling solution used for the surface activation treatment of the region to be welded of the stainless steel plate by the pickling solution is 20% by mass of H2SO4And 15% aqueous HCl, the surface activation treatment parameters were: the pickling temperature is 45-65 ℃, and the pickling time is 50-65 s.
Preferably, the thickness of the aluminum alloy plate to be welded is less than or equal to the thickness of the stainless steel plate.
Preferably, in the step S2, the plating solution for the Cu metal plating layer contains Cu as a component2(OH)2CO310-20g/L，HEDP 80-100g/L，K2CO335-45g/L，H2O22-5mL，C4H4O6KNa 5-10g/L, controlling the pH value of the electroplating solution at 9-10 in the electroplating process, and the electroplating parameters are as follows: the temperature is 45-55 ℃, and the current density is 0.5-1.2A/dm2The time is 20-40 min.
Preferably, in step S2, the Ni plating layer is formed by plating the Ni layer with a plating solution containing 5-15g/L NaCl and H3BO330-35g/L，NiSO430-50g/L，MgSO410-15g/L, controlling the pH value of the electroplating solution to be 4-5 in the electroplating process, wherein the electroplating parameters are as follows: the temperature is 40-50 ℃, and the current density is 0.8-1.0A/dm2The time is 60-90 min.
Preferably, a magnetic stirrer is adopted for stirring in the electroplating process, and the stirring speed is 100-150 r/min.
Preferably, in the step S3, the laser beam position is adjusted during welding, 2/3 square light spots are controlled to irradiate on the aluminum alloy plate to melt the aluminum alloy, and 1/3 square light spots are controlled to irradiate on the stainless steel plate to heat but not melt the stainless steel.
Example one
A laser self-fluxing brazing method for aluminum alloy-stainless steel dissimilar metal is characterized in that an aluminum alloy plate to be welded is a 6061 aluminum alloy plate with the thickness of 1mm, a stainless steel plate to be welded is a 301L stainless steel plate with the thickness of 1mm, and the welding steps are as follows:
s1, grinding to-be-welded areas of an aluminum alloy plate and a stainless steel plate to be welded by using 240-mesh sand paper, scrubbing the to-be-welded areas of the aluminum alloy plate by using acetone, putting the stainless steel plate into the acetone for ultrasonic cleaning for 2min, and adopting 20% H by mass2SO4And 15% HCl, and performing surface activation treatment on the to-be-welded area of the stainless steel plate at 45 ℃ for 60 s;
s2, sequentially plating a Cu metal plating layer with the thickness of 8 microns and a Ni metal plating layer with the thickness of 5 microns on the surface of a region to be welded of the stainless steel plate in an electroplating mode, and forming a Cu-Ni composite plating layer on the surface of the region to be welded of the stainless steel plate;
in this example, Cu-plated goldThe component of the electroplating solution adopted by the plating layer is Cu2(OH)2CO310g/L，HEDP 90g/L，K2CO335g/L，H2O22mL，C4H4O6KNa 5g/L, controlling the pH value of the electroplating solution to be 9 in the electroplating process, wherein the electroplating parameters are as follows: the temperature is 45 ℃, and the current density is 0.5A/dm2And the time is 20 min.
In this example, the plating solution used for plating the Ni metal layer contained NaCl 5g/L and H as the Ni plating solution3BO330g/L，NiSO430g/L，MgSO410g/L, controlling the pH value of the electroplating solution to be 4 in the electroplating process, wherein the electroplating parameters are as follows: the temperature is 40 ℃, and the current density is 0.8A/dm2And the time is 60 min.
The operation of plating the Cu and Ni metal plating layers is that firstly, a stainless steel plate is put into a Cu plating electroplating solution to be connected with a negative electrode of a direct current power supply, a pure copper sheet is put into the Cu plating electroplating solution to be connected with a positive electrode of the direct current power supply, and the direct current power supply is switched on to plate the Cu metal plating layer; washing the stainless steel plate plated with the Cu metal plating layer by using distilled water, putting the stainless steel plate into plating solution filled with Ni to be connected with a direct-current power supply cathode, putting a pure nickel sheet into the plating solution filled with Ni to be connected with a direct-current power supply anode, and turning on the direct-current power supply to plate the Ni metal plating layer; and stirring by adopting a magnetic stirrer in the two electroplating processes at the speed of 100 r/min. And immediately taking out the composite coating after electroplating, cleaning the composite coating by using distilled water and drying the composite coating. The thickness of the finally obtained copper plating layer is 8 mu m, and the thickness of the nickel plating layer is 5 mu m;
s3, assembling the stainless steel plate and the aluminum alloy plate into a lap joint mode that the aluminum alloy plate is arranged above and below to form a piece to be welded; welding a workpiece to be welded by using square spot laser, wherein the laser power is 2300W, the size of a square spot is 3mm x 3mm, the welding speed is 0.9m/min, high-purity argon is adopted for protection in the welding process, and the argon flow is 18L/min;
during welding, the position of a laser beam is adjusted, 1/2 square light spots are controlled to irradiate on an aluminum alloy plate to melt aluminum alloy, 1/2 square light spots irradiate on a stainless steel plate to heat but not to melt stainless steel, the molten aluminum alloy is spread on the unmelted stainless steel, substance diffusion is carried out among the aluminum alloy, the composite coating and the stainless steel to form a brazing interface, and welding is completed. The intermetallic thickness at the aluminum-steel interface was approximately 9 μm and the average strength of the resulting weld joint was characterized to be 186.2N/mm.
Example two
A laser self-fluxing brazing method for aluminum alloy-stainless steel dissimilar metal is characterized in that an aluminum alloy plate to be welded is a 6063 aluminum alloy plate with the thickness of 2mm, a stainless steel plate to be welded is a 304 stainless steel plate with the thickness of 2mm, and the welding steps are as follows:
s1, grinding to-be-welded areas of an aluminum alloy plate and a stainless steel plate to be welded by using 240-mesh sand paper, scrubbing the to-be-welded areas of the aluminum alloy plate by using acetone, putting the stainless steel plate into the acetone for ultrasonic cleaning for 2min, and adopting 20% H by mass2SO4And 15% HCl, and carrying out surface activation treatment on the to-be-welded area of the stainless steel plate at 55 ℃, wherein the time of the surface activation treatment is 60 s;
s2, sequentially plating a Cu metal plating layer with the thickness of 11 microns and a Ni metal plating layer with the thickness of 6 microns on the surface of a region to be welded of the stainless steel plate in an electroplating mode, and forming a Cu-Ni composite plating layer on the surface of the region to be welded of the stainless steel plate;
in this example, the Cu plating metal layer was formed using a plating solution containing Cu as a component2(OH)2CO315g/L，HEDP 90g/L，K2CO340g/L，H2O23mL，C4H4O6KNa 7g/L, controlling the pH value of the electroplating solution to be 10 in the electroplating process, wherein the electroplating parameters are as follows: the temperature is 55 ℃, and the current density is 1A/dm2And the time is 30 min.
In this example, the plating solution used for plating the Ni metal layer contained 10g/L NaCl as the Ni plating solution and 10g/L H as the H plating solution3BO330g/L，NiSO440g/L，MgSO415g/L, controlling the pH value of the electroplating solution to be 5 in the electroplating process, wherein the electroplating parameters are as follows: the temperature is 50 ℃, and the current density is 0.8A/dm2And the time is 70 min.
The operation of plating the Cu and Ni metal plating layers is that firstly, a stainless steel plate is put into a Cu plating electroplating solution to be connected with a negative electrode of a direct current power supply, a pure copper sheet is put into the Cu plating electroplating solution to be connected with a positive electrode of the direct current power supply, and the direct current power supply is switched on to plate the Cu metal plating layer; washing the stainless steel plate plated with the Cu metal plating layer by using distilled water, putting the stainless steel plate into plating solution filled with Ni to be connected with a direct-current power supply cathode, putting a pure nickel sheet into the plating solution filled with Ni to be connected with a direct-current power supply anode, and turning on the direct-current power supply to plate the Ni metal plating layer; and stirring by adopting a magnetic stirrer in the two electroplating processes at the speed of 120 r/min. And immediately taking out the composite coating after electroplating, cleaning the composite coating by using distilled water and drying the composite coating. The thickness of the finally obtained copper plating layer is 11 mu m, and the thickness of the nickel plating layer is 6 mu m;
s3, assembling the stainless steel plate and the aluminum alloy plate into a lap joint mode that the aluminum alloy plate is arranged above and below to form a piece to be welded; welding a workpiece to be welded by using square spot laser, wherein the laser power is 2800W, the size of a square spot is 3.5mm by 3.5mm, the welding speed is 0.7m/min, high-purity argon is adopted for protection in the welding process, and the preferred argon flow is 17L/min;
during welding, the position of a laser beam is adjusted, 2/3 square light spots are controlled to irradiate on an aluminum alloy plate to melt aluminum alloy, 1/3 square light spots irradiate on a stainless steel plate to heat but not to melt stainless steel, the molten aluminum alloy is spread on the unmelted stainless steel, substance diffusion is carried out among the aluminum alloy, the composite coating and the stainless steel to form a brazing interface, and welding is completed. FIG. 3 is a cross-sectional profile of the aluminum alloy-stainless steel lap joint obtained in this example, which was obtained by cutting a standard metallographic specimen of the lap joint, polishing with sand paper and a polisher, then corroding with Keller's reagent for 20 seconds, and photographing under a Zeiss microscope. The resulting weld joint formed well with no porosity and cracks, an intermetallic thickness at the aluminum-steel interface of about 13 μm, and an average strength of the weld joint of 221.8N/mm.
EXAMPLE III
A laser self-fluxing brazing method for aluminum alloy-stainless steel dissimilar metal is characterized in that an aluminum alloy plate to be welded is a 6063 aluminum alloy plate with the thickness of 4mm, a stainless steel plate to be welded is a 304 stainless steel plate with the thickness of 4mm, and the welding steps are as follows:
s1, grinding to-be-welded areas of the aluminum alloy plate and the stainless steel plate to be welded by using 240-mesh sand paper, and then using acetoneScrubbing an area to be welded of the aluminum alloy plate, putting the stainless steel plate into acetone for ultrasonic cleaning for 2min, and adopting 20% H by mass2SO4And 15% HCl, and carrying out surface activation treatment on the to-be-welded area of the stainless steel plate at 60 ℃, wherein the time of the surface activation treatment is 65 s;
s2, sequentially plating a Cu metal plating layer with the thickness of 14 microns and a Ni metal plating layer with the thickness of 9 microns on the surface of a region to be welded of the stainless steel plate in an electroplating mode, and forming a Cu-Ni composite plating layer on the surface of the region to be welded of the stainless steel plate;
in this example, the Cu plating metal layer was formed using a plating solution containing Cu as a component2(OH)2CO318g/L，HEDP 95g/L，K2CO345g/L，H2O25mL，C4H4O6KNa 7g/L, controlling the pH value of the electroplating solution to be 10 in the electroplating process, wherein the electroplating parameters are as follows: the temperature is 52 ℃, and the current density is 1.1A/dm2Time 37 min.
In this example, the plating solution used for plating the Ni metal layer contained NaCl 15g/L and H3BO335g/L，NiSO450g/L，MgSO415g/L, controlling the pH value of the electroplating solution to be 5 in the electroplating process, wherein the electroplating parameters are as follows: the temperature is 50 ℃, and the current density is 1.0A/dm2And the time is 90 min.
The operation of plating the Cu and Ni metal plating layers is that firstly, a stainless steel plate is put into a Cu plating electroplating solution to be connected with a negative electrode of a direct current power supply, a pure copper sheet is put into the Cu plating electroplating solution to be connected with a positive electrode of the direct current power supply, and the direct current power supply is switched on to plate the Cu metal plating layer; washing the stainless steel plate plated with the Cu metal plating layer by using distilled water, putting the stainless steel plate into plating solution filled with Ni to be connected with a direct-current power supply cathode, putting a pure nickel sheet into the plating solution filled with Ni to be connected with a direct-current power supply anode, and turning on the direct-current power supply to plate the Ni metal plating layer; and stirring by adopting a magnetic stirrer in the two electroplating processes at the speed of 150 r/min. And immediately taking out the composite coating after electroplating, cleaning the composite coating by using distilled water and drying the composite coating. The thickness of the finally obtained copper plating layer is 14 mu m, and the thickness of the nickel plating layer is 9 mu m;
s3, assembling the stainless steel plate and the aluminum alloy plate into a lap joint mode that the aluminum alloy plate is arranged above and below to form a piece to be welded; welding a workpiece to be welded by using square spot laser, wherein the laser power is 3700W, the size of a square spot is 5mm x 5mm, the welding speed is 0.5m/min, high-purity argon is adopted for protection in the welding process, and the preferred argon flow is 15L/min;
during welding, the position of a laser beam is adjusted, 3/4 square light spots are controlled to irradiate on an aluminum alloy plate to melt aluminum alloy, 1/4 square light spots irradiate on a stainless steel plate to heat but not to melt stainless steel, the molten aluminum alloy is spread on the unmelted stainless steel, substance diffusion is carried out among the aluminum alloy, the composite coating and the stainless steel to form a brazing interface, and welding is completed. FIG. 4 is a weld microstructure topography of the welded joint obtained in this example, which is obtained by cutting a standard metallographic specimen of the lap joint, polishing the surface with sand paper, and collecting backscattered electrons under an FEI scanning electron microscope for imaging without corrosion. The obtained welded joint is characterized by good forming, no air holes and cracks, the thickness of the intermetallic compound at the aluminum-steel interface is about 18 mu m, no microcrack of the interface layer is found, and the average strength of the welded joint is 296.2N/mm.
Example four
A laser self-fluxing brazing method for aluminum alloy-stainless steel dissimilar metal is characterized in that an aluminum alloy plate to be welded is a 6061 aluminum alloy plate with the thickness of 1mm, a stainless steel plate to be welded is a 301L stainless steel plate with the thickness of 1mm, and the welding steps are as follows:
s1, grinding to-be-welded areas of an aluminum alloy plate and a stainless steel plate to be welded by using 240-mesh sand paper, scrubbing the to-be-welded areas of the aluminum alloy plate by using acetone, putting the stainless steel plate into the acetone for ultrasonic cleaning for 2min, and adopting 20% H by mass2SO4And 15% HCl, and performing surface activation treatment on the to-be-welded area of the stainless steel plate at 45 ℃ for 60 s;
s2, sequentially plating a Cu metal plating layer with the thickness of 8 microns and a Ni metal plating layer with the thickness of 5 microns on the surface of a region to be welded of the stainless steel plate in an electroplating mode, and forming a Cu-Ni composite plating layer on the surface of the region to be welded of the stainless steel plate;
in this example, Cu platingThe electroplating solution used for the layer has Cu as a component2(OH)2CO310g/L，HEDP 90g/L，K2CO335g/L，H2O22mL，C4H4O6KNa 5g/L, controlling the pH value of the electroplating solution to be 9 in the electroplating process, wherein the electroplating parameters are as follows: the temperature is 45 ℃, and the current density is 0.5A/dm2And the time is 20 min.
In this example, the plating solution used for plating the Ni metal layer contained NaCl 5g/L and H as the Ni plating solution3BO330g/L，NiSO430g/L，MgSO410g/L, controlling the pH value of the electroplating solution to be 4 in the electroplating process, wherein the electroplating parameters are as follows: the temperature is 40 ℃, and the current density is 0.8A/dm2And the time is 60 min.
The operation of plating the Cu and Ni metal plating layers is that firstly, a stainless steel plate is put into a Cu plating electroplating solution to be connected with a negative electrode of a direct current power supply, a pure copper sheet is put into the Cu plating electroplating solution to be connected with a positive electrode of the direct current power supply, and the direct current power supply is switched on to plate the Cu metal plating layer; washing the stainless steel plate plated with the Cu metal plating layer by using distilled water, putting the stainless steel plate into plating solution filled with Ni to be connected with a direct-current power supply cathode, putting a pure nickel sheet into the plating solution filled with Ni to be connected with a direct-current power supply anode, and turning on the direct-current power supply to plate the Ni metal plating layer; and stirring by adopting a magnetic stirrer in the two electroplating processes at the speed of 100 r/min. And immediately taking out the composite coating after electroplating, cleaning the composite coating by using distilled water and drying the composite coating. The thickness of the finally obtained copper plating layer is 8 mu m, and the thickness of the nickel plating layer is 5 mu m;
s3, assembling the stainless steel plate and the aluminum alloy plate into a lap joint mode that the aluminum alloy plate is arranged above and below to form a piece to be welded; welding a workpiece to be welded by using square spot laser, wherein the laser power is 2000W, the size of a square spot is 2.5mm by 2.5mm, the welding speed is 0.9m/min, high-purity argon is adopted for protection in the welding process, and the argon flow is 18L/min;
during welding, the position of a laser beam is adjusted, 1/2 square light spots are controlled to irradiate on an aluminum alloy plate to melt aluminum alloy, 1/2 square light spots irradiate on a stainless steel plate to heat but not to melt stainless steel, the molten aluminum alloy is spread on the unmelted stainless steel, substance diffusion is carried out among the aluminum alloy, the composite coating and the stainless steel to form a brazing interface, and welding is completed. The obtained welded joint was well formed without voids and cracks, the intermetallic thickness at the aluminum-steel interface was about 5 μm, and the interface layer was discontinuous in some regions, as characterized, the average strength of the welded joint obtained in this example was 158.5N/mm.
EXAMPLE five
A laser self-fluxing brazing method for aluminum alloy-stainless steel dissimilar metal is characterized in that an aluminum alloy plate to be welded is a 6063 aluminum alloy plate with the thickness of 4mm, a stainless steel plate to be welded is a 304 stainless steel plate with the thickness of 4mm, and the welding steps are as follows:
s1, grinding to-be-welded areas of an aluminum alloy plate and a stainless steel plate to be welded by using 240-mesh sand paper, scrubbing the to-be-welded areas of the aluminum alloy plate by using acetone, putting the stainless steel plate into the acetone for ultrasonic cleaning for 2min, and adopting 20% H by mass2SO4And 15% HCl, and carrying out surface activation treatment on the to-be-welded area of the stainless steel plate at 60 ℃, wherein the time of the surface activation treatment is 65 s;
s2, sequentially plating a Cu metal plating layer with the thickness of 14 microns and a Ni metal plating layer with the thickness of 9 microns on the surface of a region to be welded of the stainless steel plate in an electroplating mode, and forming a Cu-Ni composite plating layer on the surface of the region to be welded of the stainless steel plate;
in this example, the Cu plating metal layer was formed using a plating solution containing Cu as a component2(OH)2CO318g/L，HEDP 95g/L，K2CO345g/L，H2O25mL，C4H4O6KNa 7g/L, controlling the pH value of the electroplating solution to be 10 in the electroplating process, wherein the electroplating parameters are as follows: the temperature is 52 ℃, and the current density is 1.1A/dm2Time 37 min.
In this example, the plating solution used for plating the Ni metal layer contained NaCl 15g/L and H3BO335g/L，NiSO450g/L，MgSO415g/L, controlling the pH value of the electroplating solution to be 5 in the electroplating process, wherein the electroplating parameters are as follows: the temperature is 50 ℃, and the current density is 1.0A/dm2And the time is 90 min.
The operation of plating the Cu and Ni metal plating layers is that firstly, a stainless steel plate is put into a Cu plating electroplating solution to be connected with a negative electrode of a direct current power supply, a pure copper sheet is put into the Cu plating electroplating solution to be connected with a positive electrode of the direct current power supply, and the direct current power supply is switched on to plate the Cu metal plating layer; washing the stainless steel plate plated with the Cu metal plating layer by using distilled water, putting the stainless steel plate into plating solution filled with Ni to be connected with a direct-current power supply cathode, putting a pure nickel sheet into the plating solution filled with Ni to be connected with a direct-current power supply anode, and turning on the direct-current power supply to plate the Ni metal plating layer; and stirring by adopting a magnetic stirrer in the two electroplating processes at the speed of 150 r/min. And immediately taking out the composite coating after electroplating, cleaning the composite coating by using distilled water and drying the composite coating. The thickness of the finally obtained copper plating layer is 14 mu m, and the thickness of the nickel plating layer is 9 mu m;
s3, assembling the stainless steel plate and the aluminum alloy plate into a lap joint mode that the aluminum alloy plate is arranged above and below to form a piece to be welded; welding a workpiece to be welded by using square spot laser, wherein the laser power is 4000W, the size of a square spot is 6.5mm by 6.5mm, the welding speed is 0.5m/min, high-purity argon is adopted for protection in the welding process, and the preferred argon flow is 15L/min;
during welding, the position of a laser beam is adjusted, 3/4 square light spots are controlled to irradiate on an aluminum alloy plate to melt aluminum alloy, 1/4 square light spots irradiate on a stainless steel plate to heat but not to melt stainless steel, the molten aluminum alloy is spread on the unmelted stainless steel, substance diffusion is carried out among the aluminum alloy, the composite coating and the stainless steel to form a brazing interface, and welding is completed. The obtained welding joint is characterized by good forming, no air holes and cracks, the thickness of the intermetallic compound at the aluminum-steel interface is about 20 mu m, no microcrack of the interface layer is found, and the average strength of the welding joint is 252.7N/mm.
Claims (10)
1. A laser self-fluxing brazing method for aluminum alloy-stainless steel dissimilar metal comprises the following steps:
s1, respectively polishing and cleaning to-be-welded areas of an aluminum alloy plate and a stainless steel plate to be welded, and after polishing and cleaning, performing surface activation treatment on to-be-welded areas of the stainless steel plate by using a pickling solution; the thickness of the aluminum alloy plate and the stainless steel plate to be welded is 1-4 mm;
s2, plating a Cu metal plating layer with the thickness of 8-14 mu m and a Ni metal plating layer with the thickness of 5-9 mu m on the surface of the area to be welded of the stainless steel plate in sequence by using an electroplating mode, and forming a Cu-Ni composite plating layer on the surface of the area to be welded of the stainless steel plate;
s3, assembling the stainless steel plate and the aluminum alloy plate into a lap joint mode that the aluminum alloy plate is arranged above and below to form a piece to be welded; welding a workpiece to be welded by using square spot laser, wherein the laser power is 2000-4000W, the square spot size is (2.5-6.5) mm, the welding speed is 0.5-0.9m/min, and high-purity argon is adopted for protection in the welding process;
during welding, the position of a laser beam is adjusted, 1/2-3/4 square light spots are controlled to irradiate on an aluminum alloy plate to melt aluminum alloy, 1/4-1/2 square light spots are controlled to irradiate on a stainless steel plate to heat but not melt stainless steel, the molten aluminum alloy is spread on the unmelted stainless steel to form a brazing interface, and welding is finished.
2. The laser self-fluxing brazing method for dissimilar metals of aluminum alloy-stainless steel according to claim 1, wherein: in the step S1, the pickling solution used for the surface activation treatment of the region to be welded of the stainless steel plate by the pickling solution is 20% by mass of H2SO4And 15% aqueous HCl, the surface activation treatment parameters were: the pickling temperature is 45-65 ℃, and the pickling time is 50-65 s.
3. The laser self-fluxing brazing method for dissimilar metals of aluminum alloy-stainless steel according to claim 1, wherein: the thickness of the aluminum alloy plate to be welded is less than or equal to that of the stainless steel plate.
4. The laser self-fluxing brazing method for dissimilar metals of aluminum alloy-stainless steel according to claim 1, wherein: in the step S2, the Cu plating metal layer is formed by using a plating solution containing Cu as a component2(OH)2CO310-20g/L，HEDP 80-100g/L，K2CO335-45g/L，H2O22-5mL，C4H4O6KNa 5-10g/L, controlling the pH value of the electroplating solution at 9-10 during the electroplating process,the electroplating parameters are as follows: the temperature is 45-55 ℃, and the current density is 0.5-1.2A/dm2The time is 20-40 min.
5. The laser self-fluxing brazing method for dissimilar metals of aluminum alloy-stainless steel according to claim 1, wherein: in the step S2, the Ni plating metal layer is plated with Ni plating solution containing NaCl 5-15g/L and H3BO330-35g/L，NiSO430-50g/L，MgSO410-15g/L, controlling the pH value of the electroplating solution to be 4-5 in the electroplating process, wherein the electroplating parameters are as follows: the temperature is 40-50 ℃, and the current density is 0.8-1.0A/dm2The time is 60-90 min.
6. The laser self-fluxing brazing method of dissimilar metals of aluminum alloy-stainless steel according to claim 4 or 5, wherein: the magnetic stirrer is adopted for stirring in the electroplating process, and the stirring speed is 100-.
7. The laser self-fluxing brazing method for dissimilar metals of aluminum alloy-stainless steel according to claim 1, wherein: in the step S3, the flow of argon used for the welding process adopting high-purity argon protection is 15-18L/min.
8. The laser self-fluxing brazing method for dissimilar metals of aluminum alloy-stainless steel according to claim 1, wherein: in the step S3, the laser power of the square spot laser used for welding the workpiece to be welded is 2300-3700W.
9. The laser self-fluxing brazing method for dissimilar metals of aluminum alloy-stainless steel according to claim 1, wherein: in the step S3, the spot size of the square spot laser used for welding the workpiece to be welded is (3-5) mm by (3-5) mm.
10. The laser self-fluxing brazing method for dissimilar metals of aluminum alloy-stainless steel according to claim 1, wherein: in the step S3, the position of the laser beam is adjusted during welding, 2/3 square spots are controlled to irradiate on the aluminum alloy plate to melt the aluminum alloy, and 1/3 square spots are controlled to irradiate on the stainless steel plate to heat but not melt the stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910978314.1A CN110681935B (en) | 2019-10-15 | 2019-10-15 | Laser self-melting brazing method for aluminum alloy-stainless steel dissimilar metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910978314.1A CN110681935B (en) | 2019-10-15 | 2019-10-15 | Laser self-melting brazing method for aluminum alloy-stainless steel dissimilar metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110681935A true CN110681935A (en) | 2020-01-14 |
| CN110681935B CN110681935B (en) | 2020-11-13 |
Family
ID=69112693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910978314.1A Active CN110681935B (en) | 2019-10-15 | 2019-10-15 | Laser self-melting brazing method for aluminum alloy-stainless steel dissimilar metal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110681935B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111390384A (en) * | 2020-03-27 | 2020-07-10 | 江铃汽车股份有限公司 | Wire-filling-free laser fusion welding method applied to commercial car roof cover |
| CN111958113A (en) * | 2020-09-17 | 2020-11-20 | 哈尔滨工业大学（威海） | Aluminum/steel laser welding method under Cu element-surface microtexture composite regulation and control action |
| CN113199104A (en) * | 2021-05-28 | 2021-08-03 | 西南交通大学 | Rotary laser self-fluxing brazing method for improving strength of aluminum/steel lap joint |
| CN113588529A (en) * | 2021-07-14 | 2021-11-02 | 银邦金属复合材料股份有限公司 | Method for measuring aluminum alloy composite foil |
| CN114192983A (en) * | 2021-12-27 | 2022-03-18 | 武汉锐科光纤激光技术股份有限公司 | Laser self-fluxing welding method |
| CN114850709A (en) * | 2022-03-31 | 2022-08-05 | 航天材料及工艺研究所 | Welding method for stainless steel/aluminum alloy dissimilar metal pipeline |
| CN115354264A (en) * | 2021-05-02 | 2022-11-18 | 兰州交通大学 | Novel spraying method for spraying aluminum metal on surface of 304 stainless steel plate |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006088175A (en) * | 2004-09-21 | 2006-04-06 | Kobe Steel Ltd | Method for joining different materials |
| JP2007260701A (en) * | 2006-03-27 | 2007-10-11 | Kobe Steel Ltd | Method for joining different kinds of materials |
| CN101245479A (en) * | 2008-03-17 | 2008-08-20 | 哈尔滨工业大学 | Cyanideless electro-coppering method for magnesium alloy casting parts |
| CN102179627A (en) * | 2011-06-10 | 2011-09-14 | 长春理工大学 | Fusing-soldering welding method of aluminum-steel workpiece of joint positioned at one side of cladding steel |
| CN102764934A (en) * | 2012-07-05 | 2012-11-07 | 兰州理工大学 | Aluminum steel dissimilar metal laser welding-brazing welding method and filled powder |
| CN106270879A (en) * | 2016-09-29 | 2017-01-04 | 哈尔滨工业大学（威海） | The magnesium of a kind of coating assistant regulating and controlling and steel foreign material laser welding-brazing method |
| CN107262862A (en) * | 2017-06-22 | 2017-10-20 | 北京科技大学 | A kind of steel of nickel and zinc composite deposite/aluminium soldering method |
-
2019
- 2019-10-15 CN CN201910978314.1A patent/CN110681935B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006088175A (en) * | 2004-09-21 | 2006-04-06 | Kobe Steel Ltd | Method for joining different materials |
| JP2007260701A (en) * | 2006-03-27 | 2007-10-11 | Kobe Steel Ltd | Method for joining different kinds of materials |
| CN101245479A (en) * | 2008-03-17 | 2008-08-20 | 哈尔滨工业大学 | Cyanideless electro-coppering method for magnesium alloy casting parts |
| CN102179627A (en) * | 2011-06-10 | 2011-09-14 | 长春理工大学 | Fusing-soldering welding method of aluminum-steel workpiece of joint positioned at one side of cladding steel |
| CN102764934A (en) * | 2012-07-05 | 2012-11-07 | 兰州理工大学 | Aluminum steel dissimilar metal laser welding-brazing welding method and filled powder |
| CN106270879A (en) * | 2016-09-29 | 2017-01-04 | 哈尔滨工业大学（威海） | The magnesium of a kind of coating assistant regulating and controlling and steel foreign material laser welding-brazing method |
| CN107262862A (en) * | 2017-06-22 | 2017-10-20 | 北京科技大学 | A kind of steel of nickel and zinc composite deposite/aluminium soldering method |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111390384A (en) * | 2020-03-27 | 2020-07-10 | 江铃汽车股份有限公司 | Wire-filling-free laser fusion welding method applied to commercial car roof cover |
| CN111958113A (en) * | 2020-09-17 | 2020-11-20 | 哈尔滨工业大学（威海） | Aluminum/steel laser welding method under Cu element-surface microtexture composite regulation and control action |
| CN115354264A (en) * | 2021-05-02 | 2022-11-18 | 兰州交通大学 | Novel spraying method for spraying aluminum metal on surface of 304 stainless steel plate |
| CN115354264B (en) * | 2021-05-02 | 2024-01-30 | 兰州交通大学 | Spraying method for spraying aluminum metal on surface of 304 stainless steel plate |
| CN113199104A (en) * | 2021-05-28 | 2021-08-03 | 西南交通大学 | Rotary laser self-fluxing brazing method for improving strength of aluminum/steel lap joint |
| CN113588529A (en) * | 2021-07-14 | 2021-11-02 | 银邦金属复合材料股份有限公司 | Method for measuring aluminum alloy composite foil |
| CN114192983A (en) * | 2021-12-27 | 2022-03-18 | 武汉锐科光纤激光技术股份有限公司 | Laser self-fluxing welding method |
| CN114850709A (en) * | 2022-03-31 | 2022-08-05 | 航天材料及工艺研究所 | Welding method for stainless steel/aluminum alloy dissimilar metal pipeline |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110681935B (en) | 2020-11-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110681935B (en) | Laser self-melting brazing method for aluminum alloy-stainless steel dissimilar metal | |
| CN111958113B (en) | Aluminum/steel laser welding method under Cu element-surface microtexture composite regulation and control action | |
| Gao et al. | Parameter optimization and mechanism of laser–arc hybrid welding of dissimilar Al alloy and stainless steel | |
| US2798843A (en) | Plating and brazing titanium | |
| CN102528243A (en) | Arc welding-brazing method for titanium-aluminum dissimilar alloy TIG (tungsten inert gas) arc preheating | |
| CN106513892A (en) | Double-beam laser deep penetration brazing method applicable to moderately thick plate aluminum/steel dissimilar alloy connection | |
| CN107999916B (en) | A kind of compound silk filling melt-brazing method of the double light beam laser-TIG of dissimilar material | |
| CN102728937B (en) | Dissimilar metal welding method of titanium alloy and austenitic stainless steel | |
| CN106270876B (en) | A kind of aluminium lithium alloy and titanium alloy electron beam melt pricker welding method | |
| Nasiri et al. | Microstructure and properties of laser brazed magnesium to coated steel | |
| CN108526692A (en) | A kind of laser filler Welding of magnesium/aluminum dissimilar metal | |
| CN113199104A (en) | Rotary laser self-fluxing brazing method for improving strength of aluminum/steel lap joint | |
| CN110977168A (en) | Connection method of SiCp/Al composite material | |
| CN107803593B (en) | high-frequency-laser wire filling composite welding device and method | |
| CN111940874A (en) | Tungsten argon arc fusion welding process for dissimilar metals of titanium alloy and steel based on copper-nickel composite intermediate layer | |
| CN110899882A (en) | Laser brazing filler wire welding process for aluminum steel dissimilar metal | |
| CN100551600C (en) | A kind of arc assisted activating gas tungsten arc welding method | |
| CN106270878A (en) | The magnesium titanium laser welding-brazing of a kind of nickel coating auxiliary connects method | |
| CN113414494B (en) | Welding method of aluminum alloy and stainless steel capable of obtaining high-strength welding joint | |
| TWI621737B (en) | A preparation method of electro-thermal alloying for metal surface by mechanical auxiliary | |
| Lu et al. | Laser-MIG hybrid keyhole welded 6mm steel/aluminum butt joints | |
| CN107570859A (en) | A kind of Magnesium Alloy in Friction Stir welding process method | |
| CN108637477A (en) | A method of increasing different-metal material welding molten bath both sides recess | |
| CN112518062A (en) | Laser alternate wire filling welding method for regulating and controlling dissimilar joint elements | |
| 崔凌越 et al. | Microstructure and mechanical properties of laser welding-brazed aluminum alloy to steel with CuSi3 filler metal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |