CN115255709A - Preparation method of flux-cored solder ring with flux guiding function and flux-cored solder ring - Google Patents
Preparation method of flux-cored solder ring with flux guiding function and flux-cored solder ring Download PDFInfo
- Publication number
- CN115255709A CN115255709A CN202211085496.8A CN202211085496A CN115255709A CN 115255709 A CN115255709 A CN 115255709A CN 202211085496 A CN202211085496 A CN 202211085496A CN 115255709 A CN115255709 A CN 115255709A
- Authority
- CN
- China
- Prior art keywords
- flux
- brazing
- solder
- filler metal
- cored
- 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.)
- Pending
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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
- B23K35/0227—Rods, wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
Abstract
The invention belongs to the field of flux-cored brazing filler metal, and particularly relates to a preparation method of a flux-cored brazing filler metal ring with a brazing flux guiding effect and the flux-cored brazing filler metal ring. The flux-cored brazing ring the preparation method comprises the following steps: (1) A plurality of flux guide holes which are arranged at intervals are formed in the first brazing filler metal strip along the length direction; (2) The first brazing filler metal strip and the second brazing filler metal strip are rolled up and down, forming a composite brazing filler metal skin with a two-layer brazing filler metal structure; (3) Processing the composite brazing sheet into a U-shaped belt, feeding core brazing flux into a notch of the U-shaped belt, and overlapping to form a lap seam flux-cored wire; (4) rolling the flux-cored wire into a flux-cored solder ring; and (5) coating a flux protective layer on the flux-cored solder ring. During brazing, the second brazing filler metal strip is melted and the flux guide holes are kept away, so that the flux is guided to spread and wet in the whole circumferential direction through the plurality of circumferentially arranged flux guide holes, and the brazing effect of the flux-cored brazing filler metal ring in the whole circumferential direction is improved.
Description
Technical Field
The invention belongs to the field of flux-cored brazing filler metals, and particularly relates to a preparation method of a flux-cored brazing filler metal ring with a brazing flux guiding effect and the flux-cored brazing filler metal ring.
Background
The flux-cored brazing filler metal compounded by the brazing flux is a brazing filler metal with a novel structure developed in recent years, and the brazing filler metal of the type realizes timing, positioning, quantifying, temperature setting and directional wetting on a base metal in the brazing process, and accords with the development directions of green manufacturing and intelligent manufacturing.
The basic structure of the flux-cored solder comprises a solder outer skin and a flux inner core, and the flux is wrapped by the flux outer skin to prepare a composite solder with butt joint, lap joint or seamless structure. The flux-cored solder is coiled into a ring, so that the flux-cored solder ring with a butt joint (fracture) can be formed. The flux-cored brazing filler metal ring is suitable for connecting round pipe fittings with different pipe diameters, when the flux-cored brazing filler metal ring is used, the two round pipe fittings are inserted, the flux-cored brazing filler metal ring is arranged at the insertion gap, and the brazing connection of the round pipe fittings with different pipe diameters can be realized through heating welding. The flux-cored brazing filler metal ring is adopted to realize automatic and synergistic addition of the brazing flux, and is widely applied to refrigeration industries such as air conditioners, refrigerators and the like by combining the development of an automatic brazing technology.
As shown in fig. 1, the flux-cored solder ring 100 of the prior art is mainly used in that the flux 300 is decomposed and melted and generates gas when being heated during soldering, and the flux melted by the gas is mainly released from the soldering interface 200 (fracture) with small resistance due to small resistance of the soldering seam and the lap seam, so that the flux is not spread in the circumferential direction of the substrate to be soldered, the oxide film in the circumferential direction of the substrate cannot be removed, and the solder cannot be spread in the circumferential direction. This will further cause the flux-cored solder ring to be too much to the soldering flux at the interface, other parts basically have no soldering flux and the solder is basically not wet and not joint, the brazing rate is extremely low, finally cause the welding failure.
Disclosure of Invention
The invention aims to provide a preparation method of a flux-cored solder ring with a flux guiding effect, and the obtained flux-cored solder ring can improve the circumferential spreading and wetting effect of a flux and improve the soldering effect of a solder in the whole circumferential direction.
The second purpose of the invention is to provide the flux-cored solder ring prepared by the method.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a preparation method of a flux-cored brazing ring with brazing flux guiding effect comprises the following steps:
(1) A plurality of flux guide holes which are arranged at intervals are formed in the first brazing filler metal strip along the length direction;
(2) The first brazing filler metal strip and the second brazing filler metal strip are rolled up and down to form a composite brazing filler metal skin with a two-layer brazing filler metal structure;
(3) Processing the composite brazing sheet into a U-shaped belt with a first brazing tape positioned at the inner side, sending the core brazing flux into a notch of the U-shaped belt, and overlapping to form an overlapping seam flux-cored wire;
(4) Rolling the flux-cored wire into a flux-cored solder ring;
(5) Coating a brazing flux protective layer on the flux-cored brazing filler metal ring;
during brazing, the brazing flux protective layer, the second brazing filler metal strip, the core brazing flux and the first brazing filler metal strip are sequentially melted, and the second brazing filler metal strip is melted to form a brazing flux guide hole and guide the brazing flux of the core to flow out of the brazing flux guide hole; and the second brazing filler metal strip and the first brazing filler metal strip form an alloying brazing filler metal during brazing.
According to the preparation method of the flux-cored brazing ring with the brazing flux guiding effect, when a product is produced, transported and stored, the second brazing material belt plugs the brazing flux guiding holes in the first brazing material belt, so that leakage is avoided; during brazing, the second brazing filler metal strip is melted and the flux guide holes are kept away, so that the flux is guided to spread and wet in the whole circumferential direction through the plurality of circumferentially arranged flux guide holes, and the brazing effect of the flux-cored brazing filler metal ring in the whole circumferential direction is improved.
The diameter of the flux guiding hole is D, the inner diameter of the flux-cored wire is D, and D satisfies the following conditions: d is more than or equal to 0.3D and less than or equal to 0.7D; the hole edge distance of the flux guide hole is d Edge ，d Edge Satisfies the following conditions: d is not less than 4d Edge Less than or equal to 6 days. The diameter of the flux guide hole is designed according to the mode, so that the effect of preventing the welding ring from moving in the welding process can be achieved. During welding, the soldering flux is heated and decomposed, the generated gas mainly escapes from the port part, the gas pressure is higher, and the welding ring moves upwards under the pushing action of unbalanced gas pressure. After the flow guide holes with the sizes are formed, on one hand, the pressure relief openings are increased, air pressure can be reduced, on the other hand, the flux flow guide holes can be uniformly distributed along the circumferential direction, the air pressure can be uniformly dispersed along the circumferential direction, and therefore the welding ring can be prevented from moving, and welding quality is guaranteed. If the aperture d is too small, the processing difficulty is increased, the flux flows out, the pressure relief is blocked, and if the aperture is too large, the processing difficulty of the brazing filler metal ring is increased. Hole edge distance d Edge Too small results in difficult processing of the rings and too large a hole edge distance results in poor flux across the imperforate area, i.e., flux from two adjacent holes does not merge well in the imperforate area.
Preferably, the first solder strip is a silver-based solder or a copper-based solder, and the second solder strip is a low-melting-point alloy consisting of one or more of Sn, in, ga, bi, sb and Pb. The silver-based solder can be silver-copper-zinc system solder, silver-copper-tin system solder, silver-copper-zinc-cadmium system solder and silver-copper-zinc-nickel system solder. Specifically, BAg35CuZn, BAg40CuZn, BAg45CuZn, BAg40CuZnSn, BAg35CuZnSn, BAg30CuZnSn, BAg25CuZnSn, BAg18CuZnSn, BAg20CuZnCd, BAg25CuZnCd, BAg40CuZnNi, BAg25CuZnNiMn and the like can be mentioned. The copper-based solder can be a copper-zinc-based solder or a copper-phosphorus-based solder. Specifically, BCu60Zn, BCu60ZnSn, BCu54Zn, BCu92P, BCu P, BCu PAg and the like can be mentioned. The low melting point alloy may be Sn-In, sn-Ga, sn-Bi-In, or the like. In the actual solder manufacturing process, if low-melting-point metals related to the second solder strip are directly added into the first solder strip, brittle compounds can be formed after the content of the low-melting-point metals exceeds 1%, the plasticity can be greatly reduced, so that in subsequent processing links of the solder strip, such as drawing, bending and other links, the processing performance of the solder strip can be deteriorated, the problems of strip breakage, cracking and the like occur, and the solder can be hardly formed. The low-melting-point metals are made into an independent second brazing filler metal layer, so that the forming performance of the first brazing filler metal strip can be improved on the basis of ensuring that the diffusion alloying brazing filler metal can be formed and the wettability of the brazing filler metal is improved, the processing difficulty is reduced, and the yield of industrial production is improved.
Further, the mass percentage of the second brazing filler metal strip in the composite brazing filler metal skin composed of the first brazing filler metal strip and the second brazing filler metal strip is 6-20%. According to the method, not only can the flux-cored solder ring with the flux guiding function be manufactured, but also the flux-cored solder ring with low melting speed flow pattern such as high tin, high indium and the like can be manufactured, so that the wettability of the solder ring can be further improved, the gap filling property of the solder can be improved, and the soldering quality can be ensured.
Preferably, the brazing flux protective layer is rosin-based flux; the core brazing flux consists of the following components in percentage by mass: k 2 [(OH)F 4 B 3 O 3 ]50-70% of potassium fluoborate, 10-20% of potassium tetraborate and 5-20% of borax. The rosin-based flux can protect the second solder layer. The core brazing flux adopts K which is not moisture-absorbing 2 [(OH)F 4 B 3 O 3 ]The composition is prepared by reacting potassium bifluoride with boric acid, can effectively prevent the soldering flux from absorbing moisture, and can further optimize the film removing and protecting effects of the soldering flux by matching with potassium fluoroborate, potassium tetraborate and borax.
The flux-cored solder ring is provided with a butt joint port and two butt joint ends positioned at the butt joint port, the butt joint ends are provided with an opening and a closing structure which is gradually contracted close to the opening, and the diameter of the opening is larger than the radius of the flux guide hole and smaller than the diameter of the flux guide hole. The butt joint end adopts a closing-up structure, the flux can be further reduced to flow out from the butt joint end, the flux flow out from the flux guide hole is increased, and the spreading effect of the flux in the whole circumferential direction is further optimized. The opening is designed according to the mode, so that the flux-cored brazing filler metal ring butt joint end can be ensured to have a proper amount of brazing flux to flow out, the wetting joint filling performance of the brazing filler metal at the butt joint end is ensured, meanwhile, the resistance of the butt joint end can be improved, the brazing flux is prevented from flowing out from the butt joint end in a large amount, and the brazing flux can uniformly flow out from the flow guide hole.
The technical scheme of the flux-cored brazing ring with brazing flux guiding function is as follows:
the flux-cored wire comprises a ring body formed by coiling a flux-cored wire, wherein the flux-cored wire comprises a composite brazing filler metal skin with a two-layer brazing filler metal structure and a brazing flux inner core wrapped in the composite brazing filler metal skin, the composite brazing filler metal skin comprises a first brazing filler metal layer and a second brazing filler metal layer which are compounded from inside to outside, the first brazing filler metal layer and the second brazing filler metal layer form the two-layer brazing filler metal structure, and the composite brazing filler metal skin is provided with a lap joint; a plurality of flux guiding holes are formed in the first brazing filler metal layer at intervals along the ring forming direction of the flux-cored brazing filler metal ring; a brazing flux protective layer is coated outside the composite brazing filler metal sheath;
during brazing, the brazing flux protective layer, the second brazing flux belt, the core brazing flux and the first brazing flux belt are sequentially melted, and the second brazing flux belt is melted to form a brazing flux guide hole and guide the core brazing flux to flow out of the brazing flux guide hole; and forming an alloying brazing filler metal when the second brazing filler metal strip and the first brazing filler metal strip are brazed.
The flux-cored solder ring with the flux guiding function improves the spreading and wetting effect of the flux in the circumferential direction, optimizes the soldering and connecting effect in the whole circumferential direction, and ensures the stability and reliability of the flux-cored solder ring in use. By adopting the structural design of the guide holes, the flux can be guided to flow to the splicing position of two workpieces to be welded, and the infiltration effect of the flux is further improved.
Preferably, the ring body comprises an inner ring formed by the first brazing material layer, the flux guiding holes being provided at a ring inner side and/or a ring lower side of the inner ring.
Preferably, the first solder strip is a silver-based solder or a copper-based solder, and the second solder strip is a low-melting-point alloy consisting of one or more of Sn, in, ga, bi, sb and Pb.
Preferably, the flux-cored solder ring has a butt joint port and two butt joint ends positioned at the butt joint port, and the butt joint ends have an opening and a closing structure gradually shrinking close to the opening. Further preferably, the diameter of the opening is larger than the radius of the flux guiding hole and smaller than the diameter of the flux guiding hole.
Drawings
FIG. 1 is a diagram illustrating the effect of the prior art solder ring with a wick;
FIG. 2 is a cross-sectional view of a flux cored solder ring having flux guiding function according to example 2 of the present invention;
FIG. 3 is a schematic structural view of a first solder layer in example 2;
FIG. 4 is a schematic structural view of a first solder layer of the flux cored solder ring of example 3 of the present invention;
wherein, 100-the flux core brazing ring; 200-pair of interfaces; 300-soldering flux; 1-composite brazing filler metal skin; 11-a first solder layer; 12-a second solder layer; 2-core brazing flux; 3-a flux protection layer; 4-flux guiding holes.
Detailed Description
The following describes the practice of the present invention in detail with reference to specific examples.
1. Specific embodiment of preparation method of flux-cored solder ring with flux guiding function
Example 1
The preparation method of the flux-cored solder ring with the flux guiding function comprises the following steps:
(1) Preparing a first brazing filler metal strip and a second brazing filler metal strip. The first brazing filler metal strip is BAg35CuZn brazing filler metal and is 0.3mm thick; the second brazing filler metal strip is an Sn layer, and the thickness of the second brazing filler metal strip is 0.05mm.
(2) Carry out laser beam drilling along the length direction in first brazing filler metal area, form the circular port along length direction interval arrangement on first brazing filler metal area, the circular port is located brazing filler metal area width direction's middle part, and the width in brazing filler metal area is 9mm, and the diameter d of circular port is 1.2mm, hole edge distance d between the adjacent circular port Edge The diameter is 6mm, and the circular hole forms a flux guide hole. The middle part is provided with a hole, which is convenient for the positioning processing of the flux guide hole and can reduce the subsequent coiling of fluxThe edges of the solder strip crack during the core wire and ring making.
The laser drilling has the advantages of small heat affected zone, high precision, high speed and the like, can effectively improve the processing precision and efficiency, reduces the heat influence on the brazing filler metal sheet, and ensures the production quality.
(3) And (3) performing lap rolling on the first brazing filler metal strip and the second brazing filler metal strip to form a composite brazing filler metal skin. The mass percentage of the second brazing filler metal strip in the brazing filler metal skin formed by the first brazing filler metal strip and the second brazing filler metal strip is 12%.
(4) And (3) manufacturing the composite brazing sheet into a U-shaped belt, then feeding the core brazing flux into a notch of the U-shaped belt, and overlapping to form the lap seam flux-cored wire. The inner diameter D of the lap seam flux-cored wire is 2.5mm.
The core brazing flux consists of the following components in percentage by mass: k is 2 [(OH)F 4 B 3 O 3 ]70 percent of potassium fluoborate, 10 percent of potassium tetraborate and 10 percent of borax. K 2 [(OH)F 4 B 3 O 3 ]The preparation method is described in the Chinese invention patent with the publication number CN 110744222B. Will K 2 [(OH)F 4 B 3 O 3 ]The potassium fluoborate, the potassium tetraborate and the borax are uniformly mixed to be used for filling powder.
(5) And coiling the flux-cored wire into a flux-cored solder ring, then placing the flux-cored solder ring into the pasty rosin-based soldering flux, and taking out the flux-cored solder ring.
The rosin-based soldering flux adopts a conventional variety sold in the market. In other embodiments, the preparation can also be carried out according to the prior art.
On the basis of the embodiment, the first solder layer can be a conventional silver-based solder such as BAg40CuZn, BAg45CuZn, BAg40CuZnSn, BAg35CuZnSn, BAg30CuZnSn, BAg25CuZnSn, BAg18CuZnSn, BAg20CuZnCd, BAg25CuZnCd, BAg40CuZnNi, BAg25CuZnNiMn and the like, and the second solder layer can be Sn, in, ga, bi, sb, pb, sn-In alloy, sn-Ga alloy, sn-Bi-In alloy and the like, and can play a role of a corresponding alloying solder.
Example 2
The difference between the preparation method of the flux-cored solder ring with flux guiding function in the embodiment and the embodiment 1 is that: the diameter d of the flux guide hole is 1.5mm; the first brazing filler metal strip is BAg45CuZn, and the thickness of the first brazing filler metal strip is 0.5mm; the second brazing material belt is In and has the thickness of 0.04mm; the mass percentage of the second brazing filler metal strip in the composite brazing filler metal sheath is 6%.
Example 3
The difference between the preparation method of the flux-cored solder ring with flux guiding function in the embodiment and the embodiment 1 is that: the diameter d of the flux guide hole is 1mm; the first brazing filler metal strip is BCu60ZnSn, and the thickness is 0.3mm; the second brazing material belt is Sn, and the thickness of the second brazing material belt is 0.1mm; the mass percentage of the second brazing filler metal strip in the composite brazing filler metal sheath is 20%.
2. Specific embodiment of flux-cored brazing ring with brazing flux guiding function
Example 4
The flux-cored solder ring having a flux guiding function of the present example is a product obtained by the method of example 1, and a schematic structural diagram thereof is shown in fig. 2, and includes a composite solder skin 1 having a two-layer solder structure, a core solder 2, and a solder protective layer 3.
The composite brazing filler metal sheath 1 comprises a first brazing filler metal layer 11 and a second brazing filler metal layer 12 which are compounded inside and outside, and the first brazing filler metal layer 11 and the second brazing filler metal layer 12 are rolled and compounded into an integral structure. As shown in fig. 3, a plurality of circular flux guiding holes 4 are formed at intervals on the first solder layer 11 along the ring forming direction of the flux-cored solder ring, and the second solder layer 12 having the same size as the first solder layer 11 seals the flux guiding holes 4 after the first solder layer 11 is compounded. The composite brazing sheet is of a lap joint seam structure, and the brazing flux guide hole 4 is formed in the bottom wall of the ring body formed by the first brazing sheet layer and guides the brazing flux to spread to the deep part of the insertion port during brazing. In other embodiments, the flux guiding holes 4 may be formed in the inner sidewall of the ring body formed by the first brazing material layer to guide the flux to flow to the insertion position of the two workpieces to be welded during brazing.
The powder leakage of the butt joint flux-cored solder in the coiling process is very easy to occur, and the powder leakage problem in the coiling process can be effectively solved by adopting the lap joint structure. The brazing flux protective layer 3 is coated on the outer surface of the composite brazing flux skin, and the brazing flux protective layer 3 is rosin-based soldering flux.
Example 5
The flux-cored solder ring with flux guiding function of this embodiment is basically the same as the structure of embodiment 4, except that the butt joint end of the composite solder skin at the butt joint port is in a closed-up structure, the structure diagram of the first solder layer is shown in fig. 4, and the two butt joint ends have an opening and a closed-up structure gradually shrinking close to the opening.
The diameter of the opening is larger than the radius of the flux guide hole and smaller than the diameter of the flux guide hole. The opening size is designed according to the design, so that the flux-cored brazing filler metal ring butt joint end can be ensured to have a proper amount of brazing flux to flow out, the wetting joint filling property of the brazing filler metal at the butt joint end is ensured, meanwhile, the resistance of the butt joint end can be improved, the brazing flux is prevented from flowing out from the butt joint end in a large amount, and the brazing flux can uniformly flow out from the flow guide hole.
3. Examples of the experiments
In order to examine the brazing effect of the flux-cored solder ring provided in the example and the conventional flux-cored solder ring in fig. 1, a copper tube-brass tube seat was brazed by using the flux-cored solder ring of example 1 and the conventional flux-cored solder ring, respectively, wherein the solder skin of the conventional flux-cored solder was a BAg35CuZn solder having a width of 9mm, the core solder was the same as that of example 1, sawing was performed after the welding, the joint filling condition of the weld was observed, and the brazing seam attachment rate (effective joint filling length/nominal joint filling length on the planning surface) was estimated, the effective joint filling length was the joint filling length of the actual solder, and the nominal joint filling length was the joint filling length theoretically required, as shown in table 1.
TABLE 1 different flux cored solder ring joint filling conditions
As can be seen from table 1, the flux-cored solder ring provided by the embodiment of the present invention can enable the solder to flow and spread along the circumferential direction of the pipe due to the effect of the solder diversion hole, so that the solder can be uniformly filled along the circumferential direction, and the brazing percentage is significantly increased. In addition, the traditional flux-cored brazing ring generates obvious float during brazing, which aggravates the nonuniformity of brazing flux spreading and causes the stability of welding effect to be reduced. The flux-cored solder ring provided by the embodiment of the invention has no play phenomenon.
Claims (10)
1. The preparation method of the flux-cored brazing ring with the brazing flux guiding effect is characterized by comprising the following steps of:
(1) A plurality of flux guide holes which are arranged at intervals are formed in the first brazing filler metal strip along the length direction;
(2) The first brazing filler metal strip and the second brazing filler metal strip are rolled up and down to form a composite brazing filler metal skin with a two-layer brazing filler metal structure;
(3) Processing the composite brazing sheet into a U-shaped belt with a first brazing tape positioned at the inner side, sending the core brazing flux into a notch of the U-shaped belt, and overlapping to form an overlapping seam flux-cored wire;
(4) Rolling the flux-cored wire into a flux-cored solder ring;
(5) Coating a brazing flux protective layer on the flux-cored brazing filler metal ring;
during brazing, the brazing flux protective layer, the second brazing flux belt, the core brazing flux and the first brazing flux belt are sequentially melted, and the second brazing flux belt is melted to form a brazing flux guide hole and guide the core brazing flux to flow out of the brazing flux guide hole; and the second brazing filler metal strip and the first brazing filler metal strip form an alloying brazing filler metal during brazing.
2. The method of claim 1, wherein the diameter of the flux guiding hole is D, the inner diameter of the flux-cored wire is D, and D satisfies: d is more than or equal to 0.3D and less than or equal to 0.7D; the hole edge distance of the flux guide hole is d Edge ，d Edge Satisfies the following conditions: d is not less than 4d Edge ≤6d。
3. The method for preparing a flux-cored solder ring with flux guiding function according to claim 1, wherein the first solder strip is silver-based solder or copper-based solder, and the second solder strip is a low melting point alloy selected from one or more of Sn, in, ga, bi, sb, and Pb.
4. The method for preparing the flux-cored solder ring with the flux guiding function of claim 3, wherein the mass percentage of the second solder strip in the composite solder skin consisting of the first solder strip and the second solder strip is 6-20%.
5. The method of making a flux cored solder ring with flux guiding effect of any of claims 1-4, wherein the flux protective layer is a rosin based flux; the core brazing flux consists of the following components in percentage by mass: k 2 [(OH)F 4 B 3 O 3 ]50-70% of potassium fluoborate, 10-20% of potassium tetraborate and 5-20% of borax.
6. A flux-cored solder ring with flux guiding function is characterized by comprising a ring body formed by winding a flux-cored wire, wherein the flux-cored wire comprises a composite solder skin with a two-layer solder structure and a solder inner core wrapped in the composite solder skin, the composite solder skin comprises a first solder layer and a second solder layer which are compounded from inside to outside, the first solder layer and the second solder layer form the two-layer solder structure, and the composite solder skin is provided with lap joints; a plurality of flux guiding holes are formed in the first brazing filler metal layer at intervals along the ring forming direction of the flux-cored brazing filler metal ring; a brazing flux protective layer is coated outside the composite brazing filler metal sheath;
during brazing, the brazing flux protective layer, the second brazing flux belt, the core brazing flux and the first brazing flux belt are sequentially melted, and the second brazing flux belt is melted to form a brazing flux guide hole and guide the core brazing flux to flow out of the brazing flux guide hole; and the second brazing filler metal strip and the first brazing filler metal strip form an alloying brazing filler metal during brazing.
7. The flux cored solder ring with flux guiding effect of claim 6, wherein the ring body comprises an inner ring formed of the first solder layer, the flux guiding holes being provided at an inner side of the inner ring and/or an underside of the ring.
8. The flux-cored solder ring with flux guiding effect of claim 6, wherein the first solder ribbon is silver-based solder or copper-based solder, and the second solder ribbon is selected from low melting point alloys consisting of one or more of Sn, in, ga, bi, sb and Pb.
9. The flux-cored solder ring with flux guiding effect of any one of claims 6 to 8, wherein the flux-cored solder ring has a butt joint port and two butt joint ends at the butt joint port, the butt joint ends having an opening and a gradually shrinking closing structure near the opening.
10. The flux cored solder ring having a flux guiding effect of claim 9, wherein the diameter of the opening is larger than the radius of the flux guiding hole and smaller than the diameter of the flux guiding hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211085496.8A CN115255709A (en) | 2022-09-06 | 2022-09-06 | Preparation method of flux-cored solder ring with flux guiding function and flux-cored solder ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211085496.8A CN115255709A (en) | 2022-09-06 | 2022-09-06 | Preparation method of flux-cored solder ring with flux guiding function and flux-cored solder ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115255709A true CN115255709A (en) | 2022-11-01 |
Family
ID=83756021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211085496.8A Pending CN115255709A (en) | 2022-09-06 | 2022-09-06 | Preparation method of flux-cored solder ring with flux guiding function and flux-cored solder ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115255709A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004223588A (en) * | 2003-01-24 | 2004-08-12 | Furukawa Sky Kk | Brazing sheet for aluminum brazing and its manufacturing method |
| JP2011104632A (en) * | 2009-11-19 | 2011-06-02 | Mitsubishi Electric Corp | Ring brazing filler metal and method of manufacturing the same |
| CN105834609A (en) * | 2016-05-04 | 2016-08-10 | 桂林市庆通有色金属工艺材料开发有限公司 | Continuous brazing composite aluminum-based brazing wire applying nanometer aluminum trioxide and preparation method of continuous brazing composite aluminum-based brazing wire applying nanometer aluminum trioxide |
| CN107617829A (en) * | 2017-10-31 | 2018-01-23 | 珠海格力电器股份有限公司 | A kind of braze-welding rings and soldering system |
| CN110744222A (en) * | 2019-10-18 | 2020-02-04 | 郑州机械研究所有限公司 | Brazing flux not prone to moisture absorption and preparation method thereof |
| CN111468857A (en) * | 2020-04-15 | 2020-07-31 | 郑州机械研究所有限公司 | Composite solder and preparation method and application thereof |
| CN211661367U (en) * | 2020-02-28 | 2020-10-13 | 天津市捷东焊材有限公司 | Aluminum welding wire with brazing flux |
| CN112894192A (en) * | 2021-01-20 | 2021-06-04 | 郑州机械研究所有限公司 | Coating brazing filler metal and preparation method and application thereof |
| CN113732559A (en) * | 2021-09-22 | 2021-12-03 | 郑州机械研究所有限公司 | Composite brazing filler metal and preparation method thereof |
| CN114310029A (en) * | 2022-03-08 | 2022-04-12 | 中机智能装备创新研究院(宁波)有限公司 | Variable-gap and large-gap composite brazing filler metal and preparation method thereof |
-
2022
- 2022-09-06 CN CN202211085496.8A patent/CN115255709A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004223588A (en) * | 2003-01-24 | 2004-08-12 | Furukawa Sky Kk | Brazing sheet for aluminum brazing and its manufacturing method |
| JP2011104632A (en) * | 2009-11-19 | 2011-06-02 | Mitsubishi Electric Corp | Ring brazing filler metal and method of manufacturing the same |
| CN105834609A (en) * | 2016-05-04 | 2016-08-10 | 桂林市庆通有色金属工艺材料开发有限公司 | Continuous brazing composite aluminum-based brazing wire applying nanometer aluminum trioxide and preparation method of continuous brazing composite aluminum-based brazing wire applying nanometer aluminum trioxide |
| CN107617829A (en) * | 2017-10-31 | 2018-01-23 | 珠海格力电器股份有限公司 | A kind of braze-welding rings and soldering system |
| CN110744222A (en) * | 2019-10-18 | 2020-02-04 | 郑州机械研究所有限公司 | Brazing flux not prone to moisture absorption and preparation method thereof |
| CN211661367U (en) * | 2020-02-28 | 2020-10-13 | 天津市捷东焊材有限公司 | Aluminum welding wire with brazing flux |
| CN111468857A (en) * | 2020-04-15 | 2020-07-31 | 郑州机械研究所有限公司 | Composite solder and preparation method and application thereof |
| CN112894192A (en) * | 2021-01-20 | 2021-06-04 | 郑州机械研究所有限公司 | Coating brazing filler metal and preparation method and application thereof |
| CN113732559A (en) * | 2021-09-22 | 2021-12-03 | 郑州机械研究所有限公司 | Composite brazing filler metal and preparation method thereof |
| CN114310029A (en) * | 2022-03-08 | 2022-04-12 | 中机智能装备创新研究院(宁波)有限公司 | Variable-gap and large-gap composite brazing filler metal and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9656352B2 (en) | Flux composition for brazing | |
| EP1475598B1 (en) | Heat exchange tube | |
| KR20110063307A (en) | Brazing material | |
| US20110123824A1 (en) | Brazing material | |
| JP2010085081A (en) | Heat exchanger made of aluminum alloy | |
| CN109093288A (en) | The medicine core silver solder of easy processing | |
| CN106975819B (en) | A kind of Ni-based composite bimetal pipe all-position automatic soldering method | |
| JP2010253511A (en) | Method of welding circumference of fixed steel pipe | |
| WO2021223781A3 (en) | Multilayered flux-cored silver brazing material and production method therefor | |
| CN104972242A (en) | Self soldering flux-cored wire for aluminum/steel melt-soldering | |
| CN105081599A (en) | Flux-cored brazing rod with protective film and preparation method thereof | |
| CN110936064A (en) | Flux-cored silver brazing filler metal | |
| WO2019058650A1 (en) | Solder alloy for bonding cu pipes and/or fe pipes, preform solder, resin flux cored solder, and solder joint | |
| CN115255709A (en) | Preparation method of flux-cored solder ring with flux guiding function and flux-cored solder ring | |
| CN215658547U (en) | Flux-cored brazing filler metal | |
| JP3589917B2 (en) | Flux-cored wire for duplex stainless steel welding | |
| CN112091477B (en) | High-performance composite brazing material with low brazing flux residue | |
| CN218016550U (en) | Composite brazing filler metal structure | |
| JP3244404U (en) | flux core ring | |
| EP2796236A1 (en) | Method for manufacturing heat exchanger and heat exchanger obtained by same | |
| CN211516466U (en) | Flux-cored silver brazing filler metal | |
| CN110936065A (en) | Novel flux-cored silver solder | |
| CN215699049U (en) | Coating welding ring | |
| CN204843292U (en) | From brass medicine core brazing filler metal of taking reductant, flow aid | |
| CN211346483U (en) | Heat exchanger |
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 |