CN108044252B - Impact-resistant flux-cored composite brazing cake with spiral framework and preparation method thereof - Google Patents
Impact-resistant flux-cored composite brazing cake with spiral framework and preparation method thereof Download PDFInfo
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- CN108044252B CN108044252B CN201711472723.1A CN201711472723A CN108044252B CN 108044252 B CN108044252 B CN 108044252B CN 201711472723 A CN201711472723 A CN 201711472723A CN 108044252 B CN108044252 B CN 108044252B
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- 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
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0277—Rods, electrodes, wires of non-circular cross-section
-
- 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
- B23K35/0233—Sheets, foils
- B23K35/0238—Sheets, foils layered
-
- 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 utility model provides a take flux core composite brazing filler metal of spiral skeleton shock resistance and its preparation method, brazing filler metal cake include narrow-band flux core brazing filler metal and narrow-band material, the brazing filler metal of narrow-band flux core includes brazing filler metal outer layer and brazing flux core packed in brazing filler metal outer layer, brazing filler metal outer layer is according to the weight portion, including 44-46 parts Ag, 24-26 parts Zn and 28-30 parts Cu, and make the tubular structure with spiral lap seam by the banded brazing filler metal rotary winding that is prepared according to above-mentioned proportion of Ag, cu, zn, the brazing flux core includes silver brazing flux core, the narrow-band material is copper-nickel alloy; the narrow-band flux-cored brazing filler metal and the narrow-band alloy are continuously wound together at intervals and clamped into a disc shape, so that the brazing filler metal has good rigidity and structural stability, the silver-copper-zinc brazing filler metal reacts with part of CuNi alloy to generate CuNiAgZn alloy during brazing, the strength of a brazing seam can be improved, a spiral copper-nickel alloy isolation belt is left after brazing, the stress can be greatly released, and the shock resistance of a hard alloy tool is greatly improved.
Description
Technical Field
The invention relates to the field of brazing materials, in particular to a flux-cored composite brazing cake with a spiral framework and impact resistance and a preparation method thereof.
Background
Cemented carbide is a composite material made of refractory metal compounds (such as WC, tiC, taC, nbC, VC and TiN) with high hardness and binding metal (Co, ni, mo, fe, etc.) by a powder metallurgy process, has extremely high hardness, wear resistance and thermosetting property, and is an important wear-resistant material in the modern industry. Cemented carbide is widely used in metal cutting tools, mining, cutting picks, rock drilling, oil drilling, geological exploration tools, drawing, extrusion, stamping dies and other industries. Because the hard alloy is relatively expensive and has poor plasticity and impact toughness, most of hard alloy is applied in the form of adopting small hard alloy as an insert and attaching to the working parts of parts made of high-strength steel such as structural steel, tool steel and the like; and the high-strength steel bears impact load, saves expensive hard alloy and reduces manufacturing cost. Common methods for joining cemented carbides to steel are: brazing, mechanical clamping, stress-insert and bonding are among the most widely used methods for firmly connecting cemented carbides to steel, and are also one of the most successful methods.
The sandwich composite brazing filler metal is novel stress relief brazing filler metal for high-grade precise hard alloy tools or large-area hard alloy brazing in recent years, the core of the brazing filler metal consists of pure copper, copper-manganese alloy or copper-zinc alloy, and is externally coated with silver-based brazing filler metal, the volume ratio of three materials of the most common brazing filler metal in the market is 1:2:1 respectively, in the brazing process, the core material is not melted, only the external silver-based brazing filler metal is melted, the thickness of a brazing seam is increased by the unmelted high-plasticity copper alloy, the thermal stress generated by mismatch of the thermal expansion coefficients of the hard alloy and a steel matrix in the brazing joint can be effectively relieved by elastoplastic deformation of the high-plasticity copper alloy, the residual stress is reduced, the bonding strength of the brazing seam is improved, and the crack tendency of the hard alloy is greatly reduced. The traditional brazing process adopts sandwich composite brazing filler metal soldering flux, the brazing filler metal soldering flux is coated on a workpiece in advance before use or heating, the operation of the brazing filler metal soldering flux or the brazing filler metal soldering flux coating in advance increases the working procedures before welding and the operation time, and a variable is added in the brazing process, so that the consistency of welding and the stability of quality are influenced, excessive brazing filler metal has to be added to ensure the brazing quality, brazing filler metal waste is caused, brazing filler metal residues are difficult to clean, and joints are easy to corrode; the brazing process is complex, the production efficiency is low, the consumption of the brazing flux is not easy to accurately control, excessive or uneven brazing flux addition occurs frequently, the welding quality of the joint depends on the level of an operator, and defects are easy to generate. In the existing sandwich composite solder and the preparation method thereof, the composite solder has a three-layer structure, two outer layers are silver solder, a core part is copper alloy, the preparation method of the composite solder is three-layer laminated rolling compounding, diffusion welding heat treatment between compounding surfaces is carried out, and finally finish rolling is carried out to obtain a finished product with the thickness of 0.3 mm; however, the method has the defects of complex forming process, multiple processes, diffusion welding heat treatment and limitation of diffusion welding heat treatment equipment, and has low production efficiency and relatively high cost.
Disclosure of Invention
The invention aims to solve the defects of the technical problems, and provides an impact-resistant flux-cored composite brazing cake with a spiral framework and a preparation method thereof, and aims to solve the problems that a brazing process is complex, production efficiency is low, the dosage of brazing flux is not easy to accurately control, and excessive or uneven brazing flux addition occurs frequently in a brazing process.
The invention adopts the technical proposal for solving the technical problems that: the utility model provides a take flux core composite brazing filler metal of spiral skeleton shock resistance, the brazing filler metal cake is twined by narrowband flux core brazing filler metal and narrowband material interval and is constituteed plane double helix, clearance between narrowband flux core brazing filler metal and the narrowband material is less than or equal to 0.1 mm; the narrow-band flux-cored brazing filler metal comprises a brazing filler metal outer layer and a flux core filled in the brazing filler metal outer layer, wherein the brazing filler metal outer layer comprises, by weight, 44-46 parts of Ag, 24-26 parts of Zn and 28-30 parts of Cu, a tubular structure with spiral lap joints is formed by rotationally rolling strip-shaped brazing filler metal prepared from the Ag, the Cu and the Zn which are prepared according to the proportion, the flux core comprises a silver flux core, and the narrow-band material is copper-nickel alloy.
Further, when the brazing filler metal outer layer is rolled, 0.01-0.025 parts of rare earth is added into the Ag, cu and Zn strip brazing filler metal according to parts by weight.
Furthermore, the cross sections of the narrow-band flux-cored solder and the narrow-band material are trapezoidal.
Furthermore, the cross sections of the narrow-band flux-cored solder and one end of the narrow-band material are semicircular grooves, and the cross sections of the other end of the narrow-band flux-cored solder and the other end of the narrow-band material are drum-shaped.
Further, the thickness of the brazing cake is 0.1-3 mm.
Further, the preparation method of the drug core composite brazing cake with the spiral framework and impact resistance comprises the following steps:
(1) Weighing 44-46 parts of Ag, 24-26 parts of Zn and 28-30 parts of Cu according to parts by weight, casting into a brazing filler metal cast ingot, cutting off a riser and turning the cast ingot to remove oxide skin for later use;
(2) Placing the solder cast ingot in the step (1) in a muffle furnace at 460-480 ℃ for preheating, and placing the preheated solder cast ingot into extrusion equipment for extrusion to form strip solder;
(3) Rotating and rolling the strip-shaped brazing filler metal in the step (2) into a tubular structure with spiral lap joints;
(4) Putting the silver soldering flux core into the tubular structure prepared in the step (3), and pressing into a narrow band to form a narrow band flux core solder for standby;
(5) Taking copper-nickel alloy ingots, cutting off a riser, turning the ingot to remove oxide skin, placing the ingot in a muffle furnace at 460-480 ℃ for preheating, and placing the ingot in extrusion equipment for extrusion into a narrow-band material for standby;
(6) And (3) winding the narrow-band flux-cored solder prepared in the step (4) and the narrow-band material prepared in the step (5) at intervals to form double spirals, mutually clamping the double spirals into a disc shape, and cutting off the double spirals after winding is finished to obtain the flux-cored composite flux-cored cake with the spiral skeleton and impact resistance.
Further, in the step (6), a winding device is used in the winding process, the winding device comprises a wire end fixing clamp and a winding mandrel, the ends of the narrow-band flux-cored solder and the narrow-band material are respectively bent, the ends of the narrow-band flux-cored solder are firstly fixed by the wire end fixing clamp, then the narrow-band material is tightly attached to the narrow-band flux-cored solder, the ends of the narrow-band material are fixed by the wire end fixing clamp, and then the winding mandrel drives the narrow-band flux-cored solder and the narrow-band material to rotate and wind to form a double spiral shape and are mutually clamped into a disc shape.
Furthermore, the cross sections of the narrow-band flux-cored solder and the narrow-band material are trapezoidal, and in the winding process, the side surfaces of the narrow-band flux-cored solder and the narrow-band material are connected, so that the cross section of the spliced body after splicing is parallelogram.
Furthermore, the cross sections of the narrow-band flux-cored solder and one end of the narrow-band material are semicircular grooves, the cross sections of the other end of the narrow-band flux-cored solder are drum-shaped, and in the winding process, one drum-shaped end of the narrow-band material is inserted into one end of the semicircular groove of the narrow-band flux-cored solder and then wound.
The beneficial effects of the invention are as follows:
the invention provides a flux-cored composite solder cake with a spiral skeleton and impact resistance and a preparation method thereof, wherein a narrow-band flux-cored solder and a narrow-band alloy are continuously wound together at intervals and are clamped into a disc shape, so that the solder cake has good rigidity and structural stability, and is convenient to package and transport; the spiral brazing filler metal has the advantages that the production process is simple, the batch production is easy, compared with the traditional sheet brazing filler metal, the specific surface area is increased, and the melting temperature is easier to reach under the same heat input condition; meanwhile, the brazing filler metal is a flux core, and the flux core contains brazing flux, so that the accurate and quantitative addition of the brazing flux can be realized, the brazing flux dosage in the brazing process is reduced, and the pollution to the environment is reduced; when in use, the brazing flux is not needed to be additionally added, and the method has the advantages of high production efficiency, low cost, convenient use and the like;
the flux-cored composite brazing cake with the spiral skeleton and the impact resistance can be used for large-area hard alloy brazing, the AgCuZn brazing filler metal is fused with part of CuNi alloy in the brazing process and is diffused to a base metal, so that in-situ metallurgical reaction is realized to generate the CuNiAgZn alloy, the strength of a brazing seam is improved, unreacted spiral copper-nickel alloy isolation strips are left after the brazing, the stress can be greatly released, the cracking of the hard alloy is prevented under impact load, and the impact resistance of a hard alloy tool is greatly improved.
Drawings
FIG. 1 is a schematic structural diagram of a narrow band flux cored solder;
FIG. 2 is a top view of a narrow band flux cored solder;
FIG. 3 is a schematic diagram of the structure of the flux core composite braze cake of example 1 of the present invention;
FIG. 4 is a cross-sectional view of a flux core composite braze cake of example 1 of the invention;
FIG. 5 is a schematic structural view of a flux core composite braze cake of example 2 of the present invention;
FIG. 6 is a cross-sectional view of a flux core composite braze cake of example 2 of the present invention;
FIG. 7 is a schematic view of a winding apparatus used in the present invention;
reference numerals: 1. the brazing filler metal outer layer, 2, the brazing flux core, 3, the spiral lap joint, 4, the narrow-band flux core brazing filler metal, 5, the narrow-band material, 6, the brazing filler metal cake, 7, the winding device, 8, the wire end fixing clamp, 9 and the winding mandrel.
Detailed Description
The invention is further illustrated below in conjunction with specific examples.
The specific embodiment is as follows:
the utility model provides a take flux core composite brazing filler metal cake of spiral skeleton shock resistance, brazing filler metal cake 6 twine by narrow-band flux core brazing filler metal 4 and narrow-band material 5 interval and form the plane double helix shape, the clearance between narrow-band flux core brazing filler metal 4 and the narrow-band material 5 is less than or equal to 0.1 mm; as shown in fig. 1 and 2, the narrow-band flux-cored solder 4 comprises a solder outer layer 1 and a flux core 2 filled in the solder outer layer 1, wherein the solder outer layer 1 comprises 44-46 parts of Ag, 24-26 parts of Zn and 28-30 parts of Cu by weight, the ribbon-shaped solder prepared from the Ag, the Cu and the Zn in the proportion is rotationally rolled into a tubular structure with a spiral lap joint 3, the flux core 2 comprises a silver flux core, and the narrow-band material 5 is copper-nickel alloy.
Further, when the brazing filler metal outer layer 1 is rolled, 0.01-0.025 parts of rare earth is added into the Ag, cu and Zn strip brazing filler metal according to parts by weight.
Further, the cross sections of the narrow-band flux-cored solder 4 and the narrow-band material 5 are trapezoidal.
Furthermore, the cross sections of the narrow-band flux-cored solder 4 and one end of the narrow-band material 5 are semicircular grooves, and the cross sections of the other end of the narrow-band flux-cored solder are drum-shaped.
Further, the thickness of the brazing cake is 0.1-3 mm.
Further, the preparation method of the drug core composite brazing cake with the spiral framework and impact resistance comprises the following steps:
(1) Weighing 44-46 parts of Ag, 24-26 parts of Zn and 28-30 parts of Cu according to parts by weight, casting into a brazing filler metal cast ingot, cutting off a riser and turning the cast ingot to remove oxide skin for later use;
(2) Placing the solder cast ingot in the step (1) in a muffle furnace at 460-480 ℃ for preheating, and placing the preheated solder cast ingot into extrusion equipment for extrusion to form strip solder;
(3) Rotating and rolling the strip-shaped brazing filler metal in the step (2) into a tubular structure with a spiral lap seam 3;
(4) Putting the silver soldering flux core into the tubular structure prepared in the step (3), and pressing into a narrow band to form a narrow band flux core solder 4 for standby;
(5) Taking copper-nickel alloy ingots, cutting off a riser, turning the ingot to remove oxide skin, placing the ingot in a muffle furnace at 460-480 ℃ for preheating, and placing the ingot into extrusion equipment for extrusion into a narrow-band material 5 for standby;
(6) And (3) winding the narrow-band flux-cored brazing filler metal 4 prepared in the step (4) and the narrow-band material 5 prepared in the step (5) at intervals to form double spirals and mutually clamping the double spirals to form a disc shape, and cutting off the disc shape after winding is finished, so that the flux-cored composite brazing filler metal cake with the spiral skeleton and the impact resistance can be prepared.
Further, in the step (6), a winding device 7 is used in the winding process, the winding device 7 comprises a wire end fixing clamp 8 and a winding mandrel 9, the ends of the narrow-band flux-cored solder 4 and the narrow-band material 5 are respectively bent, the ends of the narrow-band flux-cored solder 4 are firstly fixed by the wire end fixing clamp 8, then the narrow-band material 5 is tightly attached to the narrow-band flux-cored solder 4, the ends of the narrow-band material 5 are fixed by the wire end fixing clamp 8, and then the winding mandrel 9 drives the narrow-band flux-cored solder and the narrow-band material 5 to rotate and wind to form a double spiral shape and be clamped into a disc shape.
Further, the cross sections of the narrow-band flux-cored solder 4 and the narrow-band material 5 are trapezoidal, and in the winding process, the side surfaces of the narrow-band flux-cored solder 4 and the narrow-band material 5 are connected, so that the cross section of the spliced body after splicing is parallelogram.
Further, the cross sections of the narrow-band flux-cored solder 4 and one end of the narrow-band material 5 are semicircular grooves, and the cross sections of the other end of the narrow-band flux-cored solder are drum-shaped, and in the winding process, one drum-shaped end of the narrow-band material 5 is inserted into one end of the semicircular groove of the narrow-band flux-cored solder 4 and then wound.
Example 1
The thickness of the brazing filler metal cake 6 is 0.1 mm, the brazing filler metal cake 6 is formed by winding narrow-band brazing filler metal 4 and narrow-band materials 5 at intervals to form a plane double helix, and the gap between the narrow-band brazing filler metal 4 and the narrow-band materials 5 is less than or equal to 0.1 mm; the narrow-band flux-cored brazing filler metal 4 comprises a brazing filler metal outer layer 1 and a flux core 2 filled in the brazing filler metal outer layer 1, wherein the brazing filler metal outer layer 1 comprises, by weight, 44 parts of Ag,24 parts of Zn and 28 parts of Cu, and a strip-shaped brazing filler metal prepared from Ag, cu, zn and rare earth in the proportion is rotationally rolled into a tubular structure with a spiral lap joint 3, as shown in fig. 4, the cross sections of the narrow-band flux-cored brazing filler metal 4 and the narrow-band material 5 are both trapezoidal, the flux core 2 comprises a silver flux core, and the narrow-band material 5 is copper-nickel alloy.
Further, the preparation method of the drug core composite brazing cake with the spiral framework and impact resistance comprises the following steps:
(1) Weighing 44 parts of Ag,24 parts of Zn and 28 parts of Cu according to parts by weight, casting into a cuboid brazing filler metal cast ingot of 50 multiplied by 100 mm, cutting off a riser and turning the cast ingot to remove oxide skin for later use;
(2) Heating the solder extrusion equipment to 480 ℃, preheating the solder cast ingot in the step (1) in a muffle furnace at 460 ℃, putting the preheated solder cast ingot into the extrusion equipment to extrude into 8X 100 mm solder sheets, rolling the solder sheets to 2X 100 mm, and cutting the rolled solder sheets into 1.5X 2 mm band-shaped solder with a trapezoid cross section area;
(3) Rotating and rolling the trapezoid ribbon-shaped brazing filler metal in the step (2) into a tubular structure with a spiral lap seam 3;
(4) Putting the silver soldering flux core into the tubular structure prepared in the step (3), pressing into a narrow band to form a narrow band flux core solder 4, and cleaning and passivating for later use;
(5) Taking copper-nickel alloy cast ingot, cutting off a riser, turning the cast ingot to remove oxide skin, placing the cast ingot in a muffle furnace at 460 ℃ for preheating, placing the preheated cast ingot into extrusion equipment at 480 ℃ for extrusion into an alloy narrow band of 8 multiplied by 100 mm, rolling the alloy narrow band to 2 multiplied by 100 mm, cutting the rolled alloy narrow band into a narrow band material 5 with the cross section area of 1.5 multiplied by 2 mm and the trapezoid, and cleaning and passivating the narrow band material for standby;
(6) As shown in fig. 3, the narrow-band flux-cored solder 4 prepared in the step (4) and the narrow-band material 5 prepared in the step (5) are wound at intervals to form a double helix and are clamped with each other to form a disc shape: the winding process uses a winding device 7, as shown in fig. 7, the winding device 7 comprises a wire end fixing clamp 8 and a winding mandrel 9, the ends of the narrow-band flux-cored solder 4 and the narrow-band material 5 are respectively bent, and the ends of the narrow-band flux-cored solder 4 are firstly fixed by the wire end fixing clamp 8; then, the narrow-band material 5 is closely attached to the narrow-band flux-cored solder 4, and the end of the narrow-band material 5 is fixed by using a wire end fixing clamp 8, and as the cross sections of the narrow-band flux-cored solder 4 and the narrow-band material 5 are trapezoidal, the side surfaces of the narrow-band flux-cored solder 4 and the narrow-band material 5 are connected, so that the cross section of a spliced body after splicing is in a parallelogram; then the winding mandrel 9 drives the narrow-band flux-cored solder and the narrow-band material 5 to rotate and wind to form double spirals which are clamped into a disc shape; cutting off after winding is completed, and obtaining the flux-cored composite brazing cake with the spiral framework and impact resistance.
Example 2
The thickness of the brazing filler metal cake 6 is 2 mm, the brazing filler metal cake 6 is formed by winding narrow-band brazing filler metal 4 and narrow-band materials 5 at intervals to form a planar double helix, and the gap between the narrow-band brazing filler metal 4 and the narrow-band materials 5 is less than or equal to 0.1 mm; the narrow-band flux-cored brazing filler metal 4 comprises a brazing filler metal outer layer 1 and a flux core 2 filled in the brazing filler metal outer layer 1, wherein the brazing filler metal outer layer 1 comprises, by weight, 45 parts of Ag,25 parts of Zn, 29 parts of Cu and 0.02 part of rare earth, a strip-shaped brazing filler metal prepared from the Ag, the Cu, the Zn and the rare earth which are prepared according to the proportion is rotationally rolled into a tubular structure with a spiral lap joint 3, as shown in fig. 6, the cross sections of the narrow-band flux-cored brazing filler metal 4 and one end of the narrow-band material 5 are semicircular grooves, the cross section of the other end of the narrow-band flux-cored brazing filler metal is drum-shaped, the flux core 2 comprises a silver flux core, and the narrow-band material 5 is copper-nickel alloy.
Further, the preparation method of the drug core composite brazing cake with the spiral framework and impact resistance comprises the following steps:
(1) Weighing 45 parts of Ag,25 parts of Zn, 29 parts of Cu and 0.02 part of rare earth according to parts by weight, casting into a cuboid brazing filler metal cast ingot of 50 multiplied by 100 mm, cutting off a riser and turning the cast ingot to remove oxide skin for later use;
(2) Heating the solder extrusion equipment to 480 ℃, preheating the solder cast ingot in the step (1) in a muffle furnace at 470 ℃, putting the preheated solder cast ingot into the extrusion equipment to extrude into 8X 100 mm solder sheets, rolling the solder sheets to 2X 100 mm, cutting the rolled solder sheets into 1.5X 2 mm strip-shaped solders, wherein the cross section of one end of each strip-shaped solders is a semicircular groove, and the cross section of the other end of each strip-shaped solders is drum-shaped;
(3) Rotating and rolling the trapezoid ribbon-shaped brazing filler metal in the step (2) into a tubular structure with a spiral lap seam 3;
(4) Putting the silver soldering flux core into the tubular structure prepared in the step (3), pressing into a narrow band to form a narrow band flux core solder 4, and cleaning and passivating for later use;
(5) Taking copper-nickel alloy cast ingots, cutting off risers, turning the cast ingots to remove oxide scales, placing the cast ingots in a muffle furnace at 470 ℃ for preheating, placing the preheated alloy narrow strips into extrusion equipment at 480 ℃ for extrusion into alloy narrow strips of 8 multiplied by 100 mm, rolling the alloy narrow strips to 2 multiplied by 100 mm, cutting the rolled alloy narrow strips into narrow strip materials 5 of 1.5 multiplied by 2 mm, wherein the cross section of one end of each narrow strip material 5 is a semicircular groove, the cross section of the other end is drum-shaped, and cleaning and passivating the narrow strip materials for later use;
(6) As shown in fig. 5, the narrow-band flux-cored solder 4 prepared in the step (4) and the narrow-band material 5 prepared in the step (5) are wound at intervals to form a double helix and are clamped with each other to form a disc shape: the winding process uses a winding device 7, as shown in fig. 7, the winding device 7 comprises a wire end fixing clamp 8 and a winding mandrel 9, the ends of the narrow-band flux-cored solder 4 and the narrow-band material 5 are respectively bent, and the ends of the narrow-band flux-cored solder 4 are firstly fixed by the wire end fixing clamp 8; then the narrow-band material 5 is closely attached to the narrow-band flux-cored solder 4, the end of the narrow-band material 5 is fixed by a wire end fixing clamp 8, the cross sections of the narrow-band flux-cored solder 4 and one end of the narrow-band material 5 are semicircular grooves, the cross sections of the other end of the narrow-band flux-cored solder are drum-shaped, and in the winding process, one drum-shaped end of the narrow-band material 5 can be inserted into one end of the semicircular groove of the narrow-band flux-cored solder 4 to fix the narrow-band flux-cored solder 4 and the narrow-band flux-cored solder; then the winding mandrel 9 drives the narrow-band flux-cored solder and the narrow-band material 5 to rotate and wind to form double spirals which are clamped into a disc shape; cutting off after winding is completed, and obtaining the flux-cored composite brazing cake with the spiral framework and impact resistance.
Example 3
The thickness of the brazing filler metal cake 6 is 3mm, the brazing filler metal cake 6 is formed by winding narrow-band brazing filler metal 4 and narrow-band materials 5 at intervals to form a planar double helix, and the gap between the narrow-band brazing filler metal 4 and the narrow-band materials 5 is less than or equal to 0.1 mm; the narrow-band flux-cored brazing filler metal 4 comprises a brazing filler metal outer layer 1 and a flux-cored flux 2 filled in the brazing filler metal outer layer 1, wherein the brazing filler metal outer layer 1 comprises 46 parts of Ag,26 parts of Zn, 30 parts of Cu and 0.025 part of rare earth by weight, a strip-shaped brazing filler metal prepared from the Ag, the Cu, the Zn and the rare earth which are prepared according to the proportion is rotationally rolled into a tubular structure with a spiral lap joint 3, the cross sections of the narrow-band flux-cored brazing filler metal 4 and one end of the narrow-band material 5 are semicircular grooves, the cross section of the other end of the narrow-band flux-cored flux 4 and the other end of the narrow-band material 5 are drum-shaped, the flux-cored flux 2 comprises a silver flux core, and the narrow-band material 5 is copper-nickel alloy.
Further, the preparation method of the drug core composite brazing cake with the spiral framework and impact resistance comprises the following steps:
(1) Weighing 46 parts of Ag,26 parts of Zn, 30 parts of Cu and 0.025 part of rare earth according to parts by weight, casting into a cuboid brazing filler metal cast ingot of 50 multiplied by 100 mm, cutting off a riser and turning the cast ingot to remove oxide skin for later use;
(2) Heating the solder extrusion equipment to 480 ℃, preheating the solder cast ingot in the step (1) in a muffle furnace at 480 ℃, putting the preheated solder cast ingot into the extrusion equipment to extrude into 8X 100 mm solder sheets, rolling the solder sheets to 2X 100 mm, cutting the rolled solder sheets into 1.5X 2 mm strip-shaped solders, wherein the cross section of one end of each strip-shaped solders is a semicircular groove, and the cross section of the other end of each strip-shaped solders is drum-shaped;
(3) Rotating and rolling the trapezoid ribbon-shaped brazing filler metal in the step (2) into a tubular structure with a spiral lap seam 3;
(4) Putting the silver soldering flux core into the tubular structure prepared in the step (3), pressing into a narrow band to form a narrow band flux core solder 4, and cleaning and passivating for later use;
(5) Taking copper-nickel alloy cast ingots, cutting off risers, turning off the cast ingots to remove oxide scales, placing the cast ingots in a 480 ℃ muffle furnace for preheating, placing the preheated alloy narrow strips into extrusion equipment with the temperature of 480 ℃ for extrusion into alloy narrow strips of 8 multiplied by 100 mm, rolling the alloy narrow strips to 2 multiplied by 100 mm, cutting the rolled alloy narrow strips into narrow strip materials 5 with the thickness of 1.5 multiplied by 2 mm, wherein the cross section of one end of each narrow strip material 5 is a semicircular groove, the cross section of the other end is drum-shaped, and cleaning and passivating the narrow strip materials for later use;
(6) Winding the narrow-band flux-cored solder 4 prepared in the step (4) and the narrow-band material 5 prepared in the step (5) at intervals to form a double helix and mutually clamping the double helix into a disc shape: the winding process uses a winding device 7, wherein the winding device 7 comprises a wire end fixing clamp 8 and a winding mandrel 9, the ends of the narrow-band flux-cored solder 4 and the narrow-band material 5 are respectively bent, and the ends of the narrow-band flux-cored solder 4 are firstly fixed by the wire end fixing clamp 8; then the narrow-band material 5 is closely attached to the narrow-band flux-cored solder 4, the end of the narrow-band material 5 is fixed by a wire end fixing clamp 8, the cross sections of the narrow-band flux-cored solder 4 and one end of the narrow-band material 5 are semicircular grooves, the cross sections of the other end of the narrow-band flux-cored solder are drum-shaped, and in the winding process, one drum-shaped end of the narrow-band material 5 can be inserted into one end of the semicircular groove of the narrow-band flux-cored solder 4 to fix the narrow-band flux-cored solder 4 and the narrow-band flux-cored solder; then the winding mandrel 9 drives the narrow-band flux-cored solder and the narrow-band material 5 to rotate and wind to form double spirals which are clamped into a disc shape; cutting off after winding is completed, and obtaining the flux-cored composite brazing cake with the spiral framework and impact resistance.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The utility model provides a take flux core composite solder cake of spiral skeleton shock resistance which characterized in that, the solder cake is twined by narrowband flux core solder and narrowband material interval and is constituteed plane double helix shape, the thickness of solder cake is 0.1 ~ 3mm, clearance between narrowband flux core solder and the narrowband material is less than or equal to 0.1 mm; the narrow-band flux-cored brazing filler metal comprises a brazing filler metal outer layer and a flux core filled in the brazing filler metal outer layer, wherein the brazing filler metal outer layer comprises, by weight, 44-46 parts of Ag, 24-26 parts of Zn and 28-30 parts of Cu, a tubular structure with spiral lap joints is formed by rotationally rolling strip-shaped brazing filler metal prepared from the Ag, the Cu and the Zn which are prepared according to the proportion, the flux core comprises a silver flux core, and the narrow-band material is copper-nickel alloy.
2. The composite brazing filler metal cake with the spiral skeleton and impact resistance as claimed in claim 1, wherein 0.01-0.025 parts of rare earth is added into the Ag, cu and Zn band-shaped brazing filler metal according to parts by weight when the brazing filler metal outer layer is rolled.
3. The impact resistant cored composite braze cake with spiral framework of claim 1, wherein the cross sections of the narrow band cored braze and the narrow band material are trapezoidal.
4. The impact resistant cored composite brazing filler metal with the spiral framework as in claim 1, wherein the cross sections of the narrow-band cored brazing filler metal and one end of the narrow-band material are semicircular grooves, and the cross sections of the other end of the narrow-band cored brazing filler metal and the narrow-band material are drum-shaped.
5. The method for preparing the flux-cored composite brazing cake with the spiral framework and impact resistance as claimed in claim 1, comprising the following steps:
(1) Weighing 44-46 parts of Ag, 24-26 parts of Zn and 28-30 parts of Cu according to parts by weight, casting into a brazing filler metal cast ingot, cutting off a riser and turning the cast ingot to remove oxide skin for later use;
(2) Placing the solder cast ingot in the step (1) in a muffle furnace at 460-480 ℃ for preheating, and placing the preheated solder cast ingot into extrusion equipment for extrusion to form strip solder;
(3) Rotating and rolling the strip-shaped brazing filler metal in the step (2) into a tubular structure with spiral lap joints;
(4) Putting the silver soldering flux core into the tubular structure prepared in the step (3), and pressing into a narrow band to form a narrow band flux core solder for standby;
(5) Taking copper-nickel alloy ingots, cutting off a riser, turning the ingot to remove oxide skin, placing the ingot in a muffle furnace at 460-480 ℃ for preheating, and placing the ingot in extrusion equipment for extrusion into a narrow-band material for standby;
(6) And (3) winding the narrow-band flux-cored solder prepared in the step (4) and the narrow-band material prepared in the step (5) at intervals to form double spirals, mutually clamping the double spirals into a disc shape, and cutting off the double spirals after winding is finished to obtain the flux-cored composite flux-cored cake with the spiral skeleton and impact resistance.
6. The method for preparing the impact-resistant flux-cored composite brazing cake with the spiral framework, as claimed in claim 5, is characterized in that in the step (6), a winding device is used in the winding process, the winding device comprises a wire end fixing clamp and a winding mandrel, the ends of the narrow-band flux-cored brazing filler metal and the narrow-band material are respectively bent, the ends of the narrow-band flux-cored brazing filler metal are firstly fixed by the wire end fixing clamp, then the narrow-band material is tightly attached to the narrow-band flux-cored brazing filler metal, the ends of the narrow-band material are fixed by the wire end fixing clamp, and then the winding mandrel drives the narrow-band flux-cored brazing filler metal and the narrow-band material to rotate and wind, so that double spirals are formed and clamped into discs.
7. The method for preparing an impact-resistant composite brazing filler metal with a spiral skeleton according to claim 6, wherein the cross sections of the narrow-band brazing filler metal with the narrow-band material are trapezoidal, and in the winding process, the side surfaces of the narrow-band brazing filler metal with the narrow-band material are connected, and the cross section of the spliced body is in a parallelogram.
8. The method for preparing an impact-resistant composite brazing filler metal with a spiral skeleton according to claim 6, wherein the cross sections of the narrow-band brazing filler metal and one end of the narrow-band material are semicircular grooves, the cross sections of the other end of the narrow-band brazing filler metal are drum-shaped, and in the winding process, one drum-shaped end of the narrow-band material is inserted into one end of the semicircular groove of the narrow-band brazing filler metal and then wound.
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| CN111979444B (en) * | 2020-08-26 | 2021-09-28 | 郑州机械研究所有限公司 | Silver solder and preparation method and application thereof |
| CN113909734A (en) * | 2021-11-11 | 2022-01-11 | 烟台精创力合科技有限公司 | High-conductivity flux-cored soldering sheet |
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| CN101842186A (en) * | 2007-09-25 | 2010-09-22 | 北野正一 | Flux-including solder wire |
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