Anti-impact flux-cored composite solder cake with spiral framework and preparation method thereof

detailed description:

[0032] An impact-resistant powder-cored composite solder cake with a spiral skeleton. The solder cake 6 is formed by winding a narrow-band solder-core solder 4 and a narrow-band material 5 at intervals to form a flat double helix. The narrow-band solder-core solder 4 and the narrow-band The gap between material 5 is ≤0.1 mm; such as figure 1 with figure 2 As shown, the narrow-band flux-cored solder 4 includes a solder outer layer 1 and a flux core 2 filled in the solder outer layer 1. The solder outer layer 1 includes 44 parts by weight. ~46 parts of Ag, 24~26 parts of Zn and 28-30 parts of Cu, and a ribbon-shaped solder roll made of Ag, Cu, Zn prepared according to the above ratio, is made into a spiral lap joint 3 In the tubular structure, the flux core 2 includes a silver flux core, and the narrow band material 5 is a copper-nickel alloy.

[0033] Further, when the outer layer 1 of the solder is rolled, 0.01 to 0.025 parts of rare earth is added to the Ag, Cu, and Zn ribbon solder according to parts by weight.

[0034] Further, the cross-sections of the narrow-band flux-cored solder 4 and the narrow-band material 5 are both trapezoidal.

[0035] Further, the cross-sections of one end of the narrow-band flux cored solder 4 and the narrow-band material 5 are both semicircular grooves, and the cross-sections of the other end are both drum-shaped.

[0036] Further, the thickness of the solder cake is 0.1-3 mm.

[0037] Further, a method for preparing an impact-resistant cored composite solder cake with a spiral skeleton includes the following steps:

[0038] (1) According to parts by weight, weigh 44-46 parts Ag, 24-26 parts Zn and 28-30 parts Cu, and cast them into a solder ingot, cut off the riser and turn the ingot to remove the oxide scale spare;

[0039] (2) Place the solder ingot in step (1) in a muffle furnace at 460~480℃ for preheating, and put it into the extrusion equipment after preheating to be extruded into ribbon solder;

[0040] (3) Rotate and roll the ribbon-shaped brazing filler metal in step (2) into a tubular structure with spiral lap joint 3;

[0041] (4) Take the silver flux core and put it into the tubular structure prepared in step (3), and press it into a narrow band to form the narrow band flux core brazing filler metal 4 for use;

[0042] (5) Take the copper-nickel alloy ingot, cut off the riser and turn the ingot to remove the oxide scale, and place it in a muffle furnace at 460~480℃ for preheating. After the preheating is completed, put it into the extrusion equipment and extrude into a narrow strip Material 5, spare;

[0043] (6) The narrow-band flux core solder 4 prepared in step (4) and the narrow-band material 5 prepared in step (5) are wound at intervals to form a double helix and are clamped to each other into a disc shape, and cut after winding to obtain A cored composite solder cake with a spiral skeleton for impact resistance.

[0044] Further, in step (6), the winding process uses a winding device 7 which includes a wire end fixing jig 8 and a winding mandrel 9 to fold the ends of the narrow band flux cored solder 4 and the narrow band material 5 respectively Bend, and fix the end of the narrow-band flux-cored solder 4 with the wire end fixing jig 8, and then set the narrow-band material 5 close to the narrow-band flux-cored solder 4, and use the wire end fixing jig 8 to fix the end of the narrow band material 5 It is fixed, and then the mandrel 9 is wound to drive the narrow-band-shaped flux-cored solder and the narrow-band material 5 to rotate to form a double helix and be clamped into a disc shape.

[0045] Further, the cross-sections of the narrow-band flux-cored solder 4 and the narrow-band material 5 are both trapezoidal. During the winding process, the side surface of the narrow-band flux-cored solder 4 and the side surface of the narrow-band material 5 meet, And the cross section of the spliced ​​body is parallelogram.

[0046] Further, the cross section of one end of the narrow band flux cored solder 4 and the narrow band material 5 are both semicircular grooves, and the cross section of the other end is both drum-shaped. During the winding process, the narrow band material 5 One end of the drum shape is inserted into one end of the semicircular groove of the narrow-band flux-cored solder 4 and then wound.

[0047] Example 1

[0048] An impact-resistant flux cored composite solder cake with a spiral skeleton. The thickness of the solder cake 6 is 0.1 mm. The solder cake 6 is composed of a narrow band flux core solder 4 and a narrow band material 5 wound at intervals to form a plane double spiral The gap between the narrow-band flux-cored solder 4 and the narrowband material 5 is ≤0.1 mm; the narrow-band flux-cored solder 4 includes an outer layer of solder 1 and a solder filled in the outer layer 1 of solder Reagent core 2, the outer layer 1 of the solder includes 44 parts by weight of Ag, 24 parts of Zn, 28 parts of Cu, and is made of Ag, Cu, Zn, and rare earths prepared in the above proportions The ribbon-shaped solder is rolled into a tubular structure with spiral lap joint 3, such as Figure 4 As shown, the cross-sections of the narrow-band flux cored solder 4 and the narrowband material 5 are both trapezoidal, the flux core 2 includes a silver flux core, and the narrowband material 5 is a copper-nickel alloy.

[0049] Further, a method for preparing an impact-resistant cored composite solder cake with a spiral skeleton includes the following steps:

[0050] (1) According to parts by weight, weigh 44 parts of Ag, 24 parts of Zn and 28 parts of Cu, and cast them into a 50×100 mm rectangular solder ingot, cut off the riser and turn the ingot to remove the oxide scale spare;

[0051] (2) Raise the temperature of the solder extrusion equipment to 480℃, put the solder ingot in step (1) in a 460℃ muffle furnace for preheating, and put it into the extrusion equipment after preheating. Become an 8×100 mm solder sheet and roll it to 2×100 mm, and cut the rolled solder sheet into 1.5×2 mm strip-shaped solder with a trapezoidal cross-sectional area;

[0052] (3) Rotate the trapezoidal ribbon-shaped solder in step (2) into a tubular structure with spiral lap joint 3;

[0053] (4) Take the silver flux core and put it into the tubular structure prepared in step (3), and press it into a narrow band to form the narrow band flux core brazing filler metal 4, which is cleaned and passivated for use;

[0054] (5) Take the copper-nickel alloy ingot, cut off the riser and turn the ingot to remove the oxide scale, and place it in a muffle furnace at 460℃ for preheating. After preheating, put it into the extrusion equipment at a temperature of 480℃. Extruded into 8×100 mm alloy narrow strip, and rolled to 2×100mm, cut the rolled alloy narrow strip into 1.5×2 mm narrow strip material with a trapezoidal cross-sectional area 5, clean and passivate for use;

[0055] (6) Such as image 3 As shown, the narrow-band flux-cored brazing filler metal 4 prepared in step (4) and the narrow-band material 5 prepared in step (5) are wound at intervals to form a double helix and are clamped into a disc shape: the winding process uses a winding device 7, such as Figure 7 As shown, the winding device 7 includes a wire end fixing jig 8 and a winding mandrel 9. The ends of the narrow band flux core solder 4 and the narrow band material 5 are respectively bent, and the wire end fixing jig 8 is used to first fix the narrow band flux core The end of the brazing material 4 is fixed; then the narrowband material 5 is placed close to the narrowband flux-cored brazing material 4, and the end of the narrowband material 5 is fixed with the wire end fixing clamp 8. The cross-section of the narrow-band material 5 is trapezoidal, and the side surface of the narrow-band flux-cored solder 4 and the side surface of the narrow-band material 5 are connected to make the cross-section of the spliced ​​body formed into a parallelogram; then the mandrel is wound 9 drives the narrow-band shaped flux core solder and the narrow band material 5 to rotate and wind to form a double spiral shape and clamp each other into a disc shape; after winding, it is cut to obtain an impact-resistant flux core composite solder cake with a spiral skeleton.

[0056] Example 2

[0057] An impact-resistant flux cored composite solder cake with a spiral skeleton. The thickness of the solder cake 6 is 2 mm. The solder cake 6 is composed of a narrow band flux core solder 4 and a narrow band material 5 wound at intervals to form a plane double spiral The gap between the narrow-band flux-cored solder 4 and the narrowband material 5 is ≤0.1 mm; the narrow-band flux-cored solder 4 includes an outer layer of solder 1 and a solder filled in the outer layer 1 of solder The core 2 of the solder, the outer layer 1 of the solder, in parts by weight, includes 45 parts of Ag, 25 parts of Zn, 29 parts of Cu and 0.02 parts of rare earth, and is made of Ag, Cu, The ribbon-shaped solder made of Zn and rare earth is rolled into a tubular structure with spiral lap joint 3, such as Image 6 As shown, the cross section of one end of the narrow band flux cored solder 4 and the narrow band material 5 are both semicircular grooves, and the cross section of the other end is both drum-shaped, and the flux core 2 includes silver brazing The drug core, the narrow band material 5 is a copper-nickel alloy.

[0058] Further, a method for preparing an impact-resistant cored composite solder cake with a spiral skeleton includes the following steps:

[0059] (1) According to parts by weight, weigh out 45 parts of Ag, 25 parts of Zn, 29 parts of Cu and 0.02 parts of rare earth, and cast them into a 50×100 mm rectangular solder ingot, and cut off the riser. And turn the ingot to remove the oxide scale for use;

[0060] (2) Raise the temperature of the solder extrusion equipment to 480℃, put the solder ingot in step (1) in a 470℃ muffle furnace for preheating, and put it into the extrusion equipment after preheating. Into 8×100 mm solder sheet, and rolled to 2×100 mm, cut the rolled solder sheet into 1.5×2 mm strip solder, the cross section of one end of the strip solder It is a semicircular groove, and the cross section at the other end is drum-shaped;

[0061] (3) Rotate the trapezoidal ribbon-shaped solder in step (2) into a tubular structure with spiral lap joint 3;

[0062] (4) Take the silver flux core and put it into the tubular structure prepared in step (3), and press it into a narrow band to form the narrow band flux core brazing filler metal 4, which is cleaned and passivated for use;

[0063] (5) Take the copper-nickel alloy ingot, cut off the riser and turn the ingot to remove the oxide scale, and place it in a muffle furnace at 470℃ for preheating. After preheating, put it into the extrusion equipment at a temperature of 480℃. Extruded into 8×100 mm alloy narrow strip and rolled to 2×100 mm, cut the rolled alloy narrow strip into 1.5×2 mm narrow strip material 5, the cross section of one end of the narrow strip material 5 is semicircular -Shaped groove, the other end of the cross-section is drum-shaped, cleaning passivation treatment for use;

[0064] (6) Such as Figure 5 As shown, the narrow-band flux-cored brazing filler metal 4 prepared in step (4) and the narrow-band material 5 prepared in step (5) are wound at intervals to form a double helix and are clamped into a disc shape: the winding process uses a winding device 7, such as Figure 7 As shown, the winding device 7 includes a wire end fixing jig 8 and a winding mandrel 9. The ends of the narrow band flux core solder 4 and the narrow band material 5 are respectively bent, and the wire end fixing jig 8 is used to first fix the narrow band flux core The end of the brazing material 4 is fixed; then the narrowband material 5 is placed close to the narrowband flux-cored brazing material 4, and the end of the narrowband material 5 is fixed with a wire end fixing clamp 8. The narrowband flux-cored brazing material 4 is connected to the The cross section of one end of the narrow band material 5 is a semicircular groove, and the cross section of the other end is a drum shape. During the winding process, one end of the drum shape of the narrow band material 5 can be inserted into the narrow band flux core solder. 4 One end of the semi-circular groove fixes the two; then winding the mandrel 9 to drive the narrow band-shaped flux core solder and the narrow band material 5 to rotate and wind to form a double spiral shape and mutually clamp into a disc shape; cut off after winding , Can be prepared with a spiral skeleton anti-impact core composite solder cake.