CN113416866A - Lead-free solder oxidation resistant alloy and production and preparation process thereof - Google Patents
Lead-free solder oxidation resistant alloy and production and preparation process thereof Download PDFInfo
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- CN113416866A CN113416866A CN202110733210.1A CN202110733210A CN113416866A CN 113416866 A CN113416866 A CN 113416866A CN 202110733210 A CN202110733210 A CN 202110733210A CN 113416866 A CN113416866 A CN 113416866A
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- 229910000679 solder Inorganic materials 0.000 title claims abstract description 107
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 21
- 239000000956 alloy Substances 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 230000003647 oxidation Effects 0.000 title claims abstract description 13
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 49
- 230000007246 mechanism Effects 0.000 claims abstract description 39
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910052779 Neodymium Inorganic materials 0.000 claims abstract description 19
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052797 bismuth Inorganic materials 0.000 claims abstract description 19
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims abstract description 19
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 19
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 19
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 19
- 229910052709 silver Inorganic materials 0.000 claims abstract description 19
- 239000004332 silver Substances 0.000 claims abstract description 19
- 229910052718 tin Inorganic materials 0.000 claims abstract description 19
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000011135 tin Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 238000003466 welding Methods 0.000 claims description 47
- 239000002994 raw material Substances 0.000 claims description 29
- 238000004804 winding Methods 0.000 claims description 27
- 238000007599 discharging Methods 0.000 claims description 19
- 230000005540 biological transmission Effects 0.000 claims description 17
- 239000002893 slag Substances 0.000 claims description 13
- 238000003723 Smelting Methods 0.000 claims description 12
- 238000005728 strengthening Methods 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 6
- 238000009740 moulding (composite fabrication) Methods 0.000 claims description 6
- 239000003963 antioxidant agent Substances 0.000 claims 7
- 230000003078 antioxidant effect Effects 0.000 claims 7
- 238000009434 installation Methods 0.000 claims 1
- 238000010408 sweeping Methods 0.000 abstract description 18
- 238000005096 rolling process Methods 0.000 description 10
- 239000013049 sediment Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 229910018471 Cu6Sn5 Inorganic materials 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000007790 scraping Methods 0.000 description 4
- 229910017692 Ag3Sn Inorganic materials 0.000 description 2
- 229910020816 Sn Pb Inorganic materials 0.000 description 2
- 229910020922 Sn-Pb Inorganic materials 0.000 description 2
- 229910008783 Sn—Pb Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000005496 eutectics Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229910006640 β-Sn Inorganic materials 0.000 description 2
- 229910006632 β—Sn Inorganic materials 0.000 description 2
- 229910020994 Sn-Zn Inorganic materials 0.000 description 1
- 229910009069 Sn—Zn Inorganic materials 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C13/00—Alloys based on tin
- C22C13/02—Alloys based on tin with antimony or bismuth as the next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
- B22D43/005—Removing slag from a molten metal surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/26—Selection of soldering or welding materials proper with the principal constituent melting at less than 400 degrees C
- B23K35/262—Sn as the principal constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/02—Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action including acoustic waves
- C22B9/023—By filtering
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D27/00—Stirring devices for molten material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a production and preparation process of a lead-free solder oxidation resistant alloy, which comprises the following steps: s1, firstly putting tin, silver, nickel and bismuth into a furnace body through a feeding mechanism, mixing, then adding rare earth neodymium and a grain refiner, arranging a heater at the bottom of the furnace body, arranging a control box at one side of the furnace body, controlling the heater to heat, and S2, arranging a stirring mechanism in the middle of the furnace body for stirring, normally stirring, and then sweeping dross through a dross sweeping mechanism.
Description
Technical Field
The invention relates to the technical field of solder preparation, in particular to a lead-free solder oxidation resistant alloy and a production preparation process thereof.
Background
With the further development of the development trend of high density and high power of the new generation of integrated circuits, particularly the development of the integrated technology of a multilayer circuit board, Sn-Pb alloy solder is commonly used, because Pb element has great harm to human bodies and the environment, the lead-free solder is produced and gradually popularized in various countries, among various lead-free solders, the Sn-Zn solder has low melting point, is closest to the Sn-Pb solder, has excellent mechanical property and low cost, has great development potential, and gets attention of people;
however, when the existing lead-free solder is produced and prepared, due to the fact that the smelting temperature is high, raw materials are not convenient to add in the production process, high-temperature manual feeding is carried out, certain potential safety hazards exist, all raw materials are placed into the lead-free solder, mixing is not uniform, the solder is not uniform, the packaging effect is poor when the lead-free solder is used, and the production efficiency of an integrated circuit is reduced.
Disclosure of Invention
The invention provides a lead-free solder oxidation resistant alloy and a production preparation process thereof, which can effectively solve the problems that the production efficiency of an integrated circuit is reduced because the melting temperature is high, raw materials are inconvenient to add in the production process and high-temperature manual feeding exists certain potential safety hazard, all raw materials are placed to cause uneven mixing and uneven solder, and the packaging effect is poor in use when the lead-free solder is produced and prepared in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a production and preparation process of lead-free solder oxidation resistant alloy comprises the following steps:
s1, firstly, putting tin, silver, nickel and bismuth into a furnace body through a feeding mechanism, mixing, then adding rare earth neodymium and a grain refiner, arranging a heater at the bottom of the furnace body, and arranging a control box at one side of the furnace body, wherein the control box controls the heater to heat;
s2, a stirring mechanism for stirring is arranged in the middle of the furnace body, normal stirring is carried out, and then scum is swept and removed through a scum sweeping mechanism;
s3, discharging, casting and forming through a discharging hole after smelting to finally obtain the required solder;
and S4, performing label detection on the solder, storing the label after the solder is qualified, and putting the label into a database for recording.
Comprises raw material components and strengthening components;
wherein, the raw material components comprise tin, silver, nickel and bismuth with the purity of 99.95 percent;
the ratio of tin in the solder is 82.2-90.2%;
the proportion of silver in the solder is 1.0-2.5%;
the proportion of bismuth in the solder is 7.5-12.5%;
the proportion of nickel in the solder is 0.8-1.8%;
the strengthening component comprises rare earth neodymium and a grain refiner;
the rare earth neodymium accounts for 0.5 to 1.0 percent of the solder;
the grain refiner accounts for 0.1-5.0%.
A feeding mechanism for feeding materials is installed on the outer side of the furnace body, a stirring mechanism for stirring is installed in the middle of the furnace body, a slag sweeping mechanism for sweeping and removing floating slag is installed in the middle of the furnace body, a discharging pipe for discharging melted solder is installed at the bottom of the furnace body, and a discharging hole for connecting the discharging pipe and a furnace chamber is formed in the bottom of the furnace body;
the raw materials are added into the furnace body through the feeding mechanism, stirred and mixed through the stirring mechanism, and finally, the surface scum is swept through the scum sweeping mechanism.
According to the technical scheme, the feeding mechanism comprises a fixed block, a feeding barrel, a connecting shaft, a connecting block, an arc-shaped stop block, a feeding hopper, a limiting block, a filter screen, a limiting groove, a mounting plate, an electric push rod, a connecting short shaft and a rotating seat;
the utility model discloses a furnace body, including furnace body side, front end, fixed block, feed cylinder, stopper, limiting groove, mounting panel, electric putter's promotion end joint has the connection minor axis, the furnace body side all welds with the front end position has the fixed block, the fixed block top is rotated and is installed the feed cylinder, the outside of feed cylinder corresponds fixed block position department and installs the connecting axle, the fixed block outside corresponds connecting axle both ends position and all welds the connecting block, the inboard welding in feed cylinder top has the arc dog, the top of feed cylinder corresponds arc dog position department welding and has the feeder hopper, the inboard bottom welding of feeder hopper has the stopper, the stopper bottom has the filter screen with arc dog top position joint, furnace body fire door position department has seted up the spacing groove, the welding of furnace body bottom has the mounting panel, electric putter is installed on the top of mounting panel, electric putter's promotion end joint has the connection minor axis, the welding of corresponding connection minor axis position department has the rotation seat bottom the feed cylinder.
According to the technical scheme, the middle of the fixing block is provided with the shaft hole, the connecting shaft is rotatably installed inside the shaft hole, and the connecting shaft is welded among the connecting blocks of the chain.
According to the technical scheme, the input end of the electric push rod is electrically connected with the output end of the external power supply, the rotating round hole is formed in the pushing end of the electric push rod, the connecting short shaft is rotatably installed inside the rotating round hole, and the two ends of the connecting short shaft are welded to the middle position of the rotating seat.
According to the technical scheme, the stirring mechanism comprises a support frame, a stirring motor, a transmission box, a rotating shaft, a scraping plate, a stirring rod, a connecting groove and a connecting hole;
the welding of furnace body fire door position department has the support frame, support frame one end bottom is rotated and is installed agitator motor, the top welding of support frame has the transmission box, the bottom of transmission box is rotated and is installed the pivot, the welding of pivot bottom has the scraper blade, the inboard welding of scraper blade has the puddler, a plurality of spread grooves have been seted up to the bottom equidistance of scraper blade, the connecting hole has been seted up to a spread groove position department equidistance in the middle of the bottom correspondence of scraper blade.
According to the technical scheme, the input end of the stirring motor is electrically connected with the output end of an external power supply;
the transmission box is characterized in that rotating wheels are arranged at two ends of the inner side of the transmission box in a grabbing and pulling mode, chains are meshed and connected to the outer portions of the rotating wheels, and an output shaft and a rotating shaft of the stirring motor are fixedly connected with the rotating wheels.
According to the technical scheme, the slag sweeping mechanism comprises a positioning plate, a threaded ring, a threaded rod, a top stop block, a rotating long rod, a clamping rod, a middle stop block, a slag sweeping net, a limiting net, a steel wire rope, a mounting seat, a winding motor and a winding disc;
the welding of terminal surface has the locating plate before the support frame, the top welding of locating plate has the screw thread ring, screw thread ring inside threaded connection has the threaded rod, the welding of locating plate top one end has the top dog, the threaded rod outside is rotated and has been cup jointed and has been rotated the stock, the outside joint that rotates the stock has the joint pole, it has the middle part dog to rotate the corresponding joint pole tip position welding in stock middle part, the welding of joint pole bottom has the sediment net of sweeping away, it has spacing net to sweep away sediment net one end and be close to middle part dog position department welding, it installs wire rope to rotate stock one end embedding, the welding of furnace body bottom has the mount pad, mounting pad one side installs rolling motor, rolling motor's output shaft one end welding has the rolling dish.
According to the technical scheme, a rotary hole is formed in the middle of the rotary long rod, and the threaded rod is rotatably installed in the rotary hole;
the skimming mesh is of an L-shaped structure, and the bottom end of the limiting mesh is welded and fixed with the bottom end of the skimming mesh.
According to the technical scheme, one end of the steel wire rope is wound outside the winding disc, and the input end of the winding motor is electrically connected with the output end of the external power supply.
Compared with the prior art, the invention has the beneficial effects that: the invention has scientific and reasonable structure and safe and convenient use:
1. through setting up the fixed block, add a feed cylinder, the connecting axle, the spacing groove, electric putter, connect the minor axis, electric putter promotes feeding cylinder bottom rebound, it rotates along the fixed block to add a feed cylinder, thereby make the nozzle of a feed cylinder rebound, make add feed cylinder and spacing groove card and, and pour the raw materials of adding feed cylinder inside to the stove, not only can hold the raw materials, and can promote reinforced through electric putter, it is more convenient not to need manual operation to add material, difficult because the high temperature of smelting furnace scorching hot workman, make workman's security improve.
2. Through setting up arc dog, feeder hopper, stopper and filter screen, the filter screen card connects between stopper and arc dog, makes the filter screen fixed, then adds the raw materials from the feeder hopper position, makes the raw materials get into the inside collection of charging barrel after the filter screen filters, then extracts the filter screen from between stopper and the arc dog again, takes off the filter screen and the impurity that filters out, and the raw materials is prepared to accomplish the back.
3. Through setting up the support frame, agitator motor, the transmission box, the apparatus further comprises a rotating shaft, the scraper blade, the puddler, spread groove and connecting hole, switch-on agitator motor's power, agitator motor moves the pivot through the transmission case and rotates, and then drive scraper blade and puddler and rotate, thereby stir the misce bene to the raw materials of furnace body inside, make the effect of smelting better, smelt the completion back, the molten solder can be along puddler downstream to connecting hole position department, and through the spread groove, make the solder circulation of scraper blade both sides, make things convenient for the solder misce bene.
4. Through setting up the locating plate, the screw ring, the threaded rod, the top stop, rotate the stock, the joint bar, the middle part dog, sweep sediment net and spacing net, the sediment net is as for the molten solder surface, drive the rotatory stirring of solder through the puddler, thereby bring the dross on solder surface into to sweep the sediment net inboard, thereby collect the dross inside sweeping the sediment net, treat that the solder is smelted and take off the joint bar from rotating the stock after accomplishing again, thereby will float the slag clean up, convenient quick clear away the dross.
5. Through setting up wire rope, mount pad, rolling motor and rolling dish, the rolling motor drives the outside wire rope of rolling dish and scatters, makes the one end that rotates stock joint and have the joint bar rotate to the stove in and carry out the dross and sweep and remove, collects the completion back, and rolling motor drives the rolling dish and rotates, makes wire rope winding inside the rolling dish, moves on driving rotation stock, joint bar and sweeping the sediment net, sweeps the use and the removal of sediment net.
6. The addition of the grain refiner has obvious influence on the microstructure and the mechanical property of the lead-free solder welding spot, after the grain refiner is added in a proper amount, no air holes are generated on the welding spot, Cu6Sn5 and Ag3Sn phases in the welding spot solder have small sizes and are easy to disperse and distribute, the beta-Sn primary crystal phase is obviously refined, the shearing strength of the welding spot is reduced after being increased along with the increase of the addition amount of the grain refiner, and the welding spot strength is improved compared with the welding spot strength under the same condition.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the microstructure of a solder plus grain refiner intermetallic compound of the present invention;
FIG. 2 is a schematic view of the microstructure of the eutectic area of the solder joint of the present invention;
FIG. 3 is a schematic view of the construction of the screen of the present invention;
FIG. 4 is a flow chart of the steps of the manufacturing process of the present invention;
FIG. 5 is a schematic cross-sectional structural view of the present invention;
FIG. 6 is a schematic view of the construction of the screen of the present invention;
FIG. 7 is a schematic structural diagram of a stop block of the present invention;
FIG. 8 is a schematic structural view of a skimming mesh according to the present invention;
FIG. 9 is a schematic structural view of the snap rod of the present invention;
FIG. 10 is a schematic view of the construction of the spindle of the present invention;
FIG. 11 is a schematic view of the construction of the coupler slot of the present invention;
reference numbers in the figures: 1. a furnace body;
2. a feeding mechanism; 201. a fixed block; 202. a charging barrel; 203. a connecting shaft; 204. connecting blocks; 205. an arc-shaped stop block; 206. a feed hopper; 207. a limiting block; 208. filtering with a screen; 209. a limiting groove; 210. mounting a plate; 211. an electric push rod; 212. connecting the short shaft; 213. a rotating seat;
3. a stirring mechanism; 301. a support frame; 302. a stirring motor; 303. a transmission box; 304. a rotating shaft; 305. a squeegee; 306. a stirring rod; 307. connecting grooves; 308. connecting holes;
4. a slag sweeping mechanism; 401. positioning a plate; 402. a threaded ring; 403. a threaded rod; 404. a top stop; 405. rotating the long rod; 406. a clamping and connecting rod; 407. a middle block; 408. skimming the slag net; 409. a limiting net; 410. a wire rope; 411. a mounting seat; 412. a winding motor; 413. a winding disc;
5. a discharge hole; 6. and (4) discharging the pipe.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example 1:
as shown in fig. 1-3, the present invention provides a technical solution, a process for producing a lead-free solder oxidation resistant alloy, comprising the following steps:
s1, firstly, putting tin, silver, nickel and bismuth into a furnace body 1 through a feeding mechanism 2, mixing, then adding rare earth neodymium and a grain refiner, arranging a heater at the bottom of the furnace body 1, and arranging a control box at one side of the furnace body 1, wherein the control box controls the heater to heat;
s2, a stirring mechanism 3 for stirring is arranged in the middle of the furnace body 1, normal stirring is carried out, and then scum is swept away through a scum sweeping mechanism 4;
s3, discharging, casting and forming through a discharging hole 5 after smelting to finally obtain the required solder;
and S4, performing label detection on the solder, storing the label after the solder is qualified, and putting the label into a database for recording.
Comprises raw material components and strengthening components;
wherein, the raw material components comprise tin, silver, nickel and bismuth with the purity of 99.95 percent;
the ratio of tin in the solder is 87.0 percent;
the proportion of silver in the solder is 1.2 percent;
the proportion of bismuth in the solder is 9.8 percent;
the proportion of nickel in the solder is 1.0 percent;
the strengthening component comprises rare earth neodymium and a grain refiner;
the rare earth neodymium accounts for 0.9 percent of the solder;
the grain refiner accounts for 0.1 percent.
Example 2:
as shown in fig. 1-3, the present invention provides a technical solution, a process for producing a lead-free solder oxidation resistant alloy, comprising the following steps:
s1, firstly, putting tin, silver, nickel and bismuth into a furnace body 1 through a feeding mechanism 2, mixing, then adding rare earth neodymium and a grain refiner, arranging a heater at the bottom of the furnace body 1, and arranging a control box at one side of the furnace body 1, wherein the control box controls the heater to heat;
s2, a stirring mechanism 3 for stirring is arranged in the middle of the furnace body 1, normal stirring is carried out, and then scum is swept away through a scum sweeping mechanism 4;
s3, discharging, casting and forming through a discharging hole 5 after smelting to finally obtain the required solder;
and S4, performing label detection on the solder, storing the label after the solder is qualified, and putting the label into a database for recording.
Comprises raw material components and strengthening components;
wherein, the raw material components comprise tin, silver, nickel and bismuth with the purity of 99.95 percent;
the ratio of tin in the solder is 87.0 percent;
the proportion of silver in the solder is 1.2 percent;
the proportion of bismuth in the solder is 9.8 percent;
the proportion of nickel in the solder is 1.0 percent;
the strengthening component comprises rare earth neodymium and a grain refiner;
the rare earth neodymium accounts for 0.7 percent of the solder;
the grain refiner accounts for 0.3 percent.
Example 3:
as shown in fig. 1-3, the present invention provides a technical solution, a process for producing a lead-free solder oxidation resistant alloy, comprising the following steps:
s1, firstly, putting tin, silver, nickel and bismuth into a furnace body 1 through a feeding mechanism 2, mixing, then adding rare earth neodymium and a grain refiner, arranging a heater at the bottom of the furnace body 1, and arranging a control box at one side of the furnace body 1, wherein the control box controls the heater to heat;
s2, a stirring mechanism 3 for stirring is arranged in the middle of the furnace body 1, normal stirring is carried out, and then scum is swept away through a scum sweeping mechanism 4;
s3, discharging, casting and forming through a discharging hole 5 after smelting to finally obtain the required solder;
and S4, performing label detection on the solder, storing the label after the solder is qualified, and putting the label into a database for recording.
Comprises raw material components and strengthening components;
wherein, the raw material components comprise tin, silver, nickel and bismuth with the purity of 99.95 percent;
the ratio of tin in the solder is 87.0 percent;
the proportion of silver in the solder is 1.2 percent;
the proportion of bismuth in the solder is 8.1 percent;
the proportion of nickel in the solder is 1.0 percent;
the strengthening component comprises rare earth neodymium and a grain refiner;
the rare earth neodymium accounts for 0.7 percent of the solder;
the grain refiner accounts for 1.0 percent.
Example 4:
as shown in fig. 1-3, the present invention provides a technical solution, a process for producing a lead-free solder oxidation resistant alloy, comprising the following steps:
s1, firstly, putting tin, silver, nickel and bismuth into a furnace body 1 through a feeding mechanism 2, mixing, then adding rare earth neodymium and a grain refiner, arranging a heater at the bottom of the furnace body 1, and arranging a control box at one side of the furnace body 1, wherein the control box controls the heater to heat;
s2, a stirring mechanism 3 for stirring is arranged in the middle of the furnace body 1, normal stirring is carried out, and then scum is swept away through a scum sweeping mechanism 4;
s3, discharging, casting and forming through a discharging hole 5 after smelting to finally obtain the required solder;
and S4, performing label detection on the solder, storing the label after the solder is qualified, and putting the label into a database for recording.
Comprises raw material components and strengthening components;
wherein, the raw material components comprise tin, silver, nickel and bismuth with the purity of 99.95 percent;
the ratio of tin in the solder is 87.0 percent;
the proportion of silver in the solder is 1.2 percent;
the proportion of bismuth in the solder is 9.8 percent;
the proportion of nickel in the solder is 1.0 percent;
the strengthening component comprises rare earth neodymium and a grain refiner;
the rare earth neodymium accounts for 0.7 percent of the solder;
the grain refiner accounts for 2.0 percent.
According to the detection of the solder prepared in the embodiments 1-4, the island Cu6Sn5 phase in the eutectic area of the solder joint without adding the grain refiner has large size and is difficult to disperse and distribute, and when the grain refiner is added in an amount exceeding 0.5%, the Cu6Sn5 phase is easy to gather, merge and grow at the interface of a liquid intermetallic compound, so that the fluidity of the solder is poor, and the soldering flux gas used in the welding process is difficult to escape, thereby forming dense air holes on the welding surface; the addition amount of the grain refiner is within the range of 0.1-0.3%, no air holes are generated in welding spots, Cu6Sn5 and Ag3Sn phases in the welding spot solder are small in size and easy to disperse and distribute, the beta-Sn primary crystal phase is obviously refined, the shear strength of the welding spot is increased and then reduced along with the increase of the addition amount of the grain refiner, the shear strength is maximum when 0.3% of the addition amount is added, and the shear strength is improved by 10.22-30.8% compared with the welding spot strength under the same condition.
The mass fraction (%) of the grain refiner added to the solder is shown in the following table:
as shown in fig. 4-11, the feeding mechanism 2 comprises a fixed block 201, a feeding cylinder 202, a connecting shaft 203, a connecting block 204, an arc-shaped stopper 205, a feeding hopper 206, a limiting block 207, a filter screen 208, a limiting groove 209, a mounting plate 210, an electric push rod 211, a connecting short shaft 212 and a rotating seat 213;
the side end and the front end of the furnace body 1 are respectively welded with a fixed block 201, the top of the fixed block 201 is rotatably provided with a feeding cylinder 202, the outer side of the feeding cylinder 202 is provided with a connecting shaft 203 corresponding to the position of the fixed block 201, the outer side of the fixed block 201 is respectively welded with connecting blocks 204 corresponding to the positions of the two ends of the connecting shaft 203, the middle part of the fixed block 201 is provided with a shaft hole, the connecting shaft 203 is rotatably arranged in the shaft hole, the connecting shaft 203 is welded between the connecting blocks 204 of the chain, so that the connecting shaft 203 can be rotatably arranged, the inner side of the top end of the feeding cylinder 202 is welded with an arc-shaped stop block 205, the top end of the feeding cylinder 202 is welded with a feeding hopper 206 corresponding to the position of the arc-shaped stop block 205, the bottom end of the stop block 207 and the top end of the arc-shaped stop block 205 are clamped with a filter screen 208, the position of the furnace mouth of the furnace body 1 is provided with a stop groove 209, the bottom end of the furnace body 1 is welded with a mounting plate 210, and the top end of the mounting plate 210 is provided with an electric push rod 211, electric putter 211's promotion end joint has the connection minor axis 212, it has the rotation seat 213 to correspond to connect minor axis 212 position department welding to add feed cylinder 202 bottom, electric putter 211's input and external power source's output electric connection, electric putter 211 promotes the end and has seted up and has rotated the round hole, it installs inside rotating the round hole to connect minor axis 212 rotation, the both ends of connecting minor axis 212 weld in rotating seat 213 middle part position, conveniently connect minor axis 212 and rotate between the seat 213 and be connected.
The stirring mechanism 3 comprises a support frame 301, a stirring motor 302, a transmission box 303, a rotating shaft 304, a scraping plate 305, a stirring rod 306, a connecting groove 307 and a connecting hole 308;
1 mouth of a furnace position department welding of furnace body has support frame 301, support frame 301 one end bottom is rotated and is installed agitator motor 302, agitator motor 302's input and external power source's output electric connection, support frame 301's top welding has transmission box 303, the bottom of transmission box 303 is rotated and is installed pivot 304, the inboard both ends of transmission box 303 are all grabbed and are installed the rotation wheel, the outside meshing that rotates the wheel is connected with the chain, agitator motor 302 output shaft and pivot 304 all with rotate wheel fixed connection, make things convenient for agitator motor 302 to drive pivot 304 and rotate the stirring, the welding of pivot 304 bottom has scraper blade 305, the inboard welding of scraper blade 305 has puddler 306, a plurality of spread groove 307 have been seted up to scraper blade 305's bottom equidistance, connecting hole 308 has been seted up to a spread groove position department equidistance in the middle of corresponding to scraper blade 305's bottom.
The slag sweeping mechanism 4 comprises a positioning plate 401, a threaded ring 402, a threaded rod 403, a top stop block 404, a rotary long rod 405, a clamping rod 406, a middle stop block 407, a slag sweeping net 408, a limiting net 409, a steel wire rope 410, a mounting seat 411, a winding motor 412 and a winding disc 413;
the front end face of the support frame 301 is welded with a positioning plate 401, the top of the positioning plate 401 is welded with a threaded ring 402, the middle part of the threaded ring 402 is in threaded connection with a threaded rod 403, one end of the top of the positioning plate 401 is welded with a top stop block 404, the outer part of the threaded rod 403 is rotatably sleeved with a rotating long rod 405, the middle part of the rotating long rod 405 is provided with a rotating hole, the threaded rod 403 is rotatably installed in the rotating hole, the rotating long rod 405 is conveniently and rotatably connected through the threaded rod 403, the outer part of the rotating long rod 405 is clamped with a clamping rod 406, the middle stop block 407 is welded at the middle part of the rotating long rod 405 corresponding to the end part of the clamping rod 406, the bottom end of the clamping rod 406 is welded with a skimming mesh 408, one end of the skimming mesh 408 is welded with a limiting mesh 409, the skimming mesh 408 is of an L-shaped structure, the bottom end of the limiting mesh 409 is welded and fixed with the bottom end of the skimming mesh 408, skimming scum is convenient, one end of the rotating long rod 405 is embedded with a steel wire rope 410, the welding of furnace body 1 bottom has mount pad 411, and winding motor 412 is installed to mount pad 411 one side, winding motor 412's input and external power source's output electric connection, and winding disc 413 has been welded to winding motor 412's output shaft one end, and the one end of wire rope 410 twines in the outside of winding disc 413, conveniently to receiving and releasing of wire rope 410.
The working principle and the using process of the invention are as follows: when the raw materials are added, the filter screen 208 is clamped between the limiting block 207 and the arc-shaped stop block 205 to fix the filter screen 208, then raw materials are added from the feed hopper 206, filtered by the filter screen 208 and then enter the feeding cylinder 202 to be collected, then the filter screen 208 is pulled out from between the limit block 207 and the arc-shaped stop block 205, the filter screen 208 and the filtered impurities are taken down, after the preparation of the raw materials is completed, the bottom of the feeding cylinder 202 is pushed to move upwards through the electric push rod 211, the feeding cylinder 202 rotates along the fixed block 201, thereby, the mouth of the charging barrel 202 moves downwards, the charging barrel 202 is clamped with the limiting groove 209, the raw materials in the feeding cylinder 202 are poured into the furnace, so that the raw materials can be contained, the feeding can be pushed through the electric push rod 211, the manual operation is not needed, the feeding is more convenient, and the safety of workers is not improved easily due to the high temperature of the smelting furnace;
after the feeding is finished, the power supply of the stirring motor 302 is connected, the stirring motor 302 drives the rotating shaft 304 to rotate through the transmission box 303, and further drives the scraping plate 305 and the stirring rod 306 to rotate, so that the raw materials in the furnace body 1 are uniformly stirred and mixed, the smelting effect is better, after the smelting is finished, the molten solder can move downwards to the position of the connecting hole 308 along the stirring rod 306, the solder on the two sides of the scraping plate 305 flows through the connecting groove 307, the solder is convenient to uniformly mix, and finally the smelted solder is discharged through the discharging hole 5 and the discharging pipe 6;
after the solder is mixed and melted, scum is remained on the surface of the solder, a power supply of a winding motor 412 is connected, the winding motor 412 drives a steel wire rope 410 outside a winding disc 413 to be scattered, one end of a long rotating rod 405 clamped with a clamping rod 406 rotates towards the inside of the furnace under the action of gravity, a skimming mesh 408 is arranged on the surface of the melted solder, the solder is driven by a stirring rod 306 to rotate and stir, so that the scum on the surface of the solder is brought into the inner side of the skimming mesh 408, the scum is collected inside the skimming mesh 408, after the collection is completed, the winding motor 412 drives the winding disc 413 to rotate, the steel wire rope 410 is wound inside the winding disc 413, so that the long rotating rod 405, the clamping rod 406 and the skimming mesh 408 are driven to move upwards, the scum is moved out, the clamping rod 406 is taken down from the long rotating rod 405 after the solder is melted, the scum is cleaned, and the scum is conveniently and quickly cleaned.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A production and preparation process of lead-free solder oxidation resistant alloy is characterized by comprising the following steps:
s1, firstly, putting tin, silver, nickel and bismuth into a furnace body (1) through a feeding mechanism (2), mixing, then adding rare earth neodymium and a grain refiner, arranging a heater at the bottom of the furnace body (1), and arranging a control box at one side of the furnace body (1) to control the heater to heat;
s2, a stirring mechanism (3) for stirring is arranged in the middle of the furnace body (1) for normal stirring, and then skimming is performed through a skimming mechanism (4);
s3, discharging, casting and forming through a discharging hole (5) after smelting, and finally obtaining the required solder;
and S4, performing label detection on the solder, storing the label after the solder is qualified, and putting the label into a database for recording.
2. The lead-free solder oxidation-resistant alloy according to claim 1, comprising a raw material component and a strengthening component;
wherein, the raw material components comprise tin, silver, nickel and bismuth with the purity of 99.95 percent;
the ratio of tin in the solder is 82.2-90.2%;
the proportion of silver in the solder is 1.0-2.5%;
the proportion of bismuth in the solder is 7.5-12.5%;
the proportion of nickel in the solder is 0.8-1.8%;
the strengthening component comprises rare earth neodymium and a grain refiner;
the rare earth neodymium accounts for 0.5 to 1.0 percent of the solder;
the grain refiner accounts for 0.1-5.0%.
3. The production and preparation process of the lead-free solder antioxidant alloy according to claim 2, wherein the feeding mechanism (2) comprises a fixed block (201), a feeding cylinder (202), a connecting shaft (203), a connecting block (204), an arc-shaped stop block (205), a feeding hopper (206), a limiting block (207), a filter screen (208), a limiting groove (209), a mounting plate (210), an electric push rod (211), a connecting short shaft (212) and a rotating seat (213);
fixed blocks (201) are welded at the side end and the front end of the furnace body (1), a feeding cylinder (202) is installed at the top of the fixed blocks (201) in a rotating mode, a connecting shaft (203) is installed at the position, corresponding to the fixed blocks (201), of the feeding cylinder (202), connecting blocks (204) are welded at the two ends of the fixed blocks (201), arc-shaped stoppers (205) are welded at the inner side of the top end of the feeding cylinder (202), a feeding hopper (206) is welded at the position, corresponding to the arc-shaped stoppers (205), of the top end of the feeding cylinder (202), a limiting block (207) is welded at the inner bottom of the feeding hopper (206), a filter screen (208) is clamped at the bottom end of the limiting block (207) and the top end of the arc-shaped stoppers (205), a limiting groove (209) is formed at the position of a furnace body (1) furnace mouth, and a mounting plate (210) is welded at the bottom end of the furnace body (1), electric putter (211) are installed on the top of mounting panel (210), electric putter (211) promote the end joint to have and connect minor axis (212), it has rotation seat (213) to correspond connection minor axis (212) position department welding in charging barrel (202) bottom.
4. The production and preparation process of the lead-free solder antioxidant alloy as claimed in claim 3, wherein a shaft hole is formed in the middle of the fixing block (201), the connecting shaft (203) is rotatably mounted inside the shaft hole, and the connecting shaft (203) is welded between the connecting blocks (204) of the chain.
5. The production and preparation process of the lead-free solder antioxidant alloy as claimed in claim 3, wherein the input end of the electric push rod (211) is electrically connected with the output end of an external power supply, the push end of the electric push rod (211) is provided with a rotating circular hole, the connecting short shaft (212) is rotatably installed inside the rotating circular hole, and the two ends of the connecting short shaft (212) are welded at the middle position of the rotating seat (213).
6. The production and preparation process of the lead-free solder oxidation-resistant alloy according to claim 2, wherein the stirring mechanism (3) comprises a support frame (301), a stirring motor (302), a transmission box (303), a rotating shaft (304), a scraper (305), a stirring rod (306), a connecting groove (307) and a connecting hole (308);
furnace body (1) fire door position department welding has support frame (301), support frame (301) one end bottom is rotated and is installed agitator motor (302), the top welding of support frame (301) has transmission box (303), the bottom of transmission box (303) is rotated and is installed pivot (304), pivot (304) bottom welding has scraper blade (305), scraper blade (305) inboard welding has puddler (306), a plurality of spread grooves (307) have been seted up to the bottom equidistance of scraper blade (305), connecting hole (308) have been seted up to a spread groove (307) position department equidistance in the middle of the bottom correspondence of scraper blade (305).
7. The production and preparation process of the lead-free solder antioxidant alloy as claimed in claim 6, wherein the input end of the stirring motor (302) is electrically connected with the output end of an external power supply;
rotating wheels are arranged at two ends of the inner side of the transmission box (303) in a grabbing and touching mode, chains are connected to the outer portions of the rotating wheels in a meshed mode, and an output shaft of the stirring motor (302) and the rotating shaft (304) are fixedly connected with the rotating wheels.
8. The production and preparation process of the lead-free solder antioxidant alloy according to claim 6, wherein the slag skimming mechanism (4) comprises a positioning plate (401), a threaded ring (402), a threaded rod (403), a top stop block (404), a long rotating rod (405), a clamping rod (406), a middle stop block (407), a slag skimming mesh (408), a limiting mesh (409), a steel wire rope (410), a mounting seat (411), a winding motor (412) and a winding disc (413);
the end face welding has locating plate (401) before support frame (301), the top welding of locating plate (401) has screw thread ring (402), threaded ring (402) middle part threaded connection has threaded rod (403), the welding of locating plate (401) top one end has top dog (404), threaded rod (403) outside is rotated and has been cup jointed and is rotated stock (405), the outside joint of rotating stock (405) has joint pole (406), the welding of the corresponding joint pole (406) tip position in rotation stock (405) middle part has middle part dog (407), the welding of joint pole (406) bottom has skimming slag net (408), it has limiting net (409) to sweep slag net (408) one end to be close to middle part dog (407) position department welding, it installs wire rope (410) to rotate stock (405) one end embedding, the welding of furnace body (1) bottom has mount pad (411), a winding motor (412) is installed on one side of the installation seat (411), and a winding disc (413) is welded at one end of an output shaft of the winding motor (412).
9. The production and preparation process of the lead-free solder antioxidant alloy as claimed in claim 8, wherein a rotary hole is formed in the middle of the rotary long rod (405), and the threaded rod (403) is rotatably mounted inside the rotary hole;
the skimming mesh (408) is of an L-shaped structure, and the bottom end of the limiting mesh (409) is welded and fixed with the bottom end of the skimming mesh (408).
10. The production and preparation process of the lead-free solder antioxidant alloy as claimed in claim 8, wherein one end of the steel wire rope (410) is wound outside the winding disc (413), and the input end of the winding motor (412) is electrically connected with the output end of an external power supply.
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Application publication date: 20210921 |