CN104907723A - Flux-cored silver brazing filler metal with toughening alloy - Google Patents
Flux-cored silver brazing filler metal with toughening alloy Download PDFInfo
- Publication number
- CN104907723A CN104907723A CN201510269707.7A CN201510269707A CN104907723A CN 104907723 A CN104907723 A CN 104907723A CN 201510269707 A CN201510269707 A CN 201510269707A CN 104907723 A CN104907723 A CN 104907723A
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- China
- Prior art keywords
- silver
- alloy
- solder
- brazing
- filler metal
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Classifications
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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
- B23K35/22—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
-
- 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
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
- B23K35/3603—Halide salts
- B23K35/3605—Fluorides
-
- 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
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
- B23K35/3606—Borates or B-oxides
Abstract
The invention discloses flux-cored silver brazing filler metal with toughening alloy. The flux-cored silver brazing filler metal comprises a silver base brazing filler metal skin and core powder, the silver base brazing filler metal skin is filled with the core powder, and the core powder is formed by mixing brazing flux, silver alloy and copper alloy. Sn, Ni, Si and other elements are added into the brazing flux in the form of intermediate alloy, when the concentration of the alloying elements of the brazing filler metal skin is low, it can still be guaranteed that the brazing filler metal skin has excellent processing performance, the brazing filler metal has good wettability and fluidity, meanwhile, weld strength, the low-temperature impact toughness and the anti-cracking ability are improved, and ductile-brittle transition temperature is lowered. On the premise of not changing the components of the skin, weld joints with different components can be obtained by flexibly adjusting the proportion of metal in the core powder. When a large-gap assembly is brazed, it can be ensured that the brazing filler metal has enough filler content. The brazing flux can be pre-added conveniently and efficiently, the advantages of being convenient to assemble in the brazing process, achieving automatic production easily, being low in cost and the like are achieved, and an automatic brazing process can be applied and popularized conveniently.
Description
Technical field
The present invention relates to welding material, especially relate to a kind of medicine core silver solder carrying increasing tougheness alloy.
Background technology
Silver solder fusing point is moderate, welding usability good, and has good intensity, toughness, electric conductivity, thermal conductivity and corrosion resistance, is a most widely used class hard solder.China's air-conditioning, refrigeration industry touch the bottom and bounce back up after economic crisis low ebb experienced by 2008 in recent years; particularly within 2013, go to the countryside at national Urbanization Construction, household electrical appliances, under the support on policy such as energy-conservation Huimin subsidy; rapid stabilization is gone up, and the application for silver solder provides the space of sustainable growth.
Traditional soldering processes be with silk or strip brazing solder glue brazing flux use or with gas flux or heating before in advance brazing flux is coated on workpiece, solder consumption cannot ensure, and easily there is welding shortcoming, the thing followed is done over again, reprocesses and even scrap, cause brazing solder and raw-material waste, increase manufacturing cost.In addition, the process that solder glues brazing flux or applies brazing flux in advance adds operation before once weldering, adds operation and operating time, and increase a variable in soldering processes, thus the uniformity of impact welding and the stability of quality; Gas flux is not active, removes oxide-film effect poor.Due to this kind of soldering processes complexity, production efficiency is low, cost is high, not easily accurately control the consumption of brazing flux, so often occur that brazing flux adds too much or non-uniform phenomenon, not only waste brazing flux in a large number, and the more difficult cleaning of brazing flux residue of postwelding surface of the work remnants, perishable joint; Joint quality depends on the individual level of operator more in addition.
Along with modernization manufacturing industry strengthens, the control of brazing cost (is shown as to automatic welding and replaces the higher manual welding of human cost gradually, the accurate control of brazing solder consumption), and the attention rate of outer bound pair corporate environmental responsibility continues to increase, medicine core brazing solder arises at the historic moment under this industrial upgrading demand.
Medicine core brazing solder is rolled by a certain proportion of powder brazing flux of cap copper braze-clad to form, it is compared with traditional real core solder, have the following advantages: medicine core brazing solder carries brazing flux, the operation of adding brazing flux is decreased during brazing operation, have that welding efficiency is high, constituent adjustment flexibly, energy-saving material-saving, solder flux consumption be few, pollute the advantages such as little, appearance of weld is attractive in appearance, is applicable to continuous automatic welding.
The ratio of current medicine core solder shared by automatic welding is increasing, but just there is processing difficulties when the constituent content such as tin, nickel, manganese is higher in existing medicine core silver solder, the powder brazing flux of the coated predetermined ratio of banded silver solder rolls and adds the problems such as man-hour is easily broken, is difficult to processing patent medicine core solder.The fusion temperature of the silver-bearing copper tin solder that Theil indices is higher can fall too low, but fragility is larger, experiment proves, when stanniferous amount is less than 12.5% in ag-cu solder, there is good ductility, when stanniferous amount is greater than 12.5%, alloy plasticity significantly declines, and there is red brittleness at about 480 DEG C, the fusion temperature of such as BAg45Cu35Sn20 solder is 550 ~ 600 DEG C, it can only process reluctantly at 450 ~ 520 DEG C of temperature, still its fragility cannot be overcome, so the Theil indices in silver-colored tin solder is general not higher than 10% through hot worked solder.In addition, owing to needing to guarantee that solder has certain loading when the soldering of wide arc gap assembly, and when preparing the solder skin of medicine core solder, if the blocked up difficulty of processing that will increase of solder skin, also have impact on the application of medicine core solder when wide-gap brazing.
Summary of the invention
The object of the present invention is to provide a kind of high tenacity, alloy loading large, the medicine core silver solder carrying increasing tougheness alloy that is efficient, automation soldering needs can be met.
For achieving the above object, the present invention can take following technical proposals:
The medicine core silver solder carrying increasing tougheness alloy of the present invention, comprise silver-base solder crust and the core powder being filled in the outer intracutaneous of described silver-base solder, described core powder is mixed by brazing flux, silver alloy, copper alloy.
Described brazing flux mixes by more than at least one or two in inorganic fluoride, potassium fluoborate, boric anhydride, borate, potassium fluoroaluminate, pure boron;
Described silver alloy is the mixed powder of at least one composition in Ag powder and Cu, Ni, Si, Sn, Mn simple substance powder, or the intermediate alloy for being formed after at least one element melting in Ag and Cu, Zn, Ni, Si, Sn, Mn;
Described copper alloy is the mixed powder of at least one composition in Cu and Zn, Ni, Si, Sn, Mn, P simple substance powder, or Cu and Zn, the intermediate alloy that formed after at least one element melting in Ni, Si, Sn, Mn, P.
Described core powder accounts for 8% ~ 35% of medicine core silver solder gross weight.
In described silver-base solder crust, the percentage by weight of each composition is: silver-colored Ag:1.5 ~ 65.0%, copper Cu:15.0 ~ 56.0%, zinc Zn:4 ~ 30.0%, tin Sn:0 ~ 6.0%, cadmium Cd:0 ~ 25.0%, nickel: 0 ~ 6.0%, manganese Mn:0 ~ 8.0%, silicon Si:0 ~ 5.0%, trace element 0 ~ 1.0%; Described trace element takes from least one in Pd, Ga, In, Zr, Sb, Li, Re.
The wall thickness of described silver-base solder crust is 0.1 ~ 0.8 mm.
The preparation method of medicine core silver solder of the present invention is Conventional processing methods, the solder bar that length is 100 ~ 1000 mm can be processed into, or the ring bodies with hollow structure is turned to elongated solder: can be individual pen structure, also can be at least two circle helical annular structures of coiling vertically, the spacing≤1.0mm between adjacent ring.
The invention has the advantages that and in brazing flux, with the addition of the metallic elements such as Sn, Ni, Si with the form of intermediate alloy, when in solder crust, alloying element content is lower, still can ensure that it has excellent processing characteristics, solder has good wetability and mobility, improve the intensity of weld seam and low-temperature impact toughness and cracking resistance simultaneously, reduce ductile-brittle transition temperature.Simultaneously under the prerequisite not changing crust composition, obtain the weld seam of different component by the metal ratio adjusted flexibly in core powder; Can guarantee that solder has enough loadings when soldering wide arc gap assembly.Present invention achieves brazing flux convenient, add in advance efficiently, easy to assembly when there is soldering, easily realize automated production, low cost and other advantages, be conducive to applying of automation soldering processes.
Detailed description of the invention
Below by specific embodiment, the present invention will be further described in detail.
embodiment 1
Of the present inventionly carry increasing tougheness alloyed powder medicine core pattern silver solder, its preparation method is as follows:
A) silver, copper, zinc prepared in proportion and carry out melting, being cast into the bar-shaped BAg45Cu30Zn25 solder ingot casting of Φ 50 mm, cut rising head then ladle barrow is pruned descale stand-by;
B) solder extrusion equipment is warming up to 460 DEG C, the ingot casting that car is good is placed in preheating in Muffle furnace, preheat temperature is 470 DEG C, preheated ingot casting is put into the mould cylinder of extrusion equipment, be squeezed into the strip brazing material of thickness 5.0 mm, width 8.5mm, and roll, cut, solder band that Ultrasonic Cleaning, oven dry, tape splicing are made into thickness 0.2 mm, width 7.5mm;
C) core powder is made up of borax, potassium fluoride, potassium fluoborate, boric acid, Cu-20Ni alloy and Cu-20Si alloy, the percentage by weight of each composition is: 4% borax, 2% potassium fluoride, 8% potassium fluoborate, 25%Cu-20Ni alloy, 15%Cu-20Si alloy, and surplus is boric acid; Powder size is 200 orders, with ball mill mixing machine first the mixing of medicine core powder, dries 200min, cool stand-by in the low vacuum drying case of 100 DEG C ~ 130 DEG C;
D) solder band is rolled into metal tube (silver-base solder crust), in coiling process, core powder is added in metal tube;
E) metal tube containing core powder is made the medicine core solder finished product of required size by rolling or drawing.
This finished medicines core silver solder is applicable to the joint of soldering steel-steel, copper-copper alloy, steel-copper alloy.
embodiment 2
Silver-base solder crust is identical with embodiment 1, core powder is made up of potassium fluoride, potassium fluoborate, boric anhydride, BAg56Cu31Sn10Mn3 alloy, Cu-20Ni alloy and Cu-14P alloy, the percentage by weight of each composition is: 1% potassium fluoride, 7% potassium fluoborate, 33%BAg56Cu31Sn10Mn3 alloy, 30%Cu-20Ni alloy, 12%Cu-14P alloy, and surplus is boric anhydride.
This finished medicines core silver solder is applicable to the joint of copper brazing alloy.
embodiment 3
Silver-base solder crust is identical with embodiment 1, core powder is made up of borax, potassium fluoride, potassium fluoborate, boric acid, Cu-20Ni alloy, Cu-20Si alloy and BAg40Cu25Zn30.5Sn3Ni1.5 alloy, the percentage by weight of each composition is: 4% borax, 2% potassium fluoride, 8% potassium fluoborate, 25%Cu-20Ni alloy, 15%Cu-20Si alloy, 44%BAg40Cu25Zn30.5Sn3Ni1.5 alloy, and surplus is boric acid.
embodiment 4
Pass through Reasonable adjustment mould by the silver-base solder crust of the proportions in embodiment 1 and the medicine core silver solder of core powder composition, can be made into the individual pen ring-type solder that central diameter is Φ 8.0 mm, and increase pressing technique.
Claims (5)
1. carry a medicine core silver solder for increasing tougheness alloy, comprise silver-base solder crust and the core powder being filled in the outer intracutaneous of described silver-base solder, it is characterized in that: described core powder is mixed by brazing flux, silver alloy, copper alloy.
2. the medicine core silver solder carrying increasing tougheness alloy according to claim 1, is characterized in that: described brazing flux mixes by more than at least one or two in inorganic fluoride, potassium fluoborate, boric anhydride, borate, potassium fluoroaluminate, pure boron;
Described silver alloy is the mixed powder of at least one composition in Ag powder and Cu, Ni, Si, Sn, Mn simple substance powder; Or be the intermediate alloy formed after at least one element melting in Ag and Cu, Zn, Ni, Si, Sn, Mn;
Described copper alloy is the mixed powder of at least one composition in Cu and Zn, Ni, Si, Sn, Mn, P simple substance powder, or Cu and Zn, the intermediate alloy that formed after at least one element melting in Ni, Si, Sn, Mn, P.
3. the medicine core silver solder carrying increasing tougheness alloy according to claim 1, is characterized in that: described core powder accounts for 8% ~ 35% of medicine core silver solder gross weight.
4. the medicine core silver solder carrying increasing tougheness alloy according to claim 1, is characterized in that: in described silver-base solder crust, the percentage by weight of each composition is: silver-colored Ag:1.5 ~ 65.0%, copper Cu:15.0 ~ 56.0%, zinc Zn:4 ~ 30.0%, tin Sn:0 ~ 6.0%, cadmium Cd:0 ~ 25.0%, nickel: 0 ~ 6.0%, manganese Mn:0 ~ 8.0%, silicon Si:0 ~ 5.0%, trace element 0 ~ 1.0%; Described trace element takes from least one in Pd, Ga, In, Zr, Sb, Li, Re.
5. the medicine core silver solder carrying increasing tougheness alloy according to claim 1, is characterized in that: the wall thickness of described silver-base solder crust is 0.1 ~ 0.8 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510269707.7A CN104907723B (en) | 2015-05-25 | 2015-05-25 | Carry the medicine core silver solder of increasing tougheness alloy |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510269707.7A CN104907723B (en) | 2015-05-25 | 2015-05-25 | Carry the medicine core silver solder of increasing tougheness alloy |
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| CN104907723A true CN104907723A (en) | 2015-09-16 |
| CN104907723B CN104907723B (en) | 2017-08-25 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105965175A (en) * | 2016-05-20 | 2016-09-28 | 浙江新锐焊接科技股份有限公司 | Low-silver brazing filler metal used for high-frequency brazing of four-way valve |
| CN106271191A (en) * | 2016-08-31 | 2017-01-04 | 郑州机械研究所 | A kind of green high-strength low temperature composite soldering and preparation method thereof |
| CN106346165A (en) * | 2016-08-30 | 2017-01-25 | 郑州机械研究所 | High-tin-content silver welding rod and manufacturing method thereof |
| CN108788534A (en) * | 2018-05-15 | 2018-11-13 | 雷山县弘悦银饰有限责任公司 | A kind of silver jeweleries welding rod production method |
| CN109202331A (en) * | 2018-11-01 | 2019-01-15 | 江苏科技大学 | A kind of medicine core silver solder with excellent fluidity |
| WO2019119281A1 (en) * | 2017-12-19 | 2019-06-27 | 郑州机械研究所有限公司 | Solder outer skin and preparation method thereof, in-situ synthesized metallic coated flux-cored silver solder and preparation method thereof, soldering method and connector |
| CN113579559A (en) * | 2021-09-14 | 2021-11-02 | 中机智能装备创新研究院(宁波)有限公司 | Flux-cored silver solder with indium protective layer and preparation method |
| CN114193026A (en) * | 2021-12-30 | 2022-03-18 | 郑州机械研究所有限公司 | High-silver brazing filler metal for welding pure silver jewelry and preparation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105965175A (en) * | 2016-05-20 | 2016-09-28 | 浙江新锐焊接科技股份有限公司 | Low-silver brazing filler metal used for high-frequency brazing of four-way valve |
| CN106346165A (en) * | 2016-08-30 | 2017-01-25 | 郑州机械研究所 | High-tin-content silver welding rod and manufacturing method thereof |
| CN106346165B (en) * | 2016-08-30 | 2019-02-05 | 郑州机械研究所 | A kind of high tin silver solder and preparation method thereof |
| CN106271191A (en) * | 2016-08-31 | 2017-01-04 | 郑州机械研究所 | A kind of green high-strength low temperature composite soldering and preparation method thereof |
| CN106271191B (en) * | 2016-08-31 | 2018-09-21 | 郑州机械研究所有限公司 | A kind of high-strength low temperature composite soldering of green and preparation method thereof |
| WO2019119281A1 (en) * | 2017-12-19 | 2019-06-27 | 郑州机械研究所有限公司 | Solder outer skin and preparation method thereof, in-situ synthesized metallic coated flux-cored silver solder and preparation method thereof, soldering method and connector |
| CN108788534A (en) * | 2018-05-15 | 2018-11-13 | 雷山县弘悦银饰有限责任公司 | A kind of silver jeweleries welding rod production method |
| CN109202331A (en) * | 2018-11-01 | 2019-01-15 | 江苏科技大学 | A kind of medicine core silver solder with excellent fluidity |
| CN113579559A (en) * | 2021-09-14 | 2021-11-02 | 中机智能装备创新研究院(宁波)有限公司 | Flux-cored silver solder with indium protective layer and preparation method |
| CN114193026A (en) * | 2021-12-30 | 2022-03-18 | 郑州机械研究所有限公司 | High-silver brazing filler metal for welding pure silver jewelry and preparation method thereof |
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