CN106001999B - A kind of brazing flux and preparation method for being used to be brazed magnesium-rare earth - Google Patents
A kind of brazing flux and preparation method for being used to be brazed magnesium-rare earth Download PDFInfo
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- CN106001999B CN106001999B CN201610422965.9A CN201610422965A CN106001999B CN 106001999 B CN106001999 B CN 106001999B CN 201610422965 A CN201610422965 A CN 201610422965A CN 106001999 B CN106001999 B CN 106001999B
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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
- B23K35/36—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
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Abstract
The invention discloses a kind of for being brazed the brazing flux of magnesium-rare earth, the elemental composition of the brazing flux by weight percentage includes：ZnF21.0 5.0%, ZnCl26.5% 9.0%, NaF4.0% 6.5%, LiF1.0% 4.0%, NaCl8.5% 15%, LiCl25% 45%, surplus KCl.The isolation that the brazing flux energy of the present invention is fabulous is brazed surface and outside air, avoids reoxidizing after welding surface is heated in brazing process, improves wetting and filling of the magnesium-based brazing filler metal to magnesium-rare earth soldered fitting, improves the switching performance of soldered fitting；The brazing flux fusing point is 350 DEG C 370 DEG C, and cost of material is cheap, at low cost, good economy performance, simple, convenient quick, repeats and reproduces, convenient for promoting and applying.
Description
Technical field
The present invention relates to for being brazed the brazing flux of magnesium-rare earth and preparation method, belong to soldering field.
Background technology
Magnesium has high chemism, is extremely easy to oxygen and forms stable MgO, is difficult to remove positioned at Mg alloy surface.Pricker
When welding magnesium and magnesium alloy, since the presence of oxidation film leads to liquid solder difficulty and base material wetting and spreading, the soldering caused connects
Second-rate, intensity is relatively low.Oxide film dissolving is gone mainly to be situated between as committed step in brazing process by brazing flux striping, gas
Matter striping, machinery and physics striping.Brazing flux removes film method as most widely used, most effective at present, in liquid solder and mother
Material plays a major role during soaking.
Application number：201210448154.8 a kind of brazing flux for welding aluminium alloy containing magnesium, composition include AlF3- CsF systems
Brazing flux, ZnF2And SnF2；Wherein AlF3：CsF (molar ratio)=42.5: 47.5 or 41.5: 48.5；The quality hundred respectively formed
Divide than being AlF3- CsF97.5%-99.5%, ZnF20.2%-2.0%, SnF20.1%-0.5%.But brazing flux was using
Cheng Zhong, when content of magnesium is higher, solder can not liquid phase, influence the mobility and wetability of solder, the performance of brazing flux inhibited to imitate
Fruit.In addition, the price of the main CsF for playing striping is costly, the cost of production is considerably increased.Meanwhile the fusing point of brazing flux
It is higher, it is unfavorable for magnesium-rare earth soldering.Application number：201510339134.0 a kind of soldering magnesium and pricker used for magnesium alloy of invention
Agent, the mass percent respectively formed are ZnCl20%-40%, NH4Cl0%-40%, ZnCl2And NH4It is during Cl differences
Zero, surplus for adipic acid and unavoidably to impurity.The brazing temperature of the brazing flux is relatively low, when brazing temperature is higher,
It can not go to meet brazing requirements, weaken striping effect, can not ensure the quality and performance of magnesium-rare earth soldered fitting.Cause
This, to develop a kind of brazing flux suitable for magnesium-rare earth soldering, ensures that it removes membrane property and good reactivity with superior
Can, it improves in brazing process, superior wetability and mobility between solder and magnesium-rare earth, improves the connectivity of soldered fitting
Energy.
Invention content
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention provides one kind for being brazed rare earth magnesium conjunction
The brazing flux and preparation method of gold, the brazing flux have the characteristics that suitable fusing point, good economy performance, it is excellent remove membrane property, expand it
Application range.
Technical solution：In order to solve the above technical problems, a kind of brazing flux for being used to be brazed magnesium-rare earth of the present invention, the pricker
The elemental composition of agent by weight percentage includes：ZnF21.0-5.0%, ZnCl26.5%-9.0%, NaF4.0%-6.5%,
LiF1.0%-4.0%, NaCl8.5%-15%, LiCl25%-45%, surplus KCl.
Preferably, the elemental composition of the brazing flux by weight percentage includes：ZnF22.0-4.0%, ZnCl28.0%-
9.0%, NaF4.0%-6.0%, LiF1.0%-3.0%, NaCl10%-14%, LiCl30%-40%, surplus KCl.
Preferably, the brazing flux each component mass percentage content is as follows：ZnF23.0%, ZnCl28.5%,
NaF5.0%, LiF2.0%, NaCl12%, LiCl35%, surplus KCl.
Preferably, brazing flux each group is divided into high-purity dried powder.
Preferably, the brazing temperature of the brazing flux is 425 DEG C -475 DEG C.
A kind of above-mentioned preparation method for being used to be brazed the brazing flux of magnesium-rare earth, grinds 20-30min by each component, stirs
It mixes uniformly, and dries 15-20min in 50-60 DEG C and be made.
Advantageous effect：The brazing flux for being used to be brazed magnesium-rare earth of the present invention, LiCl, NaCl and KCl are controlled as matrix
The fusing point of brazing flux has solder and is consistent fusing point, meets the brazing temperature requirement of magnesium-rare earth solder, and ensures brazing flux
Chemical stability.Viscosity between brazing flux and solder is reduced using suitable LiF, NaF and ZnF, is reduced between solder and brazing flux
Interfacial tension, so as to not only ensure it with excellent striping effect, but also ensure that solder being capable of better wetting and spreading base material.
ZnCl also serves as a kind of stripper, reacts generation complex compound dissolving MgO after water suction with water；The oxidation film of magnesium alloy is not loose fine and close
And be unevenly distributed, heavy metal Zn Cl, ZnF of heating can be by oozing at the crystal grain in the weak area of oxidation film or from cracks
Enter, destroy the combination of oxidation film and matrix；Zn simultaneously2+As metal ion, electrode potential is more than the electrode potential of Mg, with base
Displacement reaction can occur after body contact to be precipitated in magnesium alloy metal surface, promote the wetting ability of solder.The brazing flux can be fabulous
Isolation soldering surface and outside air, avoid reoxidizing after welding surface is heated in brazing process, improve magnesium-based brazing filler metal pair
The wetting and filling of magnesium-rare earth soldered fitting improve the switching performance of soldered fitting.The brazing flux fusing point for 350 DEG C-
370 DEG C, cost of material is cheap, at low cost, good economy performance, simple, convenient quick, repeats and reproduces, convenient for promoting with answering
With.
Specific embodiment
Technical solution of the present invention is further elaborated below by specific embodiment, but the present invention and not only office
It is limited to following embodiment.
Embodiment 1
The ZnF of high-purity is weighed by mass percentage2、ZnCl2, NaF, LiF, NaCl, LiCl, KCl powder, be made brazing flux
It matches and is：ZnF22.0%th, ZnCl29.0%th, the mixing of NaF4.0%, LiF3.0%, NaCl10%, LiCl40%, KCl32%
Object is put into grinding alms bowl and is ground 25min, stirs evenly, since chloride easily absorbs water, dried in 55 DEG C
20min, i.e., with i.e. use.
According to GB1136-89《It is brazed spreadability and clearance fillability test method》Solder spreadability test is carried out, rare earth magnesium is closed
Golden specimen size is 40mm × 40mm × 3mm, and section to be sprawled is 40mm × 40mm, and section to be welded is cleared up, and removes table
Impurity, greasy dirt and the oxidation film in face are ground smooth and with certain coarse using W28~W3.5 abrasive paper for metallograph
Degree, magnesium-rare earth coupon and solder are placed in acetone together, using ultrasonic cleaning 10min, and carry out drying and processing
For use；Solder for the consistent 1g of shape magnesium-based brazing filler metal (10%Zn, 8.5%Al, 4.5%Ni, 2.0%Ag, 1.4%Ti,
1.5%Cu, 0.8%Mn, 71.3%Mg)；It carries out sprawling experiment in the chamber type electric resistance furnace for being ± 5 DEG C in precision, brazing temperature is
450 DEG C, soaking time 15min is cooled to room temperature.
As a result：Magnesium-rare earth sprawls sample interface and forms fine and close combination, spreading area 87.52mm2。
Embodiment 2：
The ZnF of high-purity is weighed by mass percentage2、ZnCl2, NaF, LiF, NaCl, LiCl, KCl powder, be made brazing flux
It matches and is：ZnF23.0%th, ZnCl28.5%th, NaF5.0%, LiF2.0%, NaCl12%, LiCl35%, KCl34.5%'s is mixed
Object is closed, is put into grinding alms bowl and is ground 30min, stir evenly, since chloride easily absorbs water, dried in 60 DEG C
15min, i.e., with i.e. use.
According to GB1136-89《It is brazed spreadability and clearance fillability test method》Solder spreadability test is carried out, rare earth magnesium is closed
Golden specimen size is 40mm × 40mm × 3mm, and section to be sprawled is 40mm × 40mm, and section to be welded is cleared up, and removes table
Impurity, greasy dirt and the oxidation film in face are ground smooth and with certain coarse using W28~W3.5 abrasive paper for metallograph
Degree, magnesium-rare earth coupon and solder are placed in acetone together, using ultrasonic cleaning 10min, and carry out drying and processing
For use；Solder for the consistent 1g of shape magnesium-based brazing filler metal (10%Zn, 8.5%Al, 4.5%Ni, 2.0%Ag, 1.4%Ti,
1.5%Cu, 0.8%Mn, 71.3%Mg)；It carries out sprawling experiment in the chamber type electric resistance furnace for being ± 5 DEG C in precision, brazing temperature is
450 DEG C, soaking time 15min is cooled to room temperature.
As a result：Magnesium-rare earth sprawls sample interface and forms fine and close combination, spreading area 96.76mm2。
Embodiment 3：
The ZnF of high-purity is weighed by mass percentage2、ZnCl2, NaF, LiF, NaCl, LiCl, KCl powder, be made brazing flux
It matches as ZnF24.0%th, ZnCl28.0%th, the mixing of NaF6.0%, LiF1.0%, NaCl14%, LiCl30%, KCl37%
Object is put into grinding alms bowl and is ground 20min, stirs evenly, since chloride easily absorbs water, dried in 50 DEG C
20min, i.e., with i.e. use.
According to GB1136-89《It is brazed spreadability and clearance fillability test method》Solder spreadability test is carried out, rare earth magnesium is closed
Golden specimen size is 40mm × 40mm × 3mm, and section to be sprawled is 40mm × 40mm, and section to be welded is cleared up, and removes table
Impurity, greasy dirt and the oxidation film in face are ground smooth and with certain coarse using W28~W3.5 abrasive paper for metallograph
Degree, magnesium-rare earth coupon and solder are placed in acetone together, using ultrasonic cleaning 10min, and carry out drying and processing
For use；Solder for the consistent 1g of shape magnesium-based brazing filler metal (10%Zn, 8.5%Al, 4.5%Ni, 2.0%Ag, 1.4%Ti,
1.5%Cu, 0.8%Mn, 71.3%Mg)；It carries out sprawling experiment in the chamber type electric resistance furnace for being ± 5 DEG C in precision, brazing temperature is
450 DEG C, soaking time 15min is cooled to room temperature.
As a result：Magnesium-rare earth sprawls sample interface and forms fine and close combination, spreading area 93.26mm2。
Embodiment 4：
The ZnF of high-purity is weighed by mass percentage2、ZnCl2, NaF, LiF, NaCl, LiCl, KCl powder, be made brazing flux
It matches and is：ZnF21.0%th, ZnCl26.5%th, NaF6.5%, LiF4.0%, NaCl8.5%, LiCl45%, KCl28.5%'s is mixed
Object is closed, is put into grinding alms bowl and is ground 25min, stir evenly, since chloride easily absorbs water, dried in 55 DEG C
18min, i.e., with i.e. use.
According to GB1136-89《It is brazed spreadability and clearance fillability test method》Solder spreadability test is carried out, rare earth magnesium is closed
Golden specimen size is 40mm × 40mm × 3mm, and section to be sprawled is 40mm × 40mm, and section to be welded is cleared up, and removes table
Impurity, greasy dirt and the oxidation film in face are ground smooth and with certain coarse using W28~W3.5 abrasive paper for metallograph
Degree, magnesium-rare earth coupon and solder are placed in acetone together, using ultrasonic cleaning 10min, and carry out drying and processing
For use；Solder for the consistent 1g of shape magnesium-based brazing filler metal (10%Zn, 8.5%Al, 4.5%Ni, 2.0%Ag, 1.4%Ti,
1.5%Cu, 0.8%Mn, 71.3%Mg)；It carries out sprawling experiment in the chamber type electric resistance furnace for being ± 5 DEG C in precision, brazing temperature is
425 DEG C, soaking time 18min is cooled to room temperature.
As a result：Magnesium-rare earth sprawls sample interface and forms fine and close combination, spreading area 95.18mm2。
Embodiment 5：
The ZnF of high-purity is weighed by mass percentage2、ZnCl2, NaF, LiF, NaCl, LiCl, KCl powder, be made brazing flux
It matches as ZnF25.0%th, ZnCl27.0%th, the mixing of NaF6.0%, LiF3.0%, NaCl15%, LiCl25%, KCl39%
Object is put into grinding alms bowl and is ground 30min, stirs evenly, since chloride easily absorbs water, dried in 60 DEG C
20min, i.e., with i.e. use.
According to GB1136-89《It is brazed spreadability and clearance fillability test method》Solder spreadability test is carried out, rare earth magnesium is closed
Golden specimen size is 40mm × 40mm × 3mm, and section to be sprawled is 40mm × 40mm, and section to be welded is cleared up, and removes table
Impurity, greasy dirt and the oxidation film in face are ground smooth and with certain coarse using W28~W3.5 abrasive paper for metallograph
Degree, magnesium-rare earth coupon and solder are placed in acetone together, using ultrasonic cleaning 10min, and carry out drying and processing
For use；Solder for the consistent 1g of shape magnesium-based brazing filler metal (10%Zn, 8.5%Al, 4.5%Ni, 2.0%Ag, 1.4%Ti,
1.5%Cu, 0.8%Mn, 71.3%Mg)；It carries out sprawling experiment in the chamber type electric resistance furnace for being ± 5 DEG C in precision, brazing temperature is
475 DEG C, soaking time 20min is cooled to room temperature.
As a result：Magnesium-rare earth sprawls sample interface and forms fine and close combination, spreading area 93.22mm2。
Embodiment 6：
The ZnF of high-purity is weighed by mass percentage2、ZnCl2, NaF, LiF, KCl powder, be made brazing flux proportioning is
ZnF25.0%th, ZnCl27.0%th, the mixture of NaF6.0%, LiF3.0%, KCl79% is put into grinding alms bowl and is ground
30min is stirred evenly, and since chloride easily absorbs water, drying 20min is carried out in 60 DEG C, i.e., with i.e. use.
According to GB1136-89《It is brazed spreadability and clearance fillability test method》Solder spreadability test is carried out, rare earth magnesium is closed
Golden specimen size is 40mm × 40mm × 3mm, and section to be sprawled is 40mm × 40mm, and section to be welded is cleared up, and removes table
Impurity, greasy dirt and the oxidation film in face are ground smooth and with certain coarse using W28~W3.5 abrasive paper for metallograph
Degree, magnesium-rare earth coupon and solder are placed in acetone together, using ultrasonic cleaning 10min, and carry out drying and processing
For use；Solder for the consistent 1g of shape magnesium-based brazing filler metal (10%Zn, 8.5%Al, 4.5%Ni, 2.0%Ag, 1.4%Ti,
1.5%Cu, 0.8%Mn, 71.3%Mg)；It carries out sprawling experiment in the chamber type electric resistance furnace for being ± 5 DEG C in precision, brazing temperature is
525 DEG C, soaking time 20min is cooled to room temperature.
As a result：Magnesium-rare earth sprawls sample interface and does not form fine and close combination, spreading area 23.24mm2。
Embodiment 7：
The ZnF of high-purity is weighed by mass percentage2、ZnCl2, NaF, LiF, KCl powder, be made brazing flux proportioning is
ZnF25.0%th, ZnCl27.0%th, the mixture of NaCl15%, LiCl25%, KCl48% is put into grinding alms bowl and is ground
30min is stirred evenly, and since chloride easily absorbs water, drying 20min is carried out in 60 DEG C, i.e., with i.e. use.
According to GB1136-89《It is brazed spreadability and clearance fillability test method》Solder spreadability test is carried out, rare earth magnesium is closed
Golden specimen size is 40mm × 40mm × 3mm, and section to be sprawled is 40mm × 40mm, and section to be welded is cleared up, and removes table
Impurity, greasy dirt and the oxidation film in face are ground smooth and with certain coarse using W28~W3.5 abrasive paper for metallograph
Degree, magnesium-rare earth coupon and solder are placed in acetone together, using ultrasonic cleaning 10min, and carry out drying and processing
For use；Solder for the consistent 1g of shape magnesium-based brazing filler metal (10%Zn, 8.5%Al, 4.5%Ni, 2.0%Ag, 1.4%Ti,
1.5%Cu, 0.8%Mn, 71.3%Mg)；It carries out sprawling experiment in the chamber type electric resistance furnace for being ± 5 DEG C in precision, brazing temperature is
400 DEG C, soaking time 20min is cooled to room temperature.
As a result：Magnesium-rare earth sprawls sample interface and does not form fine and close combination, spreading area 20.22mm2。
Embodiment 8：
The ZnF of high-purity is weighed by mass percentage2、ZnCl2, NaF, LiF, KCl powder, be made brazing flux proportioning be,
ZnCl29.0%th, the mixture of NaF6.5%, NaCl10%, LiCl40%, KCl34.5% is put into grinding alms bowl and is ground
30min is stirred evenly, and since chloride easily absorbs water, drying 20min is carried out in 60 DEG C, i.e., with i.e. use.
According to GB1136-89《It is brazed spreadability and clearance fillability test method》Solder spreadability test is carried out, rare earth magnesium is closed
Golden specimen size is 40mm × 40mm × 3mm, and section to be sprawled is 40mm × 40mm, and section to be welded is cleared up, and removes table
Impurity, greasy dirt and the oxidation film in face are ground smooth and with certain coarse using W28~W3.5 abrasive paper for metallograph
Degree, magnesium-rare earth coupon and solder are placed in acetone together, using ultrasonic cleaning 10min, and carry out drying and processing
For use；Solder for the consistent 1g of shape magnesium-based brazing filler metal (10%Zn, 8.5%Al, 4.5%Ni, 2.0%Ag, 1.4%Ti,
1.5%Cu, 0.8%Mn, 71.3%Mg)；It carries out sprawling experiment in the chamber type electric resistance furnace for being ± 5 DEG C in precision, brazing temperature is
525 DEG C, soaking time 20min is cooled to room temperature.
As a result：Magnesium-rare earth sprawls sample interface and does not form fine and close combination, spreading area 19.29mm2。
According to the result of the test of embodiment 1 to 8, LiCl, NaCl and KCl three can just so that the chemistry of brazing flux is steady together
It is qualitative good, LiF, NaF and ZnF three one work striping effect and wetting and spreading base material it is more preferable.
The above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (6)
1. a kind of brazing flux for being used to be brazed magnesium-rare earth, it is characterised in that：The elemental composition of the brazing flux by weight percentage
Including：ZnF21.0-5.0%, ZnCl26.5%-9.0%, NaF4.0%-6.5%, LiF1.0%-4.0%, NaCl8.5%-
15%th, LiCl25%-45% and surplus are KCl.
2. the brazing flux according to claim 1 for being used to be brazed magnesium-rare earth, it is characterised in that：The brazing flux is with weight percent
Elemental composition than meter includes：ZnF22.0-4.0%, ZnCl28.0%-9.0%, NaF4.0%-6.0%, LiF1.0%-
3.0%, NaCl10%-14%, LiCl30%-40%, surplus KCl.
3. the brazing flux according to claim 2 for being used to be brazed magnesium-rare earth, it is characterised in that：The brazing flux each group sub-prime
It is as follows to measure degree：ZnF23.0%, ZnCl28.5%, NaF5.0%, LiF2.0%, NaCl12%, LiCl35%, surplus
For KCl.
4. the brazing flux according to any one of claims 1 to 3 for being used to be brazed magnesium-rare earth, it is characterised in that：Brazing flux is each
Component is dried powder.
5. the brazing flux according to claim 1 for being used to be brazed magnesium-rare earth, it is characterised in that：The soldering temperature of the brazing flux
Spend is 425 DEG C -475 DEG C.
It is 6. a kind of such as the preparation method of the brazing flux described in any one of claim 1 to 5 for being used to be brazed magnesium-rare earth, feature
It is：Each component is ground into 20-30min, is stirred evenly, and dries 15-20min in 50-60 DEG C and is made.
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| CN112621020B (en) * | 2020-12-25 | 2022-06-21 | 中机智能装备创新研究院(宁波)有限公司 | Nickel-based flux-cored brazing filler metal, preparation method and application |
| CN114260613B (en) * | 2021-11-12 | 2023-07-07 | 浙江新锐焊接科技股份有限公司 | Brazing flux for brazing aluminum and aluminum alloy and preparation method thereof |
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| CN103551763A (en) * | 2013-11-25 | 2014-02-05 | 沈阳航天新光集团有限公司 | Brazing flux for welding LD2 aluminum alloy and preparation method of brazing flux |
| CN103612029A (en) * | 2013-10-25 | 2014-03-05 | 天津大学 | Intermediate-temperature aluminum brazing flux for brazing of high-magnesium aluminum alloy and preparation method |
| CN104551355A (en) * | 2015-01-08 | 2015-04-29 | 山东大学 | Soldering flux filled type pulse welding method for magnesium alloy pipe fitting |
| CN104889605A (en) * | 2015-06-18 | 2015-09-09 | 山东大学 | Brazing flux for brazing magnesium and magnesium alloy and application thereof |
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- 2016-06-14 CN CN201610422965.9A patent/CN106001999B/en active Active
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|---|---|---|---|---|
| JPS63207493A (en) * | 1987-02-24 | 1988-08-26 | Kobe Steel Ltd | Flux for al brazing filler metal |
| JPS63207494A (en) * | 1987-02-24 | 1988-08-26 | Kobe Steel Ltd | Flux for zn brazing filler metal |
| CN101407003A (en) * | 2008-12-02 | 2009-04-15 | 中国电子科技集团公司第十四研究所 | Brazing flux formula suitable for magnesium-containing aluminum alloy medium-temperature brazing |
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| CN104551355A (en) * | 2015-01-08 | 2015-04-29 | 山东大学 | Soldering flux filled type pulse welding method for magnesium alloy pipe fitting |
| CN104889605A (en) * | 2015-06-18 | 2015-09-09 | 山东大学 | Brazing flux for brazing magnesium and magnesium alloy and application thereof |
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| CN106001999A (en) | 2016-10-12 |
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