CN105252166A - Soft brazing filler metal for low-temperature magnesium alloy braze welding - Google Patents
Soft brazing filler metal for low-temperature magnesium alloy braze welding Download PDFInfo
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- CN105252166A CN105252166A CN201510865796.1A CN201510865796A CN105252166A CN 105252166 A CN105252166 A CN 105252166A CN 201510865796 A CN201510865796 A CN 201510865796A CN 105252166 A CN105252166 A CN 105252166A
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- CN
- China
- Prior art keywords
- magnesium alloy
- solder
- brazing
- filler metal
- brazing filler
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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
- 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
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
The invention discloses soft brazing filler metal for low-temperature magnesium alloy braze welding, and relates to the field of magnesium alloy welding and connection. The soft brazing filler metal is prepared from, by mass, 25-31% of Cd, 1-3% of Mg, 19-23% of Zn and the balance Sn. The soft brazing filler metal has excellent performance of welding a magnesium alloy seal part and a structure part in a brazed mode and is high in seal quality, the braze welding interface connecting position is smooth and attractive in appearance, the seal part is low in leakage rate, and it is found through nondestructive testing that the braze welding product has the advantages of few braze seam defects, high sealing performance, high corrosion resistance, long service life, stable performance and the like.
Description
Technical field
The present invention relates to magnesium alloy welding and connection area, relate to a kind of low temperature magnesium alloy brazing soft solder specifically.
Background technology
Magnesium alloy is a kind of metal the lightest in metal current structural material, and it has density, and little (density of magnesium is 1.738 gram per centimeters
3, its density is approximately 2/3 of aluminium, 1/4 of steel, 1/3 of titanium), high, damping good, the advantage such as electromagnetic wave shielding is good, electrical and thermal conductivity is good, processability is good, hot-forming property is good, easy recovery of specific strength and enjoy favor.In automobile, electronics, electrical equipment, traffic, space flight, aviation, national defence and war industry field, there is extremely important using value and wide application prospect, be described as " green engineering material " of 21st century.[adopt the solder lower than mother metal melting temperature when soldering is industrially defined as welding, operating temperature during welding adopts lower than mother metal solidus temperature higher than a kind of solder technology of solder liquidus temperature.During soldering, solder is liquid by heat fused, and mother metal still remains solid-state, liquid solder in the gap of mother metal or on the surface wetting, capillary flow, fill, sprawl, form firmly joint after interact with mother metal (dissolve, spread or produce intermetallic compound), cooled and solidified, thus mother metal to be linked together.Due to historical reasons, soldering is divided into solder brazing and solder always.American Welding Society (AWS) (AWS) regulation solder liquidus temperature is solder brazing higher than 450 ° of solderings that C carries out, be solder lower than 450 ° of solderings that C carries out, solder mainly relies on solder to be formed welding point by after heat fused to the wetting of mother metal, liquidus temperature is hard solder higher than the solder of 450 ° of C, and liquidus temperature is soft solder lower than the solder of 450 ° of C].Because magnesium-alloy material has started to widely apply in industry and the product for civilian use, when wherein the magnesium alloy brazing of the higher structural material of desired strength being connected, need solder brazing magnesium alloy brazing filler metal, magnesium alloy hard solder has had several kinds few in number at present, and test material association of the BMg-1(U.S. trade mark of the such as U.S. is AZ92A), BMg-2a (test material association of the U.S. trade mark is AZ125A).The magnesium alloy brazing filler metal MC3(composition of Japan is in close proximity to the BMg-1 of the U.S.), In-Mg-Zn-Al(brazing filler metal melts temperature range is between 449 ~ 490 DEG C), In-Mg(brazing filler metal melts temperature range 473 ~ 484 DEG C), Mg-Sn-In-Al(brazing filler metal melts temperature range is between 457 ~ 500 DEG C).The Mg-Zn-Nd magnesium alloy brazing filler metal (brazing filler metal melts temperature range is between 333 ~ 356 DEG C) of China, Al-Mg-Zn magnesium alloy brazing filler metal (brazing filler metal melts temperature range is between 439 ~ 468 DEG C) etc.But for the magnesium alloy workpiece brazing that requirement of strength is not high, as played the magnesium-alloy material of sealing function, connection function, as container, electronic product, instrument component etc., but seldom about the report of magnesium alloy soft solder, for several few external magnesium alloy soft solder formula for a product is also be in highly confidential state, commercial market is also difficult to the Related product seeing magnesium alloy soft solder.So in order to the kind of expanding magnesium alloy brazing filler metal and the scope of application expanding magnesium-alloy material, design and to research and develop brazing temperature low, good seal performance, the magnesium alloy soft solder of the high-quality that corrosion resistance is strong just becomes the key of this difficult problem of solution.
Summary of the invention
Object of the present invention is custom-designed a kind of magnesium alloy brazing soft solder with lower brazing temperature for the weak point existed in above-mentioned magnesium alloy practical application just.Soft solder of the present invention has the premium properties of soldering magnesium alloy seal and structural member, and airtight quality is high, soldering interface junction smooth outer surface, attractive in appearance, seal leakage rate is low, find that brazing product has that brazed seam defect is few, sealing property is high, decay resistance is strong, long service life, steady performance through Non-Destructive Testing test.
Object of the present invention realizes by following technique measures:
Low temperature magnesium alloy brazing soft solder of the present invention is prepared from by the raw material of following mass percent, and wherein: Cd:25 ~ 31 ﹪, Mg:1 ~ 3 ﹪, Zn:19 ~ 23 ﹪, surplus is Sn.
The fusion temperature scope of soft solder of the present invention is 182 ~ 276 DEG C, and brazing temperature range is 320 ~ 370 DEG C.
More specifically, the chemical composition composition of four kinds of elements is had for the low temperature magnesium alloy brazing soft solder in the present invention, wherein the Main Function of Mg element is conducive to mother metal and solder to form metal solid solution tissue at linkage interface, linkage interface combined firm.Add the plasticity that a small amount of Sn can make the fusion temperature of solder reduce, can improve solder itself simultaneously, reduce the tearing tendency that solder adds man-hour.Zn element in solder plays solution strengthening effect, plays the effect improving solder self-strength, and the Cd element in solder plays the ageing strengthening effect of brazed seam after brazing and improves the corrosion resistance effect of brazed seam.
Sn-Mg-Zn-Cd magnesium alloy brazing soft solder provided by the present invention can adopt the flux protection method in this technical field known technology or inert gas shielding method to carry out the melting of brazing filler metal alloy, and solder uses after can adopting bulk, bar-shaped, granular, sheet, the form processing such as thread, irregularly shaped.Wherein solder can adopt the methods such as machining process, hot investment casting, extruding, drawing, rolling, punching press, Linear cut to obtain after melting.
Beneficial effect of the present invention is as follows:
The fusion temperature scope of Sn-Mg-Zn-Cd magnesium alloy brazing soft solder provided by the present invention is 182 ~ 276 DEG C, and brazing temperature range is 320 ~ 370 DEG C; Under this brazing temperature, solder has good spreadability and gap filling to magnesium alloy mother metal, is applicable to the solder of various magnesium alloy.Especially induction brazing, gas brazing and the magnesium alloy mother metal such as resistance brazing technology brazing AZ61M, ME20M, AZ31B is adopted, due to relatively low by temperature during the soldering of Sn-Mg-Zn-Cd soft solder, adopt the phenomenons such as the oxidation effectively can avoiding the magnesium alloy substrate materials such as AZ61M, ME20M, AZ31B during above-mentioned soldering processes, softening and burning, through testing machine for mechanical properties test soldering lap joint shearing strength between 11 ~ 16MPa, soldering banjo fixing butt jointing tensile strength is between 13 ~ 19MPa.
Detailed description of the invention
The present invention is described further below with reference to embodiment:
Embodiment 1:
A, to get by the chemical composition of soft solder and mass percent thereof: Cd:25 ﹪, Mg:2.5 ﹪, Zn:20.2 ﹪, surplus is Sn.
B, employing flux protection method carry out the melting of solder alloy, first alloy are poured into ingot casting, then adopt mechanical dissection method that brazing filler metal alloy is processed into rectangular bulk.When adopting soft solder of the present invention to carry out soldering to ME20M magnesium alloy plate, before brazing sand papering is carried out to ME20M magnesium alloy plate sample, surface contaminants is removed in acetone cleaning.Magnesium alloy plate is put into argon protective device after being fixed by fixture and is carried out high-frequency induction brazing.In brazing process, argon flow amount is 0.3L/min, and programming rate is 220 DEG C/min, and brazing temperature range is 320 ~ 370 DEG C, after insulation 180s, is cooled to room temperature.After soldering, joint appearance is shaped good, measures soldered fitting shearing strength and tensile strength.
Embodiment 2:
A, to get by the chemical composition of soft solder and mass percent thereof: Cd:30.8 ﹪, Mg:1.5 ﹪, Zn:19.8 ﹪, surplus is Sn.
B, employing flux protection method carry out the melting of solder alloy, alloy is poured into ingot casting, then adopts extruder that brazing filler metal alloy is squeezed into strip.Adopt soft solder of the present invention to carry out sand papering, acetone cleaning removal surface contaminants to AZ61M magnesium alloy hermetically sealed can faying face place, solder is placed on faying face, and solder is placed in brazing place and carries out resistance brazing.Programming rate is 260 DEG C/min, and brazing temperature range is 320 ~ 370 DEG C, after insulation 120s, is cooled to room temperature.After soldering, joint appearance is shaped good, measures soldered fitting shearing strength and tensile strength.
Embodiment 3:
A, to get by magnesium alloy soft solder chemical composition and mass percent thereof: Cd:29.4 ﹪, Mg:2.3 ﹪, Zn:21.3 ﹪, surplus is Sn.
B, employing flux protection method carry out the melting of solder alloy, pour into ingot casting, then adopt milling train that soft solder is rolled into rectangular sheet.When adopting soft solder of the present invention to carry out soldering to AZ31B magnesium alloy joint, carry out sand papering to AZ31B magnesium alloy sample before brazing, surface contaminants is removed in acetone cleaning, soft solder is placed in joint and carries out gas brazing.Brazing temperature range is 320 ~ 370 DEG C, after insulation 80s, is cooled to room temperature.After soldering, joint appearance is shaped good, measures soldered fitting shearing strength and tensile strength.
Claims (2)
1. a low temperature magnesium alloy brazing soft solder, is characterized in that: it is prepared from by the raw material of following mass percent, and wherein: Cd:25 ~ 31 ﹪, Mg:1 ~ 3 ﹪, Zn:19 ~ 23 ﹪, surplus is Sn.
2. low temperature magnesium alloy brazing soft solder according to claim 1, is characterized in that: the fusion temperature scope of described soft solder is 182 ~ 276 DEG C, and brazing temperature range is 320 ~ 370 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510865796.1A CN105252166A (en) | 2015-12-01 | 2015-12-01 | Soft brazing filler metal for low-temperature magnesium alloy braze welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510865796.1A CN105252166A (en) | 2015-12-01 | 2015-12-01 | Soft brazing filler metal for low-temperature magnesium alloy braze welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105252166A true CN105252166A (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510865796.1A Pending CN105252166A (en) | 2015-12-01 | 2015-12-01 | Soft brazing filler metal for low-temperature magnesium alloy braze welding |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105618954A (en) * | 2016-03-15 | 2016-06-01 | 力创(台山)电子科技有限公司 | Welding flux for welding in electro-hydraulic servo valve assembly technology |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB747813A (en) * | 1951-06-11 | 1956-04-18 | Sheffield Smelting Company Ltd | Improvements relating to the soldering of aluminium and aluminium alloys |
| US4106930A (en) * | 1972-02-19 | 1978-08-15 | Asahi Glass Company, Ltd. | Solder alloys for soldering difficultly solderable material |
| JPS5594455A (en) * | 1979-09-03 | 1980-07-17 | Nippon Cable Syst Inc | Solder alloy |
| JPH02197396A (en) * | 1989-01-24 | 1990-08-03 | Mitsubishi Cable Ind Ltd | Method for repairing weld defect part of welded aluminum pipe |
| CN1094666A (en) * | 1994-01-26 | 1994-11-09 | 林凡 | Rare-earth welding material for different metals and manufacture method thereof |
| CN101125396A (en) * | 2006-08-17 | 2008-02-20 | 黄柏山 | Tin paste and its use in thermal press welding method |
-
2015
- 2015-12-01 CN CN201510865796.1A patent/CN105252166A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB747813A (en) * | 1951-06-11 | 1956-04-18 | Sheffield Smelting Company Ltd | Improvements relating to the soldering of aluminium and aluminium alloys |
| US4106930A (en) * | 1972-02-19 | 1978-08-15 | Asahi Glass Company, Ltd. | Solder alloys for soldering difficultly solderable material |
| JPS5594455A (en) * | 1979-09-03 | 1980-07-17 | Nippon Cable Syst Inc | Solder alloy |
| JPH02197396A (en) * | 1989-01-24 | 1990-08-03 | Mitsubishi Cable Ind Ltd | Method for repairing weld defect part of welded aluminum pipe |
| CN1094666A (en) * | 1994-01-26 | 1994-11-09 | 林凡 | Rare-earth welding material for different metals and manufacture method thereof |
| CN101125396A (en) * | 2006-08-17 | 2008-02-20 | 黄柏山 | Tin paste and its use in thermal press welding method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105618954A (en) * | 2016-03-15 | 2016-06-01 | 力创(台山)电子科技有限公司 | Welding flux for welding in electro-hydraulic servo valve assembly technology |
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Application publication date: 20160120 |