CN106238951A - A kind of environment-friendly high-intensity lead-free brazing and preparation technology thereof - Google Patents
A kind of environment-friendly high-intensity lead-free brazing and preparation technology thereof Download PDFInfo
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- CN106238951A CN106238951A CN201610736062.8A CN201610736062A CN106238951A CN 106238951 A CN106238951 A CN 106238951A CN 201610736062 A CN201610736062 A CN 201610736062A CN 106238951 A CN106238951 A CN 106238951A
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- free brazing
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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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
Abstract
The invention discloses a kind of environment-friendly high-intensity lead-free brazing and preparation technology thereof, the chemical composition of described solder is: magnesium, calcium, silicon, fluorine, gold, copper, ytterbium, indium, praseodymium, europium, bismuth, zinc, carbon, scandium, rhodium, nickel, and surplus is stannum.It is 732.5 ~ 812.5MPa that the tensile strength of the welding point of the solder prepared by the present invention is higher than；The shear strength of soldering rear substrate is 274.8 ~ 316.7MPa；In addition the compactness by the interface cohesion of metallographic observation weld is good.Therefore, prepared solder welding effect is good, excellent mechanical after welding, and good stability, simultaneously unleaded in component, the feature of environmental protection is good, has a good application prospect.
Description
Technical field
The invention belongs to technical field of electronic materials, be specifically related to a kind of environment-friendly high-intensity lead-free brazing and preparation work thereof
Skill.
Background technology
Along with the fast development of electronics industry, electronic product progressively develops towards the direction of miniaturization, high integration, the most right
Electronic Packaging proposes more stringent requirement.In Electronic Packaging, soldering is to apply one of most method of attachment.Soldering institute
Solder develop from solder containing leads such as traditional SnPb towards the direction of lead-free brazing, thus lead-free brazing becomes grinding of industry
Study carefully focus.But, compared with solder containing lead, current lead-free brazing exist fusing point generally the highest, anti-fatigue performance is poor, moistening
Property difference etc. deficiency, cause the mechanical strength of lead-free brazing and reliability the most relatively low, it is impossible to meet more preferable application demand.
Therefore, the high lead-free brazing of a kind of novel fire resistant, reliability height and mechanical strength is developed for electron trade
There is good using value.
Summary of the invention
To this end, the present invention provides a kind of environment-friendly high-intensity lead-free brazing and preparation technology thereof, solve more than in prior art
At least one is not enough.
To this end, the present invention provides a kind of environment-friendly high-intensity lead-free brazing, the chemical composition of described solder is with percentage by weight
It is calculated as: magnesium 3.8 ~ 7.1%, calcium 1.8 ~ 3.6%, silicon 2.3 ~ 4.2%, fluorine 1.1 ~ 3.4%, gold 0.4 ~ 1.1%, copper 6.2 ~ 8.7%, ytterbium 0.7 ~
2.5%, indium 1.5 ~ 3%, praseodymium 0.3 ~ 0.9%, europium 0.8 ~ 2.9%, bismuth 4 ~ 6.3%, zinc 2.1 ~ 4%, carbon 0.5 ~ 3%, scandium 2.8 ~ 5.4%, rhodium
0.7 ~ 2%, nickel 4 ~ 6.8%, surplus is stannum.
According to an embodiment of the invention, wherein, the chemical composition of described solder is by weight percentage: magnesium
4.5 ~ 6.8%, calcium 1.9 ~ 3.4%, silicon 2.5 ~ 4%, fluorine 1.4 ~ 3.2%, gold 0.4 ~ 0.9%, copper 6.5 ~ 8.4%, ytterbium 0.8 ~ 2%, indium 1.8 ~
2.4%, praseodymium 0.4 ~ 0.7%, europium 1.3 ~ 2.6%, bismuth 4.8 ~ 6%, zinc 2.2 ~ 3.7%, carbon 0.6 ~ 2.7%, scandium 3.1 ~ 5%, rhodium 0.9 ~
1.5%, nickel 4.5 ~ 6.2%, surplus is stannum.
To this end, the present invention provides the preparation technology of environment-friendly high-intensity lead-free brazing, comprise the following steps:
(1) weigh each raw material according to above-mentioned percentage by weight；
(2) putting in vacuum melting furnace by raw material gold, fluorine, zinc and europium, evacuation is also filled with pure argon, 900 ~ 1100 DEG C melt
Melting 40 ~ 120min under refining temperature conditions, naturally cools to room temperature and obtains intermediate alloy I；
(3) putting in arc-melting furnace by raw copper, nickel, silicon and bismuth, evacuation is also filled with pure argon, reaches 280 ~ 350A at electric current
Under the conditions of melting 60 ~ 150min, naturally cool to room temperature and obtain intermediate alloy II；
(3) raw material magnesium, calcium, carbon and stannum are put in heating furnace, be first warming up to 750 ~ 900 DEG C, after material melting, add raw material
Ytterbium, indium, praseodymium, scandium, rhodium, above-mentioned intermediate alloy I and above-mentioned intermediate alloy II, then it is warming up to 1200 ~ 1450 DEG C, treat that material all melts
After change, it is cooled to 950 ~ 1100 DEG C and is incubated 10 ~ 30min, then remove slag and be cast into ingot casting；
(4) in argon gas atmosphere, first ingot casting is carried out homogenizing anneal process, be squeezed under the conditions of 400 ~ 550 DEG C
Silk, last machine-shaping, obtain required environment-friendly high-intensity lead-free brazing.
According to an embodiment of the invention, wherein, in step (2), melting under the conditions of the smelting temperature of 960 DEG C
70min。
According to an embodiment of the invention, wherein, in step (3), melting under the conditions of electric current reaches 320A
80min。
According to an embodiment of the invention, wherein, in step (4), it is warming up to 820 DEG C, after material melting, adds
Enter raw material ytterbium, indium, praseodymium, scandium, rhodium, above-mentioned intermediate alloy I and above-mentioned intermediate alloy II, then be warming up to 1430 DEG C, treat that material is whole
After fusing, it is cooled to 1050 DEG C and is incubated 15min.
According to an embodiment of the invention, wherein, in step (5), described homogenizing anneal condition is: warp successively
The excess temperature time is respectively 420 ~ 480 DEG C × 24h, 500 ~ 550 DEG C × 24h, 600 ~ 680 DEG C × 24h, 720 ~ 800 DEG C × 24h and
Five annealing of 830 ~ 880 DEG C × 12h.
The invention have the benefit that
Solder prepared by the present invention carries out soldering on base material, the tensile strength of its welding point higher than be 732.5 ~
812.5MPa；The shear strength of soldering rear substrate is 274.8 ~ 316.7MPa；In addition tied by the interface of metallographic observation weld
The compactness closed is good.Therefore, prepared solder welding effect is good, excellent mechanical after welding, good stability, simultaneously
In component unleaded, the feature of environmental protection is good, has a good application prospect.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail.Following example are used for illustrating the present invention, but not
It is used for limiting the scope of the present invention.
Embodiment 1
The preparation technology of environment-friendly high-intensity lead-free brazing, comprises the following steps:
(1) weigh each raw material according to percentage by weight: magnesium 3.8%, calcium 1.8%, silicon 2.3%, fluorine 1.1%, gold 0.4%, copper 6.2%, ytterbium
0.7%, indium 1.5%, praseodymium 0.3%, europium 0.8%, bismuth 4%, zinc 2.1%, carbon 0.5%, scandium 2.8%, rhodium 0.7%, nickel 4%, surplus is stannum；
(2) putting in vacuum melting furnace by raw material gold, fluorine, zinc and europium, evacuation is also filled with pure argon, the melting temperature of 900 DEG C
Melting 40min under the conditions of degree, naturally cools to room temperature and obtains intermediate alloy I；
(3) putting in arc-melting furnace by raw copper, nickel, silicon and bismuth, evacuation is also filled with pure argon, reaches 280A condition at electric current
Lower melting 60min, naturally cools to room temperature and obtains intermediate alloy II；
(3) raw material magnesium, calcium, carbon and stannum are put in heating furnace, be first warming up to 750 DEG C, after material melting, addition raw material ytterbium,
Indium, praseodymium, scandium, rhodium, above-mentioned intermediate alloy I and above-mentioned intermediate alloy II, then it is warming up to 1200 DEG C, after material all melts, cold
But to 950 DEG C and be incubated 10min, then remove slag and be cast into ingot casting；
(4) in argon gas atmosphere, ingot casting first carrying out homogenizing anneal process, described homogenizing anneal condition is: sequentially pass through
Temperature-time is respectively 420 DEG C × 24h, 500 DEG C × 24h, 600 DEG C × 24h, moves back for five times of 720 DEG C × 24h and 830 DEG C × 12h
Fire, carries out extruding filamentation, last machine-shaping under the conditions of 400 ~ 550 DEG C, obtains required environment-friendly high-intensity lead-free brazing.
Test result: prepared solder carries out on base material soldering, and the tensile strength of its welding point is
732.5MPa；The shear strength of soldering rear substrate is 274.8MPa；In addition by the cause of the interface cohesion of metallographic observation weld
Close property is good.Therefore, prepared solder welding effect is good, excellent mechanical after welding, and good stability, simultaneously in component
Unleaded, the feature of environmental protection is good, has a good application prospect.
Embodiment 2
The preparation technology of environment-friendly high-intensity lead-free brazing, comprises the following steps:
(1) weigh each raw material according to percentage by weight: magnesium 7.1%, calcium 3.6%, silicon 4.2%, fluorine 3.4%, gold 1.1%, copper 8.7%, ytterbium
2.5%, indium 3%, praseodymium 0.9%, europium 2.9%, bismuth 6.3%, zinc 4%, carbon 3%, scandium 5.4%, rhodium 2%, nickel 6.8%, surplus is stannum；
(2) putting in vacuum melting furnace by raw material gold, fluorine, zinc and europium, evacuation is also filled with pure argon, the melting temperature of 1100 DEG C
Melting 120min under the conditions of degree, naturally cools to room temperature and obtains intermediate alloy I；
(3) putting in arc-melting furnace by raw copper, nickel, silicon and bismuth, evacuation is also filled with pure argon, reaches 350A condition at electric current
Lower melting 150min, naturally cools to room temperature and obtains intermediate alloy II；
(3) raw material magnesium, calcium, carbon and stannum are put in heating furnace, be first warming up to 900 DEG C, after material melting, addition raw material ytterbium,
Indium, praseodymium, scandium, rhodium, above-mentioned intermediate alloy I and above-mentioned intermediate alloy II, then it is warming up to 1450 DEG C, after material all melts, cold
But to 1100 DEG C and be incubated 30min, then remove slag and be cast into ingot casting；
(4) in argon gas atmosphere, ingot casting first carrying out homogenizing anneal process, described homogenizing anneal condition is: sequentially pass through
Temperature-time is respectively 480 DEG C × 24h, 550 DEG C × 24h, 680 DEG C × 24h, moves back for five times of 800 DEG C × 24h and 880 DEG C × 12h
Fire, carries out extruding filamentation, last machine-shaping under the conditions of 400 ~ 550 DEG C, obtains required environment-friendly high-intensity lead-free brazing.
Test result: prepared solder carries out on base material soldering, and the tensile strength of its welding point is
756.8MPa；The shear strength of soldering rear substrate is 291.5MPa；In addition by the cause of the interface cohesion of metallographic observation weld
Close property is good.Therefore, prepared solder welding effect is good, excellent mechanical after welding, and good stability, simultaneously in component
Unleaded, the feature of environmental protection is good, has a good application prospect.
Embodiment 3
The preparation technology of environment-friendly high-intensity lead-free brazing, comprises the following steps:
(1) weigh each raw material according to percentage by weight: magnesium 4.5%, calcium 1.9%, silicon 2.5%, fluorine 1.4%, gold 0.4%, copper 6.5%, ytterbium
0.8%, indium 1.8%, praseodymium 0.4%, europium 1.3%, bismuth 4.8%, zinc 2.2%, carbon 0.6%, scandium 3.1%, rhodium 0.9%, nickel 4.5%, surplus is stannum；
(2) putting in vacuum melting furnace by raw material gold, fluorine, zinc and europium, evacuation is also filled with pure argon, the melting temperature of 1050 DEG C
Melting 70min under the conditions of degree, naturally cools to room temperature and obtains intermediate alloy I；
(3) putting in arc-melting furnace by raw copper, nickel, silicon and bismuth, evacuation is also filled with pure argon, reaches 320A condition at electric current
Lower melting 100min, naturally cools to room temperature and obtains intermediate alloy II；
(3) raw material magnesium, calcium, carbon and stannum are put in heating furnace, be first warming up to 850 DEG C, after material melting, addition raw material ytterbium,
Indium, praseodymium, scandium, rhodium, above-mentioned intermediate alloy I and above-mentioned intermediate alloy II, then it is warming up to 1350 DEG C, after material all melts, cold
But to 1000 DEG C and be incubated 25min, then remove slag and be cast into ingot casting；
(4) in argon gas atmosphere, ingot casting first carrying out homogenizing anneal process, described homogenizing anneal condition is: sequentially pass through
Temperature-time is respectively 440 DEG C × 24h, 530 DEG C × 24h, 640 DEG C × 24h, moves back for five times of 760 DEG C × 24h and 850 DEG C × 12h
Fire, carries out extruding filamentation, last machine-shaping under the conditions of 400 ~ 550 DEG C, obtains required environment-friendly high-intensity lead-free brazing.
Test result: prepared solder carries out on base material soldering, and the tensile strength of its welding point is
772.4MPa；The shear strength of soldering rear substrate is 304.9MPa；In addition by the cause of the interface cohesion of metallographic observation weld
Close property is good.Therefore, prepared solder welding effect is good, excellent mechanical after welding, and good stability, simultaneously in component
Unleaded, the feature of environmental protection is good, has a good application prospect.
Embodiment 4
The preparation technology of environment-friendly high-intensity lead-free brazing, comprises the following steps:
(1) weigh each raw material according to percentage by weight: magnesium 6.8%, calcium 3.4%, silicon 4%, fluorine 3.2%, gold 0.9%, copper 8.4%, ytterbium 2%,
Indium 2.4%, praseodymium 0.7%, europium ~ 2.6%, bismuth 6%, zinc 3.7%, carbon 2.7%, scandium 5%, rhodium 1.5%, nickel 6.2%, surplus is stannum；
(2) putting in vacuum melting furnace by raw material gold, fluorine, zinc and europium, evacuation is also filled with pure argon, the melting temperature of 950 DEG C
Melting 80min under the conditions of degree, naturally cools to room temperature and obtains intermediate alloy I；
(3) putting in arc-melting furnace by raw copper, nickel, silicon and bismuth, evacuation is also filled with pure argon, reaches 300A condition at electric current
Lower melting 130min, naturally cools to room temperature and obtains intermediate alloy II；
(3) raw material magnesium, calcium, carbon and stannum are put in heating furnace, be first warming up to 850 DEG C, after material melting, addition raw material ytterbium,
Indium, praseodymium, scandium, rhodium, above-mentioned intermediate alloy I and above-mentioned intermediate alloy II, then it is warming up to 1350 DEG C, after material all melts, cold
But to 1080 DEG C and be incubated 25min, then remove slag and be cast into ingot casting；
(4) in argon gas atmosphere, ingot casting first carrying out homogenizing anneal process, described homogenizing anneal condition is: sequentially pass through
Temperature-time is respectively 440 DEG C × 24h, 530 DEG C × 24h, 620 DEG C × 24h, moves back for five times of 780 DEG C × 24h and 860 DEG C × 12h
Fire, carries out extruding filamentation, last machine-shaping under the conditions of 400 ~ 550 DEG C, obtains required environment-friendly high-intensity lead-free brazing.
Test result: prepared solder carries out on base material soldering, and the tensile strength of its welding point is
793.1MPa；The shear strength of soldering rear substrate is 311.6MPa；In addition by the cause of the interface cohesion of metallographic observation weld
Close property is good.Therefore, prepared solder welding effect is good, excellent mechanical after welding, and good stability, simultaneously in component
Unleaded, the feature of environmental protection is good, has a good application prospect.
Embodiment 5
The preparation technology of environment-friendly high-intensity lead-free brazing, comprises the following steps:
(1) weigh each raw material according to percentage by weight: magnesium 5.6%, calcium 2.7%, silicon 3.2%, fluorine 2.3%, gold 0.6%, copper 7.4%, ytterbium
1.4%, indium 2.1%, praseodymium 0.5%, europium 2%, bismuth 5.4%, zinc 2.9%, carbon 1.6%, scandium 4%, rhodium 1.2%, nickel 5.3%, surplus is stannum；
(2) putting in vacuum melting furnace by raw material gold, fluorine, zinc and europium, evacuation is also filled with pure argon, the melting temperature of 950 DEG C
Melting 80min under the conditions of degree, naturally cools to room temperature and obtains intermediate alloy I；
(3) putting in arc-melting furnace by raw copper, nickel, silicon and bismuth, evacuation is also filled with pure argon, reaches 320A condition at electric current
Lower melting 120min, naturally cools to room temperature and obtains intermediate alloy II；
(3) raw material magnesium, calcium, carbon and stannum are put in heating furnace, be first warming up to 800 DEG C, after material melting, addition raw material ytterbium,
Indium, praseodymium, scandium, rhodium, above-mentioned intermediate alloy I and above-mentioned intermediate alloy II, then it is warming up to 1350 DEG C, after material all melts, cold
But to 1050 DEG C and be incubated 25min, then remove slag and be cast into ingot casting；
(4) in argon gas atmosphere, ingot casting first carrying out homogenizing anneal process, described homogenizing anneal condition is: sequentially pass through
Temperature-time is respectively 460 DEG C × 24h, 540 DEG C × 24h, 670 DEG C × 24h, moves back for five times of 750 DEG C × 24h and 860 DEG C × 12h
Fire, carries out extruding filamentation, last machine-shaping under the conditions of 400 ~ 550 DEG C, obtains required environment-friendly high-intensity lead-free brazing.
Test result: prepared solder carries out on base material soldering, and the tensile strength of its welding point is
812.5MPa；The shear strength of soldering rear substrate is 316.7MPa；In addition by the cause of the interface cohesion of metallographic observation weld
Close property is good.Therefore, prepared solder welding effect is good, excellent mechanical after welding, and good stability, simultaneously in component
Unleaded, the feature of environmental protection is good, has a good application prospect.
Comparative example 1
This comparative example the difference is that only with embodiment 1: without europium, fluorine and scandium.This comparative example is with reference to the system of embodiment 1
Standby step prepares lead-free brazing.
Test result: prepared solder carries out on base material soldering, and the tensile strength of its welding point is
703.4MPa；The shear strength of soldering rear substrate is 231.6MPa；In addition by the cause of the interface cohesion of metallographic observation weld
Close property is good.
Comparative example 2
This comparative example the difference is that only with embodiment 1: without bismuth, indium and calcium.This comparative example is with reference to the system of embodiment 1
Standby step prepares lead-free brazing.
Test result: prepared solder carries out on base material soldering, and the tensile strength of its welding point is
716.8MPa；The shear strength of soldering rear substrate is 224.2MPa；In addition by the cause of the interface cohesion of metallographic observation weld
Close property is good.
Claims (7)
1. an environment-friendly high-intensity lead-free brazing, it is characterised in that the chemical composition of described solder is by weight percentage: magnesium
3.8 ~ 7.1%, calcium 1.8 ~ 3.6%, silicon 2.3 ~ 4.2%, fluorine 1.1 ~ 3.4%, gold 0.4 ~ 1.1%, copper 6.2 ~ 8.7%, ytterbium 0.7 ~ 2.5%, indium
1.5 ~ 3%, praseodymium 0.3 ~ 0.9%, europium 0.8 ~ 2.9%, bismuth 4 ~ 6.3%, zinc 2.1 ~ 4%, carbon 0.5 ~ 3%, scandium 2.8 ~ 5.4%, rhodium 0.7 ~ 2%,
Nickel 4 ~ 6.8%, surplus is stannum.
Environment-friendly high-intensity lead-free brazing the most according to claim 1, it is characterised in that the chemical composition of described solder is with weight
Amount percentages be: magnesium 4.5 ~ 6.8%, calcium 1.9 ~ 3.4%, silicon 2.5 ~ 4%, fluorine 1.4 ~ 3.2%, gold 0.4 ~ 0.9%, copper 6.5 ~ 8.4%,
Ytterbium 0.8 ~ 2%, indium 1.8 ~ 2.4%, praseodymium 0.4 ~ 0.7%, europium 1.3 ~ 2.6%, bismuth 4.8 ~ 6%, zinc 2.2 ~ 3.7%, carbon 0.6 ~ 2.7%, scandium
3.1 ~ 5%, rhodium 0.9 ~ 1.5%, nickel 4.5 ~ 6.2%, surplus is stannum.
3. the preparation technology of environment-friendly high-intensity lead-free brazing as claimed in claim 1 or 2, it is characterised in that include following step
Rapid:
(1) weigh each raw material according to above-mentioned percentage by weight；
(2) putting in vacuum melting furnace by raw material gold, fluorine, zinc and europium, evacuation is also filled with pure argon, 900 ~ 1100 DEG C melt
Melting 40 ~ 120min under refining temperature conditions, naturally cools to room temperature and obtains intermediate alloy I；
(3) putting in arc-melting furnace by raw copper, nickel, silicon and bismuth, evacuation is also filled with pure argon, reaches 280 ~ 350A at electric current
Under the conditions of melting 60 ~ 150min, naturally cool to room temperature and obtain intermediate alloy II；
(3) raw material magnesium, calcium, carbon and stannum are put in heating furnace, be first warming up to 750 ~ 900 DEG C, after material melting, add raw material
Ytterbium, indium, praseodymium, scandium, rhodium, above-mentioned intermediate alloy I and above-mentioned intermediate alloy II, then it is warming up to 1200 ~ 1450 DEG C, treat that material all melts
After change, it is cooled to 950 ~ 1100 DEG C and is incubated 10 ~ 30min, then remove slag and be cast into ingot casting；
(4) in argon gas atmosphere, first ingot casting is carried out homogenizing anneal process, be squeezed under the conditions of 400 ~ 550 DEG C
Silk, last machine-shaping, obtain required environment-friendly high-intensity lead-free brazing.
The preparation technology of environment-friendly high-intensity lead-free brazing the most according to claim 3, it is characterised in that in step (2),
Melting 70min under the conditions of the smelting temperature of 960 DEG C.
The preparation technology of environment-friendly high-intensity lead-free brazing the most according to claim 3, it is characterised in that in step (3),
Melting 80min under the conditions of electric current reaches 320A.
The preparation technology of environment-friendly high-intensity lead-free brazing the most according to claim 3, it is characterised in that in step (4),
It is warming up to 820 DEG C, after material melting, adds raw material ytterbium, indium, praseodymium, scandium, rhodium, above-mentioned intermediate alloy I and above-mentioned intermediate alloy
II, then it is warming up to 1430 DEG C, after material all melts, it is cooled to 1050 DEG C and is incubated 15min.
The preparation technology of environment-friendly high-intensity lead-free brazing the most according to claim 3, it is characterised in that in step (5),
Described homogenizing anneal condition is: sequentially passes through temperature-time and is respectively 420 ~ 480 DEG C × 24h, 500 ~ 550 DEG C × 24h, 600 ~
680 DEG C × 24h, five annealing of 720 ~ 800 DEG C × 24h and 830 ~ 880 DEG C × 12h.
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| CN109175573A (en) * | 2018-09-12 | 2019-01-11 | 南昌大学 | A kind of Cu-Ni alloying substrate and the solder joint of lead-free brazing and preparation method thereof |
| CN117773407A (en) * | 2024-02-27 | 2024-03-29 | 江苏银和金属材料有限公司 | High-ductility tin-silver-copper-nickel solder and preparation method thereof |
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| CN101380700A (en) * | 2007-09-05 | 2009-03-11 | 北京康普锡威焊料有限公司 | Tin bismuth cuprum series leadless solder and preparation method thereof |
| WO2014057261A1 (en) * | 2012-10-09 | 2014-04-17 | Alpha Metals, Inc. | Lead-free and antimony-free tin solder reliable at high temperatures |
| CN103889644A (en) * | 2012-10-09 | 2014-06-25 | 阿尔法金属公司 | Lead-free and antimony-free tin solder reliable at high temperatures |
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| WO2016012754A2 (en) * | 2014-07-21 | 2016-01-28 | Alpha Metals, Inc. | Low temperature high reliability alloy for solder hierarchy |
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