CN103240541B - Tin zinc multi-element alloy solder for soldering copper and aluminum and preparation method thereof - Google Patents
Tin zinc multi-element alloy solder for soldering copper and aluminum and preparation method thereof Download PDFInfo
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- CN103240541B CN103240541B CN201310174628.9A CN201310174628A CN103240541B CN 103240541 B CN103240541 B CN 103240541B CN 201310174628 A CN201310174628 A CN 201310174628A CN 103240541 B CN103240541 B CN 103240541B
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Abstract
Tin zinc multi-element alloy solder for soldering copper and aluminum and a preparation method thereof relate to tin zinc multi-element eutectic lead-free solder and the preparation method. The tin zinc multi-element alloy solder comprises, by weight, 3%-7% of Zn, 0.1%-0.5% of Ni, 0.05%-0.2% of Te, 0.01%-0.05% of Nd, 1%-1.5% of tin-based oxidization resistant alloy and the balance Sn. A formula of the tin zinc solder and the preparation method make a breakthrough, and a soldered spot cracking problem is solved finally. The produced alloy solder can not crack within 1000 hours under the double-85environment after conducting copper-aluminum soldering, and the stability and the durability of the soldered spot in a severe environment are guaranteed.
Description
Technical field
The invention belongs to Metal Material Welding technical field, relate to copper aluminium welding technology, specially refer to the leadless environment-friendly brazing filler metal alloy of cracking resistance, particularly a kind of tin zinc multicomponent alloy scolder (the polynary co-crystal solder without lead of tin zinc) and manufacture method for copper aluminium welding.
Technical background
Traditional tin-lead solder has great harm to human body and environment, because RoHS instruction and WEEE instruction get the Green Light at European Conference, makes the use of lead-free solder become inevitable.At present, unleaded plan and the legislation of electronic product are all being carried out in countries in the world, and electron trade is also actively being carried out lead-free solder and leadless process.
In large quantity research and practice process, find that Welding Sn-Zn material is had to better welding performance for aluminum bronze welding, but there is a kind of shortcoming after adopting this kind of scolder welding, in two 85 tests, (solder joint sample is placed in climatic chamber to the solder joint after welding, temperature is 85 DEG C, and relative humidity is 85%RH) deposit less than in environment cracking phenomena occurs for 200 hours.Can not meet cracking resistance requirement, according to electric reliability requirement, solder joint should keep not occurring above for 1000 hours cracking phenomena in two 85 experimental situations.The present invention is directed to a technique difficult problem, make a breakthrough from formula and the manufacture method of Welding Sn-Zn material, finally solved solder joint problem of Cracking.
Summary of the invention
The object of this invention is to provide a kind of formula of the tin zinc multicomponent alloy for copper aluminium welding and preparation method thereof, use the scolder that this formula and preparation method produce to use after supersonic welding connection technology soldering copper aluminium terminal, at two 85 environment, (sample is placed in climatic chamber to solder joint, temperature is 85 DEG C, and relative humidity is 85%RH) in keep within 1000 hours, do not ftracture.
For achieving the above object, the technical solution used in the present invention is:
For a tin zinc multicomponent alloy scolder for copper aluminium welding, it is characterized in that: it is made up of the raw material of following weight percentage:
Zinc Zn 3%～7%; Nickel 0.1%～0.5%; Tellurium Te 0.05%～0.2%; Neodymium Nd 0.01%～0.05%; Tinbase oxidation-resistant alloy 1%～1.5%; Tin Sn is surplus.
According to the described tin zinc multicomponent alloy scolder for copper aluminium welding, it is characterized in that: it is made up of the raw material of following weight percentage:
Zn 5%; Ni 0.3%; Te 0.1%; Nd 0.02%; Sn base oxidation-resistant alloy 1%; Sn is surplus.
According to the described tin zinc multicomponent alloy scolder for copper aluminium welding, it is characterized in that: it is made up of the raw material of following weight percentage:
Zn 7%; Ni 0.2%; Te 0.2%; Nd 0.03%; Sn base oxidation-resistant alloy 1.2%; Sn is surplus.
According to the described tin zinc multicomponent alloy scolder for copper aluminium welding, it is characterized in that: it is made up of the raw material of following weight percentage:
Zn 3%; Ni 0.2%; Te 0.15%; Nd 0.03%; Sn base oxidation-resistant alloy 1.2%; Sn is surplus.
According to the described tin zinc multicomponent alloy scolder for copper aluminium welding, it is characterized in that: it is made up of the raw material of following weight percentage:
Zn 4%; Ni 0.3%; Te 0.2%; Nd 0.01%; Sn base oxidation-resistant alloy 1.3%; Sn is surplus.
According to the described tin zinc multicomponent alloy scolder for copper aluminium welding, it is characterized in that: it is made up of the raw material of following weight percentage:
Zn 6%; Ni 0.4%; Te 0.07%; Nd 0.04%; Sn base oxidation-resistant alloy 1.5%; Sn is surplus.
A method of manufacturing the described tin zinc multicomponent alloy scolder for copper aluminium welding, is characterized in that: by the percentage by weight of described raw material, carry out according to the following steps:
(a) Sn of surplus is joined in vacuum melting furnace, melt completely and add zinc metal sheet, temperature to rise to 400 DEG C when Sn liquid temp reaches 370～380 DEG C until Sn, open and stir, speed is controlled at 100～150R/min, mixing time 15～20min;
(b) stirred after definite Zn melts completely and added nickel powder, added temperature to rise to 450 DEG C, opened and stir, speed is controlled at 150～200R/min, the about 10min of mixing time;
(c) add tellurium piece after having stirred, temperature keep 450 DEG C constant, stir 5min, speed is controlled in 50～100R/min;
(d) add Nd and Sn base oxidation-resistant alloy, temperature rises to 480 DEG C, stirs 15～25min, is down to 380 DEG C, adds sawdust 500g, NH
4cl 200g uses strainer to clear up surperficial scruff after stirring 10min;
(e) temperature is down to 350 DEG C of beginning cast alloys scolders, casting is front by the water-cooled switch opens of mould, after the rear observation of casting alloy bar surface is completely cooling, closes water-cooled switch and scolder is taken out to mould, being then placed in deionized water cooling rapidly, completing this casting cycle.
Beneficial effect of the present invention: the solder that the present invention produces can not ftracture after copper aluminium welding carrying out for 1000 hours in two 85 environment, has ensured stability and the persistence of solder joint in adverse circumstances.
The present invention has added 3%～7% Zn in tin zinc multicomponent alloy, due to the active and stronger creep resistance of Zn, if content exceedes 7%, although melting point depression, be more suitable for copper aluminium welding, but its fragility strengthens, ductility reduces, and in the time carrying out two 85 environmental experiments 1000 hours, cracking phenomena reaches 90% left and right.And content is in the time of 3% left and right, be less than 20% at 1000 hours cracking rates of two 85 environmental experiments, when Zn content exists hardly at 1000 hours cracking phenomenas of two 85 environmental experiments lower than 3% time, but weldability declines in copper aluminium welding process, also can have a negative impact to soldering reliability, consider the scope of Zn between 3%～7%.
The present invention adds 0.1%～0.5% nickel element in tin zinc multicomponent alloy, crystal grain in can refinement Solidification Structure, improve the mechanical property in alloy, increase solderability and anti-cracking performance, the brightness of postwelding solder joint is improved to effect simultaneously, but when being greater than the liquidus curve of alloy after 1%, the amount of nickel element starts to rise, and unfavorable to welding.
The present invention has added 0.05%～0.2%Te element at tin zinc multicomponent alloy, non-oxidizability and the wettability of Te element to scolder is very favourable, through experiment, while not adding Te element, scolder starts to produce oxidizing slag on 300 DEG C of surfaces, add 0.1% Te welding can be raised to 400 DEG C and do not produce oxidizing slag, in addition Te element also can improve the ductility of alloy, make scolder effectively overcome the stress producing in alloy in two 85 environment, solder joint splitting resistance is strengthened, but can make alloy softening as content exceedes 0.5%, product reliability is produced to harmful effect.
The present invention has added Sn base oxidation-resistant alloy and rare earth element nd in tin zinc multicomponent alloy, Sn base oxidation-resistant alloy has effectively prevented the easily oxidizable of Zn, increase endurance and the corrosion resistance of solder joint, Nd element is metal comparatively active in rare earth element, add trace can suitably put forward heavy alloyed high-performance, air-tightness and corrosion resistance, comparatively favourable to cracking resistance, Sn base oxidation-resistant alloy adds the too large effect of excessive nothing, increase on the contrary cost, Nd element can not add and exceed 0.5%, after exceeding, make the liquidus curve of alloy increase, and increase cost of alloy.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described:
A kind of tin zinc multicomponent alloy scolder (the polynary co-crystal solder without lead of tin zinc) for copper aluminium welding of the present invention, it is made up of the raw material of following weight percentage: zinc Zn 3%～7%, nickel 0.1%～0.5%, tellurium Te 0.05%～0.2%, neodymium Nd 0.01%～0.05%, tinbase oxidation-resistant alloy (including trace gallium, germanium, phosphorus) 1%～1.5%, tin Sn surplus.
The present invention, for the tin zinc multicomponent alloy scolder manufacture method of copper aluminium welding, carries out according to the following steps:
(a) Sn of surplus is joined in vacuum melting furnace, melt completely and add 3%～7% zinc metal sheet, temperature to rise to 400 DEG C when Sn liquid temp reaches 370～380 DEG C until Sn, open and stir, speed is controlled at 100～150R/min, mixing time 15～20min.
(b) stirred and determined that Zn adds 0.1%～0.5% nickel powder after melting completely, added temperature to rise to 450 DEG C, opened and stir, speed is controlled at 150～200R/min, the about 10min of mixing time.
(c) add 0.05%～0.2% tellurium piece after having stirred, temperature keep 450 DEG C constant, stir 5min, speed is controlled in 50～100R/min.
(d) add 0.01%～0.05%Nd and 1%～1.5% Sn base oxidation-resistant alloy, temperature rises to 480 DEG C, stirs 15～25min, is down to 380 DEG C, adds sawdust 500g, NH
4cl 200g uses strainer to clear up surperficial scruff after stirring 10min.
(e) temperature is down to 350 DEG C of beginning cast alloys scolders, casting is front by the water-cooled switch opens of mould, after the rear observation of casting alloy bar surface is completely cooling, closes water-cooled switch and scolder is taken out to mould, being then placed in deionized water cooling rapidly, completing this casting cycle.
embodiment 1
By Zn 5%, Ni 0.3%, Te 0.1%, Nd 0.02%, Sn base oxidation-resistant alloy 1%, the raw material of Sn surplus, according to above-mentioned smelting process, makes unleaded Welding Sn-Zn material of the present invention.
embodiment 2
By Zn 7%, Ni 0.2%, Te 0.2%, Nd 0.03%, Sn base oxidation-resistant alloy 1.2%, the raw material of Sn surplus, according to above-mentioned smelting process, makes unleaded Welding Sn-Zn material of the present invention.
embodiment 3
By Zn 3%, Ni 0.2%, Te 0.15%, Nd 0.03%, Sn base oxidation-resistant alloy 1.2%, the raw material of Sn surplus, according to above-mentioned smelting process, makes unleaded Welding Sn-Zn material of the present invention.
embodiment 4
By Zn 4%, Ni 0.3%, Te 0.2%, Nd 0.01%, Sn base oxidation-resistant alloy 1.3%, the raw material of Sn surplus, according to above-mentioned smelting process, makes unleaded Welding Sn-Zn material of the present invention.
embodiment 5
By Zn 6%, Ni 0.4%, Te 0.07%, Nd 0.04%, Sn base oxidation-resistant alloy 1.5%, the raw material of Sn surplus, according to above-mentioned smelting process, makes unleaded Welding Sn-Zn material of the present invention.
Embodiment recited above is described the preferred embodiment of the present invention; not design of the present invention and protection domain are limited; do not departing under the prerequisite of design concept of the present invention; various modification and improvement that in this area, common engineers and technicians make technical scheme of the present invention, all should fall into protection scope of the present invention.
Claims (6)
1. for a tin zinc multicomponent alloy scolder for copper aluminium welding, it is characterized in that: it is made up of the raw material of following weight percentage:
Zinc Zn3%～7%; Nickel 0.1%～0.5%; Tellurium Te0.05%～0.2%; Neodymium Nd0.01%～0.05%; Tinbase oxidation-resistant alloy 1%～1.5%; Tin Sn is surplus;
By the percentage by weight of described raw material, carry out according to the following steps:
(a) Sn of surplus is joined in vacuum melting furnace, melt completely and add zinc metal sheet, temperature to rise to 400 DEG C when Sn liquid temp reaches 370～380 DEG C until Sn, open and stir, speed is controlled at 100～150R/min, mixing time 15～20min;
(b) stirred after definite Zn melts completely and added nickel powder, added temperature to rise to 450 DEG C, opened and stir, speed is controlled at 150～200R/min, the about 10min of mixing time;
(c) add tellurium piece after having stirred, temperature keep 450 DEG C constant, stir 5min, speed is controlled in 50～100R/min;
(d) add Nd and Sn base oxidation-resistant alloy, temperature rises to 480 DEG C, stirs 15～25min, is down to 380 DEG C, adds sawdust 500g, NH
4cl 200g uses strainer to clear up surperficial scruff after stirring 10min;
(e) temperature is down to 350 DEG C of beginning cast alloys scolders, casting is front by the water-cooled switch opens of mould, after the rear observation of casting alloy bar surface is completely cooling, closes water-cooled switch and scolder is taken out to mould, being then placed in deionized water cooling rapidly, completing this casting cycle.
2. the tin zinc multicomponent alloy scolder for copper aluminium welding according to claim 1, is characterized in that: it is made up of the raw material of following weight percentage:
Zn 5%; Ni 0.3%; Te 0.1%; Nd 0.02%; Sn base oxidation-resistant alloy 1%; Sn is surplus.
3. the tin zinc multicomponent alloy scolder for copper aluminium welding according to claim 1, is characterized in that: it is made up of the raw material of following weight percentage:
Zn 7%; Ni 0.2%; Te 0.2%; Nd 0.03%; Sn base oxidation-resistant alloy 1.2%; Sn is surplus.
4. the tin zinc multicomponent alloy scolder for copper aluminium welding according to claim 1, is characterized in that: it is made up of the raw material of following weight percentage:
Zn 3%; Ni 0.2%; Te 0.15%; Nd 0.03%; Sn base oxidation-resistant alloy 1.2%; Sn is surplus.
5. the tin zinc multicomponent alloy scolder for copper aluminium welding according to claim 1, is characterized in that: it is made up of the raw material of following weight percentage:
Zn 4%; Ni 0.3%; Te 0.2%; Nd 0.01%; Sn base oxidation-resistant alloy 1.3%; Sn is surplus.
6. the tin zinc multicomponent alloy scolder for copper aluminium welding according to claim 1, is characterized in that: it is made up of the raw material of following weight percentage:
Zn 6%; Ni 0.4%; Te 0.07%; Nd 0.04%; Sn base oxidation-resistant alloy 1.5%; Sn is surplus.
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| CN201310174628.9A CN103240541B (en) | 2013-05-13 | 2013-05-13 | Tin zinc multi-element alloy solder for soldering copper and aluminum and preparation method thereof |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104588911A (en) * | 2014-12-11 | 2015-05-06 | 徐国华 | Lead-free solder and preparation method thereof |
| WO2017179325A1 (en) * | 2016-04-11 | 2017-10-19 | 株式会社村田製作所 | High frequency component |
| CN110402181A (en) * | 2018-12-13 | 2019-11-01 | 北京联金高新科技有限公司 | SnZn series lead-free solder and preparation method thereof |
| CN109926750B (en) * | 2019-05-17 | 2021-03-30 | 云南锡业集团（控股）有限责任公司研发中心 | Low-temperature lead-free solder alloy and vacuum casting method thereof |
| CN112247300B (en) * | 2020-09-11 | 2022-04-29 | 中国电子科技集团公司第十三研究所 | Electronic component welding method and surface-mounted electronic component welding method |
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| CN1390672A (en) * | 2002-05-10 | 2003-01-15 | 大连理工大学 | Leadfree SnZn-base alloy solder containing rare-earth elements |
| CN101092006A (en) * | 2006-06-21 | 2007-12-26 | 北京有色金属研究总院 | Lead-free solder for micro alloyed eutectic alloy of stannum and zinc |
| CN101351297A (en) * | 2005-09-26 | 2009-01-21 | 美国铟泰公司 | Low melting temperature compliant solders |
| CN102489892A (en) * | 2010-12-31 | 2012-06-13 | 广东中实金属有限公司 | SnZn-based lead-free brazing filler metal containing Cr |
| CN102581507A (en) * | 2012-01-19 | 2012-07-18 | 广东中实金属有限公司 | Tin, zinc and bismuth multi-element eutectic lead-free solder and preparation method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4391276B2 (en) * | 2004-03-12 | 2009-12-24 | 新日鉄マテリアルズ株式会社 | Solder alloy for semiconductor mounting, manufacturing method thereof, solder ball, electronic member |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1390672A (en) * | 2002-05-10 | 2003-01-15 | 大连理工大学 | Leadfree SnZn-base alloy solder containing rare-earth elements |
| CN101351297A (en) * | 2005-09-26 | 2009-01-21 | 美国铟泰公司 | Low melting temperature compliant solders |
| CN101092006A (en) * | 2006-06-21 | 2007-12-26 | 北京有色金属研究总院 | Lead-free solder for micro alloyed eutectic alloy of stannum and zinc |
| CN102489892A (en) * | 2010-12-31 | 2012-06-13 | 广东中实金属有限公司 | SnZn-based lead-free brazing filler metal containing Cr |
| CN102581507A (en) * | 2012-01-19 | 2012-07-18 | 广东中实金属有限公司 | Tin, zinc and bismuth multi-element eutectic lead-free solder and preparation method |
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