CN103100825A - Manufacturing method for pre-alloying gold-tin pre-forming soldering lug - Google Patents
Manufacturing method for pre-alloying gold-tin pre-forming soldering lug Download PDFInfo
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- CN103100825A CN103100825A CN201310004391XA CN201310004391A CN103100825A CN 103100825 A CN103100825 A CN 103100825A CN 201310004391X A CN201310004391X A CN 201310004391XA CN 201310004391 A CN201310004391 A CN 201310004391A CN 103100825 A CN103100825 A CN 103100825A
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Abstract
The invention provides a manufacturing method for a pre-alloying gold-tin pre-forming soldering lug. The process of the method mainly comprises five steps such as raw material preparation, pre-alloying, hot rolling, annealing and blanking forming. Due to the fact that N2+H2 mixed protective gas is injected into a vacuum melting protective system to conduct the pre-alloying, gold-tin alloy is not prone to be oxidized in melting process. Due to adoption of the hot rolling and annealing blanking of gold-tin materials after the pre-alloying, a machined gold-tin soldering lug is accurate in composition, complete and precise in shape and excellent in soldering using performance. Meanwhile, the manufacturing method for the pre-alloying gold-tin pre-forming soldering lug has the advantages of being simple in technology and process, reasonable in production cost and high in production efficiency.
Description
Technical field
The present invention relates to welding technology field, relate in particular to a kind of preparation method of pre-alloyed golden tin preformed soldering.
Background technology
Because the fusing point (280 ℃) of golden 80% tin 20% eutectic alloy is moderate, intensity is high, heat conduction and conducting electricity very well, wellability is good, low viscosity, easily welding, anticorrosive, creep resistant need not need not the advantages such as scaling powder, therefore, ceramic package capping at microelectronic component and opto-electronic device, die bonding, the ceramic insulator welding of Metal Packaging has a wide range of applications in the chips welding of high power semiconductor lasers.
The gold tin solder weak point be: when melting is pre-alloyed easily oxidized, performance is more crisp, percentage elongation is very little, be difficult to make thin strip and the deep processed product thereof that meets the microelectronic component instructions for use with conventional manufacture method, thus serious restriction the development of golden tin solder in China.Easy oxidized technical problem during for golden tin solder melting, the patent No. are that 201110198333.6 Chinese invention patent discloses " a kind of aurum tin soldering material melting guard method ".
The cored solder that can be used for microelectronics Packaging has a lot of forms, and topmost have forms such as silk, sheet, soldering paste and preformation matrix.Based on the very crisp characteristic of gold-tin alloy, these forms of silk or sheet are difficult to according to specification machine-shaping.In these all forms, solder paste is for the optimal form of Electronic Packaging.Yet one of composition of solder paste is scaling powder, and this is forbidden in many applications.Even in the situation that can use scaling powder, also will carry out the cleaning of its residue to the components and parts of assembling after brazing process is completed.Therefore, for the stability that obtains to use such as device production and encapsulation etc., correct selection should be stamping forming preformation matrix.The preformation matrix can be guaranteed accurate dosage and the accurate location of cored solder, obtains best quality to reach in the least cost situation.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of preparation method of pre-alloyed golden tin preformed soldering, and easy oxidation when the method can effectively solve the gold-tin alloy melting, brittle alloy are difficult to roll and the problem of stamping-out moulding.
For solving the problems of the technologies described above, the invention provides a kind of preparation method of pre-alloyed golden tin preformed soldering, comprise the steps:
(1) resistance furnace, crucible, mold and quartz pushrod are arranged in vacuum glove box, wherein the Control for Kiln Temperature cabinet of resistance furnace is positioned over the outside of described vacuum glove box, and described resistance furnace, crucible, mold, quartz pushrod and vacuum glove box have consisted of a pre-alloyed system of protection;
The golden tin material that (2) will prepare in advance (weight ratio of Jin Yuxi is 80:20) is put into the pre-alloyed system of the protection that has configured;
(3) start vavuum pump and vacuumize, until pressure be-0.1MPa or-below 0.1MPa, then vavuum pump is shut down;
(4) be filled with N
2+ H
2Gaseous mixture (H
2Percent by volume example in gaseous mixture is 5%-10%) to atmospheric pressure;
(5) starting resistance stove, and set pre-alloyed temperature (pre-alloyed temperature is 350 ℃-500 ℃) by described Control for Kiln Temperature cabinet;
(6) successively add tin material and gold material in crucible, and stir by quartz pushrod in good time;
(7) form ingot casting in ingot mould until pre-alloyed liquation being cast to after good;
(8) ingot casting that above-mentioned steps (7) is obtained heats and is incubated, and continuous calendering is the thin strip of 0.015mm to 0.4mm to thickness;
(9) thin strip that above-mentioned steps (8) is obtained is carried out annealing in process;
(10) with the thin strip stamping-out moulding weld tabs after above-mentioned annealing.
Preferred technical scheme is that the thickness of described ingot casting is 5mm.
Further preferred technical scheme is, in described step (8), the ingot casting that obtains is heated to 180-220 ℃ and insulation and carries out continuous calendering.The temperature of described step (9) annealing is 260 ℃.The annealing in process of described step (9) is to carry out in the oxygen barrier reducing atmosphere.Described oxygen barrier reducing atmosphere is N2+H2
MistIn described mist, the percent by volume of N2 and H2 is 25:75.The annealing time of described step (9) is 3 hours.
Further preferred technical scheme is that the thickness of described thin strip is 0.15mm.Described weld tabs is square, square frame, disk, annular, strip or special-shaped weld tabs.
The present invention injects N owing to adopting in the vacuum melting protection system
2+ H
2Hybrid protection gas carry out pre-alloyedly, be not easy oxidation during the gold-tin alloy melting; Owing to adopting, pre-alloyed golden tin material is carried out hot rolling and annealing stamping-out, make that the golden soldering sheet composition that processes is accurate, shape is complete accurately, welding serviceability excellence.Simultaneously, have technique process and simplify, production cost is more reasonable, the advantage that production efficiency is higher.
The specific embodiment
A kind of manufacture method for preparing the gold-tin alloy preformed soldering of the present invention, its process mainly comprises: the five steps such as raw material preparation, pre-alloyed, hot rolling, annealing and stamping-out moulding.
Wherein, raw material preparation and pre-alloyed comprising the steps:
(1) resistance furnace, crucible, mold and quartz pushrod are arranged in vacuum glove box, wherein the Control for Kiln Temperature cabinet of resistance furnace is positioned over the outside of described vacuum glove box, and described resistance furnace, crucible, mold, quartz pushrod and vacuum glove box have consisted of a pre-alloyed system of protection;
The golden tin material that (2) will prepare in advance (weight ratio of Jin Yuxi is 80:20) is put into the pre-alloyed system of the protection that has configured;
(3) start vavuum pump and vacuumize, until pressure be-0.1MPa or-below 0.1MPa, then vavuum pump is shut down;
(4) be filled with N
2+ H
2Gaseous mixture (H
2Percent by volume example in gaseous mixture is 5%-10%) to atmospheric pressure;
(5) starting resistance stove, and set pre-alloyed temperature (pre-alloyed temperature is 350 ℃-500 ℃) by described Control for Kiln Temperature cabinet;
(6) successively add tin material and gold material in crucible, and stir by quartz pushrod in good time;
(7) after pre-alloyed getting well, liquation is cast in ingot mould.
Below in conjunction with specific embodiment, explanation that the present invention is further elaborated.
Embodiment 1
(1) raw material preparation
Be that 99.99% gold, 25g purity are that the raw material of 99.99% tin prepares with 100g purity;
(2) pre-alloyed
Above-mentioned steps (1) gained raw material is put into the crucible of atmosphere protection vacuum glove box, (percent by volume of H2 in gaseous mixture is 10% at the N2+H2 protective atmosphere, air pressure is an atmospheric pressure) under be heated to 350 ℃ and be fused into uniform liquid gold-tin alloy and carry out pre-alloyedly, and be cast to and form the template alloy cast ingot that is of a size of (the wide x of long x is thick) 115x15x5mm in ingot mould; Whole process should be completed in the vacuum glove box of atmosphere protection, guarantees that alloy cast ingot does not have oxidation.
(3) hot rolling
The pre-alloyed gold-tin alloy ingot casting of the template that makes in above-mentioned steps (2) is heated to 220 ℃,, adopt accurate hot-rolling mill calendering gold-tin alloy ingot casting, the ingot casting insulation at 220 ℃, is depressed into the thin strip that thickness is 0.015mm continuously.
(4) annealing
Thin strip with hot rolling gained in above-mentioned steps (3) heats and is incubated at 260 ℃ and carried out annealing in process 3 hours; Above-mentioned annealing process must be carried out under the oxygen barrier reducing atmosphere protection that continues, and above-mentioned oxygen barrier reducing atmosphere is the N that the liquid ammonia with pressure 0.02Mpa resolves at the temperature of 880 ℃
2+ H
2Mist, the percent by volume of this mist is: N
2Accounting 25%, H
2Accounting 75%.
(5) stamping-out
After reducing the hardness of golden tin thin strip and increase toughness through above-mentioned steps (4), by the optical precision Dies ' Blanking, obtain being of a size of the square weld tabs of 0.25*0.25*0.015mm.
Embodiment 2
(1) raw material preparation
Be that 99.99% gold, 50g purity are that the raw material of 99.99% tin prepares with 200g purity;
(2) pre-alloyed
Step (1) gained raw material is put into the crucible of atmosphere protection vacuum glove box, (percent by volume of H2 in gaseous mixture is 5% at the N2+H2 protective atmosphere, air pressure is an atmospheric pressure) under be heated to 420 ℃ and be fused into uniform liquid gold-tin alloy and carry out pre-alloyedly, and be cast to and form the template alloy cast ingot that is of a size of (the wide x of long x is thick) 140x25x5mm in ingot mould; Whole process should be completed in the vacuum glove box of atmosphere protection, guarantees that alloy cast ingot does not have oxidation.
(3) hot rolling
With making the pre-alloyed gold-tin alloy ingot casting of template in step (2), be heated to 200 ℃, adopt accurate hot-rolling mill calendering gold-tin alloy ingot casting, the ingot casting insulation at 200 ℃, is depressed into the thin strip that thickness is 0.15mm continuously.
(4) annealing
Thin strip with hot rolling gained in above-mentioned steps (3) heats and is incubated at 260 ℃ and carried out annealing in process 3 hours; Above-mentioned annealing process must be carried out under the oxygen barrier reducing atmosphere protection that continues, and above-mentioned oxygen barrier reducing atmosphere is the N that the liquid ammonia with pressure 0.02Mpa resolves at the temperature of 880 ℃
2+ H
2Mist, the percent by volume of this mist is: N
2Accounting 25%, H
2Accounting 75%.
(5) stamping-out
After reducing the hardness of golden tin thin strip and increase toughness through above-mentioned steps (4), by the optical precision Dies ' Blanking, obtain being of a size of the annular weld tabs of Ф 2.9* Ф 2.22*0.15mm.
Embodiment 3
(1) raw material preparation
Be that 99.99% gold, 75g purity are that the raw material of 99.99% tin prepares with 300g purity;
(2) pre-alloyed
Step (1) gained raw material is put into the crucible of atmosphere protection vacuum glove box, (percent by volume of H2 in gaseous mixture is 7% at the N2+H2 protective atmosphere, air pressure is an atmospheric pressure) under be heated to 500 ℃ and be fused into uniform liquid gold-tin alloy and carry out pre-alloyedly, and be cast to and form the template alloy cast ingot that is of a size of (the wide x of long x is thick) 175x30x5mm in ingot mould; Whole process should be completed in the vacuum glove box of atmosphere protection, guarantees that alloy cast ingot does not have oxidation.
(3) hot rolling
With making the pre-alloyed gold-tin alloy ingot casting of template in step (2), be heated to 180 ℃, adopt accurate hot-rolling mill calendering gold-tin alloy ingot casting, the ingot casting insulation at 180 ℃, is depressed into the thin strip that thickness is 0.4mm continuously.
(4) annealing
Thin strip with hot rolling gained in above-mentioned steps (3) heats and is incubated at 260 ℃ and carried out annealing in process 3 hours; Above-mentioned annealing process must be carried out under the oxygen barrier reducing atmosphere protection that continues; Above-mentioned oxygen barrier reducing atmosphere is the N that the liquid ammonia with pressure 0.02Mpa resolves at the temperature of 880 ℃
2+ H
2Mist, the percent by volume of this mist is: N
2Accounting 25%, H
2Accounting 75%.
(5) stamping-out
After reducing the hardness of golden tin thin strip and increase toughness through above-mentioned steps (4), by the optical precision Dies ' Blanking, obtain being of a size of the annulus weld tabs of Ф 0.76* Ф 0.38*0.25mm.
In addition to the implementation, the weld tabs after step of the present invention (5) stamping-out can also be square frame, disk, strip or special-shaped weld tabs.
Need to prove at last, the above is only preferred embodiment of the present invention, rather than to the restriction of technical solution of the present invention, any the technology of the present invention feature being equal to of doing is replaced or corresponding improvement, still within protection scope of the present invention.
Claims (10)
1. the preparation method of a pre-alloyed golden tin preformed soldering, comprise the steps:
(1) resistance furnace, crucible, mold and quartz pushrod are arranged in vacuum glove box, wherein the Control for Kiln Temperature cabinet of resistance furnace is positioned over the outside of described vacuum glove box, and described resistance furnace, crucible, mold, quartz pushrod and vacuum glove box have consisted of a pre-alloyed system of protection;
The golden tin material that (2) will prepare in advance (weight ratio of Jin Yuxi is 80:20) is put into the pre-alloyed system of the protection that has configured;
(3) start vavuum pump and vacuumize, until pressure be-0.1MPa or-below 0.1MPa, then vavuum pump is shut down;
(4) be filled with N
2+ H
2Gaseous mixture (H
2Percent by volume example in gaseous mixture is 5%-10%) to atmospheric pressure;
(5) starting resistance stove, and set pre-alloyed temperature (pre-alloyed temperature is 350 ℃-500 ℃) by described Control for Kiln Temperature cabinet;
(6) successively add tin material and gold material in crucible, and stir by quartz pushrod in good time;
(7) form ingot casting in ingot mould until pre-alloyed liquation being cast to after good;
It is characterized in that, also comprise the steps:
(8) ingot casting that above-mentioned steps (7) is obtained heats and is incubated, and continuous calendering is the thin strip of 0.015mm to 0.4mm to thickness;
(9) thin strip that above-mentioned steps (8) is obtained is carried out annealing in process;
(10) with the thin strip stamping-out moulding weld tabs after above-mentioned annealing.
2. the preparation method of a kind of pre-alloyed golden tin preformed soldering as claimed in claim 1, it is characterized in that: the thickness of described ingot casting is 5mm.
3. the preparation method of a kind of pre-alloyed golden tin preformed soldering as claimed in claim 1 is characterized in that: in described step (8), the ingot casting that obtains is heated to 180-220 ℃ and insulation and carries out continuous calendering.
4. the preparation method of a kind of pre-alloyed golden tin preformed soldering as claimed in claim 1 is characterized in that: the temperature of described step (9) annealing is 260 ℃.
5. the preparation method of a kind of pre-alloyed golden tin preformed soldering as claimed in claim 4, it is characterized in that: the annealing in process of described step (9) is to carry out in the oxygen barrier reducing atmosphere.
6. the preparation method of a kind of pre-alloyed golden tin preformed soldering as claimed in claim 5, it is characterized in that: described oxygen barrier reducing atmosphere is the mist of N2+H2.
7. the preparation method of a kind of pre-alloyed golden tin preformed soldering as claimed in claim 6, it is characterized in that: in described mist, the percent by volume of N2 and H2 is 25:75.
8. the preparation method of a kind of pre-alloyed golden tin preformed soldering as described in claim 4 to 7, it is characterized in that: the annealing time of described step (9) is 3 hours.
9. the preparation method of a kind of pre-alloyed golden tin preformed soldering as claimed in claim 1, it is characterized in that: the thickness of described thin strip is 0.15mm.
10. the preparation method of a kind of pre-alloyed golden tin preformed soldering as claimed in claim 1, it is characterized in that: described weld tabs is square, square frame, disk, annular, strip or special-shaped weld tabs.
Priority Applications (1)
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|---|---|---|---|
| CN201310004391XA CN103100825A (en) | 2013-01-07 | 2013-01-07 | Manufacturing method for pre-alloying gold-tin pre-forming soldering lug |
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|---|---|---|---|
| CN201310004391XA CN103100825A (en) | 2013-01-07 | 2013-01-07 | Manufacturing method for pre-alloying gold-tin pre-forming soldering lug |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103639620A (en) * | 2013-12-04 | 2014-03-19 | 广州先艺电子科技有限公司 | Method for manufacturing Sn-Bi brittle alloy performed soldering lug |
| CN106670735A (en) * | 2016-08-31 | 2017-05-17 | 北京时代民芯科技有限公司 | High-precision welding piece cutting method |
| CN106881353A (en) * | 2016-12-23 | 2017-06-23 | 贵研铂业股份有限公司 | A kind of gold alloy foil solder preparation method |
| CN107267905A (en) * | 2013-05-17 | 2017-10-20 | Ak钢铁产权公司 | The galvanized steel and production method applied for die quenching |
| CN109513747A (en) * | 2018-09-25 | 2019-03-26 | 深圳市兴鸿泰锡业有限公司 | It is a kind of to prepare difficult deformation sn-bi alloy preformed soldering method |
| CN110512102A (en) * | 2019-10-11 | 2019-11-29 | 云南锡业集团（控股）有限责任公司研发中心 | A kind of preparation method of Sn-Ag-Cu alloy preform weld tabs |
| CN111805181A (en) * | 2020-07-20 | 2020-10-23 | 石家庄恒融世通电子科技有限公司 | Method for preparing preformed soldering lug |
| CN113000601A (en) * | 2021-01-21 | 2021-06-22 | 西安诺博尔稀贵金属材料股份有限公司 | Method for preparing gold-tin alloy foil |
| CN113088748A (en) * | 2021-04-02 | 2021-07-09 | 深圳市荟艺珠宝实业有限公司 | Preparation method of gold solder |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN106670735A (en) * | 2016-08-31 | 2017-05-17 | 北京时代民芯科技有限公司 | High-precision welding piece cutting method |
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| CN109513747A (en) * | 2018-09-25 | 2019-03-26 | 深圳市兴鸿泰锡业有限公司 | It is a kind of to prepare difficult deformation sn-bi alloy preformed soldering method |
| CN109513747B (en) * | 2018-09-25 | 2020-06-30 | 深圳市兴鸿泰锡业有限公司 | Method for preparing tin-bismuth alloy preformed soldering lug difficult to deform |
| CN110512102A (en) * | 2019-10-11 | 2019-11-29 | 云南锡业集团（控股）有限责任公司研发中心 | A kind of preparation method of Sn-Ag-Cu alloy preform weld tabs |
| CN110512102B (en) * | 2019-10-11 | 2021-06-22 | 云南锡业集团（控股）有限责任公司研发中心 | Preparation method of Sn-Ag-Cu alloy preformed soldering lug |
| CN111805181A (en) * | 2020-07-20 | 2020-10-23 | 石家庄恒融世通电子科技有限公司 | Method for preparing preformed soldering lug |
| CN113000601A (en) * | 2021-01-21 | 2021-06-22 | 西安诺博尔稀贵金属材料股份有限公司 | Method for preparing gold-tin alloy foil |
| CN113088748A (en) * | 2021-04-02 | 2021-07-09 | 深圳市荟艺珠宝实业有限公司 | Preparation method of gold solder |
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Application publication date: 20130515 |