CN202175744U - Stannum-based brazing filler metal alloy controllable solidification platform - Google Patents
Stannum-based brazing filler metal alloy controllable solidification platform Download PDFInfo
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- CN202175744U CN202175744U CN2011201534135U CN201120153413U CN202175744U CN 202175744 U CN202175744 U CN 202175744U CN 2011201534135 U CN2011201534135 U CN 2011201534135U CN 201120153413 U CN201120153413 U CN 201120153413U CN 202175744 U CN202175744 U CN 202175744U
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Abstract
The utility model discloses a stannum-based brazing filler metal alloy controllable solidification platform, which belongs to the field of material property basic research. The whole platform can be divided into two modules around a directional solidification furnace, namely a heating module and a cooling module. The heating module of the directional furnace is formed by a lateral thermal insulation device connected with a temperature controller and a thermal compensation electric furnace at the bottom. The cooling module is formed by a lifting holder part and a cooling water circulation part. The stannum-based brazing filler metal alloy controllable solidification platform has the advantages of being simple, convenient, easy to dismount and capable of achieving different cooling speed by utilizing different cooling media and cooling media circulation methods so as to control solidification microscopic structure of the brazing filler metal alloy.
Description
Technical field
The utility model is the controlled platform that solidifies of Sn base solder alloy, belongs to material property fundamental research field, reaches the purpose of control microstructure through the rate of cooling of control coagulation phase and the direction of growth of crystal grain, thereby prepares the anisotropy solder alloy.Through the performance difference of research solder alloy on different orientation, can establish theory basis for exploitation high-performance, high reliability lead-free brazing.
Background technology
The official's instruction that is accompanied by European Parliament and the official approval WEEE of EU Committee (Waste Electrical and Electronic Equipment) and RHS (Restriction of Hazardous Materials) comes into force, and lead-free brazing and leadless electronic assembling become historical inevitable.In the process that substitutes traditional Sn-Pb solder, the safety of lead-free brazing is the subject under discussion that receives much concern.
At present, the Sn base leadless solder is widely used in electronics assembling industry.Yet than traditional Sn-Pb solder, the safety of lead-free brazing needs further to improve.From the angle of material modification, can realize lifting through the mode that changes solder connector postwelding microstructure to its macro property.For fear of the forming core of imperfect tissue with grow up, the adjustment of solder alloy composition and the method for introducing other micro-constituent element receive people's attention most.At present; There have been a lot of research institutions and enterprise to adopt the method for above-mentioned restriction grain-size; And suppress to a certain extent or alleviated the solder connector phenomenon of coarse microstructure in the process under arms, and relevant mechanics and the electricity safety of solder alloy have been improved.Yet in the research field of solder alloy preparation and joint brazing, rarer means of solidifying through the control solder achieve the above object.
Directional freeze is meant the thermograde of setting up specific direction at the liquid-solid interface place, thereby melt is solidified along the direction opposite with hot-fluid, finally obtains directed tissue even monocrystalline.Directional solidification technique is widely used in preparing the tissue with particular orientation and the material of excellent properties, and it can improve the required performance of material significantly.Yet directional solidification technique is mainly used in superalloy at present, semiconductor material, and magneticsubstance and prepare composite relate to very few for the solder that plays connection and support structure in the Electronic Packaging field.Require to have on the specific direction excellent conduction during Electronic Packaging connects, heat conduction and mechanical property have proposed the requirement of anisotropic to material, to improve electronic package reliability.
Based on alloy directionally solidified technology; As solder alloy is solidified along a certain direction; Can obtain to have remarkable anisotropic solder alloy,, can establish theory basis for exploitation high-performance, high reliability lead-free brazing through studying its performance difference on different orientation.
The utility model content
The utility model purpose is to provide a cover low-temperature brazing filler metal the controlled platform that solidifies.This preparation platform is based on alloy directionally solidified technology; Through control to rate of cooling; Obtain solder with different directional freeze microstructures; The performance difference research that can be the different orientation solder alloy provides suitable sample, and establishes theory basis for the exploitation of high-performance, high reliability lead-free brazing.
In order to achieve the above object, the utility model has been taked following technical scheme.Sn base solder alloy solidifiable platform, whole flat can be divided into two modules, heating module and refrigerating modules around directional solidification furnace.The heating module of directional solidification furnace is made up of the side direction attemperator that is connected with temperature controller and bottom thermal compensation electric furnace two portions, and refrigerating module is made up of up-down The Cloud Terrace and cooling water circulation two portions.
Heating module: the input terminus of temperature controller 1 inserts thermopair 2, and this thermopair 2 inserts directed burner hearth 5 from the center of directed bell 3, its objective is the collection fire box temperature; Temperature controller 1 output terminal connects ring heater 4, and ring heater 4 is resistive heating devices, coats the side of directed burner hearth 5, its objective is stable orientation furnace side surface temperature.Thermopair 2 is gathered directed burner hearth 5 internal temperatures in real time, feeds back to temperature controller 1, temperature controller 1 control ring heater 4, thus reach the purpose of stablizing side wall temperatures.The effect of directed bell 3 has two, and the one, cut off air, prevent molten metal oxidation in the stove, the 2nd, insulation improves heating efficiency.Directed burner hearth 5 bottoms contacts with aluminum heating panel 8, and there is high-temperature sealing gasket 7 centre, and directed burner hearth 5, elevated-temperature seal sheet 7, aluminum heating panel 8 threes pass through directed furnace fixture 6 combinations at edge.The middle part perforate of aluminum heating panel 8, the top is provided with boss, and boss embeds in the centre hole of elevated-temperature seal sheet 7.The main effect of aluminum heating panel 8 is heat radiations; Middle perforate purpose is to rise when refrigerating module, during water coolant submergence aluminum heating panel 8, increases and the contact area of aluminum heating panel 8 with water coolant; Quicken heat radiation, the boss setting is inner in order to make whole melt metal be in the side direction heat preservation zone; The effect of high-temperature sealing gasket 7 is isolated water coolants and organizes the thorax wall of directed burner hearth 7 and the heat transfer between the aluminum heating panel 8.Whole directed stove supports jig 9 clampings with directed stove, is fixed on the iron stand 10.Aluminum heating panel 8 belows are equipped with thermal compensation electric furnace 11, and thermal compensation electric furnace 11 supports jig 13 clampings and is fixed on through the thermal compensation electric furnace and moves on the bracing frame 12, and thermal compensation electric furnace 11 and mobile bracing frame 12 are separable, removable with directed stove.Its objective is and work as metal melting, and directed stove is in heat tracing during the stage, the heat that loses in air by aluminum heating panel 8 for whole smelting furnace compensation, and when directed stove cools off, can withdraw with mobile bracing frame 12 rapidly again.
Refrigerating module: cooling vessel 15 be installed on thermal compensation electric furnace 11 under, cooling vessel 15 both sides are equipped with cooling water inlet pipe 14 and cooling water outlet pipe 16.Cooling vessel 15, and cooling water outlet pipe 16 is the carrier of the turnover of heat-eliminating medium in the refrigerating module.In order to reach best cooling performance, water-cooled tube connects the formation flow circuit with the externally cooled medium, to guarantee the temperature of heat-eliminating medium in the cooling vessel 15.Cooling water circulationly can control flow rate through water pump.Cooling vessel 15 is placed on the up-down The Cloud Terrace 17, can regulate the height of cooling vessel 15 through adjustment The Cloud Terrace lifting nut 18.
The advantage of the utility model is that whole device is simple and convenient, and is quick detachable, can reach different rate of cooling through using different heat-eliminating mediums and heat-eliminating medium Recycle design, thereby controls the microstructure of solidifying of solder alloy.
Description of drawings
Fig. 1: the controlled platform group synoptic diagram that solidifies of Sn base solder alloy
Fig. 2: the controlled platform front view that solidifies of Sn base solder alloy
Fig. 3: directional solidification furnace front view
Fig. 4: directional freeze vertical view
Fig. 5: aluminum heating panel front view
Fig. 6: aluminum heating panel vertical view
Among the figure: 1-temperature controller, 2-thermopair, the directed bell of 3-, 4-ring heater, the directed burner hearth of 5-; The directed furnace fixture of 6-, the 7-high-temperature sealing gasket, 8-aluminum heating panel, 9-is directed, and stove supports jig, 10-iron stand; 11-thermal compensation electric furnace, 12-moves bracing frame, and 13-thermal compensation electric furnace supports jig, 14-cooling water outlet pipe; The 15-cooling vessel, 16-cooling water inlet pipe, 17-up-down The Cloud Terrace, 18-The Cloud Terrace lifting nut.
Embodiment
Concrete operations mode below in conjunction with the accompanying drawing tracing device.
Sn base solder alloy solidifiable platform is as shown in Figure 1, and whole flat can be divided into two modules, heating module and refrigerating modules around directional solidification furnace.The heating module of directed stove is made up of side direction attemperator and bottom thermal compensation electric furnace two portions of Controllable Temperature, and refrigerating module is made up of up-down The Cloud Terrace and cooling water circulation two portions.The controlled platform front view that solidifies shown in Figure 2 has showed that the particular location of each module and part concerns and the correlation function details.Dotted line top is heating module among Fig. 2, and the bottom is a refrigerating module.
Heating module: the input terminus of temperature controller 1 inserts thermopair 2, and this thermopair inserts directed burner hearth 5 from the center of directed bell 3, its objective is the collection fire box temperature; Temperature controller 1 output terminal connects ring heater 4, and ring heater 4 is resistive heating devices, coats the side of directed burner hearth 5, its objective is stable orientation furnace side surface temperature.Thermopair 2 is gathered directed burner hearth 5 internal temperatures in real time, feeds back to temperature controller 1, temperature controller 1 control ring heater 4, thus reach the purpose of stablizing side wall temperatures.The effect of directed bell-3 has two, and the one, cut off air, prevent molten metal oxidation in the stove, the 2nd, insulation improves heating efficiency.Directed burner hearth 5 bottoms contacts with aluminum heating panel 8, and there is high-temperature sealing gasket 7 centre, and directed burner hearth 5, elevated-temperature seal sheet 7, aluminum heating panel 8 threes pass through directed furnace fixture-6 combination at edge.Directed hotplate body details is seen Fig. 3 and Fig. 4, and Fig. 3 is the front view of directed stove, and Fig. 4 is directed stove vertical view.The correlative detail of front view 5 and vertical view 6 demonstration aluminum heating panels 8.The middle part perforate of aluminum heating panel 8, the top is provided with boss, and boss embeds in the centre hole of elevated-temperature seal sheet 7.The main effect of aluminum heating panel 8 is heat radiations, when refrigerating module rises, during water coolant submergence aluminum heating panel 8, increase its with water coolant by area, quicken heat radiation, the boss setting is in order to make whole melt metal be in side direction heat preservation zone inside; The effect of high-temperature sealing gasket-7 is isolated water coolants and organizes the thorax wall of directed burner hearth-7 and the heat transfer between the aluminum heating panel-8.Whole directed stove supports jig 9 clampings with directed stove, is fixed on the iron stand 10.Aluminum heating panel 8 belows are equipped with thermal compensation electric furnace 11, and thermal compensation electric furnace 11 supports jig 13 clampings and is fixed on through the thermal compensation electric furnace and moves on the bracing frame 12, and thermal compensation electric furnace 11 and mobile bracing frame 12 are separable, removable with directed stove.Its objective is and work as metal melting, and directed stove is in heat tracing during the stage, the heat that loses in air by aluminum heating panel 8 for whole smelting furnace compensation, and when directed stove cools off, can withdraw with mobile bracing frame 12 rapidly again.
Refrigerating module: cooling vessel 15 be installed on thermal compensation electric furnace 11 under, cooling vessel 15 both sides are equipped with cooling water inlet pipe 14 and cooling water outlet pipe 16.Cooling vessel 15, and cooling water outlet pipe 16 is the carrier of the turnover of heat-eliminating medium in the refrigerating module.In order to reach best cooling performance, water-cooled tube connects the formation flow circuit with the externally cooled medium, to guarantee the temperature of heat-eliminating medium in the cooling vessel 15.Cooling water circulationly can control flow rate through water pump.Cooling vessel 15 is placed on the up-down The Cloud Terrace 17, can regulate the height of cooling vessel 15 through adjustment The Cloud Terrace lifting nut 18.
The concrete operations flow process is following: need at first to be ready to the fused solder alloy.Should fully understand each item physical and chemical performance of solder alloy.As: the fusing point of solder alloy.The solder alloy quality that weighing is suitable.Should at first utilize ultrasonic cleaning machine clean metal surface to clean if utilize pure solder alloy piece to carry out melting.Should control the degree of oxidation of metal-powder if adopt solder powder.The directed stove of preheating, as shown in Figure 2, energized is regulated the SV key on the temperature controller 1, and temperature is set, and this design temperature is decided according to concrete melting solder kind, generally is higher than its fusing point and is advisable for above 20 ℃.Push directed stove below to thermal compensation electric furnace-11 simultaneously; Should support jig-13 adjustment thermal compensation electric furnace-11 at the height that moves bracing frame-12 this moment through regulating the thermal compensation electric furnace; Make the distance between thermal compensation electric furnace-11 and the aluminum heating panel-8 be about 5mm, to reach best heats.Guarantee that this distance can not influence platform and push, withdraws from action.Observe PV temperature displayed numerical value on the temperature controller-1 then, when reach set temperature value and stable after, open directed bell-3 and drop into preprepared raw material, and the directed bell-3 that closes rapidly.General lower melting point solder 2min is a melting, also can when solder is shinny and mobile, explain that fusion finishes through opening directed bell-3 Real Time Observation.Prepare cooling then.
Open cooling medium circulation system, guarantee the height of heat-eliminating medium in the cooling vessel-15; Withdraw thermal compensation electric furnace-11 then, electric furnace is withdrawn through moving bracing frame-12; Rotary head lifting nut-18 rises up-down The Cloud Terrace-17, makes heat-eliminating medium submergence aluminum heating panel-8, lets the molten solder cooled and solidified.Take out the ingot casting that solidifies at last.Cut off the power supply of temperature controller-1.The taking-up mode of ingot casting is to open directed furnace fixture-6, removes aluminum heating panel-8 and high-temperature sealing gasket-7, can take out.
Instance: Sn-58wt.%Bi solder directional freeze ingot casting is made.
1, prepares raw material.Raw material is in advance by the melted ingot casting of Sn-58wt.%Bi proportioning. gets 15g, cleans 5min with ultrasonic cleaner.
2, directed stove preheating.Push and open thermal compensation electric furnace-11, opening temperature controller-1 and design temperature is 160 ℃ (fusing point of tin bismuth eutectic solder alloy is 138 ℃).
3, after the PV displayed value stabilizes to 160 ℃ on the temperature controller, drop into solder.
4, open cooling water circulationly, this instance adopts the tap water circulation, and cooling water inlet pipe-16 connects mixture of ice and water, and cooling water outlet pipe-14 inserts bucket.
5, treat the solder fusion after, withdraw thermal compensation electric furnace-11, rotary head lifting nut-18 rises up-down The Cloud Terrace-17, and makes heat-eliminating medium submergence aluminum heating panel-8.
6, cut off temperature controller-1 power supply behind the 30s, open directed furnace fixture-6, remove aluminum heating panel-8 and high-temperature sealing gasket-7, take out ingot casting.
7, the microstructure analysis of ingot casting.Grinding and polishing is carried out in horizontal vertical two cross sections of ingot casting, make metallographic specimen, and through SEM, means such as EBSD are carried out microstructure analysis.
Claims (1)
1.Sn the controlled platform that solidifies of base solder alloy, whole flat can be divided into two modules, heating module and refrigerating module around directional solidification furnace; The heating module of directed stove by Controllable Temperature be connected with temperature controller side direction attemperator and bottom thermal compensation electric furnace two portions constitute, refrigerating module is made up of up-down The Cloud Terrace and cooling water circulation two portions; It is characterized in that:
Heating module: the input terminus of temperature controller (1) inserts thermopair (2), and this thermopair (2) inserts directed burner hearth (5) from the center of directed bell (3), and thermopair (2) is gathered fire box temperature; Temperature controller (1) output terminal connects ring heater (4), and ring heater (4) is a resistive heating device, coats the side of directed burner hearth (5), ring heater (4) stable orientation furnace side surface temperature; Thermopair (2) is gathered directed burner hearth (5) internal temperature in real time, feeds back to temperature controller (1), temperature controller (1) control ring heater (4), thus reach the purpose of stablizing side wall temperatures; Directed burner hearth (5) bottom contacts with aluminum heating panel (8), and there is high-temperature sealing gasket (7) centre, and directed burner hearth (5), elevated-temperature seal sheet (7), aluminum heating panel (8) three combine through the directed furnace fixture (6) at edge; The middle part perforate of aluminum heating panel (8), the top is provided with boss, and boss embeds in the centre hole of elevated-temperature seal sheet (7); Whole directed stove supports jig (9) clamping with directed stove, is fixed on the iron stand (10); Aluminum heating panel (8) below is equipped with thermal compensation electric furnace (11); Thermal compensation electric furnace (11) supports jig (13) clamping through the thermal compensation electric furnace and is fixed on the mobile bracing frame (12); Thermal compensation electric furnace (11) and mobile bracing frame (12) and directed stove are separable, removable;
Refrigerating module: cooling vessel (15) be installed on thermal compensation electric furnace (11) under, cooling vessel (15) both sides are equipped with cooling water inlet pipe (14) and cooling water outlet pipe (16); Cooling vessel (15), and cooling water outlet pipe (16) is the carrier of the turnover of heat-eliminating medium in the refrigerating module; Water-cooled tube connects the formation flow circuit with the externally cooled medium; Cooling water circulationly can control flow rate through water pump; Cooling vessel (15) is placed on the up-down The Cloud Terrace (17), can regulate the height of cooling vessel (15) through adjustment The Cloud Terrace lifting nut (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201534135U CN202175744U (en) | 2011-05-13 | 2011-05-13 | Stannum-based brazing filler metal alloy controllable solidification platform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201534135U CN202175744U (en) | 2011-05-13 | 2011-05-13 | Stannum-based brazing filler metal alloy controllable solidification platform |
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| CN202175744U true CN202175744U (en) | 2012-03-28 |
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| CN2011201534135U Expired - Fee Related CN202175744U (en) | 2011-05-13 | 2011-05-13 | Stannum-based brazing filler metal alloy controllable solidification platform |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104344716A (en) * | 2014-10-11 | 2015-02-11 | 三门峡恒河电气科技有限公司 | Gold-repurchasing smelting furnace and circuit thereof |
| CN104569031B (en) * | 2014-12-26 | 2017-06-13 | 广东工业大学 | For the experimental provision and method of nano-fluid directional solidification |
| CN107790689A (en) * | 2017-10-30 | 2018-03-13 | 中国航发动力股份有限公司 | A kind of water cooled copper plate device and its processing method for improving circulating water effect |
| CN109402730A (en) * | 2018-11-12 | 2019-03-01 | 昆明理工大学 | A kind of equipment of real-time observation directional solidification process |
-
2011
- 2011-05-13 CN CN2011201534135U patent/CN202175744U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104344716A (en) * | 2014-10-11 | 2015-02-11 | 三门峡恒河电气科技有限公司 | Gold-repurchasing smelting furnace and circuit thereof |
| CN104344716B (en) * | 2014-10-11 | 2016-06-08 | 三门峡恒河电气科技有限公司 | A kind of gold repurchase smelting furnace and circuit thereof |
| CN104569031B (en) * | 2014-12-26 | 2017-06-13 | 广东工业大学 | For the experimental provision and method of nano-fluid directional solidification |
| CN107790689A (en) * | 2017-10-30 | 2018-03-13 | 中国航发动力股份有限公司 | A kind of water cooled copper plate device and its processing method for improving circulating water effect |
| CN109402730A (en) * | 2018-11-12 | 2019-03-01 | 昆明理工大学 | A kind of equipment of real-time observation directional solidification process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120328 Termination date: 20150513 |
|
| EXPY | Termination of patent right or utility model |