CN117961061A - Forming method of gold-tin alloy Au80Sn20 welding ring - Google Patents
Forming method of gold-tin alloy Au80Sn20 welding ring Download PDFInfo
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- CN117961061A CN117961061A CN202410313168.1A CN202410313168A CN117961061A CN 117961061 A CN117961061 A CN 117961061A CN 202410313168 A CN202410313168 A CN 202410313168A CN 117961061 A CN117961061 A CN 117961061A
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- China
- Prior art keywords
- gold
- tin alloy
- powder
- forming
- au80sn20
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- JVPLOXQKFGYFMN-UHFFFAOYSA-N gold tin Chemical compound [Sn].[Au] JVPLOXQKFGYFMN-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 229910001128 Sn alloy Inorganic materials 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000003466 welding Methods 0.000 title claims abstract description 39
- 229910000679 solder Inorganic materials 0.000 claims abstract description 16
- 238000004663 powder metallurgy Methods 0.000 claims abstract description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 35
- 239000000843 powder Substances 0.000 claims description 32
- 238000003825 pressing Methods 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 5
- 239000010963 304 stainless steel Substances 0.000 claims description 3
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 3
- 238000009991 scouring Methods 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 3
- 238000005245 sintering Methods 0.000 abstract description 6
- 238000002844 melting Methods 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 17
- 230000007547 defect Effects 0.000 description 8
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 229910001020 Au alloy Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
- B22F5/106—Tube or ring forms
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention discloses a forming method of a gold-tin alloy Au80Sn20 welding ring, and relates to the technical field of aviation plug-in solder processing. The forming method of the gold-tin alloy Au80Sn20 welding ring comprises three steps of equipment preparation, tin powder feeding and forming treatment. The forming method is used for processing the gold-tin alloy Au80Sn20 welding ring without being limited by the thickness-width ratio, the finished product is complete, has no cracks and no edge breakage, avoids the possibility of loss caused by solder falling onto a client chip due to the crack edge breakage, and particularly avoids the aspect that the soldier chip is especially seen, the finished product does not need to be subjected to a conventional powder metallurgy sintering process, and the welding is heated to be higher than the melting point when the client uses the welding ring, and the sintering process and the welding process when the client uses the welding ring are combined into one step.
Description
Technical Field
The invention relates to the technical field of aviation plug-in solder processing, in particular to a forming method of a gold-tin alloy Au80Sn20 solder ring.
Background
Gold-tin solder Au80Sn20 has long history of use in the fields of airtight packaging, chip packaging and the like because of the advantages of excellent tensile strength, strong corrosion resistance, low vapor pressure, good fluidity, wettability and the like.
In some application scenes, gold-tin solder is required to be processed into a circular ring and a waist-shaped ring, so that the space between the Pin needle and the through hole on the side wall of the cavity body or the welding and air sealing of the tube shell and the inner core in the connector are realized. The application scene generally needs that the narrower the edge width of the welding ring is, the better the thickness of the welding ring is, and the thicker the welding ring is; the narrower the edge width is, the less noble metal solder is used for the welding ring, and the lower the material cost is; the thicker the thickness, the better the airtight effect, but the use requirement and the processing difficulty are inversely proportional, and the thickness-to-width ratio (thickness/side width) is generally used in the industry to evaluate the difficulty of processing and forming.
The conventional processing and forming mode is stamping, but because the gold-tin alloy is relatively brittle, the larger the thickness-to-width ratio is, the more easily cracks are generated in the stamping process, even the whole edge is broken, the defects are extremely easy to generate after the thickness-to-width ratio is larger than 1.5 according to common experience, so that the gold-tin alloy welding ring with the thickness-to-width ratio larger than 2 cannot be realized by using the conventional stamping mode, a plurality of defects are generated when the welding ring with the thickness-to-width ratio larger is produced by using the conventional stamping mode, the first stamping process hopes that the material is of a fixed width, and the continuous processing is convenient, but when the gold-tin alloy is used as a relatively brittle material, the gold-tin alloy is broken when the thickness exceeds 0.2mm, the parameter cracks and even the brittle breakage are generated during the splitting, so that the defects are not easily met; the second is the most critical, the stamping is a shearing process, in which the material is deformed, the normal and natural collapse angle of the conventional ductile material forms a round angle, the integrity of a welding ring is maintained, the gold-tin alloy is brittle, the ductility is insufficient, tearing can occur in the deformation process, even the whole is brittle and scrapped, the defect is extremely easy to occur after the thickness-width ratio is larger than 1.5, so that the gold-tin alloy welding ring with the thickness-width ratio larger than 2 cannot be realized by the conventional stamping mode; the third material utilization rate is low, the gold-tin alloy contains 80% gold, the higher the material utilization rate is, the better the material utilization rate is, but the larger the thickness-width ratio is, the lower the ratio of the weight of the finished product to the weight of the raw material is, and therefore, the more cost is increased.
Under the premise, a novel forming mode is invented to process the gold-tin alloy welding ring with larger thickness-to-width ratio.
Disclosure of Invention
The invention aims to provide a forming method of a gold-tin alloy Au80Sn20 solder ring, which aims to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: a forming method of a gold-tin alloy Au80Sn20 welding ring comprises the following steps:
s1, equipment preparation: firstly, placing a heat insulation backing plate on a platform of a press; secondly, placing a heating plate on the cushion block, processing through holes with the diameter of 8mm and M6 blind holes on the heating plate, and respectively placing The stainless steel heating pipe and the K-type temperature probe of M6 are connected to a temperature control instrument to form a heating system; thirdly, placing a powder metallurgy forming die above the heating block, and setting the temperature of the heating plate to be 110 ℃;
s2, feeding tin powder: firstly, weighing gold-tin powder with a certain weight by using a high-precision electronic scale, adding a cavity from a groove of a die, and uniformly adding the gold-tin powder on a circle of a circular ring as much as possible; secondly, placing a forming die filled with gold-tin alloy powder on an ultrasonic vibration table, and vibrating the powder in a die cavity to a flat and compact state through ultrasonic vibration;
S3, molding treatment: firstly, placing a forming die on a heating plate, waiting for 120 seconds, heating the powder to increase the ductility of the powder, and preventing the gold-tin alloy powder from being oxidized at 110 ℃;
Secondly, starting a pneumatic press, wherein a sliding block of the pneumatic press is pressed down, and the gold-tin alloy powder in the cavity is compacted under huge pressure to form a circular ring with a required size; and thirdly, taking the die off the equipment, and taking out the circular ring to finish the production of the gold-tin alloy welding ring with larger thickness-width ratio.
Preferably, the heat insulation backing plate in the S1 is made of 06Cr19Ni9, namely 304 stainless steel.
Preferably, the heating plate in S1 is made of SKS 5.
Preferably, the forming die in the step S2 consists of a base, a core piece, a surrounding frame and a pressing block, and the forming die is required to be cleaned by ultrasonic cleaning equipment before being used and is subjected to wiping treatment by using clean scouring pad.
Preferably, the particle size of the gold-tin alloy powder in S2 is 45-75 μm or 25-45 μm.
Preferably, the pressure in S3 needs to be maintained for 20 seconds after the press is pressed down.
Preferably, the parameters of the pneumatic press in the step S1 are three plates and four columns, and the pressure of the pneumatic press is 4 tons or more.
Drawings
FIG. 1 is a schematic illustration of a process flow of the present invention;
FIG. 2 is a schematic view of the process equipment of the present invention.
Advantageous effects
Compared with the prior art, the invention provides a forming method of a gold-tin alloy Au80Sn20 welding ring, which has the following beneficial effects:
The forming method of the gold-tin alloy Au80Sn20 welding ring is used for processing the gold-tin alloy Au80Sn20 welding ring without being limited by the thickness-width ratio, the finished product is complete and free of cracks and edge breakage, the possibility of loss caused by solder falling onto a client chip due to crack edge breakage is avoided, particularly, the aspect of military chips is particularly seen, the finished product does not need to be subjected to a conventional powder metallurgy sintering process, the welding material is heated to a melting point or higher when the client is in use, the sintering process and the welding process when the client is in use are combined into one step, the method can not only form a circular ring, but also realize a waist-shaped ring (runway ring), and the method has advantages over the conventional punching processing even on welding pieces with the thickness of more than 0.5 mm.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-2, the present invention provides a technical solution: a forming method of a gold-tin alloy Au80Sn20 welding ring comprises the following steps:
s1, equipment preparation: firstly, placing a heat insulation backing plate on a platform of a press; secondly, placing a heating plate on the cushion block, processing through holes with the diameter of 8mm and M6 blind holes on the heating plate, and respectively placing The stainless steel heating pipe and the K-type temperature probe of M6 are connected to a temperature control instrument to form a heating system; thirdly, placing a powder metallurgy forming die above the heating block, setting the temperature of the heating plate to be 110 ℃, wherein the parameters of a pneumatic press in S1 are three plates and four columns, the perpendicularity and the flatness are guaranteed, the pressure of the pneumatic press is 4 tons or more, the heat insulation backing plate in S1 is made of 06Cr19Ni9, namely common 304 stainless steel, the heat insulation backing plate is high in Cr content ratio, poor in heat conducting performance and hard in texture, the heating plate in S1 is made of SKS5, and the position of SKS5 is resistant to temperature, is not easy to rust and is high in hardness;
S2, feeding tin powder: firstly, weighing gold-tin powder with a certain weight by using a high-precision electronic scale, adding a cavity from a groove of a die, and uniformly adding the gold-tin powder on a circle of a circular ring as much as possible; secondly, placing a forming die filled with gold-tin alloy powder on an ultrasonic vibration table, vibrating the powder in a die cavity to a flat and compact state through ultrasonic vibration, wherein the forming die in S2 consists of a base, a core piece, a surrounding frame and a pressing block, cleaning the forming die by using ultrasonic cleaning equipment before use, and wiping the forming die by using clean scouring pad, wherein the particle size of the gold-tin alloy powder in S2 is 45-75 mu m or 25-45 mu m;
S3, molding treatment: firstly, placing a forming die on a heating plate, waiting for 120 seconds, heating the powder to increase the ductility of the powder, and preventing the gold-tin alloy powder from being oxidized at 110 ℃; secondly, starting a pneumatic press, wherein a sliding block of the pneumatic press is pressed down, and the gold-tin alloy powder in the cavity is compacted under huge pressure to form a circular ring with a required size; thirdly, taking the die off the equipment, taking out the circular ring, and finishing the production of the gold-tin alloy welding ring with the large thickness-width ratio, wherein the pressure is maintained for 20 seconds after the press in S3 presses down, and the method comprises the following steps of: when the outer diameter is manufactured Inner diameter/>Firstly, manufacturing a corresponding forming die, ultrasonically cleaning and then assembling the forming die to obtain a gold-tin alloy Au80Sn20 ring with the thickness of 0.4mm, wherein the mass M1=0.0175 g of a single ring can be obtained according to calculation; secondly, weighing 0.0175g No. 2 gold tin Au80Sn20 powder on a high-precision electronic scale; pouring the powder into a forming die uniformly, placing the forming die on an ultrasonic vibration table, vibrating for 30S, heating a heating plate to 110 ℃, placing the forming die filled with the powder on the heating table, placing a pressing block on the heating table, waiting for 120S, pressing a press switch, pressing the press down and maintaining the pressure for 20S, taking out the forming die, and taking out the manufactured circular ring to obtain a product required by us; specific embodiment II: manufacturing a waist-shaped ring (runway ring) with the length of 20mm, the width of 5mm, the edge width of 0.25mm and the thickness of 0.5mm, firstly, manufacturing a corresponding forming die, ultrasonically cleaning the forming die, and then assembling the forming die to obtain the mass M2= 0.0815g of a single circular ring according to calculation; weighing 0.0815g of No. 3 gold tin Au80Sn20 powder on a high-precision electronic scale; uniformly pouring the mixture into a forming die; thirdly, placing the forming die on an ultrasonic vibration table, vibrating for 30S, heating a heating plate to 110 ℃, placing the forming die filled with powder on the heating table, placing a pressing block on the heating table, waiting for 120S, pressing a press switch, pressing the press down and maintaining the pressure for 20S, taking out the forming die, and taking out the manufactured circular ring to obtain the product required by us.
It can be seen from this: the conventional processing and forming mode is stamping, but because the gold-tin alloy is relatively brittle, the larger the thickness-to-width ratio is, the more easily cracks are generated in the stamping process, even the whole edge is broken, the defects are extremely easy to generate after the thickness-to-width ratio is larger than 1.5 according to common experience, so that the gold-tin alloy welding ring with the thickness-to-width ratio larger than 2 cannot be realized by using the conventional stamping mode, a plurality of defects are generated when the welding ring with the thickness-to-width ratio larger is produced by using the conventional stamping mode, the first stamping process hopes that the material is of a fixed width, and the continuous processing is convenient, but when the gold-tin alloy is used as a relatively brittle material, the gold-tin alloy is broken when the thickness exceeds 0.2mm, the parameter cracks and even the brittle breakage are generated during the splitting, so that the defects are not easily met; the second is the most critical, the stamping is a shearing process, in which the material is deformed, the normal and natural collapse angle of the conventional ductile material forms a round angle, the integrity of a welding ring is maintained, the gold-tin alloy is brittle, the ductility is insufficient, tearing can occur in the deformation process, even the whole is brittle and scrapped, the defect is extremely easy to occur after the thickness-width ratio is larger than 1.5, so that the gold-tin alloy welding ring with the thickness-width ratio larger than 2 cannot be realized by the conventional stamping mode; the third material utilization rate is low, gold and tin alloy contains 80% gold, the higher the material utilization rate is, the better the material utilization rate is, but the larger the thickness-width ratio is, the lower the ratio of the weight of a finished product to the weight of a raw material is, the more cost is increased, the forming method is used for processing the gold and tin alloy Au80Sn20 welding ring without being limited by the thickness-width ratio, the finished product is complete and has no crack and no edge breakage, the possibility of loss caused by solder falling onto a client chip due to crack edge breakage is avoided, particularly in the aspect of the military chip, the manufactured finished product does not need to be subjected to a conventional powder metallurgy sintering process, because the welding material is heated to be higher than the melting point when the client uses, the sintering process and the welding process when the client uses are combined into one step, the method can not only form the circular ring, but also realize the waist-shaped ring (runway ring), and the welding piece with the thickness of more than 0.5mm is more advantageous than the conventional stamping processing.
Claims (7)
1. A forming method of a gold-tin alloy Au80Sn20 welding ring is characterized by comprising the following steps: the method comprises the following steps:
s1, equipment preparation: firstly, placing a heat insulation backing plate on a platform of a press; secondly, placing a heating plate on the cushion block, processing through holes with the diameter of 8mm and M6 blind holes on the heating plate, and respectively placing The stainless steel heating pipe and the K-type temperature probe of M6 are connected to a temperature control instrument to form a heating system; thirdly, placing a powder metallurgy forming die above the heating block, and setting the temperature of the heating plate to be 110 ℃;
s2, feeding tin powder: firstly, weighing gold-tin powder with a certain weight by using a high-precision electronic scale, adding a cavity from a groove of a die, and uniformly adding the gold-tin powder on a circle of a circular ring as much as possible; secondly, placing a forming die filled with gold-tin alloy powder on an ultrasonic vibration table, and vibrating the powder in a die cavity to a flat and compact state through ultrasonic vibration;
S3, molding treatment: firstly, placing a forming die on a heating plate, waiting for 120 seconds, heating the powder to increase the ductility of the powder, and preventing the gold-tin alloy powder from being oxidized at 110 ℃; secondly, starting a pneumatic press, wherein a sliding block of the pneumatic press is pressed down, and the gold-tin alloy powder in the cavity is compacted under huge pressure to form a circular ring with a required size; and thirdly, taking the die off the equipment, and taking out the circular ring to finish the production of the gold-tin alloy welding ring with larger thickness-width ratio.
2. The method for forming the Au80Sn20 solder ring of the gold-tin alloy according to claim 1, wherein the method comprises the following steps: the heat insulation backing plate in the S1 is made of 06Cr19Ni9, namely 304 stainless steel.
3. The method for forming the Au80Sn20 solder ring of the gold-tin alloy according to claim 2, wherein the method comprises the following steps: the heating plate in the step S1 is made of SKS 5.
4. A method for forming a Au80Sn20 solder ring of a gold-tin alloy according to claim 3, wherein: the forming die in the step S2 consists of a base, a core piece, a surrounding frame and a pressing block, wherein the forming die is required to be cleaned by ultrasonic cleaning equipment before being used, and is subjected to wiping treatment by using clean scouring pad.
5. The method for forming the Au80Sn20 solder ring of the gold-tin alloy according to claim 4, wherein the method comprises the following steps: the grain diameter of the gold-tin alloy powder in the S2 is 45-75 mu m or 25-45 mu m.
6. The method for forming the Au80Sn20 solder ring of the gold-tin alloy according to claim 5, wherein the method comprises the following steps: the pressure in the step S3 needs to be maintained for 20 seconds after the pressing down of the press.
7. The method for forming the Au80Sn20 solder ring of the gold-tin alloy according to claim 6, wherein the method comprises the following steps: and the parameters of the pneumatic press in the step S1 are three plates and four columns, and the pressure of the pneumatic press is selected to be 4 tons or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410313168.1A CN117961061A (en) | 2024-03-19 | 2024-03-19 | Forming method of gold-tin alloy Au80Sn20 welding ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410313168.1A CN117961061A (en) | 2024-03-19 | 2024-03-19 | Forming method of gold-tin alloy Au80Sn20 welding ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117961061A true CN117961061A (en) | 2024-05-03 |
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ID=90859648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410313168.1A Pending CN117961061A (en) | 2024-03-19 | 2024-03-19 | Forming method of gold-tin alloy Au80Sn20 welding ring |
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| Country | Link |
|---|---|
| CN (1) | CN117961061A (en) |
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- 2024-03-19 CN CN202410313168.1A patent/CN117961061A/en active Pending
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