CN87105076A - Lead-base alloy solder - Google Patents
Lead-base alloy solder Download PDFInfo
- Publication number
- CN87105076A CN87105076A CN87105076.5A CN87105076A CN87105076A CN 87105076 A CN87105076 A CN 87105076A CN 87105076 A CN87105076 A CN 87105076A CN 87105076 A CN87105076 A CN 87105076A
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- lead
- sealing
- soldering
- solder
- alloy
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Abstract
A kind of lead-base alloy solder that is used for communication lead jacket cable joint soldering and sealing, its composition (weight ratio) is: Sn 15～25%, Cd8～17%, Sb0.2～2%, surplus is Pb.This tin content of alloy is low, low price, and processing performance is good, machine-shaping easily.When using this solder soldering and sealing communication lead jacket cable joint, alloy melting point is low, and tin is not dropped down in soldering and sealing, and joint surface is smooth, operation easily, and good moldability, mechanical performance is good, and air-tightness is good.
Description
The invention belongs to the scolder that communication lead jacket cable joint soldering and sealing is used.
At present, the soldering and sealing material of communication lead jacket cable joint adopts the metal scolder usually, and its composition (weight ratio) is: Pb60～65%; Sn35～40%.Use though this alloy is long-term, existing problems are: one, fusing point height (235 ℃), welding difficulty; Two, Lead-tin alloy solidus and liquidus curve interval little (183～235 ℃), good fluidity drops down tin easily during the cable connector sealing-in, form in the sleeve pipe bottom " tin pimple "; Three, Lead-tin alloy crystal grain is thick, and face of weld is coarse; Four, the intensity inductile of the communication lead jacket cable joint of sealing-in is poor; Five, soldering and sealing operating difficulties, gas leakage easily, poor air-tightness; Six, Lead-tin alloy stanniferous amount height, price more expensive (per ton is 3.8 ten thousand yuan), and tin is world's shortage material.In view of the foregoing, usually can not satisfy the performance requirement of communication lead jacket cable joint soldering and sealing with the Lead-tin alloy scolder.
The object of the present invention is to provide that low, the liquid-solid phase line temperature difference of a kind of fusing point is big, viscous merges during the soldering and sealing operation, does not drop down tin, intensity is higher after the moulding, air-tightness is good, the soldering and sealing material of low-cost communication lead jacket cable joint.
Lead-base alloy solder of the present invention, its composition (weight ratio) is: Sn15～25%; Cd8～17%; Sb0.2～2%; Surplus is Pb, and each forms summation is 100%.
Lead-base alloy solder founding of the present invention is simple, adopts common electric furnace, clay-graphite crucible or the melting of iron crucible, and iron mould casting gets final product.Adopt technical pure (or high-purity) lead, tin, cadmium, antimony as alloy materials.Earlier lead, antimony raw material are added in the crucible during melting, cover dry charcoal above, be warmed up to 600 ℃, after treating all to melt, add tin, temperature drops to 380 ℃ and adds cadmium, and fusing is through fully stirring, refining, temperature is reduced to 300～340 ℃, after the slagging-off, is cast into ingot in the swage of oven dry.
Solder of the present invention is processed easily, can make the ingot casting of different shape or be processed into various forms of scolders as required.
The embodiment of solder of the present invention prepares burden 10 kilograms, and its composition (weight ratio) is:
Sn20%, 2 kilograms; Cd10%, 1 kilogram; Sb0.8%, 0.08 kilogram; The Pb surplus, 6.92 kilograms; Each forms summation is 100%, totally 10 kilograms.
Earlier confected materials, the antimony of 6.92 kilograms lead and 0.08 kilogram is put into clay-graphite crucible, is covered with charcoal above, and crucible is placed crucible furnace energising heating, use the thermocouple thermometric, and when temperature reached 600 ℃, plumbous, antimony melted and finishes.Add tin, temperature drops to 380 ℃.Add cadmium fusing, fully stir, refining 5 minutes, temperature drops to 340 ℃, pulls down slag, casts in 4 centimetres of upper bases of row of oven dry, go to the bottom 8 centimetres, the pig mold of high 3 centimetres of trapezoid cross sections, and cool to room temperature takes out the cast alloy scolder.
Accompanying drawing 1 is the cooling curve of solder of the present invention.
Accompanying drawing 2 is metallographs of alloy of the present invention.
The characteristics of solder of the present invention are that alloy melting point is low, and liquid-solid phase line temperature is interval big. Upper fusing point is 227 ℃, and lower fusing point is 146 ℃, and the liquid-solid phase line temperature difference is 81 ℃ (seeing accompanying drawing 1). And the terne metal of former usefulness is 52 ℃. Alloy melting point of the present invention has reduced by 8 ℃, The temperature interval of fusing point has increased 29 ℃ up and down. Like this, when welding communication jacketed cable joint, solder of the present invention increases greatly than former solid liquid phase ratio with plumber's solder, so do not drop down tin.
Alloy of the present invention has small grains (seeing accompanying drawing 2). So that smooth at the molded surface of the soldering and sealing of communication lead jacket cable joint, processing ease does not leak gas, and good seal performance has improved the quality of communication cable joint soldering and sealing.
The Application standard of solder of the present invention and former scolder relatively, the result shows that the mechanical index of solder of the present invention has not only reached the Application standard requirement, and is better than the former wiping solder of using, relatively the seeing the following form of the mechanical performance of scolder.
| Tensile strength, MPa | Percentage elongation, % | |
| Communication cable joint soldering and sealing is surveyed with the former scolder actual measurement of scolder standard solder of the present invention | ≥28 29.1 33.6 | ≥5 6.6 30.5 |
Solder of the present invention is saved tin 20%(weight ratio than former with wiping solder) about, scolder cost per ton descends 30%, is about 5000 yuan.
Claims (2)
1, a kind of scolder lead-containing alloy is characterized in that composition (weight ratio) is: Sn15～25%, and Cd8～17%, Sb0.2～2%, surplus is Pb, each forms summation is 100%.
2, by the described solder alloy of claim 1, it is characterized in that being used as the soldering and sealing of communication lead jacket cable joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87105076 CN1009178B (en) | 1987-09-02 | 1987-09-02 | Lead-base alloy solder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87105076 CN1009178B (en) | 1987-09-02 | 1987-09-02 | Lead-base alloy solder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87105076A true CN87105076A (en) | 1988-03-09 |
| CN1009178B CN1009178B (en) | 1990-08-15 |
Family
ID=4815165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87105076 Expired CN1009178B (en) | 1987-09-02 | 1987-09-02 | Lead-base alloy solder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1009178B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055881C (en) * | 1997-12-12 | 2000-08-30 | 北京有色金属研究总院 | Lead-base alloy powder used as solder for welding microphone head and its preparation process |
| CN104518446A (en) * | 2013-09-30 | 2015-04-15 | 中铁六局集团有限公司 | Railway communication cable construction method |
| CN104511699A (en) * | 2013-09-29 | 2015-04-15 | 温兴乐 | Low-lead solder |
-
1987
- 1987-09-02 CN CN 87105076 patent/CN1009178B/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055881C (en) * | 1997-12-12 | 2000-08-30 | 北京有色金属研究总院 | Lead-base alloy powder used as solder for welding microphone head and its preparation process |
| CN104511699A (en) * | 2013-09-29 | 2015-04-15 | 温兴乐 | Low-lead solder |
| CN104518446A (en) * | 2013-09-30 | 2015-04-15 | 中铁六局集团有限公司 | Railway communication cable construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1009178B (en) | 1990-08-15 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| C14 | Grant of patent or utility model | ||
| C19 | Lapse of patent right due to non-payment of the annual fee |