DE891484C - Method for soldering metal parts by immersion in a molten salt bath - Google Patents
Method for soldering metal parts by immersion in a molten salt bathInfo
- Publication number
- DE891484C DE891484C DES7544D DES0007544D DE891484C DE 891484 C DE891484 C DE 891484C DE S7544 D DES7544 D DE S7544D DE S0007544 D DES0007544 D DE S0007544D DE 891484 C DE891484 C DE 891484C
- Authority
- DE
- Germany
- Prior art keywords
- immersion
- molten salt
- salt bath
- metal parts
- soldering metal
- 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.)
- Expired
Links
- 238000007654 immersion Methods 0.000 title claims description 5
- 238000000034 method Methods 0.000 title claims description 4
- 150000003839 salts Chemical class 0.000 title claims description 4
- 229910052751 metal Inorganic materials 0.000 title claims description 3
- 239000002184 metal Substances 0.000 title claims description 3
- 238000005476 soldering Methods 0.000 title claims description 3
- 239000000155 melt Substances 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 239000000571 coke Substances 0.000 claims description 4
- 230000001603 reducing effect Effects 0.000 claims description 4
- 239000005997 Calcium carbide Substances 0.000 claims description 2
- 150000001247 metal acetylides Chemical class 0.000 claims description 2
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 claims description 2
- 230000010287 polarization Effects 0.000 claims 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000002999 depolarising effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000028161 membrane depolarization Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0002—Soldering by means of dipping in a fused salt bath
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K23/00—Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Description
Verfahren zum Löten von Metallteilen durch Eintauchen in ein Salzschmelzbad Es ist bereits ein Verfahren vorgeschlagen worden, bei dem die zu lötenden Teile in ein Salzschmelzbad eingetaucht werden und außerdem während des Eintauchens ein Gleichstrom durch Bad und Werkstück geleitet wird, derart, daß das Werkstück kathodisch polarisiert wird. Bei der praktischen Durchführung hat es sich aber ergeben, daß der anodisch entstehende Sauerstoff sowie der vom Schmelzbad aus der Luft aufgenommene Sauerstoff bis zu einem gewissen Grade störend wirken können. Es ist deshalb eine Ausschaltung des Sauerstoffes, insbesondere der 02 Entwicklung, durch Depolarisationsmittel zweckmäßig. In einfacher Weise kann dies erfindungsgemäß erreicht . werden, indem man in die Schmelze ein zusätzliches starkes Reduktionsmittel, dessen reduzierende Wirkung durch die Schmelze ausgelöst wird, einbringt. Das Reduktionsmittel wird möglichst am Boden der Schmelze angeordnet.Method of soldering metal parts by immersion in a molten salt bath A method has already been proposed in which the parts to be soldered be immersed in a molten salt bath and also immersed during the immersion Direct current is passed through the bath and workpiece, so that the workpiece is cathodic being polarized. In practical implementation, however, it has been found that the anodic oxygen as well as the oxygen absorbed from the air by the weld pool Oxygen can have a disruptive effect to a certain extent. It is therefore one Elimination of oxygen, especially the development of O2, by means of depolarization agents expedient. This can be achieved according to the invention in a simple manner. be by one in the melt an additional strong reducing agent, its reducing Effect triggered by the melt, brings in. The reducing agent will if possible arranged at the bottom of the melt.
Besonders hat sich bei der Verwendung einer Natriumcarbonatschmelze Kohlenstoff als zusätzliches Reduktionsmittel bewährt. Der Kohlenstoff wird in Form von Koks oder auch als Karbide, wie Calciumkarbid, eingebracht. Er reagiert mit der Natriumcarbonatschmelze nach folgender Gleichung: Na, C03+2C=Na2+3C0. Das entstehende Natriummetall wirkt außerordentlich stark reduzierend und depolarisierend. Auch kleine Mengen von Sauerstoff werden sofort unter Bildung von Natriümoxyd entfernt, das Kohlenoxyd entweicht und bewirkt eine durchaus erwünschte vorzügliche Durchrührung des Bades. Sobald das Kohlenoxyd durch die Badoberfläche an die freie Luft tritt, entzündet es sich und verbrennt zu Kohlenoxyd, da die Schmelze ja eine Temperatur von etwa goo° aufweist.It has proven particularly useful when using a sodium carbonate melt Carbon has proven its worth as an additional reducing agent. The carbon is in shape introduced by coke or as carbides such as calcium carbide. He reacts with the sodium carbonate melt according to the following equation: Na, C03 + 2C = Na2 + 3C0. That The resulting sodium metal has an extremely strong reducing and depolarizing effect. Even small amounts of oxygen are removed immediately with the formation of sodium oxide, the carbon dioxide escapes and produces an excellent stirring which is quite desirable of the bathroom. As soon as the carbon dioxide passes through the surface of the bath into the open air, it ignites and burns to carbon oxide, since the melt has a temperature of about goo °.
Das Einbringen des Kokses kann beispielsweise so erfolgen, daß der Koks in einen kleinen gelochten Korb aus Eisen gefüllt wird, der nach oben geschlossen und nach unten offen ist. Dieser Korb wird auf den Boden des Gefäßes gebracht, so daß das entwickelte Natrium und das Kohlenoxyd von unten durch die Schmelze hochsteigen können und diese in ihrer gesamten Höhe der reduzierenden Wirkung ausgesetzt wird.The introduction of the coke can be done, for example, so that the Coke is filled into a small perforated iron basket that is closed at the top and is open at the bottom. This basket is brought to the bottom of the jar, like this that the evolved sodium and the carbon monoxide rise from below through the melt and this is exposed to the reducing effect in its entirety.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES7544D DE891484C (en) | 1940-11-06 | 1941-11-29 | Method for soldering metal parts by immersion in a molten salt bath |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE226723X | 1940-11-06 | ||
| DES7544D DE891484C (en) | 1940-11-06 | 1941-11-29 | Method for soldering metal parts by immersion in a molten salt bath |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE891484C true DE891484C (en) | 1953-09-28 |
Family
ID=25764348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DES7544D Expired DE891484C (en) | 1940-11-06 | 1941-11-29 | Method for soldering metal parts by immersion in a molten salt bath |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE891484C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0493959A1 (en) * | 1990-12-28 | 1992-07-08 | Kanto Yakin Kogyo Kabushiki Kaisha | Brazing baths for aluminium articles |
-
1941
- 1941-11-29 DE DES7544D patent/DE891484C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0493959A1 (en) * | 1990-12-28 | 1992-07-08 | Kanto Yakin Kogyo Kabushiki Kaisha | Brazing baths for aluminium articles |
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