DE665005C - Solder for metal parts of vacuum vessels, especially electric light bulbs, discharge lamps and mercury vapor rectifiers - Google Patents
Solder for metal parts of vacuum vessels, especially electric light bulbs, discharge lamps and mercury vapor rectifiersInfo
- Publication number
- DE665005C DE665005C DEP74682D DEP0074682D DE665005C DE 665005 C DE665005 C DE 665005C DE P74682 D DEP74682 D DE P74682D DE P0074682 D DEP0074682 D DE P0074682D DE 665005 C DE665005 C DE 665005C
- Authority
- DE
- Germany
- Prior art keywords
- solder
- metal parts
- discharge lamps
- electric light
- light bulbs
- 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
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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
Bur.Bur.
19 JCT. 193819 JCT. 1938
AUSGEGEBEN AM
10. SEPTEMBER 1938ISSUED ON
SEPTEMBER 10, 1938
Beim Herstellen der Elektroden von elektrischen Vakuumgefäßen, insbesondere elektrischen Glühlampen, Entladungslampen und Quecksilberdampfgleichrichtern, ist es oft notwendig, verschiedene Metallteile zu einem mechanisch festen Teil zusammenzufügen, wobei mitunter zwischen den Einzelteilen ein guter Wärmeübergang möglich sein muß. Am einfachsten lassen sich derartige Verbindungen durch Löten herstellen. Besonders bei Elektrodenteilen für hohe Spannungen muß dabei auf äußerste Sauberkeit und Vermeidung von Oxydation geachtet werden. Dies gilt besonders dann, wenn die die Elektroden-When producing the electrodes of electrical vacuum vessels, especially electrical ones Incandescent lamps, discharge lamps and mercury vapor rectifiers, it is often necessary to combine different metal parts into one mechanically solid part to assemble, sometimes between the individual parts good heat transfer must be possible. Such connections are the easiest manufacture by soldering. Particularly in the case of electrode parts for high voltages, extreme cleanliness and avoidance must be ensured Beware of oxidation. This is especially true when the electrode
■5 teile aufnehmenden Gefäße keinen Fangstoff enthalten. Man lötet daher vorzugsweise im Vakuum. Um die Metallteile möglichst vollkommen zu entgasen, werden alle Metallteile nach dem Einschmelzen in die Röhre im Vakuum sehr hoch erhitzt. Hierzu werden die .Metallteile so ausgewählt, daß keine Metalle durch Verdampfen auf anderen Teilen oder an den Isolierwänden niedergeschlagen werden. Bei den bisher üblichen Loten, entweder reinen Metallen oder Legierungen, bestand der Nachteil, daß diese Stoffe beim Erhitzen im Hochvakuum teilweise bis über ihren Schmelzpunkt hinaus erheblich verdampften. So werden z. B. Teile aus Eisen, Nickeleisen, Molybdän o. dgl. mittels Silbers, Kupfers oder Kupfer-Silber-Legierungen gelötet. Beim Er- hitzen im Hochvakuum bis in die Nähe des Schmelzpunktes der Elektrodenmetalle, z. B. des Eisens, wobei das Lot schmilzt, die Teile jedoch durch ihre Form und Lage zusammengehalten werden, haben die Lote eine so hohe Verdampfungsgeschwindigkeit, daß sich schnell starke Beschläge von Kupfer, Silber usw. auf der Gefäßwand bilden.■ 5-part receptacles do not contain any catching material contain. It is therefore preferable to solder in Vacuum. In order to degas the metal parts as completely as possible, all metal parts are after melting in the tube, heated very high in a vacuum. For this purpose, the .Metal parts selected so that no metals evaporate on other parts or be knocked down on the insulating walls. With the plumb bobs that have been used up to now, either pure metals or alloys, there was the disadvantage that these substances when heated partially evaporated considerably in a high vacuum to above their melting point. So z. B. parts made of iron, nickel iron, molybdenum o. The like. Using silver, copper or Soldered copper-silver alloys. When heated in a high vacuum up to the vicinity of the Melting point of the electrode metals, e.g. B. iron, where the solder melts, the parts However, held together by their shape and position, the plumb bobs have such a high level Evaporation rate that quickly builds strong deposits of copper, silver etc. form on the vessel wall.
Auch Verlötungen mit Zirkon, einem Metall, das an sich einen geringen Dampfdruck aufweist, konnten nicht befriedigen, da beiAlso soldering with zirconium, a metal that in itself has a low vapor pressure has, could not satisfy, since at
dem sehr hohen Schmelzpunkt dieses Metalles bereits eine merkbare Verdampfungsgeschwindigkeit vorhanden ist und da das Metall unter Ausbildung einer Legierung mit den zu verlötenden Metallen an den zu verlötenden Körpern entlang läuft.The very high melting point of this metal already has a noticeable rate of evaporation is present and since the metal forms an alloy with the to soldering metals runs along the bodies to be soldered.
Nach der Erfindung wird zum Verlöten von Metallteilen für Väkuumgefäße aller Art, insbesondere elektrische Glühlampen, Entladungslampen und Quecksilberdampfgleichrichter, als Lot eine eutektische Legierung von Metallen der Eisengruppe mit Tantal benutzt. .According to the invention, for soldering metal parts for vacuum vessels of all kinds, in particular electric incandescent lamps, discharge lamps and mercury vapor rectifiers, a eutectic alloy of metals of the iron group with tantalum is used as solder. .
Für eine Löttemperatur von 14000 C hat sich eine Eisen-Tantal-Legierung mit ungefähr 40% Tantal bewährt. Für 13700 C ist eine Nickel-Tantal-Legierung mit 380/0 Tantal geeignet. Außerdem kann noch eine Legierung von 40% Nickel und 60 °/o Tantal mit einem Schmelzpunkt von 14000 C benutzt werden.For a soldering temperature of 1400 ° C., an iron-tantalum alloy with approximately 40% tantalum has proven itself. For 1370 0 C, a nickel-tantalum alloy is suitable with 380/0 tantalum. Moreover, even an alloy of 40% nickel and 60 ° / o tantalum can be used with a melting point of 1400 0 C.
Die Lotlegierungen nach der Erfindung sind spröde und schwer zu bearbeiten. Während man z. B. Kupfer im allgemeinen in .Form von Drahtringen o. dgl. zum Löten benutzt, ist es bei der Erfindung vorteilhafter, die fertige Legierung zu pulvern oder fein zu zerstoßen, was wegen der erwähnten Sprödigkeit leicht möglich ist. Man fertigt dann mittels leicht verdampfender Flüssigkeiten, z. B. Alkohols oder gereinigten Petroleums, eine Paste an, die in Rillen oder Vertiefungen der zu lötenden Teile angebracht wird. Beim Erhitzen verdampft das Pastenmittel. Das zurückbleibende Pulver schmilzt und bewirkt die Lötung. ' The solder alloys according to the invention are brittle and difficult to work with. While one z. B. Copper generally in .Form of wire rings o. The like. Used for soldering, it is more advantageous in the invention to powder or finely crush the finished alloy, which is easily possible because of the brittleness mentioned. One then manufactures by means of easily evaporating liquids such. B. alcohol or purified petroleum, a paste that is placed in grooves or depressions of the parts to be soldered. The paste evaporates when heated. The remaining powder melts and causes the soldering. '
Die Erfindung läßt sich nicht nur zum Verlöten von Metallteilen elektrischer Vakuumgefäße, sondern auch anderer Vakuumgefäße, beispielsweise Versandbehältern für Edelgase, verwenden.The invention can be used not only for soldering metal parts of electrical vacuum vessels, but also other vacuum vessels, for example shipping containers for noble gases, use.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP74682D DE665005C (en) | 1937-02-03 | 1937-02-03 | Solder for metal parts of vacuum vessels, especially electric light bulbs, discharge lamps and mercury vapor rectifiers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP74682D DE665005C (en) | 1937-02-03 | 1937-02-03 | Solder for metal parts of vacuum vessels, especially electric light bulbs, discharge lamps and mercury vapor rectifiers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE665005C true DE665005C (en) | 1938-09-10 |
Family
ID=7392598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEP74682D Expired DE665005C (en) | 1937-02-03 | 1937-02-03 | Solder for metal parts of vacuum vessels, especially electric light bulbs, discharge lamps and mercury vapor rectifiers |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE665005C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2871552A (en) * | 1946-05-10 | 1959-02-03 | Elek Ska Svetsningsaktiebolage | Weld metal deposits and arc welding electrodes for producing the same |
| DE1085749B (en) * | 1956-10-06 | 1960-07-21 | Deutsche Edelstahlwerke Ag | Solder and method for soldering iron and steel parts |
| DE1293528B (en) * | 1957-07-04 | 1969-04-24 | Boehler & Co Ag Geb | Plumb stick for brazing metallic materials |
-
1937
- 1937-02-03 DE DEP74682D patent/DE665005C/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2871552A (en) * | 1946-05-10 | 1959-02-03 | Elek Ska Svetsningsaktiebolage | Weld metal deposits and arc welding electrodes for producing the same |
| DE1085749B (en) * | 1956-10-06 | 1960-07-21 | Deutsche Edelstahlwerke Ag | Solder and method for soldering iron and steel parts |
| DE1293528B (en) * | 1957-07-04 | 1969-04-24 | Boehler & Co Ag Geb | Plumb stick for brazing metallic materials |
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