DE1022016B - Process for generating protective gas for soldering stoves - Google Patents

Process for generating protective gas for soldering stoves

Info

Publication number
DE1022016B
DE1022016B DER9170A DER0009170A DE1022016B DE 1022016 B DE1022016 B DE 1022016B DE R9170 A DER9170 A DE R9170A DE R0009170 A DER0009170 A DE R0009170A DE 1022016 B DE1022016 B DE 1022016B
Authority
DE
Germany
Prior art keywords
protective gas
soldering
paraformaldehyde
stoves
generating protective
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.)
Pending
Application number
DER9170A
Other languages
German (de)
Inventor
Dr Phil Helmut Gagel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PHIL HELMUT GAGEL DR
Original Assignee
PHIL HELMUT GAGEL DR
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by PHIL HELMUT GAGEL DR filed Critical PHIL HELMUT GAGEL DR
Priority to DER9170A priority Critical patent/DE1022016B/en
Publication of DE1022016B publication Critical patent/DE1022016B/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/76—Adjusting the composition of the atmosphere
    • 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
    • B23K35/38—Selection of media, e.g. special atmospheres for surrounding the working area

Description

Verfahren zur Schutzgaserzeugung für Lötöfen Chemische Reaktionen und Lötvorgänge müssen häufig in einer Schutzgasatmosphäre durchgeführt werden.Process for generating protective gas for soldering ovens Chemical reactions and soldering processes often have to be carried out in a protective gas atmosphere.

Anlagen für die Erzeugung derartiger Schutzgase sind sperrig, teuer und schlecht transportierbar.Systems for the generation of such protective gases are bulky and expensive and difficult to transport.

Es sind bisher Verfahren zur Schutzgaserzeugung bekanntgeworden, welche die Nachteile solcher Anlagen in überraschend einfacher Weise beseitigen, und zwar durch die Verwendung fester oder pastöser organischer Substanzen, vorzugsweise in Tablettenform.There are previously known methods for generating protective gas, which eliminate the disadvantages of such systems in a surprisingly simple manner, namely through the use of solid or pasty organic substances, preferably in Tablet form.

Die für diese Zwecke verwendbaren Substanzen dürfen keine Rückstände bilden, sie dürfen die miteinander reagierenden oder zu verlötenden Substanzen nicht nennenswert angreifen, sie dürfen weder allein noch in Verbindung mit den durch Schutzgas umspülten Substanzen explosiv sein, und sie müssen leicht reduzierbar sein.The substances that can be used for these purposes must not leave any residues form, they must not react with each other or to be soldered substances attack significantly, they must not go through either alone or in conjunction with the Substances surrounded by inert gas must be explosive and they must be easily reducible be.

Erfindungsgemäß wird daher vorgeschlagen, Paraformaldehyd als Schutzgaserzeuger zu verwenden. Der technische Fortschritt in der Verwendung von Paraformaldehyd ist der, daß ein für Desinfektionszwecke hergestelltes Großprodukt sich schon bei Temperaturen von 100'' unzersetzt verdampft und eine Schutzgasatmosphäre abgibt, welche bei niedrigsten Temperaturen ein Anlaufen von Kupferlegierungen verhindert, ohne die Gefahr von Wasserstoffexplosionen herbeizuführen.According to the invention it is therefore proposed that paraformaldehyde be used as a protective gas generator to use. The technical advancement in the use of paraformaldehyde is that a large product manufactured for disinfection purposes is already at high temperatures of 100 '' evaporates undecomposed and emits a protective gas atmosphere, which at the lowest Temperatures prevent tarnishing of copper alloys without the risk of Cause hydrogen explosions.

Die Schutzgaswirkung erfordert, daß H20 -I- CO im Gleichgewicht steht zu H2 -I- CO,. Dies wird bei dem Verfahren der Erfindung durch Beimengung von einerseits Wasser bindenden Mitteln, z. B. Zink- oder Messingspänen oder metallischen Verbindungen, vorzugsweise Hydriden, z. B. von Calciumhydrid, oder Gußeisenspänen, erreicht und andererseits durch Beiinengungen, die das Kohlenstoff-Wasserstoff-Verhältnis den jeweiligen Forderungen anpassen, wie kohlenstoffreiche Verbindungen z. B. zyklische Kohlenwasserstoffe.The protective gas effect requires that H20 -I- CO is in equilibrium with H2 -I- C O ,. This is done in the method of the invention by adding, on the one hand, water-binding agents, e.g. B. zinc or brass chips or metallic compounds, preferably hydrides, z. B. of calcium hydride, or cast iron filings, and on the other hand by Beiinengungen that adjust the carbon-hydrogen ratio to the respective requirements, such as high-carbon compounds z. B. cyclic hydrocarbons.

Die erfindungsgemäß verwendete Substanz kann auch in eine Schutzhülle, z. B. Paraffin eingeschlossen werden, die vorteilhafterweise zugleich zur Schutzgaserzeugung beiträgt.The substance used according to the invention can also be placed in a protective cover, z. B. paraffin are included, which is advantageous at the same time to generate protective gas contributes.

Claims (3)

PATENTANSPRÜCHE: 1. Verfahren zur Schutzgaserzeugung für Lötöfen, insbesondere für Nichteisenmetalle, wobei in den Ofen feste Stoffe in Tablettenform eingebracht werden und wobei aus diesen Stoffen unter Einwirkung der Ofenwärme das Schutzgas entwickelt wird, gekennzeichnet durch die Verwendung von Paraformaldehyd als Schutzgaserzeuger. PATENT CLAIMS: 1. Process for generating protective gas for soldering ovens, in particular for non-ferrous metals, whereby solid substances are introduced into the furnace in tablet form and the protective gas is developed from these substances under the influence of the furnace heat, characterized by the use of paraformaldehyde as a protective gas generator. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß dem Paraformaldehyd Ammoniumcarbonat und wasserbindende Mittel, beispielsweise Calciumhydrid, beigemengt werden. 2. The method according to claim 1, characterized in that the paraformaldehyde ammonium carbonate and water-binding agents, for example calcium hydride, be added. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man das Paraformaldehyd mit einer Schutzhülle versieht, die ebenfalls unter Schutzgasentwickung zerfällt. In Betracht gezogene Druckschriften Britische Patentschrift Nr. 371054.3. The method according to claim 1, characterized in that the paraformaldehyde is provided with a protective cover which also disintegrates with the development of protective gas. References considered British Patent No. 371 054.
DER9170A 1952-05-30 1952-05-30 Process for generating protective gas for soldering stoves Pending DE1022016B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER9170A DE1022016B (en) 1952-05-30 1952-05-30 Process for generating protective gas for soldering stoves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER9170A DE1022016B (en) 1952-05-30 1952-05-30 Process for generating protective gas for soldering stoves

Publications (1)

Publication Number Publication Date
DE1022016B true DE1022016B (en) 1958-01-02

Family

ID=7398056

Family Applications (1)

Application Number Title Priority Date Filing Date
DER9170A Pending DE1022016B (en) 1952-05-30 1952-05-30 Process for generating protective gas for soldering stoves

Country Status (1)

Country Link
DE (1) DE1022016B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB371054A (en) * 1931-01-21 1932-04-21 Walter M Cross Improvements in or relating to the heat treatment of steel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB371054A (en) * 1931-01-21 1932-04-21 Walter M Cross Improvements in or relating to the heat treatment of steel

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