DE1037152B - Process for generating protective gas for metallurgical purposes - Google Patents

Process for generating protective gas for metallurgical purposes

Info

Publication number
DE1037152B
DE1037152B DER9299A DER0009299A DE1037152B DE 1037152 B DE1037152 B DE 1037152B DE R9299 A DER9299 A DE R9299A DE R0009299 A DER0009299 A DE R0009299A DE 1037152 B DE1037152 B DE 1037152B
Authority
DE
Germany
Prior art keywords
protective gas
furnace
metallurgical purposes
paraformaldehyde
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
DER9299A
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 DER9299A priority Critical patent/DE1037152B/en
Publication of DE1037152B publication Critical patent/DE1037152B/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/008—Using a protective surface layer
    • 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

Description

Verfahren zur Schutzgaserzeugung für metallurgische Zwecke In dem Hauptpatent 1022 216 ist ein Verfahren zur Schutzgaserzeugung für Lötöfen, insbesondere für Nichteisenmetalle, beschrieben, wobei in den Ofen feste Stoffe in Tablettenform eingebracht werden und wobei aus diesen Stoffen unter Einwirkung der Ofenw iirme das Schutzgas entwickelt wird durch die Verwendung von Paraformaldehyd als Schutzgaserzeuger.Process for generating protective gas for metallurgical purposes The main patent 1 022 216 describes a process for generating protective gas for soldering furnaces, 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 action of the furnace heaters through the use of paraformaldehyde as a protective gas generator.

Für metallurgische Zwecke, insbesondere Glühungen, ist die Verwendung von Wasserdampf oder wasserdampfhaltigem Schutzgas bisweilen von Vorteil. Die Erfindung ermöglicht nun auch die Erzeugung des Wasserdampfes innerhalb des benötigten Ofens.For metallurgical purposes, in particular annealing, is the use of steam or protective gas containing steam is sometimes an advantage. The invention now also enables the generation of water vapor within the required furnace.

Wasserdampf allein bildet eine oxydierende Atmosphäre, die nicht immer befriedigt. Die Erfindung sieht daher vor, dem Wasserdampf sauerstoffbindende :Mittel beizufügen. Zur Erzeugung einer solchen wasserdampfhaltigen Atmosphäre werden dem Paraformaldehyd als Schutzgas erzeugende Substanzen erfindungsgemäß Kohlehydrate, beispielsweise Zucker, beigemengt. Die Substanzen erzeugen dann Wasserdampf. Gleichzeitig binden die Kohlerückstände bei höherer Temperatur Sauerstoff.Water vapor alone creates an oxidizing atmosphere, which not always satisfied. The invention therefore provides, the water vapor oxygen-binding: agents to add. To generate such an atmosphere containing water vapor, the Paraformaldehyde as a protective gas producing substances according to the invention carbohydrates, for example sugar, added. The substances then generate water vapor. Simultaneously the coal residues bind oxygen at higher temperatures.

Man kann aber den Wasserdampf auch besonders erzeugen, beispielsweise indem in den oder an den Ofen ein Wasserdampfgenerator eingebaut oder eingesetzt wird oder indem Wasser in flüssiger Form eingespritzt wird. Hierbei müssen dann die sauerstoffbindenden Mittel besonders in den Ofen eingebracht werden.But you can also generate the water vapor in a special way, for example by installing or using a steam generator in or on the furnace or by injecting water in liquid form. Here must then the oxygen-binding agents are especially introduced into the furnace.

Dem Schutzgas kann man übrigens mit Vorteil auch noch löterleichternde Mittel, z. B. Borax, zufügen. -,Man kann also z. B. Ammonium Pentaborat verwenden, das gleichzeitig Schutzgas erzeugt und die Lötung durch Bildung von Boraten erleichtert.Incidentally, the shielding gas can also be used to make soldering easier Means, e.g. B. Borax, add. -, So you can z. B. use ammonium pentaborate, which at the same time generates protective gas and facilitates soldering through the formation of borates.

Zweckmäßig ist es auch, wenn der Schutzgas erzeugenden Substanz etwas Calciumcarbid beigemengt wird, das mit dem Wasserdampf Acetylen ergibt, welches bekanntlich stark reduzierend ist.It is also useful if the substance producing protective gas is something Calcium carbide is added, which results in acetylene with the water vapor, which is known to be strongly reducing.

Claims (4)

PATFNT.ANSPRt@CHE: 1. Verfahren zur Schutzgaserzeugung für Lötöfen, insbesondere für Nichteisenmetalle, wobei in den Ofen festes Paraformaldehyd in Tablettenform eingebracht wird und wobei aus diesem Stoff unter der Einwirkung der Ofenwärme das Schutzgas entwickelt wird, nach Patent 1022 016, dadurch gekennzeichnet, daß dem Paraformaldehyd Kohlenhydrate, insbesondere Zucker, beigemengt werden. PATFNT.ANSPRt@CHE: 1. A process for inert gas generation for brazing furnaces, in particular for non-ferrous metals, is introduced into the furnace solid paraformaldehyde in tablet form and which is developed from this material under the action of the furnace heat the protective gas according to Patent 1,022,016, characterized characterized in that carbohydrates, especially sugar, are added to the paraformaldehyde. 2. Verfahren nach Anspruch 1, gekennzeichnet durch die Verwendung von Alkohol und/oder Benzol in der Schutzgas erzeugenden Substanz. 2. Method according to claim 1, characterized by the use of alcohol and / or Benzene in the substance producing protective gas. 3. Verfahren nach Anspruch 1 und 2, gekennzeichnet durch die Beifügung eines die Lötung erleichternden Mittels zu der das Schutzgas erzeugenden Substanz. 3. The method according to claim 1 and 2, characterized by the addition of a soldering agent to the the substance producing the protective gas. 4. Verfahren nach Anspruch 1 bis 3, gekennzeichnet durch die Verwendung von Calciumcarbid als Beimengung zu der das Schutzgas erzeugenden Substanz. In Betracht gezogene Druckschriften: Britische Patentschrift Nr. 371054.4. The method according to claim 1 to 3, characterized by the use of calcium carbide as an admixture to the substance generating the protective gas. References considered: British Patent No. 371 054.
DER9299A 1952-06-19 1952-06-19 Process for generating protective gas for metallurgical purposes Pending DE1037152B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER9299A DE1037152B (en) 1952-06-19 1952-06-19 Process for generating protective gas for metallurgical purposes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER9299A DE1037152B (en) 1952-06-19 1952-06-19 Process for generating protective gas for metallurgical purposes

Publications (1)

Publication Number Publication Date
DE1037152B true DE1037152B (en) 1958-08-21

Family

ID=7398079

Family Applications (1)

Application Number Title Priority Date Filing Date
DER9299A Pending DE1037152B (en) 1952-06-19 1952-06-19 Process for generating protective gas for metallurgical purposes

Country Status (1)

Country Link
DE (1) DE1037152B (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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