DE740351C - Use of alloys of the iron group for objects that are used in reducing atmosphere - Google Patents
Use of alloys of the iron group for objects that are used in reducing atmosphereInfo
- Publication number
- DE740351C DE740351C DEA86606D DEA0086606D DE740351C DE 740351 C DE740351 C DE 740351C DE A86606 D DEA86606 D DE A86606D DE A0086606 D DEA0086606 D DE A0086606D DE 740351 C DE740351 C DE 740351C
- Authority
- DE
- Germany
- Prior art keywords
- alloys
- molybdenum
- objects
- nickel
- iron group
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/057—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being less 10%
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Resistance Heating (AREA)
- Conductive Materials (AREA)
Description
Verwendung von Legierungen der Eisengruppe für Gegenstände, die in reduzierender Atmosphäre benutzt werden Bisher wird mit gutem Erfolg eine 208o Chrom-Nickel-Legierung für Heizdrähte oder -bänder verwendet. Diese Legierung hat bei Raumtemperatur einen Widerstand von 105 Mikrohm/cms, der sich bis zur Verwendungstemperatur um nur etwa 5 °/o ändert. Die daraus hergestellten Widerstände sind jedoch in kohlenoxydhaltigen Atmosphären bei zooo° nicht mehr brauchbar, ebensowenig wie solche aus Legierungen, deren Gehalt an Chrom ganz oder teilweise durch Aluminium ersetzt ist, da Chrom und Aluminium bei diesen Temperaturen von Kohlenoxyd stark angegriffen werden.Use of iron group alloys for items made in reducing atmosphere. So far, a 2080 chromium-nickel alloy has been used with good success used for heating wires or tapes. This alloy has a at room temperature Resistance of 105 microhm / cms, which increases up to the usage temperature by only about 5 ° / o changes. The resistors made from it, however, are in carbon monoxide-containing Atmospheres at zooo ° no longer usable, just as little as those made from alloys, the chromium content of which has been completely or partially replaced by aluminum, since chromium and aluminum are strongly attacked by carbon oxide at these temperatures.
Gegenstand der Erfindung ist eine an sich für die Verwendung bei hohen Temperaturen in oxydierenden Atmosphären bekannte hochhitzebeständige Legierung, die in kohlenoxydhaltigen Ofenatmosphären bei hohen Temperaturen verwendet wird. Sie besteht aus einem oder mehreren Metallen der Eisengruppe und Molybdän und/oder Wolfram. Vorzugsweise wird als Metall der Eisengruppe Nickel verwendet, .das für sich zwar der Einwirkung kohlenoxydhaltiger Atmosphären bei hohen Temperaturen widersteht, aber nicht die notwendige Festigkeit und die gewünschten elektrischen Eigenschaften hat. Die vorzugsweise zu verwendende Legierung besteht aus 2o'/, Molybdän und 8o0/, Nickel und hat etwa dieselben Festigkeitseigenschaften wie eine 2o/8o Chrom-Nickel-Legierung. Sie hat bei Zimmertemperatur einen Widerstand von- 1o5 Mikrohm/cm3, der sich bei der Erhitzung auf i i 5o0 um etwa io °/° ändert. Sie läßt sich leicht bearbeiten und hat, verglichen mit den Chrom enthaltenden Legierungen, eine erhöhte Lebensdauer.The subject of the invention is one per se for use at high Temperatures in oxidizing atmospheres known high temperature resistant alloy, which is used in furnace atmospheres containing carbon dioxide at high temperatures. It consists of one or more metals of the iron group and molybdenum and / or Tungsten. Nickel is preferably used as the metal of the iron group resists the effects of carbon dioxide-containing atmospheres at high temperatures, but not the necessary strength and the desired electrical properties Has. The preferred alloy to be used consists of 2o '/, molybdenum and 8o0 /, Nickel and has roughly the same strength properties as a 2o / 8o chromium-nickel alloy. she has a resistance of -1o5 microhm / cm3 at room temperature, which is at the Heating to i i 5o0 changes by about io ° / °. It is easy to edit and has an increased service life compared to the chromium-containing alloys.
Dia Legierungen mit niedrigem Molybdängehalt ändern ihren Widerstand mit der Temperatur mehr als die hochmolybdänhaltigen. Bei sehr hohen Molybdängehalten werden die Legierungen leicht brüchig, und es werden daher Legierungen mit mehr als 12%, aber weniger als 4o0/° 11lalybdän verwendet.Dia alloys with a low molybdenum content change their resistance with temperature more than the high molybdenum. With very high molybdenum contents the alloys become easily brittle, and therefore alloys with more than 12%, but less than 4o0 / ° 11lalybdenum used.
Das Molybdän kann ganz oder teilweise durch Wolfram ersetzt sein, wobei der Wolframgehalt zweckmäßig etwas größer als der ersetzte Molybdängehalt ist.The molybdenum can be completely or partially replaced by tungsten, the tungsten content suitably somewhat greater than the replaced molybdenum content is.
Neben Niclcel können noch Eisen und/oder Kobalt enthalten sein. Legierungen aus 650/0 Nickel, 2o0/0 Molybdän und 15'/, Eisen oder aus 650/0 Nickel, 12')/, Molybdän und 23/, Eisen oder entsprechende Nickel-Wolfram-Eisen-Legierungen haben befriedigende Festigkeitseigenschaften und Widerstandswerte und sind gegen reduzierende Gase, insbesondere Kohlenoxyd, beständig. Die Schmiedbarkeit der Legierungen bei 1250° wird durch einen Zusatz von etwa o,5% Mangan erhöht. Die Legierungen können nicht nur zur Herstellung von Heizdrähten, sondern auch zu Rollen, Tragarmen, Schienen oder Kettengliedern verarbeitet werden, die in elektrischen Ofen Verwendung finden.In addition to Niclcel, iron and / or cobalt can also be included. Alloys from 650/0 nickel, 2o0 / 0 molybdenum and 15 '/, iron or from 650/0 nickel, 12') /, molybdenum and 23 /, iron or corresponding nickel-tungsten-iron alloys have satisfactory Strength properties and resistance values and are against reducing gases, especially carbon monoxide, resistant. The forgeability of the alloys at 1250 ° is increased by adding about 0.5% manganese. The alloys cannot only for the production of heating wires, but also for rollers, support arms, rails or chain links used in electric ovens.
Claims (3)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US740351XA | 1937-04-30 | 1937-04-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE740351C true DE740351C (en) | 1943-10-19 |
Family
ID=22117304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEA86606D Expired DE740351C (en) | 1937-04-30 | 1938-04-27 | Use of alloys of the iron group for objects that are used in reducing atmosphere |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE740351C (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1375083A (en) * | 1918-08-15 | 1921-04-19 | Cleveland Brass Mfg Company | Alloy |
| US1375082A (en) * | 1918-08-15 | 1921-04-19 | Cleveland Brass Mfg Company | Alloy |
| DE518666C (en) * | 1926-06-17 | 1931-02-18 | Metallwerk Plansee G M B H | Electric resistance furnace whose heating element is made of tungsten or tungsten alloys or molybdenum or molybdenum alloys |
| DE544914C (en) * | 1927-03-12 | 1932-02-23 | Metallwerk Plansee G M B H | Electric resistance furnace with heating elements made of tungsten or a tungsten alloy or of molybdenum or a molybdenum alloy |
-
1938
- 1938-04-27 DE DEA86606D patent/DE740351C/en not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1375083A (en) * | 1918-08-15 | 1921-04-19 | Cleveland Brass Mfg Company | Alloy |
| US1375082A (en) * | 1918-08-15 | 1921-04-19 | Cleveland Brass Mfg Company | Alloy |
| DE518666C (en) * | 1926-06-17 | 1931-02-18 | Metallwerk Plansee G M B H | Electric resistance furnace whose heating element is made of tungsten or tungsten alloys or molybdenum or molybdenum alloys |
| DE544914C (en) * | 1927-03-12 | 1932-02-23 | Metallwerk Plansee G M B H | Electric resistance furnace with heating elements made of tungsten or a tungsten alloy or of molybdenum or a molybdenum alloy |
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