AT151933B - Scale-resistant chromium-nickel alloys and process for making the same. - Google Patents
Scale-resistant chromium-nickel alloys and process for making the same.Info
- Publication number
- AT151933B AT151933B AT151933DA AT151933B AT 151933 B AT151933 B AT 151933B AT 151933D A AT151933D A AT 151933DA AT 151933 B AT151933 B AT 151933B
- Authority
- AT
- Austria
- Prior art keywords
- scale
- alloys
- making
- same
- nickel alloys
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 3
- 239000000788 chromium alloy Substances 0.000 title description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 11
- 239000000956 alloy Substances 0.000 claims description 11
- -1 B. in vacuum Chemical compound 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 7
- 229910052776 Thorium Inorganic materials 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000007792 addition Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910000990 Ni alloy Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 241000387312 Hemiberlesia lataniae Species 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
Landscapes
- Resistance Heating (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
<Desc/Clms Page number 1>
Zunderfeste Chrom-NicM-Legierungen und Verfahren zur Herstellung derselben.
Es ist bekannt, Legierungen aus Chrom und Nickel als Baustoff für elektrisch beheiztes Widerstandsmaterial wie für Heizdrähte od. dgl. zu verwenden, da sich derartige Legierungen durch eine verhältnismässig gute Zunderfestigkeit auszeichnen.
Es wurde nun gefunden, dass man die Zunderfestigkeit derartiger Legierungen noch um ein
Vielfaches verbessern und ihre Lebensdauer, z. B. auf das Dreifache beim Gebrauch als Heizdrähte erhöhen kann, wenn man solchen handelsüblichen Chrom-Nickel-Legierungen Zusätze von Thorium einverleibt. Die Grösse des Thoriumzusatzes kann dabei in verhältnismässig weiten Grenzen schwanken. Insbesondere hat sieh herausgestellt, dass überraschenderweise auch bereits geringfügige Thoriumzusätze, wie solehe von etwa 0'2-6 Prozent, ausgezeichnete Auswirkungen auf die Zunderfestigkeit bzw. Lebensdauer der üblichen Chrom-Nickel-Legierungen besitzen.
So hat sich beispielsweise eine Legierung von 19% Chrom, 77% Nickel und 4% Thorium für die Verwendung als Heizdrähte ausgezeichnet bewährt.
Die Herstellung von Legierungen vorliegender Art geschieht vorteilhafterweise derart, dass man sich beim Zusammenschmelzen der Legierungskomponenten unter Fernhalten von Sauerstoff, z. B. im Vakuum, eines erheblichen Überschusses von dem desoxydierend wirkenden Thorium, z. B. von 50% des in der Endlegierung gewiinschten Thoriumgehaltes, bedient.
Gegebenenfalls können den vorliegenden Legierungen auch noch geringe Mengen anderer Metalle, wie z. B. Eisen, zulegiert werden, welche ihre mechanischen Eigenschaften verbessern, z. B. die Bearbeitung erleichtern oder in sonstiger Weise hinsichtlich des Kerngefüges ihre Eigenschaften zu verbessern vermögen.
PATENT-ANSPRÜCHE : l. Zunderfeste Chrom-Nickel-Legierungen, die gegebenenfalls noch untergeordnete Mengen anderer Metalle, z. B. Eisen, enthalten, gekennzeichnet durch einen die Zunderfestigkeit und die Lebensdauer der Legierungen bei hohen Temperaturen (über 1100c C) verbessernden, 6% nicht übersteigenden Gehalt an Thorium, vorzugsweise einen solchen von 0'2-4%.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Scale-resistant chrome-NicM alloys and process for the production thereof.
It is known to use alloys of chromium and nickel as a building material for electrically heated resistance material such as heating wires or the like, since such alloys are characterized by a relatively good resistance to scale.
It has now been found that the scale resistance of such alloys is still reduced
Improve many times and their service life, e.g. B. can be increased threefold when used as heating wires if additions of thorium are incorporated into such commercial chromium-nickel alloys. The size of the thorium addition can fluctuate within relatively wide limits. In particular, it has been shown that, surprisingly, even slight thorium additions, such as those of about 0.2-6 percent, have excellent effects on the scale resistance or service life of the usual chromium-nickel alloys.
For example, an alloy of 19% chromium, 77% nickel and 4% thorium has proven to be excellent for use as heating wires.
The production of alloys of the present type is advantageously carried out in such a way that when melting the alloy components together, keeping away from oxygen, e.g. B. in a vacuum, a significant excess of the deoxidizing thorium, z. B. of 50% of the desired thorium content in the final alloy.
Optionally, the present alloys can also contain small amounts of other metals, such as. B. iron, are added, which improve their mechanical properties, z. B. facilitate the processing or are able to improve their properties in some other way with regard to the core structure.
PATENT CLAIMS: l. Scale-resistant chrome-nickel alloys, which may contain minor amounts of other metals, e.g. B. iron, contain, characterized by the scale resistance and the service life of the alloys at high temperatures (over 1100c C) improving, 6% not exceeding thorium content, preferably a content of 0'2-4%.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE151933X | 1935-03-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT151933B true AT151933B (en) | 1937-12-10 |
Family
ID=5674758
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT151933D AT151933B (en) | 1935-03-22 | 1936-03-14 | Scale-resistant chromium-nickel alloys and process for making the same. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT151933B (en) |
-
1936
- 1936-03-14 AT AT151933D patent/AT151933B/en active
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