AT107312B - Chromium-manganese steels for the manufacture of objects that require great toughness and resistance to acids, water, air and alkalis. - Google Patents
Chromium-manganese steels for the manufacture of objects that require great toughness and resistance to acids, water, air and alkalis.Info
- Publication number
- AT107312B AT107312B AT107312DA AT107312B AT 107312 B AT107312 B AT 107312B AT 107312D A AT107312D A AT 107312DA AT 107312 B AT107312 B AT 107312B
- Authority
- AT
- Austria
- Prior art keywords
- chromium
- alkalis
- acids
- objects
- air
- Prior art date
Links
Description
<Desc/Clms Page number 1>
Chrom-Maganstähle zur Herstellung von Gegenständen, die grosse Zähigkeit und
Widerstandsfähigkeit gegen Säuren, Wasser, Luft und Alkalien erfordern.
Für die Herstellung von korrosionswiderstandsfä. higen Gegenständen wird hochprozentiger Chromstahl häufig verwendet.
Die vorliegende Erfindung betrifft Chrom-Manganstähle, die sehr widerstandsfähig gegen die Einwirkungen von Säuren, Wasser, Luft und Alkalien sind und ausserdem hohe Zähigkeit besitzen.
Es war nicht anzunehmen, dass durch Zusatz von höheren Mangangehalten zu Chromstählen korrosionssichere Stähle von besonderen Eigenschaften erzielt werden. Untersuchungen haben nun ergeben,
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dass es Austenitbildung hervorruft. Die Fähigkeit des Mangans, Austenitbildung hervorzurufen, ist dem Metallurgen zwar bekannt, nicht aber, dass dadurch die Widerstandsfähigkeit der Chromstähle gegen chemische Einwirkungen von Säuren, Wasser, Luft und Alkalien begünstigt wird und ausserdem
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stähle nicht zu erzielen sind. Letztere sind nur im abgeschreckten Zustande, in dem sie martensitisch und spröde sind, vollkommen widerstandsfähig gegen Rost, aber in diesem Zustande für viele Zwecke nicht zu verwenden.
Durch den erhöhten Manganzusatz erreicht man, dass die Stähle im abgeschreckten Zustande zähe werden und trotzdem widerstandsfähig sind. Desgleichen eignen sich solche Stähle auch fiir Gegenstände, die nicht magnetisierbar sein dürfen.
Besonders gute Erfolge erzielt man z. B. mit einem Stahl folgender Zusammensetzung:
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Ein Vorteil des erhöhten Manganzusatzes liegt auch darin, dass ein solcher Stahl besser sehmiedbar ist, als reiner Chromstahl. Es ist z. B. ein Stahl mit 0.8% Kohlenstoff, 24% Chrom und 8% Mangan besser schmiedbar, als ein Stahl mit 0. 6% Kohlenstoff und 120 Chrom.
Diesen Stählen verleiht man die erwähnten Eigenschaften und das austenitische Gefüge dadurch, dass man sie von einer Temperatur von 950-1200 C rasch abkühlt.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Chromium-maganese steels for the manufacture of objects that have great toughness and
Require resistance to acids, water, air and alkalis.
For the production of corrosion-resistant. High-percentage chrome steel is often used in some objects.
The present invention relates to chromium-manganese steels, which are very resistant to the effects of acids, water, air and alkalis and also have high toughness.
It was not to be assumed that the addition of higher manganese contents to chrome steels would result in corrosion-resistant steels with special properties. Investigations have now shown
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that it causes austenite formation. The ability of manganese to produce austenite is known to the metallurgist, but not that it improves the resistance of chromium steels to the chemical effects of acids, water, air and alkalis
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steels cannot be achieved. The latter are only completely resistant to rust in the quenched condition, in which they are martensitic and brittle, but cannot be used in this condition for many purposes.
The increased amount of manganese ensures that the steels become tough in the quenched state and are nonetheless resistant. Such steels are also suitable for objects that must not be magnetizable.
Particularly good results can be achieved e.g. B. with a steel of the following composition:
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An advantage of the increased amount of manganese is that such a steel is easier to simmer than pure chrome steel. It is Z. B. a steel with 0.8% carbon, 24% chromium and 8% manganese is easier to forgive than a steel with 0.6% carbon and 120 chromium.
These steels are given the properties and austenitic structure mentioned by rapidly cooling them from a temperature of 950-1200 C.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE107312X | 1922-11-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT107312B true AT107312B (en) | 1927-09-26 |
Family
ID=5650973
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT107312D AT107312B (en) | 1922-11-01 | 1923-10-17 | Chromium-manganese steels for the manufacture of objects that require great toughness and resistance to acids, water, air and alkalis. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT107312B (en) |
-
1923
- 1923-10-17 AT AT107312D patent/AT107312B/en active
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