DE541039C - Steel alloys with high resistance to attack by acids, to rusting and especially to scaling - Google Patents
Steel alloys with high resistance to attack by acids, to rusting and especially to scalingInfo
- Publication number
- DE541039C DE541039C DEST41951D DEST041951D DE541039C DE 541039 C DE541039 C DE 541039C DE ST41951 D DEST41951 D DE ST41951D DE ST041951 D DEST041951 D DE ST041951D DE 541039 C DE541039 C DE 541039C
- Authority
- DE
- Germany
- Prior art keywords
- scaling
- rusting
- acids
- steel alloys
- attack
- 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
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/06—Alloys based on chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cookers (AREA)
- Laminated Bodies (AREA)
Description
Stahllegierungen mit hoher Widerstandsfähigkeit gegen den Angriff von Säuren, gegen Rosten und insbesondere gegen Verzundern Die bisher bekannten Stähle, die gegen Korrosion und besonders gegen Oxydation `bei hohen Temperaturen widerstandsfähig sein sollten, haben diese Eigenschaften nur bis zu einem gewissen Grade. So wird z. B. der im Handel seit langem erhältliche sogenannte rostfreie Chromstahl mit etwa 1,1 0o Chrom von Salz- und Schwefelsäure angegriffen. Ebenso rostet dieser Stahl nach verhältnismäßig kurzer Zeit und zundert bei höheren Temperaturen zwischen 700 und 1 Zoo' C.Steel alloys with high resistance to the attack of acids, to rusting and especially to scaling. The steels known up to now, which should be resistant to corrosion and especially to oxidation at high temperatures, only have these properties to a certain extent. So z. B. the so-called stainless chromium steel with about 1.1 0o chromium, which has long been available in the trade, is attacked by hydrochloric and sulfuric acid. This steel also rusts after a relatively short time and scales at higher temperatures between 700 and 1 zoo 'C.
Höher legierte reine Chrömstälrle bekannter Zusammensetzung, wie z. B. mit 20 Q'o und mehr Chrom, neigen schon weniger leicht zur Rostbildung und zundern bei so hohen Temperaturen etwas weniger, haben aber den Nachteil größerer Sprödigkeit, so daß sie daher für viele Zwecke nicht verwendet werden können.Higher alloyed pure chrome steel beads of known composition, such as B. with 20 Q'o and more chrome, tend to rust and scale less easily a little less at such high temperatures, but have the disadvantage of greater brittleness, so that they therefore cannot be used for many purposes.
Die bekannten rostsicheren Chromnickelstähle haben wohl 'gegenüber den reinen Chromstählen gesteigerte Widerstandsfähigkeit gegen Schwefelsäure und Salzsäure. eine höhere Wärmefestigkeit und Rostsicherheit, zundern aber bei hohen Temperaturen von 7oo bis t 2oo° C auch noch in einem Nfaße, das ihre Verwendung für bestimmte Zwecke nicht mehr gestattet.The well-known rust-proof chromium-nickel steels probably have 'opposite the pure chrome steels increased resistance to sulfuric acid and Hydrochloric acid. a higher heat resistance and rust resistance, but scale at high Temperatures from 7oo to 2oo ° C also still in a barrel that allows them to be used no longer permitted for certain purposes.
Reine Nickelstähle dagegen besitzen bei Gehalten an Nickel von 1 o bis 15 o/o wohl einen größeren Widerstand gegen bestimmte Säuren, rosten aber ebenfalls und zundern bei genannten Temperaturen stark. Die neue komplexe Stahllegierung ist weich, läßt sich gut schmieden, walzen und bearbeiten, wodurch ihrer Verwendung keinerlei Grenzen gesetzt sind. Ihre Härte beträgt unter 35o (nach B r i n e 11). Sie ist bei hohen Temperaturen von 700 bis 1200'C praktisch zunderbeständig.Pure nickel steels, on the other hand, have a higher resistance to certain acids with nickel contents of 1 o to 15 o / o, but they also rust and scale strongly at the temperatures mentioned. The new complex steel alloy is soft, can be forged, rolled and machined well, so there are no limits to its use. Their hardness is less than 35o (according to B rine 11). It is practically non-scaling at high temperatures of 700 to 1200 ° C.
Die Zusammensetzung der Legierung ist folgende: Chrom 2o bis 6o o;ü, Kobalt i bis 12 %, Tantal o,5 bis 18 oo, Kohlenstoff unter 1,o o`o, Eisen: Rest.The composition of the alloy is as follows: Chromium 2o to 6o o; ü, Cobalt i to 12%, tantalum 0.5 to 18 oo, carbon less than 1, o o`o, iron: remainder.
Tantal oder Kobalt kann zum Teil durch Kupfer oder Aluminium oder Kupfer und Aluminium ersetzt werden.Tantalum or cobalt can be replaced in part by copper or aluminum or Copper and aluminum are replaced.
Als Mindestgehalte für Tantal bzw. Kobalt kommen auch hierbei o,5 bzw. 1,o ol'o in Frage.The minimum contents for tantalum or cobalt are also 0.5 or 1, o ol'o in question.
Die neue komplexe Stahllegierung vereint nicht nur höchste, fast absolute Zunderfreiheit zwischen 700 und 12oo° C mit völliger Rostsicherheit, sondern ist auch gegen Schwefel- und Salzsäure wesentlich beständiger als reine Chromstähle mit gleichem Chromgehalt wie die neue Legierung. Ebenso wichtig ist die Eigenschaft der, leichten Bearbeitbarkeit dieser neuen Stahllegierung gegenüber den bisherigen diesbezüglichen Schwierigkeiten bei Verwendung bekannter rostbeständiger Chromnickelstähle.The new complex steel alloy not only combines the highest, almost absolute freedom from scale between 700 and 1200 ° C with complete rust resistance, but is also significantly more resistant to sulfuric and hydrochloric acid than pure chrome steels with the same chrome content as the new alloy. Equally important is the fact that this new steel alloy can be easily machined compared to the previous difficulties in this regard when using known rust-resistant chromium-nickel steels.
Die Legierung hat dank ihrer neuen Eigenschaften und leichten Bearbeitbarkeit ein fast unbegrenztes Anwendungsgebiet z. B. für rostfreie Geräte, Gefäße, Maschinenteile, Werkzeuge, für Gegenstände oder Teile, die dem Angriff von Säuren widerstehen sollen, insbesondere aber für solche Gegenstände und Geräte, die hohen Temperaturen von yoo bis i 2oo° C ausgesetzt sind und dabei praktisch nicht verzundern dürfen, wie z. B. Brennroste.The alloy has thanks to its new properties and easy machinability an almost unlimited field of application z. B. for stainless devices, vessels, machine parts, Tools, for objects or parts that the attack of acids should withstand, but especially for objects and devices that are high Temperatures of yoo to i 2oo ° C are exposed and practically do not scale may, such as B. Burning grates.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST41951D DE541039C (en) | 1926-12-19 | 1926-12-19 | Steel alloys with high resistance to attack by acids, to rusting and especially to scaling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST41951D DE541039C (en) | 1926-12-19 | 1926-12-19 | Steel alloys with high resistance to attack by acids, to rusting and especially to scaling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE541039C true DE541039C (en) | 1932-01-04 |
Family
ID=7464090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEST41951D Expired DE541039C (en) | 1926-12-19 | 1926-12-19 | Steel alloys with high resistance to attack by acids, to rusting and especially to scaling |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE541039C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1121099B (en) * | 1956-04-23 | 1962-01-04 | Kanthal Ab | The use of an iron alloy as a material for highly heat-resistant objects that must be resistant to reducing nitrogenous gases |
-
1926
- 1926-12-19 DE DEST41951D patent/DE541039C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1121099B (en) * | 1956-04-23 | 1962-01-04 | Kanthal Ab | The use of an iron alloy as a material for highly heat-resistant objects that must be resistant to reducing nitrogenous gases |
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