DE674593C - Nitriding steel - Google Patents
Nitriding steelInfo
- Publication number
- DE674593C DE674593C DES122319D DES0122319D DE674593C DE 674593 C DE674593 C DE 674593C DE S122319 D DES122319 D DE S122319D DE S0122319 D DES0122319 D DE S0122319D DE 674593 C DE674593 C DE 674593C
- Authority
- DE
- Germany
- Prior art keywords
- steel
- tantalum
- niobium
- carbon
- nitriding
- 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
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
Description
Nitrierstahl Die Erfindung betrifft die Verwendung eines Stahles für Gegenstände, die an ihrer Oberfläche durch Nitrieren gehärtet werden sollen.Nitriding steel The invention relates to the use of a steel for Objects that are to be hardened on their surface by nitriding.
Die Verwendung von Tantal oder Niob in Stählen von niedrigem Kohlenstoffgehalt ist an sich bekannt. Es war aber bisher nicht bekannt, daß Stähle mit weniger als o,2% Kohlenstoff und bis zu i o % Tantal oder Niob, Rest Eisen, für das Nitrieren besonders geeignet sind.The use of tantalum or niobium in low carbon steels is known per se. However, it was not previously known that steels with less than 0.2% carbon and up to 10% tantalum or niobium, the remainder iron, for nitriding are particularly suitable.
Die Erfindung besteht in der Verwendung der vorgenannten Stähle mit unter o,2% Kohlenstoff und bis zu ioo'o Tantal oder Niob, Rest Eisen, mit der Maßgabe, daß der Tantal- oder Niobgehalt in einem größeren Betrage vorhanden ist, als zur Bindung des Kohlenstoffs erforderlich ist, als Werkstoff für Gegenstände, die eine Oberflächenhärtung durch Nitrieren erfahren sollen. " Diese Stähle erhalten durch das Nitrieren eine harte Oberflächenschicht von gegebener Tiefe sehr viel schneller als irgendein anderer bekannter Nitrierstahl.The invention consists in the use of the aforementioned steels less than 0.2% carbon and up to 100,000 tantalum or niobium, the remainder being iron, with the proviso, that the tantalum or niobium content is present in a larger amount than for Bonding of carbon is required as a material for objects that have a Surface hardening by nitriding. "These steels get through nitriding a hard surface layer of a given depth much faster than any other known nitriding steel.
Der verwendete Stahl kann bis zu i o/o Aluminium außer den erwähnten Zusätzen enthalten; er enthält vorzugsweise z bis 6% Tantal oder Niob mit i % Aluminium. Es ist zwar bekannt, Aluminium Stählen zuzusetzen, die eine Oberflächenhärtung durch Nitrieren erfahren sollen; es hat sich aber ergeben, daß ein besonderer Fortschritt erreicht wird, wenn die oben angegebene Menge von Aluminium in einem Stahl vorhanden ist, der auch Tantal oder Niob in der angegebenen Menge erhält.The steel used can be up to 100% aluminum in addition to those mentioned Contain additives; it preferably contains from z to 6% tantalum or niobium with 1% aluminum. It is known to add aluminum to steels that cause surface hardening Should experience nitriding; But it has turned out that a particular advance is achieved when the above specified amount of aluminum is present in a steel which also contains tantalum or niobium in the specified amount.
Ein Ausführungsbeispiel der Erfindung ist das folgende: Der verwendete Stahl enthält weniger als o,zoio. Kohlenstoff, z bis 6% Tantal oder Niob und i % Aluminium. Dieser Stahl wird einer Stickstoffbehandlung in dissoziertem Ammoniakgas bei einer Temperatur von 50o bis 700° C unterworfen. Der so an der Oberfläche gehärtete Stahl weist, wie Versuche ergeben haben, einen Härtewert von annähernd iooo V. D. H. (Vickers Diamant-Härte) bis auf eine Tiefe von o,35 mm auf, wenn er 24 Stunden lang bei 55o° C Stickstoff behandelt ist. Diese Eigenschaften sind wesentlich besser als die irgendeines der bis jetzt bekannten nitrierten Stähle, bei denen eine Stickstoffbehandlung von mindestens 5o Stunden Dauer erforderlich war, um eine einigermaßen gleich dicke und harte Oberflächenschicht zu erzielen.An embodiment of the invention is as follows: The one used Steel contains less than o, zoio. Carbon, z up to 6% tantalum or niobium and i% Aluminum. This steel undergoes a nitrogen treatment in dissociated ammonia gas subjected at a temperature of 50o to 700 ° C. The one hardened on the surface As tests have shown, steel has a hardness value of approximately 1,000 V.D. H. (Vickers diamond hardness) to a depth of o.35 mm if it is 24 hours treated with nitrogen for a long time at 55o ° C. These properties are much better than any of the heretofore known nitrided steels which have been treated with nitrogen of at least 50 hours in duration was required to produce a reasonably equal thickness and to achieve hard surface layer.
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB674593X | 1935-04-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE674593C true DE674593C (en) | 1939-04-17 |
Family
ID=10491968
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES122319D Expired DE674593C (en) | 1935-04-30 | 1936-04-10 | Nitriding steel |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE674593C (en) |
-
1936
- 1936-04-10 DE DES122319D patent/DE674593C/en not_active Expired
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