DE1253992B - Process for nitriding steel and cast iron using ionized nitrogen - Google Patents
Process for nitriding steel and cast iron using ionized nitrogenInfo
- Publication number
- DE1253992B DE1253992B DE1965R0040335 DER0040335A DE1253992B DE 1253992 B DE1253992 B DE 1253992B DE 1965R0040335 DE1965R0040335 DE 1965R0040335 DE R0040335 A DER0040335 A DE R0040335A DE 1253992 B DE1253992 B DE 1253992B
- Authority
- DE
- Germany
- Prior art keywords
- cast iron
- ionized nitrogen
- nitriding
- nitriding steel
- nitrogen
- 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.)
- Pending
Links
Classifications
-
- 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
- C23C8/06—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 using gases
- C23C8/36—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 using gases using ionised gases, e.g. ionitriding
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Description
Verfahren zur Nitrierung von Stahl und Gußeisen mittels ionisiertem Stickstoff Die Erfindung bezieht sich auf Verfahren zur Härtung von Stahl- und Gußeisenlegierungen mit Stickstoff (Nitrierhärtung).Process for nitriding steel and cast iron by means of ionized Nitrogen The invention relates to methods of hardening steel and cast iron alloys with nitrogen (nitriding).
Die Erfindung bezweckt die Entwicklung eines Verfahrens, das die bisher notwendige Behandlung in Behältern, teilweise Unterdruckbehältern, erübrigt. Der Zweck der Erfindung wird dadurch erreicht, daß der für die Nitrierhärtung notwendige Stickstoff in dissoziierter bzw. ionisierter Form im Plamabrenner erzeugt wird.The invention aims to develop a method that hitherto Necessary treatment in containers, sometimes vacuum containers, is unnecessary. Of the The purpose of the invention is achieved in that the necessary for the nitriding Nitrogen is generated in dissociated or ionized form in the plasma burner.
Als bekannte Verfahren zur Nitrierhärtung gelten: Gasnitrierung, Badnitrierung, Nitrierung bei Glimmentladung.Known methods for nitriding are: gas nitriding, bath nitriding, Nitration with glow discharge.
Bei dem Verfahren der Gasnitrierung wird der notwendige Stickstoff dem Ammoniakgasstrom entnommen, der die Oberfläche des Werkstückes bestreicht. Bei der Badnitrierung wird der Stickstoff den chemischen Verbindungen des umgebenden Bades entnommen.In the process of gas nitration, the necessary nitrogen taken from the stream of ammonia gas that sweeps the surface of the workpiece. at The bath nitriding removes the chemical compounds of the surrounding nitrogen Taken from the bath.
Die Nitrierung bei Glimmentladung erfolgt mit in der Glimmentladung aus Ammoniak gebildetem Stickstoff. Auch bei der Glimmentladung bildet sich ein Plasma, jedoch findet die Behandlung bei Unterdruck statt.The nitration during the glow discharge takes place with the glow discharge nitrogen formed from ammonia. Imagination also occurs during the glow discharge Plasma, however, the treatment takes place under negative pressure.
Das den Gegenstand der Erfindung bildende Verfahren soll an einem Beispiel erläutert werden: Als Plasmabrenner findet ein Brenner induktiver Bauart Verwendung.The object of the invention forming method is based on a Example: The plasma torch is an inductive type of torch Use.
Die Erzeugung des Plasmas geht wie folgt vor sich: In die Induktionsspule des Brenners wird ein Metall- oder Graphitstab eingebracht. Das im Frequenzgenerator erzeugte Wechselfeld heizt über die Spule den Metall- bzw. Graphitstab auf. Gleichzeitig läßt man Argon in den Brenner strömen. Der eingeführte Stab erhitzt nun das ihn umströmende Gas bis zur »Zündung«.The plasma is generated as follows: Into the induction coil A metal or graphite rod is inserted into the burner. That in the frequency generator The alternating field generated heats the metal or graphite rod via the coil. Simultaneously argon is allowed to flow into the burner. The inserted rod now heats it up Gas flowing around until "ignition".
Damit ist der Plasmazustand des Gases erreicht. Nach Entfernung des Stabes ersetzt man das Argon durch das Arbeitsgas Stickstoff.The plasma state of the gas is thus achieved. After removing the Rod one replaces the argon by the working gas nitrogen.
Das Plasma enthält nun dissoziierte bzw. ionisierte Stickstoffmolekeln. Die Temperaturen sinken vom Kern der »Plasmaflamme« zu den Randzonen hin. Unter Berücksichtigung der Warmfestigkeit des zu nitrierhärtenden Stahles bestreicht man die Oberfläche des Werkstückes mit der Spitze der »Plasmaflamme«.The plasma now contains dissociated or ionized nitrogen molecules. The temperatures drop from the core of the "plasma flame" to the edge zones. Under Consideration of the high temperature strength of the steel to be nitrided is coated the surface of the workpiece with the tip of the "plasma flame".
Hat diese eine zu hohe Temperatur, so bestreicht man die Oberfläche im Abstand von einigen Millimetern zur Flammenspitze. Die Temperaturmessung erfolgt spektroskopisch. Bei umfangreicheren Werkstückoberflächen kann der Vorgang des Bestreichens durch eine einfache Vorrichtung mechanisiert werden.If the temperature is too high, the surface is painted at a distance of a few millimeters from the tip of the flame. The temperature measurement takes place spectroscopic. In the case of larger workpiece surfaces, the process of painting be mechanized by a simple device.
Die nun erfolgende Zunahme der Härte mißt man nach Vickers oder anderen bekannten Verfahren. Der wesentliche Fortschritt der Erfindung, gegenüber bekannten Verfahren zur Nitrierhärtung, besteht in folgenden Vorzügen: 1. Das zu nitrierhärtende Werkstück muß nicht in einem Behälter untergebracht werden.The increase in hardness that now takes place is measured according to Vickers or others known procedures. The main advance of the invention, over known Process for nitriding has the following advantages: 1. The one to be nitrided The workpiece does not have to be accommodated in a container.
2. Größere Werkstücke können wegen der Transportierbarkeit der Anlage am Ort nitriergehärtet werden.2. Larger workpieces can be transported because of the transportability of the system be nitrided in place.
3. Sind nur besonders beanspruchte Zonen des Werkstückes zu härten, so können diese bequem gezielt behandelt werden. Das gilt auch für konstruktivbedingt schwer zugängliche Bearbeitungsflächen (z. B. für Hohlkehlen).3. If only particularly stressed areas of the workpiece are to be hardened, in this way, these can be conveniently treated in a targeted manner. This also applies to design-related Hard-to-reach machining areas (e.g. for covings).
4. Leichte Regelbarkeit der Plasmatemperatur und damit des Dissoziations- bzw. Ionisationsgrades. 5. Der Generator kann an das üblich verlegte Kraftstromnetz angeschlossen werden. Es wird, im Gegensatz zum Verfahren der Glimmentladung, kein Gleichstrom benötigt.4. Easy controllability of the plasma temperature and thus the dissociation or degree of ionization. 5. The generator can be connected to the usual power grid be connected. In contrast to the process of glow discharge, it does not become a DC power required.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1965R0040335 DE1253992B (en) | 1965-04-06 | 1965-04-06 | Process for nitriding steel and cast iron using ionized nitrogen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1965R0040335 DE1253992B (en) | 1965-04-06 | 1965-04-06 | Process for nitriding steel and cast iron using ionized nitrogen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1253992B true DE1253992B (en) | 1967-11-09 |
Family
ID=7406027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1965R0040335 Pending DE1253992B (en) | 1965-04-06 | 1965-04-06 | Process for nitriding steel and cast iron using ionized nitrogen |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1253992B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2842407A1 (en) * | 1978-09-29 | 1980-04-03 | Norbert Stauder | Surface treatment of workpiece in sealed chamber by glow discharge - where ionisation plasma burner is used to reinforce ionised gas in chamber, e.g. for nitriding or carburising steel |
| DE3217856A1 (en) * | 1982-05-12 | 1983-11-17 | Dnepropetrovskij chimiko-technologičeskij institut imeni F.E. Dzeržinskogo, Dnepropetrovsk | Method for nitrating metallic workpieces |
| FR2528875A1 (en) * | 1982-06-22 | 1983-12-23 | Dn Khim T | Rapid ion nitriding process - by scanning workpiece surface with high temp., high pressure plasma jet |
-
1965
- 1965-04-06 DE DE1965R0040335 patent/DE1253992B/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| None * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2842407A1 (en) * | 1978-09-29 | 1980-04-03 | Norbert Stauder | Surface treatment of workpiece in sealed chamber by glow discharge - where ionisation plasma burner is used to reinforce ionised gas in chamber, e.g. for nitriding or carburising steel |
| DE3217856A1 (en) * | 1982-05-12 | 1983-11-17 | Dnepropetrovskij chimiko-technologičeskij institut imeni F.E. Dzeržinskogo, Dnepropetrovsk | Method for nitrating metallic workpieces |
| FR2528875A1 (en) * | 1982-06-22 | 1983-12-23 | Dn Khim T | Rapid ion nitriding process - by scanning workpiece surface with high temp., high pressure plasma jet |
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