DE866296C - Process for the treatment of metal surfaces - Google Patents
Process for the treatment of metal surfacesInfo
- Publication number
- DE866296C DE866296C DEN4000A DEN0004000A DE866296C DE 866296 C DE866296 C DE 866296C DE N4000 A DEN4000 A DE N4000A DE N0004000 A DEN0004000 A DE N0004000A DE 866296 C DE866296 C DE 866296C
- Authority
- DE
- Germany
- Prior art keywords
- treatment
- metal surfaces
- diffusion
- addition
- procedure
- 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
- 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
-
- 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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/02—Pretreatment of the material to be coated
-
- 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
- C23C8/02—Pretreatment of the material to be coated
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
Description
Verfahren zur Behandlung von Metalloberflächen Die Erfindung betrifft in Verfahren zur Oberflächenbehandlung von. Metallen einschließlich Eisen und Stahl, durch das Metalloide, wie Kohlenstoff, Bor, Stickstoff u. dgl., aus der Gasphase in die Oberfläche diffundiert werden.METHOD OF TREATMENT OF METAL SURFACES The invention relates to in processes for the surface treatment of. Metals including iron and steel, through the metalloid, such as carbon, boron, nitrogen and the like, from the gas phase diffused into the surface.
Es wurde festgestellt, d'aß diese Stoffe nicht nur schneller und gleichmäßiger in das Grundmetall diffundieren, sondern auch in innigerer Verbindung mit dem Kern .der Werkstücke stehen, wenn man den flüchtigen Verbindungen d!er Metaliloide Halogene zusetzt. Durch dliesen Halogenzusatz wird die Geschwindigkeit der chemischen Platzwechselreaktion gesteigert.It was found that these substances were not only faster and more even diffuse into the base metal, but also in more intimate connection with the core .of the workpieces stand when you consider the volatile compounds of the metaliloids halogens clogs. This addition of halogen increases the speed of the chemical relocation reaction increased.
Läßt man beispielsweise kohltenstoffhaltige Gase, wie Tetrachlorkohlenstoff, bei entsprechender Temperatur auf eine Eisienoberfläch!e einwirken, so erfolgteine Diffusion des Kohlenstoffes in das Eisen. Die dabei vor sich gehende Platzwechselreaktion verläuft langsam, und infolgedessen bleibt die Diffusionsgeschwindigkeit äußerst klein.For example, if gases containing carbon, such as carbon tetrachloride, act on an iron surface at the appropriate temperature, this takes place Diffusion of the carbon into the iron. The change of place reaction that takes place is slow and, as a result, the rate of diffusion remains extremely high small.
Setzt man jedoch erfindungsgemäß dem Tetrachlorkohlenatöff eine gewisse Menge Chlorgas zu, so wird eine weitgehende Geschwindigkeitssteigerung des Diffusionsvorganges erreicht. Entsprechend dem chemischen Massenwirkungsgesetz ist hierbei die Dosierung des Chlorzusatzes von ausschlaggebender Bedeutung.If, however, according to the invention, a certain amount of carbon tetrachloride is used If the amount of chlorine gas is added, the speed of the diffusion process will be increased to a large extent achieved. The dosage is in accordance with the chemical law of mass action the addition of chlorine is of decisive importance.
Der an Hand des Beispiels der Diffusion einer flüchtigen Kohlen:stoffverbindung in Eisen a15 Grundmetall beschriebene Vorgang ist allgemeiner Anwendung fähig. Es können. in der beschriebenen Weise außer Kohlenstoff auch andere Metal'loide, wie Stickstoff, Phosphor, Schwefel, Bor, Arsen, Antimon u. dgl., außer in Eisen auch in andere Metalle, wie z. B. Kupfer, Zinn usw., eindiffundiert werden, wenn"dabei von Verbindungen ausgegangen wird, die bei Diffusionstemperatur eine Gasphase bilden, und durch entsprechenden Zusatz von Halogenen dafür Sorge getragen wird, daß die mit dem Grund metall sich bildende- Halogenverbindung durch dauernde Beeinflussung ödes chemischen Gleichgewichts die Reaktion immer im für die Diffusion dies Metalleids in: :das Grundrnetäll günstigen Sinne verlaufen läßt.Using the example of the diffusion of a volatile carbon compound The process described in iron a15 base metal is capable of general application. It can. in the manner described, in addition to carbon, other metalloids, how Nitrogen, phosphorus, sulfur, boron, arsenic, antimony and the like, except in iron too into other metals, such as B. copper, tin, etc., are diffused when "doing compounds are assumed which form a gas phase at diffusion temperature, and through the appropriate addition of halogens, care is taken that the with the base metal forming halogen compound through permanent influence chemical equilibrium, the reaction always takes place for the diffusion of this metal oxide in:: allows the basic principle to run in a favorable sense.
Eine durch Oxydation: undansch°ließende Reduktion oder eine auf andere Weise aktivierte Oberfläche isst dabei von wesentlicher Bedeutung. Insbesondere wird bei Anwendung einer aktivierten Oberfläche die Geschwindigkeit der Diffusion erhöht und idie Gleichmäßigkeit der Diffusionsschicht verbessert.A reduction resulting from oxidation, or one to others Wise activated surface eats thereby essential. In particular If an activated surface is applied, the rate of diffusion is determined increases and i improves the uniformity of the diffusion layer.
In technischer IHrinsicht bietet das Verfahren den Vortel"daß die Behandlung der Werkstücke infolge Erhöhung der Diffusionsgeschwindigkeit im Durchlaufverfahren erfolgen kann. Dabei können die Gase im Kreislauf und auch unter ständiger Regenerierung bei Abscheidung der Reaktionsproidukte geführt werden. Hierbei können die Gase je nach Zweckmäßigkeit im Gleich- oder Gegenstrom oder teils im Gleich-und teils im Gegenstrom zu idem zu behandelnden Gut durch dien Behandlungsraum strömen.From a technical point of view, the method offers the advantage "that the Treatment of the workpieces as a result of increasing the diffusion speed in a continuous process can be done. The gases can circulate and also with constant regeneration be performed when the reaction products are deposited. Here the gases can depending according to expediency in cocurrent or countercurrent or partly in parallel and partly in Flow countercurrent to the item to be treated through the treatment room.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEN4000A DE866296C (en) | 1951-06-08 | 1951-06-08 | Process for the treatment of metal surfaces |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEN4000A DE866296C (en) | 1951-06-08 | 1951-06-08 | Process for the treatment of metal surfaces |
Publications (1)
Publication Number | Publication Date |
---|---|
DE866296C true DE866296C (en) | 1953-02-09 |
Family
ID=7338196
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEN4000A Expired DE866296C (en) | 1951-06-08 | 1951-06-08 | Process for the treatment of metal surfaces |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE866296C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19539305A1 (en) * | 1995-10-23 | 1997-04-24 | Dechema | Titanium@-aluminium@ alloy parts with improved high temperature corrosion resistance |
-
1951
- 1951-06-08 DE DEN4000A patent/DE866296C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19539305A1 (en) * | 1995-10-23 | 1997-04-24 | Dechema | Titanium@-aluminium@ alloy parts with improved high temperature corrosion resistance |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2739907A (en) | Process for imparting an improved finish to the surface of metals by means of diffusion treatment | |
DE866296C (en) | Process for the treatment of metal surfaces | |
US2856312A (en) | Treating metal surfaces | |
DE1276607B (en) | Process for the diffusion of zinc and cadmium in places in a semiconductor body | |
JPS54152281A (en) | Surface-coated tool component and manufacturing method | |
US2157902A (en) | Impregnation of metals with silicon | |
US2071533A (en) | Process of cementation | |
US2801898A (en) | Treatment of ammonia-contaminated air | |
DE880086C (en) | Process for the production of diffusion coatings on metal objects, in particular objects made of iron or steel and device for carrying out the process | |
GB496866A (en) | Process for improving the working of metals by processes such as drawing, not involving the use of cutting tools | |
DE3011694C2 (en) | Process for coating wear surfaces, e.g. contact surfaces for low-voltage technology | |
DE1271084B (en) | Process for the production of chlorine | |
DE566780C (en) | Process for increasing the oxygen yield from mixtures of chemicals | |
DE1544321A1 (en) | Board diffusion | |
DE1621494C (en) | Means for producing a protective coating for metal objects | |
SU901348A1 (en) | Composition for boron-copper plating of steel articles | |
EP0302439A3 (en) | Process for the preparation of acrylonitrile | |
DE2163476A1 (en) | PROCESS FOR INCREASING THE MECHANICAL STRENGTH OF GLASS-METAL FUSIONS BY CARBURIZING IRON AND IRON ALLOYS | |
DE1022016B (en) | Process for generating protective gas for soldering stoves | |
SU953000A1 (en) | Pulverulent composition for complex saturation of products | |
DE933787C (en) | Thermal process for metal extraction by reducing their oxygen compounds | |
DE89313C (en) | ||
DD139602A1 (en) | METHOD FOR GENERATING BOROID LAYERS FROM THE GAS PHASE | |
CH585278A5 (en) | Activation of mass transfer in gas hardening of metals - by introducing an additional gas at higher temperature into the furnace chamber | |
DE863068C (en) | Process for the manufacture of nitrogen-containing ferro alloys |