DE893601C - Process for the production of diffusion coatings - Google Patents
Process for the production of diffusion coatingsInfo
- Publication number
- DE893601C DE893601C DEK2845D DEK0002845D DE893601C DE 893601 C DE893601 C DE 893601C DE K2845 D DEK2845 D DE K2845D DE K0002845 D DEK0002845 D DE K0002845D DE 893601 C DE893601 C DE 893601C
- Authority
- DE
- Germany
- Prior art keywords
- production
- application
- iron
- diffusion coatings
- objects
- 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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/06—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases
- C23C10/08—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases only one element being diffused
- C23C10/10—Chromising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Powder Metallurgy (AREA)
- Sliding-Contact Bearings (AREA)
Description
Verfahren zur Herstellung von Diffusionsüberzügen Zusatz zum Patent ö'8'9086 Den Gegenstand des Patents 88o o86 bildet ein Verfahren zur Herstellung von Diffusionsüberzügen, z. B. Chromüberzügen, auf Metallgegenständen, insbesondere Gegenständen aus Eisen oder Stahl, das darin besteht, daß homogene, sich nicht entmischende reine Chloridgase bei Unterdrücken von weniger als 5oa mm Quecksilbersäule, insbesondere von !2o bis aoo mm Quecksilbersäule, und bei erhöhten Temperaturen, insbesondere Temperaturen von goo bis iioo° C, zur Anwendung gebracht werden.Process for the production of diffusion coatings. Patent addendum ö'8'9086 The subject of the patent 88o o86 is a process for production of diffusion coatings, e.g. B. chrome coatings, on metal objects, in particular Objects made of iron or steel, which consists in being homogeneous, non-segregating pure chloride gases at pressures of less than 50 mm of mercury, in particular from! 2o to aoo mm of mercury, and at elevated temperatures, in particular Temperatures from goo to iioo ° C can be used.
Es hat sich nun gezeigt, daß dieses bei massiven eisernen Gegenständen erprobte Verfahren auch auf Sinterteile anwendbar ist, die ganz oder in der Hauptsache- aus Eisen bestehen. Diese Feststellung ist um so überraschender, als man hätte annehmen können, daß der Zusammenhang bzw. die Festigkeit der Sinterteile, da diese mehr oder weniger porös sind, durch die Behandlung mit den Chloridgasen bei Unterdruck gestört werden würde.It has now been shown that this is the case with massive iron objects proven process can also be applied to sintered parts that are wholly or mainly consist of iron. This finding is all the more surprising than it would have been expected can that the connection or the strength of the sintered parts, since these more or are less porous due to the treatment with the chloride gases under reduced pressure would be disturbed.
Die Anwendung des in Rede stehenden Verfahrens auf Sinterteile ist ferner mit dem Vorteil verbunden, daß die Herstellung der Teile, d. h. die Sinterung, für die Temperaturen von etwa iooo bis 1300° C erforderlich sind, mit der für die Behandfun.g mit den Chloridgasen erforderlichen Erhitzung in einem Arbeitsgang vereinigt werden kann, so daß eine besonders wirtschaftliche Arbeitsweise gewährleistet ist. Bcsonders vorteilhafte Anwendungsgebiete der Erfindung sind. Gegenstände, die auf gleitende Reibung beansprucht werden und gleichzeitig eine gute Korrosionswiderstandsfähigkeit haben sollen, also beispielsweise chromierte Lagerschalen, Zahnräder, ü. dgl.The application of the method in question to sintered parts is also associated with the advantage that the production of the parts, i.e. H. the sintering, for which temperatures of about 100 to 1300 ° C. are required, can be combined in one operation with the heating required for the treatment with the chloride gases, so that a particularly economical method of operation is guaranteed. Particularly advantageous areas of application of the invention are. Objects that are subjected to sliding friction and at the same time should have good corrosion resistance, for example chromed bearing shells, gears, etc. like
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK2845D DE893601C (en) | 1943-10-21 | 1943-10-21 | Process for the production of diffusion coatings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK2845D DE893601C (en) | 1943-10-21 | 1943-10-21 | Process for the production of diffusion coatings |
Publications (1)
Publication Number | Publication Date |
---|---|
DE893601C true DE893601C (en) | 1953-10-19 |
Family
ID=7209622
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEK2845D Expired DE893601C (en) | 1943-10-21 | 1943-10-21 | Process for the production of diffusion coatings |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE893601C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1189723B (en) * | 1953-02-04 | 1965-03-25 | Onera (Off Nat Aerospatiale) | Process for sintering and simultaneous diffusion metallization of molded parts |
-
1943
- 1943-10-21 DE DEK2845D patent/DE893601C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1189723B (en) * | 1953-02-04 | 1965-03-25 | Onera (Off Nat Aerospatiale) | Process for sintering and simultaneous diffusion metallization of molded parts |
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