GB717937A - Heat treatment baths - Google Patents
Heat treatment bathsInfo
- Publication number
- GB717937A GB717937A GB2789751A GB2789751A GB717937A GB 717937 A GB717937 A GB 717937A GB 2789751 A GB2789751 A GB 2789751A GB 2789751 A GB2789751 A GB 2789751A GB 717937 A GB717937 A GB 717937A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alkali metal
- per cent
- bath
- heat treatment
- weight
- 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
- C23C8/40—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 liquids, e.g. salt baths, liquid suspensions
- C23C8/42—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 liquids, e.g. salt baths, liquid suspensions only one element being applied
- C23C8/44—Carburising
- C23C8/46—Carburising of ferrous surfaces
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
A fused salt bath for the heat treatment of steels and alloy steels consists of more than 50 per cent. by weight of an alkali metal halide or a mixture of alkali metal halides, a smaller proportion of an alkali metal cyanide, and from 0.25 per cent. to 5.0 per cent. of silicon. It is preferred to include in the alkali metal halides an alkali metal fluoride, e.g. less than 10 per cent. by weight of the bath of sodium fluoride. Up to 15 per cent. by weight of the bath of alkali metal cyanide may be used. The bath may be operated at 800-950 DEG C. and may be provided with a protective layer of graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2789751A GB717937A (en) | 1951-11-28 | 1951-11-28 | Heat treatment baths |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2789751A GB717937A (en) | 1951-11-28 | 1951-11-28 | Heat treatment baths |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB717937A true GB717937A (en) | 1954-11-03 |
Family
ID=10267045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2789751A Expired GB717937A (en) | 1951-11-28 | 1951-11-28 | Heat treatment baths |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB717937A (en) |
-
1951
- 1951-11-28 GB GB2789751A patent/GB717937A/en not_active Expired
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