GB486232A - Improvements in case-hardening iron and steel and in salt baths therefor - Google Patents
Improvements in case-hardening iron and steel and in salt baths thereforInfo
- Publication number
- GB486232A GB486232A GB6373/37A GB637337A GB486232A GB 486232 A GB486232 A GB 486232A GB 6373/37 A GB6373/37 A GB 6373/37A GB 637337 A GB637337 A GB 637337A GB 486232 A GB486232 A GB 486232A
- Authority
- GB
- United Kingdom
- Prior art keywords
- case
- salt
- steel
- bath
- barium
- 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)
- Electrolytic Production Of Metals (AREA)
Abstract
A salt bath for case-hardening iron and steel comprises 10-50, preferably 15-45, per cent of sodium cyanide, 15-60, preferably 25-30, of barium carbonate, 4-15 of activated carbon of low combustibility, and from 15-70 of a salt molten at the case-hardening temperature, such as sodium or potassium chloride or a mixture of these salts, the amount of this salt being such as to render the bath molten. Barium oxide may be used instead of barium carbonate and the bath may also contain 15-30 per cent of barium chloride. The activated carbon may be that prepared by the processes described in German Specifications 453,972, 466,358, and 488,669. British Specification 386,076 and U.S.A. Specification 2,025,050 also are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US486232XA | 1936-03-19 | 1936-03-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB486232A true GB486232A (en) | 1938-06-01 |
Family
ID=21955548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6373/37A Expired GB486232A (en) | 1936-03-19 | 1937-03-03 | Improvements in case-hardening iron and steel and in salt baths therefor |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB486232A (en) |
-
1937
- 1937-03-03 GB GB6373/37A patent/GB486232A/en not_active Expired
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