GB637635A - Improvements in or relating to the case hardening of steel - Google Patents
Improvements in or relating to the case hardening of steelInfo
- Publication number
- GB637635A GB637635A GB1108148A GB1108148A GB637635A GB 637635 A GB637635 A GB 637635A GB 1108148 A GB1108148 A GB 1108148A GB 1108148 A GB1108148 A GB 1108148A GB 637635 A GB637635 A GB 637635A
- Authority
- GB
- United Kingdom
- Prior art keywords
- steel
- bath
- case hardening
- iron
- relating
- 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)
- Cosmetics (AREA)
Abstract
In the case hardening of steel in a fused cyanide bath in which copper is present, the inhibiting action of the copper is prevented by the addition to the bath of an iron compound or metallic iron in a finely divided state. The iron may be added alone or mixed with the regenerator salt for the bath in an amount not exceeding 10 per cent. Suitable compounds are ferric oxide or potassium ferrocyanide. Specifications 359,483 and 424,003 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1108148A GB637635A (en) | 1948-04-22 | 1948-04-22 | Improvements in or relating to the case hardening of steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1108148A GB637635A (en) | 1948-04-22 | 1948-04-22 | Improvements in or relating to the case hardening of steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB637635A true GB637635A (en) | 1950-05-24 |
Family
ID=9979678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1108148A Expired GB637635A (en) | 1948-04-22 | 1948-04-22 | Improvements in or relating to the case hardening of steel |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB637635A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3719518A (en) * | 1969-11-01 | 1973-03-06 | Toyoda Chuo Kenkyusho Kk | Process of forming a carbide layer of vanadium, niobium or tantalum upon a steel surface |
-
1948
- 1948-04-22 GB GB1108148A patent/GB637635A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3719518A (en) * | 1969-11-01 | 1973-03-06 | Toyoda Chuo Kenkyusho Kk | Process of forming a carbide layer of vanadium, niobium or tantalum upon a steel surface |
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