GB644465A - Process of case-hardening metals and their alloys - Google Patents
Process of case-hardening metals and their alloysInfo
- Publication number
- GB644465A GB644465A GB35036/47A GB3503647A GB644465A GB 644465 A GB644465 A GB 644465A GB 35036/47 A GB35036/47 A GB 35036/47A GB 3503647 A GB3503647 A GB 3503647A GB 644465 A GB644465 A GB 644465A
- Authority
- GB
- United Kingdom
- Prior art keywords
- silicon
- carbon
- per cent
- compounds
- metal
- 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
- C23C12/00—Solid state diffusion of at least one non-metal element other than silicon and at least one metal element or silicon into metallic material surfaces
- C23C12/02—Diffusion in one step
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
A metal article, capable of cementation by carbon and silicon, is case-hardened by heating it in the presence of an organic silicon compond which contains at least one carbon atom of an organic radical united to silicon and which decomposes at the treatment temperature. The compounds used may be organo-silicon oxides, ethers and diethers, hydrides and chlorides, silicols or polymeric silicones and, by selection of the compounds the ratio of carbon to silicon may be varied. The compounds may be decomposed on contact with the metal or previously decomposed or used in conjunction with a reducing or inert gas, which latter may also be used to produce a pressure higher than atmospheric. The metal may be immediately quenched or cooled in air and reheated and quenched. The silicon content may be over 7 per cent but a silicon of over 1.5 per cent and a carbon of not above 2.2 per cent in the surface is preferred. If the silicon/carbon ratio is high free silicon may be deposited on the surface.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US644465XA | 1944-02-04 | 1944-02-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB644465A true GB644465A (en) | 1950-10-11 |
Family
ID=22056037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB35036/47A Expired GB644465A (en) | 1944-02-04 | 1947-12-31 | Process of case-hardening metals and their alloys |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB644465A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2854446A (en) * | 1952-10-29 | 1958-09-30 | Rhodiaceta | Process for the continuous production of cellulose esters |
-
1947
- 1947-12-31 GB GB35036/47A patent/GB644465A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2854446A (en) * | 1952-10-29 | 1958-09-30 | Rhodiaceta | Process for the continuous production of cellulose esters |
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