GB404180A - Improvements in and relating to the treatment of iron castings to improve their physical characteristics - Google Patents
Improvements in and relating to the treatment of iron castings to improve their physical characteristicsInfo
- Publication number
- GB404180A GB404180A GB1107633A GB1107633A GB404180A GB 404180 A GB404180 A GB 404180A GB 1107633 A GB1107633 A GB 1107633A GB 1107633 A GB1107633 A GB 1107633A GB 404180 A GB404180 A GB 404180A
- Authority
- GB
- United Kingdom
- Prior art keywords
- iron
- mixture
- heating
- castings
- 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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
- C23C10/34—Embedding in a powder mixture, i.e. pack cementation
- C23C10/52—Embedding in a powder mixture, i.e. pack cementation more than one element being diffused in one step
- C23C10/54—Diffusion of at least chromium
- C23C10/56—Diffusion of at least chromium and at least aluminium
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Iron castings are converted into malleable iron and provided with a hard surface layer resistant to oxidation at high temperatures by heating them to a temperature between 800 DEG and 1150 DEG C. in contact with a mixture of aluminium, alumina, one or more carbides of a metal or metalloid, e.g. calcium carbide or carborundum, and preferably also a small proportion of anhydrous chromic chloride. Air is excluded during the heating and is preferably expelled by the addition to the mixture of 1-2 per cent of ammonium chloride. After heating for from 3-5 hours the castings are allowed to cool slowly. A surface layer is formed comprising an alloy of iron, aluminium, and the metal or metalloid of the carbide, together with chromium if chromic chloride is included in the mixture. Specification 337,562, [Class 72, Iron &c.], is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1107633A GB404180A (en) | 1933-04-13 | 1933-04-13 | Improvements in and relating to the treatment of iron castings to improve their physical characteristics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1107633A GB404180A (en) | 1933-04-13 | 1933-04-13 | Improvements in and relating to the treatment of iron castings to improve their physical characteristics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB404180A true GB404180A (en) | 1934-01-11 |
Family
ID=9979576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1107633A Expired GB404180A (en) | 1933-04-13 | 1933-04-13 | Improvements in and relating to the treatment of iron castings to improve their physical characteristics |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB404180A (en) |
-
1933
- 1933-04-13 GB GB1107633A patent/GB404180A/en not_active Expired
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