GB961020A - Process for the manufacture of an iron-chromium alloy - Google Patents
Process for the manufacture of an iron-chromium alloyInfo
- Publication number
- GB961020A GB961020A GB2589459A GB2589459A GB961020A GB 961020 A GB961020 A GB 961020A GB 2589459 A GB2589459 A GB 2589459A GB 2589459 A GB2589459 A GB 2589459A GB 961020 A GB961020 A GB 961020A
- Authority
- GB
- United Kingdom
- Prior art keywords
- iron
- chromium
- chromium alloy
- manufacture
- box
- 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
- C23C10/36—Embedding in a powder mixture, i.e. pack cementation only one element being diffused
- C23C10/38—Chromising
- C23C10/40—Chromising of ferrous surfaces
- C23C10/42—Chromising of ferrous surfaces in the presence of volatile transport additives, e.g. halogenated substances
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
An iron-chromium alloy is produced by subjecting a sheet of mild steel or wrought iron to chromium diffusion in the presence of nitrous oxide under conditions such that not less than 20% by weight of the iron is replaced by chromium. The sheet is preferably not more than 0.008 inch thick and should not contain more than 0.05%P, 0.05%S, 0.5%Mn, 0.15%Si and 0.12%C. The diffusion is effected in a box, sealed as described in Specification 939,801 and filled with a mixture of sand, chromium powder and ammonium nitrate (to generate the nitrous oxide). The mixture may also contain ammonium chloride and ammonium fluoride. After heating to 1050-1400 DEG C. the box may be cooled under the canopy described in Specification 909,137.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2589459A GB961020A (en) | 1959-07-28 | 1959-07-28 | Process for the manufacture of an iron-chromium alloy |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2589459A GB961020A (en) | 1959-07-28 | 1959-07-28 | Process for the manufacture of an iron-chromium alloy |
Publications (1)
Publication Number | Publication Date |
---|---|
GB961020A true GB961020A (en) | 1964-06-17 |
Family
ID=10235087
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2589459A Expired GB961020A (en) | 1959-07-28 | 1959-07-28 | Process for the manufacture of an iron-chromium alloy |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB961020A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998011269A1 (en) * | 1996-09-12 | 1998-03-19 | Alon, Inc. | Chromium and silicon diffusion coating |
-
1959
- 1959-07-28 GB GB2589459A patent/GB961020A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998011269A1 (en) * | 1996-09-12 | 1998-03-19 | Alon, Inc. | Chromium and silicon diffusion coating |
US5972429A (en) * | 1996-09-12 | 1999-10-26 | Alon, Inc. | Chromium-silicon diffusion coating |
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