GB174580A - Improvements in a process for hardening steel alloys - Google Patents
Improvements in a process for hardening steel alloysInfo
- Publication number
- GB174580A GB174580A GB34237/21A GB3423721A GB174580A GB 174580 A GB174580 A GB 174580A GB 34237/21 A GB34237/21 A GB 34237/21A GB 3423721 A GB3423721 A GB 3423721A GB 174580 A GB174580 A GB 174580A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- chromium
- steel alloys
- alloys
- hardening steel
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
174,580. Krupp Akt.-Ges., F. Jan. 27, 1921, [Convention date]. Alloys.-Steel alloys and, in particular, those containing aluminium, chromium manganese and silicon are subjected to nitrogenization at temperatures below 580‹ C. By heating in a current of ammonia at 500‹ C., the Brinell hardness of a steel containing 0.39 per cent of carbon and 2.88 per cent of chromium is increased from 282 to 471. By similar treatment, the Brinell hardness of a steel containing 0.44 per cent of carbon. 1.07 per cent of manganese, and 1.93 per cent of chromium is increased from 298 to 500. Specification 19493/06, [Class 72, Iron &c.] is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE174580X | 1921-01-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB174580A true GB174580A (en) | 1923-01-25 |
Family
ID=5691417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB34237/21A Expired GB174580A (en) | 1921-01-27 | 1921-12-20 | Improvements in a process for hardening steel alloys |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR544736A (en) |
| GB (1) | GB174580A (en) |
-
1921
- 1921-12-20 GB GB34237/21A patent/GB174580A/en not_active Expired
- 1921-12-20 FR FR544736D patent/FR544736A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR544736A (en) | 1922-09-27 |
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