GB369918A - Improvements in or relating to the treatment of steel alloys - Google Patents
Improvements in or relating to the treatment of steel alloysInfo
- Publication number
- GB369918A GB369918A GB3496930A GB3496930A GB369918A GB 369918 A GB369918 A GB 369918A GB 3496930 A GB3496930 A GB 3496930A GB 3496930 A GB3496930 A GB 3496930A GB 369918 A GB369918 A GB 369918A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- ammonia
- heated
- heating
- steel alloys
- 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
- C23C8/06—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 gases
- C23C8/08—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 gases only one element being applied
- C23C8/24—Nitriding
- C23C8/26—Nitriding 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)
- Catalysts (AREA)
Abstract
Steel alloys containing 9-17 per cent of manganese, 2,5-10 per cent of nickel, and up to 1 per cent of carbon, and if desired from 0,1 to 10 per cent of one or more additional elements such as silicon, chromium, tungsten, aluminium, copper, molybdenum, cobalt, vanadium, titanium, or zirconium are nitrogenized by heating at a temperature from 500 or 550 DEG C and upwards to 650-680 DEG C. in the presence of ammonia or a substance from which ammonia is evolved when heated. The heating may be carried at one or different temperatures. Before the nitrogenization, the alloys are toughened by heating to 900-1000 DEG C. and quenched. In an example, an alloy containing 0,71 per cent of carbon, 1,27 of silicon, 12,8 of manganese, 0,15 of chromium, 2,83 of nickel, and 0,18 of copper was first heated to 1000 DEG C. and cooled in air. The alloy was then heated for 48 hours in ammonia at 530-595 DEG C. of which 40 hours were at 560-585 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3496930A GB369918A (en) | 1930-11-20 | 1930-11-20 | Improvements in or relating to the treatment of steel alloys |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3496930A GB369918A (en) | 1930-11-20 | 1930-11-20 | Improvements in or relating to the treatment of steel alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB369918A true GB369918A (en) | 1932-03-21 |
Family
ID=10372242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3496930A Expired GB369918A (en) | 1930-11-20 | 1930-11-20 | Improvements in or relating to the treatment of steel alloys |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB369918A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2745777A (en) * | 1951-12-20 | 1956-05-15 | Armco Steel Corp | Internal combustion engine valves and the like |
| DE1217075B (en) * | 1959-07-15 | 1966-05-18 | Universal Cyclops Steel Corp | Austenitic hardenable steel alloy |
| US4377422A (en) * | 1980-09-12 | 1983-03-22 | Queen's University At Kingston | Hadfield's steel containing 2% vanadium |
-
1930
- 1930-11-20 GB GB3496930A patent/GB369918A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2745777A (en) * | 1951-12-20 | 1956-05-15 | Armco Steel Corp | Internal combustion engine valves and the like |
| DE1217075B (en) * | 1959-07-15 | 1966-05-18 | Universal Cyclops Steel Corp | Austenitic hardenable steel alloy |
| US4377422A (en) * | 1980-09-12 | 1983-03-22 | Queen's University At Kingston | Hadfield's steel containing 2% vanadium |
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