GB648242A - Graphitic alloy steels and nitrided products made therefrom - Google Patents
Graphitic alloy steels and nitrided products made therefromInfo
- Publication number
- GB648242A GB648242A GB11437/45A GB1143745A GB648242A GB 648242 A GB648242 A GB 648242A GB 11437/45 A GB11437/45 A GB 11437/45A GB 1143745 A GB1143745 A GB 1143745A GB 648242 A GB648242 A GB 648242A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- heating
- sufficient time
- steel
- products made
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
A graphitizible alloy steel has the following composition C 1.0-2.0 per cent, Mn 0.2 -1.0 per cent, A1 0.5-2.5 per cent, Si 0.5-1.75 per cent, Cr 0.2-1.0 per cent, Fe, with the usual impurities, the remainder. The alloy may also contain one or more of the following elements: V 0.1-0.3 per cent, Zr up to 0.5 per cent, Nb up to 0.3 per cent and Cu 0.25-1.5 per cent. The steels are graphitized by heating to above the AC3 point for sufficient time to produce an austenitic structure, cooling rapidly to room temperature and heating to a temperature near to but below the Ac point for sufficient time to graphitize the steel leaving 0.2-0.8 per cent of combined carbon. The steel so treated may be nitrided by heating in contact with a nitrogen-liberating agent for sufficient time to produce a nitride case of the desired depth. Specifications 338,655, 344,500 and 443,446 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US648242XA | 1944-05-04 | 1944-05-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB648242A true GB648242A (en) | 1951-01-03 |
Family
ID=22058463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11437/45A Expired GB648242A (en) | 1944-05-04 | 1945-05-04 | Graphitic alloy steels and nitrided products made therefrom |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB648242A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1987001735A1 (en) * | 1985-09-19 | 1987-03-26 | Sherby Oleg D | Ultrahigh carbon steels containing aluminum, and processing thereof |
-
1945
- 1945-05-04 GB GB11437/45A patent/GB648242A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1987001735A1 (en) * | 1985-09-19 | 1987-03-26 | Sherby Oleg D | Ultrahigh carbon steels containing aluminum, and processing thereof |
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