GB176576A - Improvements in the heat treatment of steel - Google Patents
Improvements in the heat treatment of steelInfo
- Publication number
- GB176576A GB176576A GB119421A GB119421A GB176576A GB 176576 A GB176576 A GB 176576A GB 119421 A GB119421 A GB 119421A GB 119421 A GB119421 A GB 119421A GB 176576 A GB176576 A GB 176576A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxygen
- steel
- completed
- surface layer
- air
- 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
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
176,576. Kubasta, J. C. M. Jan. 10, 1921. Cementation.-In heat-treating steel, the formation of a soft skin due to decarburization of the surface layer is prevented by carrying out the beating-process in the presence of oxidizing gases, preferably oxygen, in sufficient quantity so that not only is the carbon removed but the iron in the surface layer is converted into ferrous or ferric oxide so that the new metallic surface is of normal carbon content. The steel is heated in a soft-iron vessel and when the first critical point is reached, oxygen is supplied. After the treatment is completed, the supply is continued to flush out the gases liberated and then stopped. The oxygen remaining is consumed by conversion of the ferrous oxide produced into ferric oxide and, owing to a vacuum being produced, air is drawn into the heating-vessel the oxygen of the air being similarly consumed leaving an inert nitrogen atmosphere in which the cooling is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB119421A GB176576A (en) | 1921-01-10 | 1921-01-10 | Improvements in the heat treatment of steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB119421A GB176576A (en) | 1921-01-10 | 1921-01-10 | Improvements in the heat treatment of steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB176576A true GB176576A (en) | 1922-03-16 |
Family
ID=9717795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB119421A Expired GB176576A (en) | 1921-01-10 | 1921-01-10 | Improvements in the heat treatment of steel |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB176576A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113234897A (en) * | 2021-04-16 | 2021-08-10 | 石美 | Heat treatment device with overheat protection function for machining center |
-
1921
- 1921-01-10 GB GB119421A patent/GB176576A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113234897A (en) * | 2021-04-16 | 2021-08-10 | 石美 | Heat treatment device with overheat protection function for machining center |
| CN113234897B (en) * | 2021-04-16 | 2023-12-22 | 石美 | Heat treatment device with overheat protection function for machining center |
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