GB573564A - Improvements in or relating to the decarburisation of powders containing carbides - Google Patents
Improvements in or relating to the decarburisation of powders containing carbidesInfo
- Publication number
- GB573564A GB573564A GB260342A GB260342A GB573564A GB 573564 A GB573564 A GB 573564A GB 260342 A GB260342 A GB 260342A GB 260342 A GB260342 A GB 260342A GB 573564 A GB573564 A GB 573564A
- Authority
- GB
- United Kingdom
- Prior art keywords
- atmosphere
- per cent
- oxygen
- carbon dioxide
- temperature
- 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
- C21D5/00—Heat treatments of cast-iron
- C21D5/04—Heat treatments of cast-iron of white cast-iron
- C21D5/06—Malleabilising
- C21D5/08—Malleabilising with oxidation of carbon
- C21D5/10—Malleabilising with oxidation of carbon in gaseous agents
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)
- Carbon And Carbon Compounds (AREA)
Abstract
573,564. Boron. JONES, W. D., and ROBIETTE, A. G. E. Feb. 27, 1943, No. 2603. [Class 90] [Also in Group II] Powders containing boron-carbide are decarburised by being subjected at a temperature between 750‹ and 1,100‹C. to an atmosphere containing by volume 5-25 per cent. of hydrogen, not more than 8 per cent. water-vapour, 2.5-9.0 per cent. carbon dioxide, 5-30 per cent, carbon monoxide, the balance being mainly or wholly nitrogen. The atmosphere may be produced by the partial combustion, followed by partial dehydration of coal gas, coke oven gas or hydrocarbons such as methane, propane or butane and the used atmosphere re-circulated, controlled amounts of oxygen or oxygen-containing gases such as air being added to restore the carbon dioxide content. After treatment the powder may be cooled in the same atmosphere or in a reducing atmosphere such as cracked ammonia or may be sintered by increasing the temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB260342A GB573564A (en) | 1942-02-27 | 1942-02-27 | Improvements in or relating to the decarburisation of powders containing carbides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB260342A GB573564A (en) | 1942-02-27 | 1942-02-27 | Improvements in or relating to the decarburisation of powders containing carbides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB573564A true GB573564A (en) | 1945-11-27 |
Family
ID=9742474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB260342A Expired GB573564A (en) | 1942-02-27 | 1942-02-27 | Improvements in or relating to the decarburisation of powders containing carbides |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB573564A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2856269A (en) * | 1956-02-28 | 1958-10-14 | Sylvania Electric Prod | Purifying induction lamp target |
-
1942
- 1942-02-27 GB GB260342A patent/GB573564A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2856269A (en) * | 1956-02-28 | 1958-10-14 | Sylvania Electric Prod | Purifying induction lamp target |
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