GB610514A - Improvements in or relating to the manufacture of iron powder and products produced therefrom - Google Patents
Improvements in or relating to the manufacture of iron powder and products produced therefromInfo
- Publication number
- GB610514A GB610514A GB9073/45A GB907345A GB610514A GB 610514 A GB610514 A GB 610514A GB 9073/45 A GB9073/45 A GB 9073/45A GB 907345 A GB907345 A GB 907345A GB 610514 A GB610514 A GB 610514A
- Authority
- GB
- United Kingdom
- Prior art keywords
- decomposition
- reduction
- hydrogen
- reducing gas
- manufacture
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
- B22F9/22—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
Iron powder, suitable for agglomeration in the cold, is made by decomposing iron formate by heat in a neutral or reducing atmosphere and, simultaneously or subsequently, submitting the products of the decomposition to a very far-reaching reduction by means of a reducing gas at a temperature between 500 DEG C. and 750 DEG C. The Specification states that a compression of 5-10 tons per sq. cm. produces goods with a density of about 7 gms. per c.c., with a Brinell figure of 130 and only about 10 per cent voids. The reducing atmosphere for the decomposition may be nitrogen or a mixture of carbon monoxide, carbon dioxide and hydrogen resulting from the decomposition and used under a partial vacuum, whilst the reducing gas for the reduction may be hydrogen, carbon monoxide, or a mixture of hydrogen and nitrogen, obtained by decomposing ammonia, the reduction of the decomposition products being down to about 1 per cent of oxygen. The decomposition may be effected at 325 DEG C. when it precedes the reduction, and the Specification contains examples of the times and rates of flow of reducing gas necessary for the reduction. The powder may be used for making cores of induction coils, or it may be used alone or mixed with other metallic powders, with or without a binding and insulating agent, for the manufacture of articles such as gears or bearings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR610514X | 1943-03-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB610514A true GB610514A (en) | 1948-10-18 |
Family
ID=8977464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9073/45A Expired GB610514A (en) | 1943-03-01 | 1945-04-11 | Improvements in or relating to the manufacture of iron powder and products produced therefrom |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB610514A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2651105A (en) * | 1942-04-07 | 1953-09-08 | Electro Chimie Metal | Manufacture of permanent magnets |
| US2689167A (en) * | 1948-08-06 | 1954-09-14 | Gen Electric Co Ltd | Production of gamma ferric oxide |
| US2879154A (en) * | 1956-10-02 | 1959-03-24 | Franklin Inst Of The State Of | Acicular metal particles and method of making the same |
| US3177077A (en) * | 1958-11-18 | 1965-04-06 | Commissariat Energie Atomique | Process for the manufacture of compact or fine-pored metallic compositions by agglomerating particulate metals |
| WO1999059755A1 (en) * | 1998-05-20 | 1999-11-25 | H.C. Starck Gmbh & Co. Kg | Sinter-active metal and alloy powders for powder metallurgy applications and methods for their production and their use |
-
1945
- 1945-04-11 GB GB9073/45A patent/GB610514A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2651105A (en) * | 1942-04-07 | 1953-09-08 | Electro Chimie Metal | Manufacture of permanent magnets |
| US2689167A (en) * | 1948-08-06 | 1954-09-14 | Gen Electric Co Ltd | Production of gamma ferric oxide |
| US2879154A (en) * | 1956-10-02 | 1959-03-24 | Franklin Inst Of The State Of | Acicular metal particles and method of making the same |
| US3177077A (en) * | 1958-11-18 | 1965-04-06 | Commissariat Energie Atomique | Process for the manufacture of compact or fine-pored metallic compositions by agglomerating particulate metals |
| WO1999059755A1 (en) * | 1998-05-20 | 1999-11-25 | H.C. Starck Gmbh & Co. Kg | Sinter-active metal and alloy powders for powder metallurgy applications and methods for their production and their use |
| US6554885B1 (en) | 1998-05-20 | 2003-04-29 | H. C. Starck Gmbh | Pre-alloyed powder |
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