US2979810A - Rotating bands for projectiles and methods for making the same - Google Patents
Rotating bands for projectiles and methods for making the same Download PDFInfo
- Publication number
- US2979810A US2979810A US652686A US65268657A US2979810A US 2979810 A US2979810 A US 2979810A US 652686 A US652686 A US 652686A US 65268657 A US65268657 A US 65268657A US 2979810 A US2979810 A US 2979810A
- Authority
- US
- United States
- Prior art keywords
- projectiles
- rotating bands
- iron
- making
- rotating
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 title description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 31
- 229910052802 copper Inorganic materials 0.000 description 9
- 239000010949 copper Substances 0.000 description 9
- 229910052742 iron Inorganic materials 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 238000005245 sintering Methods 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 238000005121 nitriding Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
- F42B14/02—Driving bands; Rotating bands
-
- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/14—Treatment of metallic powder
- B22F1/145—Chemical treatment, e.g. passivation or decarburisation
-
- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/17—Metallic particles coated with metal
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0207—Using a mixture of prealloyed powders or a master alloy
- C22C33/0228—Using a mixture of prealloyed powders or a master alloy comprising other non-metallic compounds or more than 5% of graphite
Definitions
- the present invention relates to rotating bands for projectiles.
- said bands have been generally made of copper.
- This metal has physical characteristics which comply particularly well with the requirements for rotating bands.
- copper is a relatively rare and expensive metal and it is desirable to be able to replace it by other materials. This is why rotating bands for projectiles have been made of soft iron and in particular sintered iron and such rotating bands have proved to be satisfactory for an average and high shell velocities and firing rates.
- the object of my invention is to provide a rotating band for projectiles which is free from these drawbacks.
- the rotating band according to my inven tion is essentially constituted by a soft nitrided iron powder sintered to the designed shape.
- I add to said powder from 0.8 to 2.0% by weight of copper to the iron powder.
- this copper is added by subjecting the iron powder to a chemical copper depositing treatment.
- Example An iron powder suitable for sintering and having for instance a grain size ranging from 0.1 to 0.15 mm. in diameter is treated in a stream of ammonia gas at a temperature ranging from 300 to 400 C.
- the powder undergoing this treatment is stirred by the gaseous stream which forms eddies in the treatment chamber and if the treatment is performed in this way, it may be completed in about fifteen minutes.
- the iron powder thus treated is chemically coated with copper.
- a protective gas such as nitrogen
- Rotating bands obtained as above stated can be machined without difficulties if it is found necessary.
- a process of making a rotating band for a projectile comprising forming a mass of substantially pure iron powder of suitable character for sintering, contacting the mass of powder with gaseous ammonia at a temperature of about 300400 C, to soft nitride the powder, and compacting and sintering the soft nitrided iron powder to the shape of said rotating band.
- a rotating band for a projectile made by the process of claim 1.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Powder Metallurgy (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH812235X | 1956-04-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2979810A true US2979810A (en) | 1961-04-18 |
Family
ID=4538600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US652686A Expired - Lifetime US2979810A (en) | 1956-04-15 | 1957-04-15 | Rotating bands for projectiles and methods for making the same |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US2979810A (OSRAM) |
| BE (1) | BE556476A (OSRAM) |
| CH (1) | CH346460A (OSRAM) |
| DE (1) | DE1036114B (OSRAM) |
| FR (1) | FR1171194A (OSRAM) |
| GB (1) | GB812235A (OSRAM) |
| NL (2) | NL216283A (OSRAM) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3256818A (en) * | 1955-11-26 | 1966-06-21 | Berghaus Bernhard | Method of reducing barrel wear |
| SE441305B (sv) * | 1979-03-07 | 1985-09-23 | Bofors Ab | Sett att festa en projektils gordel medelst friktionssvetning |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2323162A (en) * | 1940-11-26 | 1943-06-29 | Gen Motors Corp | Flatiron base |
| US2411073A (en) * | 1944-08-16 | 1946-11-12 | Isthmian Metals Inc | Making products of iron or iron alloys |
| US2483075A (en) * | 1944-12-15 | 1949-09-27 | New Jersey Zinc Co | Method of copper coating iron particles |
| US2666724A (en) * | 1952-12-03 | 1954-01-19 | Gen Aniline & Film Corp | Process of preparing iron powder of improved electromagnetic properties |
| US2812276A (en) * | 1953-06-29 | 1957-11-05 | Int Nickel Co | High frequency cores |
-
0
- NL NL99102D patent/NL99102C/xx active
- NL NL216283D patent/NL216283A/xx unknown
- BE BE556476D patent/BE556476A/xx unknown
-
1956
- 1956-04-15 CH CH346460D patent/CH346460A/de unknown
-
1957
- 1957-04-05 DE DEH29820A patent/DE1036114B/de active Pending
- 1957-04-08 GB GB11406/57A patent/GB812235A/en not_active Expired
- 1957-04-12 FR FR1171194D patent/FR1171194A/fr not_active Expired
- 1957-04-15 US US652686A patent/US2979810A/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2323162A (en) * | 1940-11-26 | 1943-06-29 | Gen Motors Corp | Flatiron base |
| US2411073A (en) * | 1944-08-16 | 1946-11-12 | Isthmian Metals Inc | Making products of iron or iron alloys |
| US2483075A (en) * | 1944-12-15 | 1949-09-27 | New Jersey Zinc Co | Method of copper coating iron particles |
| US2666724A (en) * | 1952-12-03 | 1954-01-19 | Gen Aniline & Film Corp | Process of preparing iron powder of improved electromagnetic properties |
| US2812276A (en) * | 1953-06-29 | 1957-11-05 | Int Nickel Co | High frequency cores |
Also Published As
| Publication number | Publication date |
|---|---|
| CH346460A (de) | 1960-05-15 |
| NL216283A (OSRAM) | |
| NL99102C (OSRAM) | |
| DE1036114B (de) | 1958-08-07 |
| BE556476A (OSRAM) | |
| FR1171194A (fr) | 1959-01-22 |
| GB812235A (en) | 1959-04-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Angers et al. | Hot-pressing of boron carbide | |
| US2411073A (en) | Making products of iron or iron alloys | |
| US2804410A (en) | Method for nitriding titanium surfaces | |
| US2933386A (en) | Method of sintering and nitriding ferrous bodies | |
| US3117041A (en) | Heat treated steel article | |
| US3668951A (en) | Force-applying tools | |
| US2979810A (en) | Rotating bands for projectiles and methods for making the same | |
| US2489839A (en) | Process for carburizing compacted iron articles | |
| US3357827A (en) | Method of producing metal alloys having a high nitrogen content | |
| US2994600A (en) | Iron powder for making sintered iron articles | |
| US3549357A (en) | Dry impact coating of powder metal parts | |
| JPS55138006A (en) | Preparation of sintered friction material | |
| US2778757A (en) | Carburized tungsten alloy article | |
| US3219494A (en) | Method of making high-strength tin plate | |
| US2489838A (en) | Powder metallurgy process for producing steel parts | |
| CA3132343C (en) | Iron-based mixed powder for powder metallurgy and iron-based sintered body | |
| JPS597325B2 (ja) | 鋳鋼ショットの製造方法 | |
| US2960421A (en) | Elimination of white layer in nitrided steel | |
| US2495823A (en) | Pressing of articles from metal powder | |
| US2791498A (en) | Method of improving metal powders | |
| US3595709A (en) | Process for producing ferrochrome alloys with high nitrogen content and low carbon content | |
| CN105063589B (zh) | 一种金属用磷化亚铁锂耐高温磷化膜材料的制备方法 | |
| US2989429A (en) | Method of making manganese-nitrogen pre-alloy | |
| US1736921A (en) | Case nitrification of steel | |
| US1808355A (en) | Method of nitrification |