GB1321947A - Process for producing a cemented tungsten carbide composition - Google Patents
Process for producing a cemented tungsten carbide compositionInfo
- Publication number
- GB1321947A GB1321947A GB2585171*A GB2585171A GB1321947A GB 1321947 A GB1321947 A GB 1321947A GB 2585171 A GB2585171 A GB 2585171A GB 1321947 A GB1321947 A GB 1321947A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tungsten
- hydrogen
- produced
- tungsten carbide
- mixture
- 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
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/90—Carbides
- C01B32/914—Carbides of single elements
- C01B32/949—Tungsten or molybdenum carbides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/21—Attrition-index or crushing strength of granulates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
1321947 Tungsten carbide compositions REDERI AB NORDSTJERNAN 19 April 1971 [2 April 1970] 25851/71 Heading C1A [Also in Division C7] Cemented tungsten carbide compositions with an improved combination of high bending strength with high hardness are produced from tungsten produced by a non plasma reduction process by reducing a preheated unreacted mixture of tungsten halide gas and a reducing gas consisting mainly of hydrogen at a temperature above the reaction temperature for said mixture and then immediately feeding said preheated mixture into a reaction chamber, carburizing the tungsten powder so produced and then sintering the carbide with a binder metal. In examples, tungsten hexachloride gas at 400‹ C. is mixed with hydrogen at 525‹ C. in a nickel tube leading to a reaction chamber at 1000‹ C. The tungsten powder produced is mixed with carbon and heated to 1650‹ C. in hydrogen or is carburized at 1450‹ in a carbon tube furnace. The tungsten carbide is ball milled with 2-30 wt. per cent cobalt and 2 wt. per cent wax, pressed, presintered at 950‹C. in hydrogen and then sintered in vacuum at 1300-1500‹ C. Alternative binder metals comprise Fe or Ni or an alloy of Co, Fe and/or Ni. Ti and Ta carbides may also be present.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE453070 | 1970-04-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1321947A true GB1321947A (en) | 1973-07-04 |
Family
ID=20264402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2585171*A Expired GB1321947A (en) | 1970-04-02 | 1971-04-19 | Process for producing a cemented tungsten carbide composition |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3713789A (en) |
| JP (1) | JPS5218209B1 (en) |
| DE (1) | DE2115999B2 (en) |
| FR (1) | FR2089133A5 (en) |
| GB (1) | GB1321947A (en) |
| ZA (1) | ZA712016B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3816081A (en) * | 1973-01-26 | 1974-06-11 | Gen Electric | ABRASION RESISTANT CEMENTED TUNGSTEN CARBIDE BONDED WITH Fe-C-Ni-Co |
| US4257741A (en) * | 1978-11-02 | 1981-03-24 | General Electric Company | Turbine engine blade with airfoil projection |
| US4402737A (en) * | 1982-09-01 | 1983-09-06 | Gte Products Corporation | Method of producing tungsten and tungsten carbide powder |
| US5746803A (en) * | 1996-06-04 | 1998-05-05 | The Dow Chemical Company | Metallic-carbide group VIII metal powder and preparation methods thereof |
| CN109396456B (en) * | 2018-12-28 | 2024-02-13 | 西安赛隆金属材料有限责任公司 | Preparation device and method of spherical tungsten powder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE312007B (en) * | 1967-02-23 | 1969-06-30 | Nordstjernan Rederi Ab |
-
1970
- 1970-12-04 US US00095104A patent/US3713789A/en not_active Expired - Lifetime
-
1971
- 1971-03-29 ZA ZA712016A patent/ZA712016B/en unknown
- 1971-03-30 JP JP46019183A patent/JPS5218209B1/ja active Pending
- 1971-04-01 DE DE19712115999 patent/DE2115999B2/en active Pending
- 1971-04-02 FR FR7111809A patent/FR2089133A5/fr not_active Expired
- 1971-04-19 GB GB2585171*A patent/GB1321947A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2115999B2 (en) | 1973-05-10 |
| FR2089133A5 (en) | 1972-01-07 |
| ZA712016B (en) | 1971-12-29 |
| JPS5218209B1 (en) | 1977-05-20 |
| US3713789A (en) | 1973-01-30 |
| DE2115999A1 (en) | 1971-10-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |