GB1419278A - Process for preparing cemented tungsten carbide - Google Patents
Process for preparing cemented tungsten carbideInfo
- Publication number
- GB1419278A GB1419278A GB1325073A GB1325073A GB1419278A GB 1419278 A GB1419278 A GB 1419278A GB 1325073 A GB1325073 A GB 1325073A GB 1325073 A GB1325073 A GB 1325073A GB 1419278 A GB1419278 A GB 1419278A
- Authority
- GB
- United Kingdom
- Prior art keywords
- graphite
- mixture
- sintered
- powder
- tungsten carbide
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
- C22C1/053—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor with in situ formation of hard compounds
- C22C1/055—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor with in situ formation of hard compounds using carbon
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
1419278 Sintered cemented carbides UNION CARBIDE CORP 20 March 1973 [21 March 1972] 13250/73 Heading C7D Sintered cemented tungsten carbide is made by ball milling a powder mixture of W, sufficient graphite to form WC 3-20 wt per cent Co for a time no longer than that needed to produce a cold pressed green compact of maximum density. The ball milled mixture is then cold pressed and sintered e.g. at 1350-1550‹C. The W powder is preferably 2-2¢ micron, the Co powder 1-1¢ micron and the graphite - 200 mesh. Up to 10 wt per cent of one of TaC, TiC, Cr 3 C 2 , VC and NbC or up to 20% total of more than one may be added to the mixture before ball milling. The amount of graphite included in the mixture is Œ 0.1% of the stoichiometric amount for forming WC with the W. The required milling time varies 58-128 hours and the compacts are sintered in a packing of 25% graphite and 75% Al 2 O 3 .
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US23660872A | 1972-03-21 | 1972-03-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1419278A true GB1419278A (en) | 1975-12-31 |
Family
ID=22890202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1325073A Expired GB1419278A (en) | 1972-03-21 | 1973-03-20 | Process for preparing cemented tungsten carbide |
Country Status (3)
| Country | Link |
|---|---|
| AT (1) | AT331048B (en) |
| CA (1) | CA985306A (en) |
| GB (1) | GB1419278A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2116584A (en) * | 1982-03-11 | 1983-09-28 | Metallurg Inc | Sintered hardmetals |
| GB2206357A (en) * | 1987-06-30 | 1989-01-05 | Carpenter Technology Corp | A method of manufacturing flat forms from metal powder and product formed therefrom |
| CN105312582A (en) * | 2015-10-10 | 2016-02-10 | 自贡金成硬质合金有限公司 | Integral one-time forming process for hard-alloy orthopaedic scalpel blank |
-
1973
- 1973-03-14 CA CA166,935A patent/CA985306A/en not_active Expired
- 1973-03-20 AT AT247673A patent/AT331048B/en not_active IP Right Cessation
- 1973-03-20 GB GB1325073A patent/GB1419278A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2116584A (en) * | 1982-03-11 | 1983-09-28 | Metallurg Inc | Sintered hardmetals |
| GB2206357A (en) * | 1987-06-30 | 1989-01-05 | Carpenter Technology Corp | A method of manufacturing flat forms from metal powder and product formed therefrom |
| GB2206357B (en) * | 1987-06-30 | 1991-03-27 | Carpenter Technology Corp | A method of manufacturing flat forms from metal powder and product formed therefrom |
| CN105312582A (en) * | 2015-10-10 | 2016-02-10 | 自贡金成硬质合金有限公司 | Integral one-time forming process for hard-alloy orthopaedic scalpel blank |
Also Published As
| Publication number | Publication date |
|---|---|
| ATA247673A (en) | 1975-10-15 |
| AT331048B (en) | 1976-07-26 |
| CA985306A (en) | 1976-03-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |