GB501488A - Improved method of making hard metal alloys and articles made therefrom - Google Patents
Improved method of making hard metal alloys and articles made therefromInfo
- Publication number
- GB501488A GB501488A GB13056/38A GB1305638A GB501488A GB 501488 A GB501488 A GB 501488A GB 13056/38 A GB13056/38 A GB 13056/38A GB 1305638 A GB1305638 A GB 1305638A GB 501488 A GB501488 A GB 501488A
- Authority
- GB
- United Kingdom
- Prior art keywords
- carbon
- hard metal
- cobalt
- class
- improved method
- 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)
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Powder Metallurgy (AREA)
Abstract
501,488. Alloys. NAAMLOOZE VENNOOTSCHAP PHILIPS' CLOEILAMPENFABRIEKEN. May 2, 1938, No. 13056. Convention date, May 5, 1937. [Class 82 (i)] A hard metal alloy is made by sintering a powdered mixture of tungsten, carbon, and cobalt in a graphite mould at a pressure of from 200 to 500 kilogrammes per square centimeter at a temperature insufficient to expel the cobalt and for such a time, for instance one hour, that the content of combined carbon is as high as possible whilst no free carbon is present, for which purpose the carbons content of the mixture is previously and exactly adjusted, preferably within about 0À1 per cent. The amount of carbon to be added is determined by microscopic examination of an etched testpiece, free carbon showing as black inclusions, and a lack of carbon producing a brightly coloured or white phase. Specifications 213,524, 288,521, and 289,477, [all in Class 82 (i)], arc referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE501488X | 1937-05-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB501488A true GB501488A (en) | 1939-02-28 |
Family
ID=6545770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13056/38A Expired GB501488A (en) | 1937-05-05 | 1938-05-02 | Improved method of making hard metal alloys and articles made therefrom |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB501488A (en) |
-
1938
- 1938-05-02 GB GB13056/38A patent/GB501488A/en not_active Expired
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