GB637165A - Improvements in the manufacture of hard sintered alloys - Google Patents
Improvements in the manufacture of hard sintered alloysInfo
- Publication number
- GB637165A GB637165A GB21610/46A GB2161046A GB637165A GB 637165 A GB637165 A GB 637165A GB 21610/46 A GB21610/46 A GB 21610/46A GB 2161046 A GB2161046 A GB 2161046A GB 637165 A GB637165 A GB 637165A
- Authority
- GB
- United Kingdom
- Prior art keywords
- carbide
- alloy
- zirconium
- tungsten
- cooling
- 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
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
A double carbide of Zr and W, represented by the formula Zr3WC4, is obtained by mixing fine powders of reducible compounds of Zr and W, e.g. ZrO2 and WO3, in stoichiometrical proportions with the quantity of carbon required for the reduction of the said compounds and carburisation of the Zr and W, reducing and carburising the mixture at a temperature of at least 2000 DEG C. while extracting the gases liberated by the reaction, and then cooling the product, the cooling from 1600 DEG to 1000 DEG C. being slow and controlled.ALSO:In a process for the manufacture of hard sintered alloys consisting of zirconium carbide and tungsten carbide agglomerated by means of a more fusible metal or alloy, e.g. cobalt or iron and cobalt, the zirconium carbide is introduced into the alloy in the form of a double carbide of zirconium and tungsten represented by the formula [ZrWC1] or in the form of a solid solution of the said double carbide and the double carbide of titanium and tungsten represented by the formula Ti3WC4. The alloy may also contain one or more other refractory carbides such as those of vanadium, tantalum, niobium, and molybdenum. The vanadium, or vanadium and chromium is, or are, incorporated in the alloy by the process described in Specification 637,166. The double carbide or the solid solution is mixed as a fine powder with the other constituents of the final alloy, compressed, and sintered. The solid solution of the double carbides may be obtained by mixing reducible compounds of the said three refractory metals in such proportions that for each atom of tungsten in the solid solution there are three atoms of zirconium and titanium together, and also incorporating in the mixture the quantity of carbon required for the reduction of the said compounds of, and carburization of, the tungsten, zirconium and titanium, reducing and carburizing the mixture at a temperature between 2000 DEG C. and 2300 DEG C. while extracting the gases liberated by the reaction, and then cooling the product, the cooling from 1600 DEG C. to 1000 DEG C being slow and controlled. Specification 516,227 also is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR637165X | 1941-07-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB637165A true GB637165A (en) | 1950-05-17 |
Family
ID=8995104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21610/46A Expired GB637165A (en) | 1941-07-04 | 1946-07-19 | Improvements in the manufacture of hard sintered alloys |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB637165A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1981002588A1 (en) * | 1980-03-04 | 1981-09-17 | Metallurg Inc | Sintered hardmetals |
| CN113909480A (en) * | 2020-07-08 | 2022-01-11 | 核工业西南物理研究院 | Preparation method of in-situ nano zirconium oxide particle dispersion reinforced tungsten alloy |
-
1946
- 1946-07-19 GB GB21610/46A patent/GB637165A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1981002588A1 (en) * | 1980-03-04 | 1981-09-17 | Metallurg Inc | Sintered hardmetals |
| US4451292A (en) * | 1980-03-04 | 1984-05-29 | Hall Fred W | Sintered hardmetals |
| CN113909480A (en) * | 2020-07-08 | 2022-01-11 | 核工业西南物理研究院 | Preparation method of in-situ nano zirconium oxide particle dispersion reinforced tungsten alloy |
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