GB378484A - Improvements relating to sintered hard metallic alloys and methods for the manufacture thereof - Google Patents
Improvements relating to sintered hard metallic alloys and methods for the manufacture thereofInfo
- Publication number
- GB378484A GB378484A GB13139/31A GB1313931A GB378484A GB 378484 A GB378484 A GB 378484A GB 13139/31 A GB13139/31 A GB 13139/31A GB 1313931 A GB1313931 A GB 1313931A GB 378484 A GB378484 A GB 378484A
- Authority
- GB
- United Kingdom
- Prior art keywords
- carbide
- boron
- carbon
- carbides
- hydrogen
- 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)
- Ceramic Products (AREA)
Abstract
A sintered hard alloy for tools and implements consists of 75 per cent or more of boron carbide with one or more than one carbide of melting point exceeding 2000 DEG C., for example carbide of silicon, vanadium, tungsten molybdenum, titanium, hafnium or zirconium, and a metal or metals of lower melting point, particularly iron, nickel, cobalt or chromium. Boron, obtained for example by the reduction of boron trioxide with magnesium and subsequent treatment with hydrochloric acid may first be carburized to correspond with the formula B6C by carbon or hydrocarbon in a carbon tube furnace traversed by hydrogen. The carbide is intimately mixed with the auxiliary metal and high melting point carbide and the mixture is deprived of gases by heating in vacuum before pressing and finally sintering in a carbon furnace traversed by hydrogen. The metallic elements (including silicon) of the auxiliary carbides, or elementary boron, may be added instead of the carbides to the boron carbide, the elements becoming carburized during the process of sintering.ALSO:A sintered hard alloy for tools and implements consists of 75 per cent or more of boron carbide with one or more than one carbide of melting-point exceeding 2000 DEG C., for example carbide of silicon, vanadium, tungsten, molybdenum, titanium, hafnium, or zirconium, and a metal or metals of lower melting-point, particularly iron, nickel, cobalt, or chromium. Boron, obtained for example by the reduction of boron trioxide with magnesium and subsequent treatment with hydrochloric acid may first be carburized to correspond with the formula B6C by carbon or hydrocarbon in a carbon tube furnace traversed by hydrogen. The carbide is intimately mixed with the auxiliary metal and high melting-point carbide and the mixture is deprived of gases by heating in vacuum before pressing and finally sintering in a carbon furnace traversed by hydrogen. The metallic elements (including silicon) of the auxiliary carbides, or elementary boron, may be added instead of the carbides to the boron carbide, the elements becoming carburized during the process of sintering.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE378484X | 1930-07-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB378484A true GB378484A (en) | 1932-08-04 |
Family
ID=6344558
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB13139/31A Expired GB378484A (en) | 1930-07-31 | 1931-05-04 | Improvements relating to sintered hard metallic alloys and methods for the manufacture thereof |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB378484A (en) |
-
1931
- 1931-05-04 GB GB13139/31A patent/GB378484A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB378484A (en) | Improvements relating to sintered hard metallic alloys and methods for the manufacture thereof | |
GB740547A (en) | Process for the production of carbides | |
US2289104A (en) | Method for the production of hardmetal alloys | |
GB1321947A (en) | Process for producing a cemented tungsten carbide composition | |
GB376299A (en) | Method of making hard alloys for cutting tools | |
GB405119A (en) | Improvements in or relating to the manufacture of hard alloys | |
GB383327A (en) | A hard metal and method of producing the same | |
GB379681A (en) | Alloys and methods of making same | |
US1136669A (en) | Process of producing carbon-free ferrochromium. | |
GB361363A (en) | An improved tool alloy | |
GB388090A (en) | Improvements in and relating to metal compositions | |
GB365895A (en) | Improvements in hard alloys | |
GB471966A (en) | Tool elements and hard alloys therefor | |
GB369918A (en) | Improvements in or relating to the treatment of steel alloys | |
GB348641A (en) | Improvements relating to alloys | |
GB279490A (en) | ||
GB363306A (en) | Improved method of increasing the creep limit or strength of metals and alloys | |
US886858A (en) | Process of producing low-carbon ferro-alloys. | |
GB426506A (en) | Improvements in and relating to hard metal alloys | |
GB370566A (en) | Improvements in or relating to hard metal alloys | |
GB613356A (en) | Improvements relating to hard alloys resistant to oxidation at elevated temperatures | |
GB376836A (en) | Improvements relating to hard metallic alloys for implements and tools | |
GB461872A (en) | An improved method for the production of sintered hard metal alloys | |
GB284722A (en) | Improvements in or relating to processes of manufacture of aluminium alloys | |
GB390236A (en) | Improvements in and relating to metal compositions |