FIELD: processes and equipment for working parts of hard-to-form refractory metals such as tungsten, possibly in machine engineering, instrument making, engine manufacture for making articles operating at extreme temperature values and force conditions.
SUBSTANCE: method comprises steps of heating blank and deforming blank in envelope. Blank deformation process is realized by two stages. At first stage blank is deformed by equal-duct angular extrusion for two passes at heating it till temperature 1200 - 1250°C in die set heated up to temperature 450 - 550°C. At second stage blank is subjected to equal-duct angular extrusion at counter-pressure 400 - 600 MPa for 8 - 10 passes while blank is heated up to 900 - 1000°C. Then blank is gradually cooled in medium with temperature 500 - 600°C for complete cooling of it.
EFFECT: enhanced physical and mechanical properties of tungsten blanks due to providing their ultra-fine grain structure.
1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF COMBINED INTENSE PLASTIC DEFORMATION OF WORKPIECES | 2013 |
|
RU2529604C1 |
| METHOD OF OBTAINING LONG RIBS OF ULTRA-FINE-GRAIN TITANIUM-NICKEL ALLOYS WITH SHAPE MEMORY EFFECT | 2017 |
|
RU2685622C1 |
| METHOD FOR PRODUCING BLANK OF Ti49,3Ni50,7 NANOSTRUCTURED ALLOY WITH SHAPE MEMORY EFFECT | 2016 |
|
RU2641207C1 |
| METHOD OF FORMING OF ULTRAFINE STRUCTURE IN NON-FERROUS ALLOYS BASED ON COPPER AND ALUMINIUM (VERSIONS) | 2013 |
|
RU2551041C2 |
| METHOD OF CONSTANT MAGNET RECEIVING FROM ALLOYS ON BASIS OF SYSTEM NEODYMIUM-IRON-BORON OR PRASEODYMIUM- IRON-BORON | 2006 |
|
RU2337975C2 |
| METHOD OF PRODUCTION OF ULTRA-FINE-GRAINED TITANIUM-NICKEL ALLOYS OF MEMORIZED-SHAPE EFFECT | 2004 |
|
RU2266973C1 |
| METHOD OF DEFORMATION PROCESSING OF METAL ROD-LIKE WORKPIECE | 2010 |
|
RU2417857C1 |
| METHOD FOR COMBINED PROCESSING OF TITANIUM FOR BIOMEDICAL APPLICATION | 2023 |
|
RU2823221C1 |
| ULTRA FINE-GRAINED ALUMINIUM ALLOYS FOR ELECTRIC HARDWARE AND METHOD OF THEIR PRODUCTS (VERSIONS) | 2011 |
|
RU2478136C2 |
| METHOD OF PRODUCTION OF ULTRAFINE-GRAINED TITANIUM WORK PIECES | 2014 |
|
RU2583551C2 |
