FIELD: tube production, namely production of tubes of low ductile steel with given boron content in tube rolling plants with pilger mills for further conversion of such tubes to hexahedral tubes for compacted storage of waste nuclear fuel.
SUBSTANCE: method for producing tubes of steel with boron content 1.3 -1.8% comprises steps of casting by means of electroslag refining hollow ingots with size 480 -490 x 270 in. x 2300 -2500 mm; boring them and turning for removing air holes and flux traces and producing hollow blanks with size 470 - 480 x 280 in. x 2300 - 2500 mm with surface roughness Rz ≤ 40 micrometers; forming on ends of hollow blanks (corresponding to bottom ends) at outer side - blunted cone along length L = (1.5 - 2)Sbl with blunting value h = (5.0 - 6.0) St, where Sbl - wall thickness of hollow blanks of electroslag refining, mm; St - wall thickness of conversion tubes, mm; h - blunting value of wall of hollow blanks of electroslag refining, mm. Blanks are heated till plasticity temperature 1040 -1060°C, rolled on mandrels with diameter 264/265 mm in pilger mill to conversion tube-bundles with size 290 x 12 x 22000 - 23000 mm at elongation factor μ = 10.7 - 11.4. Technological wastes such as pilger heads and others are cut-off by means of hot cutting saw. Tube-bundles are divided by two tubes of the same length or length multiple to that of conversion blank and then they are subjected to warm straightening in six-roll straightening machine at using heating temperature of rolling process. Invention allows reduce temperature of heating hollow blanks by 20 - 30°C.
EFFECT: elimination of operation for piercing ingots in skew rolling mills, shortened time period for heating hollow blanks, lowered metal consumption, reduced cost of commercial hexahedral tube-blanks.
3 cl, 1 dwg, 1 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF CONVERSION PIPE MANUFACTURING IN PIPE ROLLING PLANTS WITH PILGER MILLS OF LOW-ELASTICITY STEEL WITH BORON CONTENT OF 1,3-1,8% | 2006 |
|
RU2334571C2 |
| METHOD FOR PRODUCING INGOT-BLANKS BY ELECTROSLAG REFINING OF LOW-DUCTILE STEEL CONTAINING BORON AND FOR ROLLING TUBES OF SUCH BLANKS IN TUBE ROLLING PLANTS WITH PILGER MILLS FOR FURTHER CONVERSION OF TUBES TO HEXAHEDRAL TUBE-BLANKS FOR COMPACTED STORAGE OF WASTE NUCLEAR FUEL | 2006 |
|
RU2317865C2 |
| PRODUCTION OF HEXAGONAL PIPE BILLETS FOR COMPACT STORAGE AND TRANSPORTATION OF USED NUCLEAR FUEL WITH BORON CONTENT OF 1,3-3,5% | 2013 |
|
RU2536023C2 |
| PRODUCTION OF HEXAGONAL PIPE BILLETS FOR COMPACT STORAGE AND TRANSPORTATION OF USED NUCLEAR FUEL FROM LOW-DUCTILE STEEL WITH BORON CONTENT OF 1,3-3,5% | 2013 |
|
RU2541212C2 |
| PRODUCTION OF HEXAGONAL PIPE BILLETS FROM LOW-PLASTICITY STEEL WITH BORON CONTENT OF 1,3-3,5% | 2013 |
|
RU2541213C2 |
| METHOD OF PRODUCING OF TUBE STOCK SIZED TO 290X12 MM TO SPECS 8-16 | 2012 |
|
RU2511199C1 |
| PRODUCTION OF REROLLED 290×12 mm PIPES AT PRU 8-16" WITH PILGER MILLS FROM ESR INGOTS-BILLETS OF LOW-DUCTILITY "04Х14Т3Р1Ф-Ш"- AND "04Х14Т5Р2Ф-Ш"-GRADE STEELS WITH BORON CONTENT OF 1,3-3,5% FOR FABRICATION OF HEXAGONAL TURNKEY PIPE BILLETS SIZED TO 257+2,0/-3,0×6,0+2,0/-1,0×4300+80/-30 mm FOR RACKS OF NUCLEAR POWER STATION USED FUEL COOLING POND | 2013 |
|
RU2550032C2 |
| PRODUCTION OF SEAMLESS REROLLED PIPES SIZED TO 289×11,5×26000-27000 AND 290×12×26000-27500 mm AT PRU 8-16" WITH PILGER MILLS FROM ESR INGOTS-BILLETS OF LOW-DUCTILITY "04Х14Т3Р1Ф-Ш" AND "04Х14Т5Р2Ф-Ш"-GRADE STEELS WITH BORON CONTENT OF 1,3-3,5% FOR PRODUCTION OF HEXAGONAL PIPES-BILLETS SIZED TO TURNKEY BASIS OF 257+2,0/-3,0×6,0+2,0/-1,0×4300+80/-30 mm FOR COMPACT STORAGE IN NUCLEAR POWER STATION COOLING POND AND TRANSPORTATION OF USED NUCLEAR FUEL | 2012 |
|
RU2530085C2 |
| PRODUCTION OF REROLLED 292×12 mm PIPES AT PRU 8-16" WITH PILGER MILLS FROM ESR INGOTS-BILLETS OF LOW-DUCTILITY "04Х14ТЗР1Ф-Ш"- AND "04Х14Т5Р2Ф-Ш"-GRADE STEELS WITH BORON CONTENT OF 1,3-3,5% FOR FABRICATION OF HEXAGONAL TURNKEY PIPE BILLETS SIZED TO 257+2,0/-3,0×6+2,0/-1,0×4300+80/-30 mm FOR STORAGE AT RACKS OF NUCLEAR POWER STATION USED FUEL COOLING POND AND ITS TRANSPORTATION | 2013 |
|
RU2550033C2 |
| METHOD FOR PRODUCING HEXAGONAL PIPE WORKPIECES WITH FLAT-TO-FLAT DIMENSION OF 257+2/-3×6+2/-1×4300+80/-30 mm FROM STEEL WITH BORON CONTAINS FROM 1,3 TO 3,0 % FOR TRANSPORT AND COMPACT STORAGE ON RACKS OF FUEL ASSAMBLIES NEW MODIFICATIONS WITH HIGH ENRICHMENT AND HIGH URANIUM CONSUMPTION | 2015 |
|
RU2618286C2 |
