FIELD: valve industry.
SUBSTANCE: invention relates to pipe production, in particular, to production of rerolled pipes with size of 290×12 mm on tube-forming installation 8-16ʺ with pilger mills from ingots-billets produced by cyclic electroslag remelting from low-alloy steel 04H14T3R1F-SH with boron content from 1.3 to 1.8 wt%, for production of hexahedral pipes-billets with "turnkey" size 257+2/-3×6+2/-1×4,300+80/-30 mm for compacted storage in NPP holding pools and spent nuclear fuel transportation, and can be used in production of pipes at pipe-rolling plants with pilger mills. Technical result is ensured by fact that ingot is cast by cyclic electroslag remelting method, turning ingot into ingot-billet, drilling central hole with diameter of 100±5.0 mm, heating ingot-billet to ductility temperature; inverting of ingot-billet in helical rolling mill into sleeves on mandrel, rolling of sleeves on pilger mill in pipe-thread, wherein in the helical rolling mill, the sleeves are being pierced on the mandrel with the size of the outer diameter and the drawing μ=1.67, and sleeves on pilger mill are rolled in tubes with crosswise outlet angle on polishing section 23–24° with drawing μ=7.99, diameter reduction Δ=34.1 % and with feeding of sleeves into deformation center at steady-state rolling process m=16.2–18 mm.
EFFECT: exclusion of an ovality and a variance of a rerolled pipe, as well as partial or complete elimination of through flaws.
6 cl
| Title | Year | Author | Number |
|---|---|---|---|
| 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 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 |
| PRODUCTION OF HEXAGONAL PIPE BILLETS FROM LOW-PLASTICITY STEEL WITH BORON CONTENT OF 1,3-3,5% | 2013 |
|
RU2541213C2 |
| METHOD FOR PRODUCING CONVERSION TUBES OF LOW DUCTILE BORON STEEL | 2006 |
|
RU2297893C1 |
| PRODUCTION OF "TURNKEY" 255×5,0+1,5/-1,0×4300+80/-30 mm HEXAGONAL PIPE-BILLETS | 2013 |
|
RU2547760C1 |
| PRODUCTION OF HEXAGONAL PIPE BILLETS FOR COMPACT STORAGE AND TRANSPORTATION OF USED NUCLEAR FUEL WITH BORON CONTENT OF 1,3-3,5% | 2013 |
|
RU2536023C2 |
| 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 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 |
| METHOD OF HEXAGONAL PIPE BLANC PRODUCTION OF TURNKEY SIZE 252,6×5+1,5/-1,0×4300+80/-30 mm FOR COMPACT STORAGE AND TRANSPORTATION OF SPENT NUCLEAR FUEL | 2013 |
|
RU2542054C1 |
