FIELD: metallurgy.
SUBSTANCE: method involves casting of hollow ingots by electroslag remelting with dimensions of 490×in290×3000±25 mm, their turning and boring to hollow cakes with dimensions of 480×in300×3000±25 mm, heating to the temperature of 1130-1150°C and rolling on pilger mills using backing carbon rings to semi-finished hot-deformed tube workpieces with dimensions of 338×25×11800±100 mm. Rolling of tube workpieces is performed in a 340 mm pass on mandrels with a diameter of 282/286 mm with drawing µ=4.35, by swaging as to diameter Δ=29.2% and supply of hollow cakes to the deformation zone m=16-18 mm. After removal of process wastes tube workpieces are straightened in a six-roll straightening machine, cut into two tube workpieces with dimensions of 338×25×5900±25 mm, turned and bored to tube workpieces with dimensions of 325×12×5900±25 mm. Tubes are rerolled on KHPT tube cold-rolling mills on routes 325×12×5900±25 --- 273×8×10000±40 --- 219×5×19400±80 mm. Tubes with dimensions of 219×5×19400±80 mm are cut into two tube workpieces with dimensions of 219×5×9700±40 mm and rolled on a KHPT 250 mill to tube workpieces with dimensions of 194×3.5×15300±60 mm, which are cut into two tube workpieces with dimensions of 194×3.5×7650±30 mm and rerolled on the KHPT 250 mill to marketable tubes with dimensions of 150×2×16800±70 mm.
EFFECT: improving tube accuracy as to a diameter and a wall.
1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| DIMENSIONS OF 150(1200 MM WITH INCREASED ACCURACY AS TO DIAMETER AND WALL FROM STEEL GRADE "12-12¦1L+¦L-+ (¦¦ 450L-+)" FOR FAST NEUTRON REACTORS OF NEW GENERATION | 2013 |
|
RU2542142C1 |
| MANUFACTURING METHOD OF COLD-ROLLED MERCHANTABLE TUBES WITH SIZE OF 170×370 mm FROM STEEL GRADE "16Х12МВСФБР-Ш (ЭП823-Ш)" FOR FAST NEUTRON REACTORS OF NEW GENERATION | 2013 |
|
RU2545944C2 |
| MANUFACTURING METHOD OF SEMI-FINISHED HOT-ROLLED MECHANICALLY PROCESSED PIPES WITH SIZE OF 325×12 mm WITH INCREASED ACCURACY AS TO DIAMETER AND WALL FROM STEEL GRADES "12Х12М1БФРУ-Ш", "16Х12МВСФБР-Ш" FOR REROLLING ON "ХПТ" 450 AND "ХПТ" 250 MILLS INTO SEMI-FINISHED PIPE WORKPIECES WITH SIZE OF 202±1,2×3,5+0,3/-0,2 mm AND FURTHER SHAPING INTO HEXAGONAL PIPE WORKPIECES WITH FLAT-TO-FLAT SIZE OF 181,8±0,4×3,5+0,3/-0,2×3750+20/-0 mm AND 175±0,4×2,5+0,3/-0,2×2680+20/-0 mm FOR FAST NEUTRON REACTORS OF NEW GENERATION | 2013 |
|
RU2550041C2 |
| MANUFACTURING METHOD OF HEXAGONAL PIPE WORKPIECES WITH FLAT-TO-FLAT DIMENSION OF 181,8±0,4×3,5+0,3/-0,2×3750+20/-0 mm FROM STEEL GRADE "12Х12М1БФРУ-Ш" FOR FAST NEUTRON NPP REACTORS | 2013 |
|
RU2545949C2 |
| MANUFACTURING METHOD OF SEMI-FINISHED HOT-ROLLED MECHANICALLY PROCESSED PIPES WITH SIZE OF 325×12 mm WITH INCREASED ACCURACY AS TO DIAMETER AND WALL FROM STEEL GRADES "12Х12М1БФРУ-Ш" AND "16Х12МВСФБР-Ш" FOR REROLLING ON "ХПТ" 450 AND "ХПТ" 250 MILLS INTO SEMI-FINISHED PIPE WORKPIECES WITH SIZE OF 202±1,2×3,5+0,3/-0,2 mm, 194±1,2×2,5+0,3/-0,2 mm AND FURTHER SHAPING INTO HEXAGONAL PIPE WORKPIECES WITH FLAT-TO-FLAT SIZE OF 181,8±0,4×3,5+0,3/-0,2×3750+20/-0 mm AND 175±0,4×2,5+0,3/-0,2×2680+20/-0 mm FOR FAST NEUTRON REACTORS OF NEW GENERATION | 2013 |
|
RU2550045C2 |
| METHOD TO PRODUCE HEXAHEDRAL STOCK PIPES WITH FLAT-TO-FLAT DIMENSION 175×2,5+0,3/-0,2×2680+20/-0 mm FROM STEEL OF GRADE "16Х12МВСФБР-Ш (ЭП823-Ш)" FOR FAST FEEDER REACTORS | 2013 |
|
RU2547362C2 |
| PRODUCTION OF HEXAGON PIPE BILLETS OF "TURN KEY" 181,8×3,5+0,3/-0,2×3750+20/-0 mm OF "12Х12М1БФРУ-Ш (ЭП450У-Ш)"-GRADE STEEL | 2013 |
|
RU2547053C1 |
| MANUFACTURING METHOD OF HEXAGONAL STOCK TUBES WITH FLAT-TO-FLAT DIMENSION OF 175±0.4×2.5+0.3/-0.2×2680+20/-0 mm FROM STEEL GRADE "16Х12МВСФБР-Ш" FOR FAST NEUTRON NPP REACTORS | 2013 |
|
RU2542144C1 |
| MANUFACTURING METHOD OF COLD-ROLLED MARKETABLE PIPES WITH SIZE OF 170±1,5×3±0,25×370 mm WITH INCREASED ACCURACY AS TO WALL FROM STEEL GRADE "16Х12МВСФБР-Ш" FOR FAST NEUTRON REACTORS OF NEW GENERATION | 2013 |
|
RU2545970C2 |
| PRODUCTION OF LONG-SIZED 265×22×13000±300 AND 285×25×11750±50 mm-TUBE STOCK FROM HOLLOW ESR INGOTS-BILLETS OF "08Х10Н20Т2" AND "08Х10Н16Т2" GRATE STEEL FOR SUBMARINE PERISCOPE DRIVES | 2012 |
|
RU2527591C2 |
