FIELD: technological processes.
SUBSTANCE: invention relates to metallurgical and pipe rolling industries. Electroslag melting bars with size off 485×1600±25 mm are cast and turned into cakes with size of 470×1600±25 mm. A through hole is drilled with a diameter of 100±5 mm. Cakes are heated to temperature of 1120-1140°C and pierced in a cross-rolling mill into blooms with size of 480×vn.315×2500 mm. Cakes are rolled into pig hot-deformed stock pipes with size of 337×28×8000 mm in a gauge 340 mm on burnishers 282/286 mm with drawing of µn=3.79, clamping by diameter Δ=29.8% and feed of blooms into a deformation site m=16-18 mm. Stock pipes are straightened using temperature of rolling heating and cut into two stock pipes with size of 337×28×4000 mm. Stock pipes are turned and ground. Rolling of stock pipes on cold pilgering mills 450 and 250 is carried out along the routes: 325×12×4000---273×8×6680---219×4×16100 mm. Pipes are cut and rolled on the cold pilgering mill 250 into stock pipes with size of 194×2.5×14100 mm. At one of ends of stock pipes they drill a hole for a pivot of a pulling chain. Stock pipes are profiled into hexahedral pipes with a flat-to-flat dimension of 175±0.4×2.5+0.3/-0.2×14100 mm.
EFFECT: reduced discharge coefficient of metal.
| Title | Year | Author | Number |
|---|---|---|---|
| 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 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 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 |
| 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 |
| 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 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 |
| PRODUCTION OF SEAMLESS COLD-FORMED OIL-WELL TUBING SIZED TO 88,9×6,45×9000-10700 mm FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ-Ш" GRADE | 2012 |
|
RU2527578C2 |
| PRODUCTION OF SEAMLESS COLD-FORMED OIL-WELL TUBING SIZED TO 114,3×6, 8×9000-10700 mm FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ-Ш" GRADE | 2012 |
|
RU2523398C1 |
| MANUFACTURING METHOD OF COLD-ROLLED MARKETABLE TUBES WITH DIMENSIONS OF 150×2×1200 mm WITH INCREASED ACCURACY AS TO DIAMETER AND WALL FROM STEEL GRADE "12Х12М1БФРУ-Ш" FOR FAST NEUTRON REACTORS OF NEW GENERATION | 2013 |
|
RU2542147C1 |
| 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 |
