FIELD: metallurgy.
SUBSTANCE: proposed method comprises casting of hollow ESR ingots from "10ГН2МФА"-grade steel to size of 535×vn.250×3100+100 mm. Said ingots are subjected to anodic-mechanical cutting to get equal-length shell ring blanks. Said shell ring blanks are turned to diameter 520±1.0 mm. They are taper-bored in ID, taper small diameter making 257±1.0 mm while its larger diameter makes 265±1.0 mm. Said shell rings are sealed by steel "08Х18Н10Т". Bimetal ingot bottom part are removed to drill the 520±1.0×gr.265±1.0×1550±50 mm through central 100±1.0 mm diameter bore. After boring to 520±1.0×gr.265±1.0×160±1.0×1550±50 mm, bimetal ingots are heated to ductility temperature at pierced at helical rolling mill to sleeves sized to 540×вн.305×1640-1770 mm at 290 mm diameter mandrels. Said sleeves are rolled at Pilger mill in passes 383 mm of 271/272 mm mandrels with carbonaceous jar rings to rerolled pipes sized to 371×50.5×4600-4900 and 446×54×4700-5100 mm. Said rerolled pies are heat treated, straightened, bores and turned to commercial hot-rolled 279×36×4000-4300 mm pipes with plating layer depth of 7±2 mm.
EFFECT: decreased consumption of steels, decreased rejects over plating layer depth.
2 cl, 3 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD TO PRODUCE HOT-ROLLED MECHANICALLY TREATED BIMETAL PIPES WITH SIZE VN279X36 (351X36) AND VN346X40 (426X40) MM FROM STEEL OF GRADES 10GN2MFA+08X18N10T WITH INTERNAL PLATING LAYER OF STEEL 08H18N10T WITH THICKNESS OF 7±2 MM | 2012 |
|
RU2516137C1 |
| BIMETAL BLANK FROM ("10ГН2МФА+08Х18Н10Т") GRADE STEELS AND ITS FABRICATION FOR PRODUCTION OF COLD-ROLLED BIMETAL OUT 279×36- AND OUT 346×40 mm SIZE PIPES WITH INNER CLAD 7±2 mm DEEP PLY FROM "08Х18Н10Т" GRADE STEEL FOR NUCLEAR POWER STRUCTURES | 2013 |
|
RU2554249C2 |
| PRODUCTION OF BIMETAL 351×36 mm PIPES FOR NUCLEAR POWER STATIONS FROM "10ГН2МФА"-GRADE STEEL WITH INTERNAL CLAD PLY OF "08X18H10T" STEEL | 2013 |
|
RU2545933C2 |
| PRODUCTION OF "вн.279×36 (351×36)" AND "вн. 346×40" (426×40) mm PIPES FOR NUCLEAR POWER STATIONS FROM "10ГН2МФА" AND "08Х18Н10Т" GRADE STEELS WITH 7 mm INNER CLAD PLY | 2013 |
|
RU2542129C2 |
| BIMETAL BLANK OUT OF STEEL GRADES "10+=2¦LL" AND "08-18=10T" TO MANUFACTURE HOT-ROLLED, MACHINED, BIMETAL PIPES WITH SIZE "T=279(36" MM FOR NUCLEAR POWER FACILITIES | 2013 |
|
RU2567420C2 |
| PRODUCTION OF BILLETS WITH OUTER AND INNER PLATING PLIES FROM CORROSION-RESISTANT STEELS AND ALLOYS FOR PRODUCTION OF SEAMLESS THREE-LAYER HOT- AND COLD-ROLLED COMMERCIAL AND REROLLED LONGER-LIFE PIPES FOR GAS AND GAS CONDENSATE EXTRACTION IN HYDROGEN SULPHIDE-BEARING MEDIA, ITS TRANSPORTATION AND GENERAL PURPOSE PIPES | 2013 |
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RU2535151C2 |
| MANUFACTURING METHOD OF THREE-LAYERED HOLLOW CENTRIFUGAL CAST SECTIONS FROM DIFFICULT-TO-FORM STEEL GRADES AND ALLOYS, WHICH ARE CLADDED WITH DUCTILE CARBON STEEL GRADES, AND ROLLING FROM THEM ON PIPE ROLLING UNITS WITH PILGER MILLS OF HOT-ROLLED MECHANICALLY TREATED MERCHANTABLE AND PROCESS PIPES OF LARGE AND MEAN DIAMETERS | 2013 |
|
RU2550040C2 |
| METHOD OF MANUFACTURING OF PIPES "T=279(36" AND "T=346(40" MM OUT OF "08-18=10T-+" GRADE STEEL FOR NUCLEAR POWER FACILITIES | 2013 |
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RU2542139C1 |
| METHOD OF PRODUCTION OF COLD-ROLLED PIPES WITH SIZE VN346(40 MM FROM STEEL OF GRADE "08-18=10T-+" FOR NUCLEAR POWER ENGINEERING FACILITIES | 2013 |
|
RU2547054C2 |
| PRODUCTION OF SEAMLESS COLD-FORMED OIL-WELL TUBING SIZED TO 168,3×10,6×5000-10000 mm | 2013 |
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RU2545950C2 |
