FIELD: metallurgy.
SUBSTANCE: three-layered hollow centrifugal cast billets are cast from difficult-to-deform steel grades and alloys, which are cladded with ductile steels of carbon grades, with the size of 400-650×3200±100 mm with the ratio of thicknesses of ductile layers, which is restricted by mathematical relationship, their heating is performed to the temperature that is higher by 10-20°C than ductility temperature interval of difficult-to-form steel grades and alloys and rolling on the pilger mill with swaging as to the diameter, the value of which is decreased from 180 to 100 mm with increase of pipe diameter. Seeding on the pipe length equal to length of recoil of a supply unit is performed with supply of the billet to the deformation zone, which is equal to (0.5-0.7) of supply value munit at the steady-state rolling process, and rolling of the pilger head with supply equal to (1.1-1.25) munit.
EFFECT: reduction of consumption of expensive metal; increase of efficiency of a pipe rolling unit with pilger mills; reduction of pipe cost.
| Title | Year | Author | Number |
|---|---|---|---|
| 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 |
|
RU2535151C2 |
| 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 |
| METHOD FOR PRODUCTION OF BAR-INGOTS BY ELECTROSLAG REMELT FROM ALLOYED AND LOW-ALLOYED STEEL GRADES, ROLLING OF COMMERCIAL AND CONVERSION PIPES OF LARGE AND MEDIUM DIAMETERS ON TUBE-ROLLING PLANTS WITH PILGER ROLLING MILL | 2006 |
|
RU2346765C2 |
| 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 |
| METHOD OF PRODUCTION OF SEAMLESS HOT-ROLLED LARGE- AND MEDIUM-DIAMETER PIPES FROM STEEL AND ALLOYS AT PIPE ROLLING PLANTS WITH PILGRIM MILLS FROM TUBULAR BLANKS | 2012 |
|
RU2502570C1 |
| PRODUCTION OF REROLLED LONG-SIZED PIPES FROM IRON-NICKEL- AND NICKEL-BASED ALLOYS AT PRU WITH PILGER MILLS | 2012 |
|
RU2523399C1 |
| METHOD FOR PRODUCING BY ELECTROLAG REFINING INGOT-BLANKS OF HARD-TO-FORM STEELS AND ALLOYS AND FOR ROLLING OF THEM COMMERCIAL TUBES OF LARGE AND MEAN DIAMETERS IN TUBE ROLLING PLANTS WITH PILGER MILLS AND CONVERSION TUBES FOR FURTHER REROLLING IN TUBE COLD ROLLING MILLS | 2006 |
|
RU2322317C2 |
| 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 |
| PRU WITH PILGER MILLS FOR ROLLING OF SEAMLESS HOT-ROLLED 273-630 mm-DIA PIPES | 2013 |
|
RU2533614C1 |
| METHOD FOR PRODUCING HOT ROLLED COMMERCIAL AND CONVERSION TUBES OF LARGE AND MEAN DIAMETERS OF CORROSION RESISTANT HARD-TO-FORM KINDS OF STEELS AND ALLOYS IN TUBE ROLLING PLANTS WITH PILGER MILLS | 2006 |
|
RU2315673C2 |
