Method of manufacturing seamless cold-resistant and corrosion-resistant pipe size 377 × 426 × 9-16 and 9-18 mm from a continuously-cast billets DIAMETER 550 mm on pipe-rolling installation with pilger

摘要

1. A process for the production of seamless cold-resistant and corrosion-resistant pipe sizes 377 and 426 × 9-16 × 9-18 mm from a continuously cast billets (NLZ) of diameter 550 mm of tube installations pilger comprising ingot casting cone profitably size 540 / 555 × 1650, 570/585 × 1700, continuously cast billets measuring 530 × 1630, the production of forged preforms size of 540 × 1630, 600 × 1630 mm, drilling bullion NLZ and forged blanks of the central opening diameter (100 ± 5) mm , heating them to a temperature ductility, firmware in mills helical pro Rollers ingot size 540/555 × 100 × 1650 mm in size the liner vn.390 × 560 × 2 870 mm diameter ingots rise in length from 0.9 to 3.7%, ingot size 570/585 × 100 × 1700 mm in sleeve vn.440 size of 620 × 2800 mm × the diameter of the lift along the length of the ingots from 5.98 to 8.80%, continuously cast billets measuring 530 × 100 × 1630 mm in size the liner 550 × 2850 mm × vn.390 elevation of diameter 3.77%, blanks measuring 540 × 100 × 1850 mm in size the liner vn.390 × 570 × 2920 mm in diameter with the rise of 5.56% and billets of 600 × 100 × 1630 mm in size the liner 620 × vn.440 × 2900 mm with the rise of outside diameter 3.33%, the rolling pipe-lashes n and pilger mills in groove, respectively 383 and 434 mm with a tilting liner-pipe at an angle of (90 ± 10) °, porezku to length, the removal process waste - bare ends and pilger heads saw cutting hot, heating gas roller furnace to a temperature of 800 -860 ° C, in the calibration pipe sizing mill with a total rolling reduction of the diameter to 1.0%, on kosovalkovoy straightening leveler, solenoid control, pre-labeled tubes, the primary control surface quality, crop ends, the provisional acceptance, ult