FIELD: rolled tube production processes and equipment, namely manufacture of seamless hot deformed tubes in tube rolling aggregates with pilger mills.
SUBSTANCE: method comprises steps of heating ingots and billets till yielding temperature; piercing them to sleeves in screw rolling mills; rolling sleeves to tubes in pilger mills between rolls with periodic profile and with cross outlet angle 20-25° at tilting sleeve-tubes. In pilger mills tubes are rolled at tilting them by 70±2° or 110±2°.
EFFECT: enhanced quality of tubes due to lowered wall thickness difference, improved efficiency of pilger mills, reduced cost of ingot- tube conversion process.
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