The paper deals with the production of could drawn precision seamless steel tubes with three-drawn and two-drawn single-run technology. The aim of experiment is to verify the possibility of drawing rolled tubes of size ? 70 × 6.3 mm (material E355) with three-draw single-run technology without intermediate recrystallising annealing on the final size ? 44 × 3 mm in the fixed reduction and two-draw single-run technology ? 70 × 6.3 mm without intermediate recrystallising annealing on the final size ? 50 × 3.75 mm in the fixed reduction and with size ? 70 × 6.3 mm without intermediate recrystallising annealing on the final size ?45 × 3.75 mm in the fixed reduction. Advise the impact choice of the reduction on roughness of inner surface of tubes.
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