Mechanically highly stressed machinery component i.e. suction roll sleeve, producing method for use on paper machine, involves altering material characteristics of sleeve based on increase in resistance against vibratory fissure corrosion

摘要

The method involves providing a suction roll sleeve (2) with a pass-through opening. A set of material characteristics of the roll sleeve is altered with regard to an increase in resistance against vibratory fissure corrosion in a localized area of the roll sleeve corresponding to the opening, where the resistance occurs by introducing a set of internal stresses or through a structural change in the roll sleeve. The stresses are produced mechanically through plastic deformation. A tool e.g. ball, with a diameter which is larger than a diameter of the opening is inserted via the opening. An independent claim is also included for a roll sleeve for a paper machine, comprising a pass-through opening.