Hot dip metal plating bath roll and method of production of hot dip metal plating bath roll

Abstract

A hot dip metal plating bath roll preventing flaws in a steel sheet due to a bath roll, realizing stable running at a high speed, and improving the productivity of a plated steel sheet, which hot dip metal plating bath roll having vertical grooves each formed on an outer circumferential surface of the roll and including two first curved parts projecting to the outside of the roll and at least one second curved part arranged between the two first curved part and projecting to the inside of the roll and horizontal grooves each formed on an outer circumferential surface of the roll along a barrel length direction of the roll, a pitch P(mm) and depth d(mm) of the vertical grooves satisfying 1.0≤P≤10, 0.2≤d≤5, and d≤P/2, a depth d(mm) being 60% to 150% of the depth dof the vertical grooves, and a width w(mm) of the horizontal grooves being 2 times or more of the depth dor 2 times or more of a radius of curvature (mm) of curved surfaces forming bottom parts of the horizontal grooves and 0.7 times or less of a pitch P(mm), the pitch P(mm) of the horizontal grooves being 1.0≤P≤10.