HEARTH ROLL FOR CONTINUOUS ANNEALING FURNACE AND MANUFACTURING METHOD OF HEARTH ROLL FOR CONTINUOUS ANNEALING FURNACE

摘要

PROBLEM TO BE SOLVED: To provide a hearth roll for a continuous annealing furnace capable of providing stable transportation by preventing meandering and a buckling phenomenon of a metallic strip due to a thermal expansion profile of the hearth roll in the continuous annealing furnace and making service life longer, and a manufacturing method of the hearth roll for the continuous annealing furnace.;SOLUTION: A hearth roll for a continuous annealing furnace comprises: a cylindrical outer layer sleeve 2 made of heat resistant steel; and a cylindrical inner layer sleeve 3 which is made of a metal having higher thermal conductivity than that of the outer layer sleeve 2 and of which the outer peripheral surface is joined to an inner peripheral surface of the outer layer sleeve 2. A barrel length in an inner diameter side of the inner layer sleeve 3 is shorter than that in an outer diameter side, and thus, an end face in an axial direction of the inner layer sleeve is inclined.;SELECTED DRAWING: Figure 3;COPYRIGHT: (C)2018,JPO&INPIT