Rolls of a sill for oven heating and oven heating furnace prolonged vertical heat treatment furnace and vertical heat treatment including rolls of the sill

摘要

Invention patent: "rolls of a sill for oven heating and oven heating furnace prolonged vertical heat treatment furnace and vertical heat treatment including rolls of sunThe threshing floor ".Vertical heat treatment furnace for passage of a metal strip, through him,For heat treatment, and a roll of the threshold applied to an oven heating / prolonged heating furnace, vertical heat treatment are disclosed.The roll of the threshold can be configured so that the angle of necking in of each of the first sections of continuous necking to a flat section in a central portion of the bottom rollerAn axial direction of the roll is greater than the angle of necking in of each of the second sections of necking in continuous with each of the first sections of necking of axial direction of the roll.The length LC (mm) of the flat section and the length L1 (mm) of the first section of necking can satisfy the following relationships: 0.5 wmin 243 LC 243 wmin and wmin 243 LC + 2 x 1 243 Wmax - 400, where wmin is the minimum width (mm) of the metal strip and Wmax is the maximum width (mm) of the metal strip.