Analysis of Roll Gap Heat Transfers in Hot Steel Strip Rolling through Roll Temperature Sensors and Heat Transfer Models

摘要: This paper presents an analysis of roll bite heat transfers during hot steel strip rolling. Two types temperature sensors (drilled sensor /slot sensor) implemented near surface and transfer models are used to identify in the interfacial flux, Heat Transfer Coefficient HTCroll-bite pilot rolling tests. It is shown that: - slot type much more efficient than drilled capture correctly fast changes but life’s duration shorter. average HTCroll-bite, identified with signals within range 15-26 kW/m2/K: higher reduction is, is. scale thickness at tends decrease from bite. appears not uniform along roll-strip contact, contrast usual assumptions made existing dissipated by friction interface its partitioning through respectively seems over-estimated thermal gap model [1]. Modeling dissipation should be reviewed verified. The above results show interest determine accurately evaluate precisely corresponding fatigue degradation.