Residual Life Analysis of Solid-forged and Bimetallic Working Mill Rolls
| Authors: Pokrovsky A.M. | Published: 29.07.2013 |
| Published in issue: #4(637)/2013 | |
| Category: Technology and Process Machines | |
| Keywords: working mill rolls, steel with carbide-intermetallic hardening, heat treatment, four-high mill stand, stress-strain state, contact problem, operational and residual stress, finite element method, residual life, crack-like defects |
Residual Life Analysis of Solid-forged and Bimetallic Working Mill Rolls 73
The article presents the developed calculation methods and created software for the residual life analysis of solid-forged and bimetallic working mill rolls by means of solving the survivability problem in a deterministic setting. The main research value remains that calculations of mill rolls stresses take account of the operational and residual stresses of heat treatment. Computer simulation has shown that bimetallic mill rolls made of steel with carbide-intermetallide hardening surfacing have significantly greater residual life compared to solid-forged mill rolls made of low-alloyed steels. The proposed approaches can be used for the residual life assessment of the other thermally processed components under cyclic loading; for example, for rotors of turbines, railway wagon wheels and etc.