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Lecture

Thermo-mechanical proprieties of the steel shell formed during continuous casting process

Wednesday (28.09.2016)
17:00 - 17:15
Part of:


As part of excellence cluster project, a simulation platform for integrative development of materials and process chains has been developed. This simulation platform is used for the numerical design of case hardened steel for large transmission gears.

This study focuses on improving the fundamental understanding of hot tearing for peritectic and case hardening steel grades. The mechanical properties were obtained by Mold Cracking Simulator (MCS) trails and hot tensile test, which show a good comparison. The factors like phase evolutions during solidification, precipitation, morphology of dendrites, microsegregation influence the strength.

Solidification and phase evolutions are studied by using multi-component kinetic module of MactCalc and Differential Thermal Analysis (DTA). Multi-phase field modelling using MICRESS® is attempted to simulate the evolution of microstructure and compare it with microstructure of MCS and hot tensile samples. The thermodynamic data and mobility date for the MICRESS simulation is assembled form ThermoCalc. 3D FE model of the continuous casting in ABAQUS with integrative flow curves represents the local strass formation as a function of the time, temperature and deformation degree on the macroscopic scale.

The combination simulations and practical trails provides the requirements for as-cast structure and casting parameters, which make it possible to avoid the hot crack formation on the surface and ensure the stable fine grain structure at the end of the process chain.

Speaker:
Viktor Kripak
RWTH Aachen University
Additional Authors:
  • Dr. Ulrich Prahl
    RWTH Aachen University
  • Prof. Dr. Wolfgang Bleck
    RWTH Aachen University

Dateien

Category Short file description File description File Size
Manuskript Fig. 2: Local strass formation on solidified shell during continuous casting This is a figure to my abstract 62 KB Download
Manuskript Fig. 1: Carbon distribution during solidification of case hardening steel in equiaxed zone This is figure to my abstract 137 KB Download