Abstract
The paper concerns numerical simulations of progressive hardening include phase transformations in solid state of steel. Abaqus FEA software is used for numerical analysis of temperature field and phase transformations. Numerical subroutines, written in fortran programming language are used in computer simulations where models of the distribution of movable heat source, kinetics of phase transformations in solid state as well as thermal and structural strain are implemented. Model for evaluation of fractions of phases and their kinetics is based on continuous heating diagram and continuous cooling diagram. The numerical analysis of thermal fields, phase fractions and strain associated progressive hardening of elements made of steel were done.
Highlights
The anticipation of final properties of the element that undergoes progressive hardening is possible after defining the type of the formed microstructure accompany thermal treatment
Computer simulation of temperature field, phase fractions of progressive hardening process was performed in Abaqus FEA for dimensions 120x25x10 mm thin plate (Fig. 2) made of C60 steel with assumed base material structure consist of ferritic–pearlitic structure (60% ferrite and 40% pearlite)
During the analysis of findings obtained from the simulation of progressive hardening of the steel object, which was heated by means of the movable heat source, one may observe that after the adoption of the heating and cooling method with respect to the hardened flat, the retained martensite, bainite, pearlite and ferrite, occur only in surface layers
Summary
The anticipation of final properties of the element that undergoes progressive hardening is possible after defining the type of the formed microstructure accompany thermal treatment. In order to achieve this aim it is essential to consider such a treatment of thermal phenomena, phase transformations and mechanical phenomena in numerical modeling. There is no comprehensive numerical models which allow provide reliable assessment of phenomena that accompany to such a process of hardening. Progressive hardening is performed for concentrated heat sources with high power. Near to this sources occurs a high temperature and its considerable gradients [1, 2]. Temperature and phase transformations in hardening steel elements are reasons to generated significant thermal and structural strains and in to generate residual and temporal stresses
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
