Numerical Simulation of PC Steel Bar Induction Heating Process

Abstract

Based on electromagnetic and temperature field models of nonlinear ferromagnetic materials, this paper conducts a finite element analysis of the induction heating process of PC steel bar, thus obtaining the change curves of temperature, active power, heating efficiency and power density. The main factors and mechanisms affecting the heating efficiency and the temperature uniformity are analyzed systematically by a combination of the simulation result and the experimental fact. This work is expected to contribute significantly for optimizing the key parameters of induction heating production of PC steel bar.

On the correlation among ultra-fast quenching, retained ferrite content and strengthening mechanism in PC steel bars

“…Zhao Q Z simulated that the temperature rising in the core of the steel bar lagged behind the surface. In the later stage of heating, the maximum temperature difference between the core and surface can reach up to 70℃, which leads to the possibility of residual ferrite remaining in the core of the steel bar [5][6][7]. Some literature shows that in the process of induction heating, the slow diffusion of elements makes the carbon concentration in austenite unevenly distributed, the periodic distribution of carbon appears in the prior pearlite, and the austenite carbon poor area is formed in the prior ferrite area [8,9].…”