1993 年 59 巻 8 号 p. 1288-1294
A computer simulation system is developed to estimate the heat affected zone (HAZ) of hypoeutectoid steel in surface grinding process. HAZ is generated by the liquid-solid phase transformation and solid state phase transformation caused by the grinding temperature. In the present system, the heat flow and phase transformation during grinding process is analyzed using a finitedifference method. The changes with the time of temperature distribution, the carbon redistribution in austenite, melting and the subsequent solidification to dendrite, and the quenching to martensite are simulated on the EWS. The analyzed results of the distributions of temperature, microstructure and carbon concentration are shown in the pseudocolor images on the display. The microstructure and the hardness in the heat-affected zone after the grinding process can be predicted. The present system can be applied to determine theoretically the best combination of the process variables for the grinding in advance.