基于凝固过程电导率变化的球墨铸铁球化效果预测方法及装置OACSTPCD

Graphite morphology has an important influence on the mechanical properties of cast iron.Rapid prediction of graphite morphology of cast iron in front of the furnace is significant to improve the quality and production efficiency of castings.In this paper,based on the principle of electromagnetic induction,a method and device for predicting the graphite morphology of cast iron based on the resistivity monitoring of solidification process are designed.A circular sample and an electromagnetic signal sensor are used to obtain the resistivity and temperature gnals in melt solidification process at the same time,and the graphite morphology is evaluated by electromagnetic parameters.The prediction device includes cast iron melt sampler,electromagnetic signal sensor,high-speed signal acquisition module,FPGA signal processing module and other hardware units.The software is programmed in Verilog language.The correlation model between graphite morphology and electromagnetic parameters of cast iron was established by experiments.