Detection Of FATT Of Turbine Rotor Steel Using Potentiostatic Pulse Test

This paper is about the detection of FATT of turbine rotor steel using potentiostatic pulse test.Through orthogonal test at different conditions,the best electrochemical test conditions are obtained.The current is mensurated by Potentiostatic Pulse Test of turbine rotor steel 30Cr2MoV for lab-charged at different temperature under the best electrochemical test conditions.The total current density and the current density that have deducted charge current of the double-layer capacitance are taken separately as the electrochemistry parameters. Regard the temperature as an independent factor,multiple regression analysis is conducted considering some chemical composition and mechanical performance. The result showed electrochemistry parameters of the current density that have deducted charge current of the double-layer capacitance are better than that of the total current density,which enhance the precision of FATT.And the prediction error of the models obtained by multiple linear regression and genetic programming was within the scatter of±20℃,and achieved the international precision of the same method.