Prediction of C/Cr amount and mechanical properties of high chromium cast iron using thermal analysis technique

The detection of C and Cr elements in the production process of high chromium cast iron mainly uses spectrometer. These instruments are expensive and have a long detection time. In this study, the relationship between the characteristic values of the cooling curve and the chemical composition of high-chromium cast iron with a C amount range of 3.63-3.94% and a Cr amount range of 15.17-26.64% was investigated. The mathematical regression formulas for predicting C/Cr amount and mechanical properties were established by SPSS software. The results show that the mathematical regression formula between C amount and temperature characteristic value is C% = -0.00668TL + 0.00162TE + 10.0867. For sub-eutectic high chromium cast iron, the mathematical regression formula between Cr amount and temperature characteristic value is Cr% = -0.04928TL + 0.16223TE - 117.0489. For eutectic high chromium cast iron, the mathematical regression formula is Cr% = 0.2238TL - 258.0879. Mathematical regression model between toughness, hardness and various temperature characteristic values are ak = 0.06075TL + 0.09318TE - 43.296 and HRC = -0.40779TL + 0.32379TE + 165.527.