Assessment of the effect of the steels structure dispersion on its magnetic and mechanical properties

OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 23 No. 4 2021 Fig. 8. The value of the grain size factor Fz depending on the value of internal stresses (stresses of the second kind) for heat-treated samples made of structural steels Fig. 9. The value of the factor of different grain size Fz depending on the logarithm of the ultimate strength value for heat-treated specimens made of structural steels In this case, the equation characterizing the linear regression model is: . Y aX   = +  (2) In this case, ε = 0.014. ε shows how large the error of predicting one value from another is. In the dia- gram, the prediction limits based on the ε -value are de fi ned as: 2 , i G Y  =   (3) where i Y  is the predicted value of Y .