Calculation of the yield and tensile strength in the alloying non quenched-tempered steel by the electron structure parameters

摘要

Based on the phase transformations and strengthening mechanisms during rolling, the strength increments △ρb under different strengthening mechanisms are calculated with the covalent electron number n A of the strongest bond in phase cells of alloysand the interface electron density difference △ρ matching the interface stress in alloys. The calculation method of the finishing rolling yield strength is proposed, and it is integrated with the proposed calculation formulas of strength of non quenched-tempered steel. Therefore, the general formulas to simultaneously calculate both the finishing rolling strength and the yield strength of the continuous casting-rolling and non quenched-tempered steel are given. Taken the pipeline steel X70 as an example, the predictions of properties and technological parameters are performed before production or online.