10CrMnMoSi双相钢临界区淬火组织的电子结构参数及强度计算

Caculation of electronic structure parameters and strength of 10CrMnMoSi dual-phase steel after subcritical quenching

基于固体及分子经验电子理论(EET),计算了10CrMnMoSi双相钢经临界区淬火后的组织特征相的电子结构参数,包括特征相最强键共价键上的共价电子数的统计值n_A',相界面间电子密度差Δρ和满足界面连续的原子状态组数σ。结合双相钢的强化方式,进一步提出了双相钢强度的计算模型及方法。计算结果表明,790℃淬火后,10CrMnMoSi钢抗拉强度的计算值为657.1101 MPa,屈服强度为386.5286 MPa,与试验数据的误差分别为9.74%、5.90%,计算结果与试验结果的吻合度高。

The electronic structure parameters of subcritically quenched 10CrMnMoSi steel were analyzed by the empirical electron theory of solid and molecule（ EET）,including the statistical n＇Aof covalent electron pairs on the strongest covalent bond,the electron density difference Δρ on the phase interface,and the number of atomic state σ which meet the continuity interface conditions. Combining with the dual phase steel strengthening methods,a new computational model and method were put forward to calculate the strength of 10CrMnMoSi steel. The calculation results show that,after quenching at 790 ℃,the tensile strength of 10CrMnMoSi steel is 657. 1101 MPa,while the yield strength is 386. 5286 MPa,compared to the experimental data,the calculated results are of high accuracy,the errors are 9. 74%,5. 90%,respectively.