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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。
Based on the solid and molecular empirical electron theory (EET), the electronic structure parameters of the phase of the 10CrMnMoSi duplex steel after quenching by the critical region were calculated, including the statistics of the number of covalent electrons on the covalent bond of the strongest bond in the phase n_A ’, The electron density difference Δρ between the phase interfaces, and the number of atomic state groups σ satisfying the interface continuity. Combined with the strengthening method of dual-phase steel, the calculation model and method of strength of dual-phase steel are further proposed. The calculated results show that the tensile strength of 10CrMnMoSi steel after quenching at 790 ℃ is 657.1101 MPa and the yield strength is 386.5286 MPa. The errors with the experimental data are 9.74% and 5.90%, respectively. The calculated results agree well with the experimental results.