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本文对双相钢中混合物定律的适用性及其与微观组织特征的关系进行了研究。结果指出,在一级近似下,双相钢的强度是马氏体体积分数的线性函数,而与马氏体中碳含量无关,是随退火温度升高、马氏体的体积分数增加、马氏体的硬度下降、铁素体硬度升高的综合结果。双相钢中的混合物定律为:式中λ是小于1的常数。λ受马氏体的硬度、早期失效、铁素体硬化等因素影响,以此公式容易解释按混合物定律计算的双相钢强度值和实测值之间的偏离。
In this paper, the applicability of the law of mixtures in dual-phase steels and the relationship between them and the microstructure characteristics were studied. The results show that in the first approximation, the strength of dual phase steel is a linear function of the volume fraction of martensite, and has nothing to do with the carbon content of martensite, with the annealing temperature increases, the volume fraction of martensite increases, the horse The hardness of the body decreased, the overall result of increased ferrite hardness. The law of mixtures in duplex steels is: where λ is a constant less than one. λ is affected by martensite hardness, early failure, ferrite hardening and other factors. This formula easily explains the deviation between the intensity and the measured value of the duplex steel calculated by the law of mixtures.