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研究了三个 Fe-Ni-C 合金及三个工业用钢的奥氏体强化对 M_s 及 B_s 的影响。M_s 随着奥氏体屈服强度的增加而线性下降,而 B_s 和奥氏体强度之间无任何直接关系。统计结果表明。在合金元素和其他条件基本不变的前提下,奥氏体碳含量和贝氏体相变点(B_S~I 或B_S~C)无任何直接关系,而和马氏体相变点(M_s)之间存在着单词的反比关系。理论计算发现,三个Fe-Ni-C 合金的 B_s 与 D_C~γ和 D_(Fc)~γ成正比线性关系,求出这三个合金 TTT 度图上鼻部温的△G_ν及 D_(Fc)~γ,则它们的孕育期正比于 Feder 等对扩散型相变孕育期公式,说明鼻部温度时贝氏体孕育期受化学自由能差及 Fe 原子扩散的控制。
The effect of austenite strengthening on M_s and B_s of three Fe-Ni-C alloys and three industrial steels was studied. M_s decreases linearly with the increase of austenite yield strength, but there is no direct relationship between B_s and austenite strength. Statistics show that. Under the premise that the alloying elements and other conditions are basically the same, there is no direct relationship between the austenite carbon content and the bainite transformation point (B_S ~ I or B_S ~ C), and the martensitic transformation point (M_s) There is an inverse relationship between words. The theoretical calculation shows that the B_s of three Fe-Ni-C alloys is linearly proportional to D_C ~ γ and D_ (Fc) ~ γ, and the △ G_ν and D_ (Fc) ) ~ γ, then their incubation period is proportional to Feder and so on diffusion phase transition period formula, indicating nasal temperature bainitic incubation period by the difference of chemical free energy and Fe atom diffusion control.