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首页> 外文期刊>Journal of Materials Engineering and Performance >Dynamic Recrystallization and Grain Refinement of Fe-P-C-Si and Fe-P-C-Si-N Steels
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Dynamic Recrystallization and Grain Refinement of Fe-P-C-Si and Fe-P-C-Si-N Steels

机译：Fe-P-C-Si和Fe-P-C-Si-n钢的动态再结晶和晶粒细化

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摘要

Grain refinement is an effective technique to improve the mechanical properties of steels. In the present work, single-pass hot compression experiments have been conducted on two different compositions of high phosphorous steels to study the microstructural evolution and ferrite grain refinement at various strain rates and deformation temperatures, i.e., 0.01-10?s_(?1)and 750-1050?°C, respectively. Optical metallography has been employed to understand the physical processes that take place during hot deformation process. The results indicate that when these compositions of high phosphorous steels are worked at relatively low temperatures in the intercritical regions, a ferrite grain size of 5-7?μm is obtained. It is observed that the grain size decreases with an increase in strain rate and with the decrease in deformation temperature. Based on the values of stress exponent ( n ) obtained in the present work, dislocation creep is identified as the deformation mechanism. The activation energies for deformation of these two types of high phosphorous steels have been calculated. The effect of the alloying elements on the stress–strain curve, microstructure, and grain refinement has been discussed.
机译：晶粒细化是改善钢力学性能的有效技术。在本作本作中，已经在两种不同的高磷钢组合物上进行了单通热压缩实验，以研究各种应变速率和变形温度的微观结构演化和铁氧体晶粒细化，即0.01-10？S _（α1）分别为750-1050？°C。光学金属塑术已被用于理解在热变形过程中发生的物理过程。结果表明，当这些高磷钢的组合物在间临界区域的相对低温下工作时，获得5-7Ω·μm的铁氧体粒径。观察到晶粒尺寸随着应变率的增加和变形温度的降低而降低。基于本作工作中获得的应力指数（n）的值，鉴定错位蠕变作为变形机制。已经计算了用于变形这两种类型的高磷钢钢的激活能量。已经讨论了合金元素对应力 - 应变曲线，微观结构和晶粒细化的影响。

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