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对充分固溶及时效处理的铁硅合金Fe-3%Si-Mn-S在室温下进行了不同应变量的压缩变形,应用EBSD技术测定了样品中各形变晶粒的取向,以及利用SEM观测了各晶粒内部MnS析出粒子的形貌、尺寸及分布特征,探讨形变对MnS粒子析出行为的影响规律。结果表明:1)相同应变量下,不同取向晶粒内粒子析出存在差异,且随变形量增加,粒子尺寸变化率从1.6%逐步增加至62.4%,晶粒取向影响显著;2)随变形量增加,析出粒子的平均尺寸有明显起伏,而粒子面积百分量与粒子平均尺寸变化趋势呈反比;3)粒子被位错切碎同时有粒子形核析出;大粒子熟化与第二相粒子回溶同时存在。
The Fe-3% Si-Mn-S alloy with Fe-3% Si-Mn-S was treated by compressive deformation with different strain at room temperature. The orientation of each deformed grain in the sample was measured by EBSD technique. The morphology, size and distribution characteristics of MnS precipitated particles in each grain were studied, and the influence of deformation on the precipitation behavior of MnS particles was discussed. The results show that: 1) the particles in different orientated grains have different precipitates at the same strain level, and the grain size change rate gradually increases from 1.6% to 62.4% with the increase of deformation amount, and grain orientation has a significant effect; 2) Increase, the average size of the precipitated particles have obvious ups and downs, and the area percentage of the particles is inversely proportional to the trend of the average size of the particles; 3) the particles are dislocated and disintegrated while the nuclei of the particles precipitate; simultaneously exist.