铸态316LN钢平面压缩过程中的组织演变模拟

Simulation of Microstructure Evolution during Plane Compression of As-cast 316LN Steel

应用Deform-3D软件对铸态316LN奥氏体不锈钢平面压缩过程进行了数值模拟,研究了不同变形温度、不同压下量的铸态316LN组织演变规律。结果表明,当变形温度一定时,随着压下量的增加,动态再结晶体积分数增加,晶粒尺寸细化。当变形温度较低时,随着压下量增加,材料的晶粒变小,但仍以原始粗大晶粒为主。当变形温度升高时,再结晶程度增大,晶粒更容易得到细化。在1200℃时,较小的变形量下就可以获得细小的晶粒。

The plane compression process of as-cast 316 LN austenitic stainless steel was numerically simulated by using Deform-3 D software. The microstructure evolution of as-cast 316 LN with different deformation temperature and different reduction was studied. The results show that when the deformation temperature is constant, the dynamic recrystallization volume fraction increases and the grain size is refined with the increase of reduction amount. When the deformation temperature is low, with the increase of reduction amount, the grain size of the material becomes smaller, but it is still dominated by the original coarse grain. When the deformation temperature increases, the recrystallization degree increases and the grain is more easily refined. At 1200 ℃, fine grains can be obtained with a small amount of deformation.