双辊薄带凝固组织中晶粒三维尺寸的表征

Token of Three-dimension Size of Grain in Microstructure of Twin-roll Thin Strip

双辊薄带凝固组织中柱状晶粒和等轴晶粒的尺寸大小对薄带的性能和行为有非常重要的影响 ,在薄带铸造过程中由于晶粒的生长具有三维特征 ,采用传统表征方法无法实现对薄带凝固组织中晶粒三维尺寸大小的表征 ,本文运用定量金相和概率论知识 ,在对晶粒形状作出合理假设的基础上 ,建立了双辊薄带凝固组织中柱状晶粒和等轴晶粒三维尺寸的表征表达式 ,实现了柱状晶粒和等轴晶粒三维生长特征的定量描述。

The property and behavior of twin roll thin strip is greatly affected by three dimension size of columnar and equiaxed crystal grains in the solidification structure of thin strip The growth of crystal grain has three dimension feature during casting process of thin strip, So the token of three dimension size of crystal grain cannot be realized by tradtional token method. On the basis of assumption to crystal grain shape, the token expression of three dimension size of columnar is established along with crystal grain in microstructure of twin roll thin strip according to quantitative metallurgical analysis and probability theory, And quantitative discription about three dimension growth feature of crystal grain in microstructure of twin roll thin strip is realized.