摘要
针对自由晶粒阻塞流头的流头阻塞机制,推导出晶粒大小与合金流动性关系的数学模型。将适用于匀晶系及共晶系成份位于相图C_0≤k0C_E-角的合金成份与晶粒大小的关系式H代入此模型,得到了合金成份、结晶间隔与流动性的定性关系式。利用前人对共晶系合金所做的实验数据验证表明,这些模型适用于共晶系合金。
A methcmatical model of grain size affacting the fluidity of liquid alloys is derived based on the mechanism of chock-off at the tip of advancing stream owing to independent crystallisation. Connected the model with H, two fomulas of alloy composition, freezing range, fluidity are got out. The parameter H is used for evaluating the ability of grain refinement of alloying elements, and shows the relation between the composition at the phase diagram corner, C0<k0 CE, and grain size.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
1989年第4期312-317,共6页
Journal of University of Science and Technology Beijing
关键词
合金
流动性
数学模型
晶粒尺寸
fluidity, grain size, freezing range, alloy composition, mathematical models
