中文摘要：

一个阶段和方向性地为包晶体的合金使用的微观结构选择地图在传送对流状况下面团结了被介绍，它基于成核，宪政的 undercooling 标准(NCU 标准) ，和最高的接口温度标准。这张选择地图显示出在阶段 / 微观结构之间的关系， G/V 比率(G 是温度坡度， V 是生长速度) ，并且在不同传送对流紧张和成核下面的合金作文 undercoolings。从方向性的团结与结果作比较 SnCd 包晶体的合金试验，这张选择地图通常与试验性的结果一致。

英文摘要：

A phase and microstructure selection map used for peritectic alloy directionally solidified under convection condition was presented,which is based on the nucleation,constitutional undercooling criterion（NCU criterion）,and the highest interface temperature criterion.This selection map shows the relationships between the phase/microstructure,the G/V ratio（G is the temperature gradient,V is the growth velocity）,and the alloy composition under different convection intensities and nucleation undercoolings.Comparing with the results from directional solidification experiments of Sn–Cd peritectic alloys,this selection map was generally in agreement with the experimental results.