铸造凝固过程宏观偏析数值模拟研究  

Researches on Macrosegregation Numerical Simulation during Cast Alloy Solidification Process

作　　者：涂武涛 沈厚发[1] 柳百成[1] 

机构地区：[1]清华大学材料加工系,北京100084

出　　处：《大型铸锻件》2014年第2期1-3,共3页Heavy Casting and Forging

基　　金：国家科技重大专项课题(2011ZX04014-131);国家重点基础研究发展计划项目(2011CB012900)的资助

摘　　要：宏观偏析普遍存在于铸造合金凝固过程中,严重影响了材料的使用性能。本文利用宏观偏析数学模型,分别对53 t钢锭和500 t铸件宏观偏析进行数值模拟研究。模型考虑了凝固收缩与等轴晶沉降,模拟结果和实验结果吻合较好。Macrosegregation usually occurs during the casting alloy solidification process , which greatly deteriorate the service material performance .In this paper , by means of the mathematic model , numerical simulation researches are conducted for the cast macrosegregation of 53 t and 500 t ingots .Solidification shrinkage and equiaxial crystal set-tlement are considered in the model , the simulation result is well consistent with the test results .

关 键 词：铸造凝固过程 宏观偏析 数值模拟 

分 类 号：TG249.4[金属学及工艺—铸造]