冒口高度对大型锻造钢锭内部质量影响的数值模拟研究  

Numerical Simulation Research on the Influence of Riser Height on Inner Quality of Large Forging Ingot

作　　者：党卫东[1] 吴晓春[1] 闵永安[1] 汪宏斌[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《铸造技术》2010年第6期753-758,共6页Foundry Technology

基　　金：国家支撑计划课题"高品质模具钢锻材关键技术开发(2007BAE51B04)"

摘　　要：通过数值模拟研究冒口高度对45 t钢锭凝固过程和内部质量的影响,通过钢锭生产和钢锭模测温验证了模拟结果的合理性。模拟结果表明,对大型上注钢锭,冒口高度越高,心部疏松越小,但对钢锭本身温度场分布和偏析形成影响不大,凝固条件主要受钢锭本身结构的影响。This article researched the effect of different height riser on solidification process and inner quality of 45 ton ingot. The result was proved by ingot product and temperature measurement. The results show that increase riser height can reduce the flaws, while has a little effect on temperature distribution and segregation. Solidification condition is mainly influenced by configuration of ingot itself.

关 键 词：冒口 大型钢锭 凝固 疏松 数值模拟 

分 类 号：TG244.4[金属学及工艺—铸造]