基于典型曲面结构铸件凝固过程收缩量的模拟研究  

The Simulation of Cast Solidification Shrinkage Based on the Typical Surface Structure

作　　者：陈丙熹[1] 袁晓光[1] 曹阳[1,2] 黄宏军[1] 郑文涛[1] 

机构地区：[1]沈阳工业大学材料科学与工程学院,辽宁沈阳110870 [2]沈阳铸造研究所,辽宁沈阳110022

出　　处：《铸造》2014年第2期152-155,共4页Foundry

基　　金：沈阳市工业科技攻关项目(F12-008-2-00)

摘　　要：为模拟铸造过程中铸件的受阻收缩问题,开发了基于ANSYS的铸造过程热应力双向耦合模拟系统。设定铸件材质以及铸型材质的物理参数随温度变化而变化,采用接触单元处理铸件-铸型间的相互作用,实现了温度场与应力场的耦合。通过模拟具有典型曲面结构的铸件,发现铸件在凝固过程中的收缩量不仅与铸件的材质有关,还与铸件的凝固速度成反比,凝固速度越快,铸件收缩量越小;凝固速度越慢,铸件收缩量越大。The casting process thermal stress two-way coupling system has been developed based on ANSYS system, to simulate the hindered shrinkage problems of castings in the process of casting. It has been set that the physical parameters of the casting and mould material change with temperature, the contract unit has been used to handle the interaction between casting and mould material for the realization of temperature and stress field influence coupling each other. The results show that the casting shrinkage is not only related to the casting material but also be inversely proportional to the solidification rate by simulating typical surface structure casting. In solidification process the faster the solidification rate is, the smaller the casting shrinkage will be; the slower the solidification rate is, the bigger the casting shrinkage will be.

关 键 词：受阻收缩 应力场 

分 类 号：TG244.3[金属学及工艺—铸造]