快速砂型铸造缸盖充型和凝固过程的数值模拟  

Simulation of Filling and Solidification of Rapid Sand Casting Engine Cylinder Head

作　　者：龚伟[1] 白朝中[1] 张翔[1] 

机构地区：[1]西南科技大学制造科学与工程学院

出　　处：《特种铸造及有色合金》2017年第7期726-729,共4页Special Casting & Nonferrous Alloys

基　　金：四川省科技支撑计划资助项目(2012GZX0083)

摘　　要：在发动机缸盖快速砂型铸造工艺流程和铸造工艺设计的基础上,利用ProCAST软件对金属液的充型和凝固过程进行数值模拟。结果表明,采用单侧底注式浇注系统能够实现顺利充型。在凝固阶段缸盖外壁最先凝固,接着是铸件内部凝固。冒口对缸盖上部的厚大部位补缩良好,内浇口对缸盖下端厚大部位实现了补缩。整个铸件没有形成明显的孤立液相区。铸件内部仅存在均匀分散的缩孔、缩松,且孔隙度总体上小于10%,铸件质量良好。Based on introduction of the processing procedure of rapid sand casting engine cylinder head and its casting process design, filling and solidification of liquid aluminium alloy were visualized by the ProCAST software. The simulated results reveal that the smooth filling can be realized by one-side bot- tom gating system. During the solidification process, the outer wall of cylinder head is solidified ahead, and then the inner casting. Satisfied feeding effect of risers on large thick parts of upper part of work- piece wall and ingates on bottom part of workpiece wall can be realzied, respectively. Absence of isolated liquid region in the casting can be observed. The inner cylinder head has only the uniformly dispersed shrinkage porosity（hole）, and the porosity is less than 10%, exhibiting excellent casting quality.

关 键 词：发动机缸盖 数值模拟 PROCAST软件 充型凝固 

分 类 号：TG292[金属学及工艺—铸造]