大型铸钢件缩孔缩松模拟计算临界值确定研究  

Study on the Threshold Value of Simulated Shrinkage Porosity for a Large Steel Casting

作　　者：赵晓光 肖志霞 郭建政 

机构地区：[1]中国第一重型机械股份公司能源装备材料科学研究所,天津300457

出　　处：《铸造》2015年第5期425-429,共5页Foundry

摘　　要：为了建立模拟计算中缩孔缩松判据与实际缺陷尺寸之间的对应关系,利用Pro CAST软件最新缩孔缩松判据对铸钢试板(1 200 mm×800 mm×100 mm)凝固缺陷进行了预测,并与实际探伤结果进行了比较。计算结果表明,铸件凝固过程的自然对流对预测的缺陷位置影响非常显著。考虑自然对流后,比较模拟计算结果与无损检测结果发现,缩孔缩松临界值取0.15%,可与高能射线探伤精度为Φ2 mm的缺陷尺寸相当。该临界值可为后续的模拟计算提供非常有价值的参考。In order to establish the relationship between the threshold value of simulated shrinkage porosity and the measurement defects size, commercial casting software, Pro CAST, is used to simulate the solidification of a steel casting plate（1 200 mm ×800 mm ×100 mm）. The simulation results show that natural convection calculation is very important during the solidification simulation for such large castings. Based on the non-destructive testing, it is found that shrinkage value of 0.15% in Pro CAST simulation corresponds to Φ2 mm shrinkage defects in high-energy radiation detection accuracy. This threshold value may provide a very valuable reference for subsequent simulation.

关 键 词：大型铸钢件 模拟计算 缩孔缩松判据 

分 类 号：TG260[金属学及工艺—铸造]