摘要
以低压铸造成形ZL205A合金壳体件作为研究对象,采用数值模拟方法,研究了壳体铸件低压铸造过程温度场及缩孔、缩松缺陷随工艺方案的变化规律。结果表明,采用冷铁及冒口,缝隙式浇口由8个增加到10个,补缩距离由200mm减小到157mm,铸件的温度场分布合理,铸件缺陷部位的缩松倾向明显减小,模拟结果与试验结果对比,表明采用冒口结合冷铁的工艺方案合理可行。
The temperature field,shrinkage porosity（hole） in the ZL205A alloy shell castings during low pressure casting process were visualized through numerical simulation.The results show that the desirable temperature filed can be obtained and tendency of shrinkage porosity in the defect location of the shell can be reduced by using the chill and riser,adding the number of slit runners from eight to ten and decreasing the length of feeding distance from 200 mm to 157 mm.Comparison with the experimental results indicates that the scheme of chill combining with riser is reasonable and feasible.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2012年第9期811-813,共3页
Special Casting & Nonferrous Alloys
基金
国家科技支撑计划重点项目(2011BAE21B02)
华中科技大学材料成形与模具技术国家重点实验室开放基金资助项目(09-04)
