摘要
以ADC12铝合金压铸缸盖罩为研究对象,用模流分析软件MAGMAsoft为分析工具,讨论了不同的内浇口厚度下,熔融金属的流动分布情形及铝合金的凝固特性,预测了在填充过程中有可能发生缺陷的地方或现象。结果表明,不同的内浇口厚度对压铸的填充过程影响很大,会影响到空气压力的分布,内浇口薄处温差高、高压集中且内浇口附近存在高速冲刷,致使铸件产生热裂。内浇口厚度为2.0mm、浇注速度为50m/s时,其压力分布比较理想,卷气及气孔现象减少。
Flow distribution of liquid aluminum alloy and its solidification behavior in ADC12 aluminum alloy cam cover for automobile engine were simulated by MAFMA soft at different gate thickness to predict potential defect positions during filling process. The results reveal that gate thickness greatly affect the filling process and distribution of pressure. There exists large temperature-difference and centralized high pressure as well as high velocity impaction around thin-walled gate,resulting in the formation of hot crack. Pressure distribution,entrapped-gas and gas hole defects in the parts are acceptable in condition of gate with thickness of 2.0mm and filling at 50 m/s.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2010年第8期729-730,共2页
Special Casting & Nonferrous Alloys
基金
盐城工学院校级经费资助项目(XKR2010015)
