摘要
为了提高高温合金母合金锭的内在质量,本文提出了高温合金的真空电磁铸造技术,并建立了表示高温合金真空电磁铸造凝固过程中液态金属补缩能力的数学模型。利用该模型比较了K417高温合金真空电磁铸造和真空熔铸两种铸造方法凝固过程中液态金属补缩能力的强弱,并通过试验验证了数学模型计算结果的准确性。试验结果表明:在高温合金凝固过程中施加60 A5、0 Hz的电磁搅拌,可以大幅提高液态金属的补缩能力,使高温合金母合金锭中心缩松和缩孔的比率从54%降低到33%,因而大幅提高了高温合金母合金锭的利用率。
A novel model has been successfully developed to address the feeding capacity of melt in vacuum-electromagnetic casting. The model was tested with K417 super-alloy,and worked well. The experimental results show that the electromagnetic stirring, with an 50Hz current of 60 A, significantly increases the feeding capacity of liquid metal in vacuum casting and reduces the ratio of central shrinkage cavity in super-alloy ingots from 54% to 33%. So the utilization ratio of super-alloy master alloy ingots considerably increases.
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2007年第3期185-189,共5页
Chinese Journal of Vacuum Science and Technology
基金
国家自然科学基金项目(No.50474055)
关键词
数学模型
高温合金
真空电磁铸造
电磁搅拌补缩能力
Mathematical modeling, Superalloys, Vacuum-electromagnetic casting, Electromagnetic stirring, Feeding capacity
