铸造2011，Vol.60Issue(1)：32-36,5.
旋转电磁场和孕育剂对K417高温合金铸件力学性能的影响
Effects of Rotary Electromagnetic Field and Inoculant on Mechanical Properties of K417 Superalloy Castings
摘要
Abstract
The average grain size of K417 superalloy casting could be refined to 95 μm and the proportion of equiaxed grains could be increased to 99％ by imposing rotary electromagnetic stirring after pouring melt to the shell mold with inoculant CoAl2O4.The effect of the grain refinement on the mechanical properties of K417 superalloy castings was investigated.The results show that at 650 ℃,the strength, plasticity and the low cycle fatigue properties of K417 superalloy can be improved significantly by the grain refinement.When the test temperature is increased from 20 ℃ to 650 ℃,the tensile strength and yield strength of K417 superalloy almost keep invariable.However, the plasticity is reduced.Within the total strain of 0.3％, the low cycle fatigue life of K417 superalloy is reduced obviously.关键词
旋转电磁场/孕育剂/高温合金/晶粒细化/拉伸性能/低周疲劳性能分类
矿业与冶金引用本文复制引用
金文中,范敏,李廷举,殷国茂..旋转电磁场和孕育剂对K417高温合金铸件力学性能的影响[J].铸造,2011,60(1):32-36,5.基金项目
国家自然科学基金项目(50474055). （50474055）
