Study of the Grain Refinement Technology by Electromagnetic Stirring for IN100 Superalloy Vacuum Investment Casting
The effects of rotating electromagnetic stirring and inoculants on the solidification structures and properties of IN100 superalloy vacuum investment casting was studied with XRD, SEM and optical microscope. The results show that by initiating the 50Hz, 150A rotating electromagnetic stirring as soon as the molten metal was poured into the mould, which was coated with inoculant CoAl2O4, the average equiaxed grain size of IN100 superalloy vacuum investment casting can be refined to 95μm and the fraction of equiaxed grains can be increased to 99 %. On condition that the grain size of K417 superalloy vacuum investment casting were refined to 95μm, the tensile properties at room temperature, the morphology of （γ＋γ′）eutectic and the morphology of dendrites can be greatly improved.
Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang
W. Z. Jin et al., "Study of the Grain Refinement Technology by Electromagnetic Stirring for IN100 Superalloy Vacuum Investment Casting", Advanced Materials Research, Vols. 189-193, pp. 3789-3794, 2011