抄録
The effect of addition of Sn and rare earth element (REE) have been investigated by hardness, tensile and impact absorbed tests, microstructural analysis using optical, scanning electron and transmission electron microscopes (SEM, TEM). Values of hardness and ultimate tensile strength increased increasing with Sn contents upto 0.1 mass% with and without REE, while elongation and impact energy were decreased. Spheroidal graphite in alloys including REE and Sn became finer with increasing Sn contents, and the 0.6Sn alloy had a spheroidal graphite which has clear sphere with smooth surface as the same as alloys including Sb in our previous report. Spheroidal graphite in this study was also indexed as a graphite structure by SAED analysis.
