研究論文
電磁かくはんによる9%Ni鋳鋼の粒界割れ防止
1987 年 59 巻 4 号 p. 205-210
詳細
1987 年 59 巻 4 号 p. 205-210
Molten 9%Ni cast steel being stirred electromagnetically was solidified in furan molds having cavities 100 and 150mm in thickness, and the steel containing Zr was solidified in the same manner in a mold having a cavity 90mm in thickness for preventing intergranular cracking. Both castings 90mm in thickness stirred and unstirred are insusceptible to cracking. Castings 100mm in thickness stirred are insusceptible to cracking, but those unstirred are susceptible. Fine cracking occurs both in castings 150mm in thickness stirred and unstirred. The fracture surface analysis shows that an embrittling solute significantly segregates toward grain boundaries and that electromagnetic stirring during solidification has an effect of moderating grain boundary segregation.
