The percentage of RE in the matrix increases with the increase of solidification rate;the carbides in directional solidification microstructure are refined by RE added in high chromium cast iro...

• 稀土对高铬铸铁定向凝固组织中的碳化物具有细化作用,并随凝固速度的增加,定向凝固高铬铸铁组织细化程度提高,同时稀土的加入使高铬铸铁的抗拉强度明显提高。