复合孕育对可锻铸铁件组织和性能的影响

Influences of Composite Inoculant on the Structure and Properties of Malleable Iron

在可锻铸铁件的生产过程中,采用稀土硼锑、铝及铋等进行孕育处理,可使其铸态组织得到细化,同时改善其石墨化效果,保证石墨细小、分布均匀,呈团絮或团球状形态,并且铸件的力学性能有较大幅度的提高。实验表明,稀土硼锑复合孕育剂的适宜加入量为0.25%。

The as cast structure of malleable iron were refined when the composite inoculant Re-B-S ＋ AI ＋ Bi was used. Besides, the graphitizing process also improved to insure the graphite in fine and evenly distributed and in quasi-spherical tempered shape. It was evident that the mechanics properties were improved markedly. The proper addition of Re-B-S is 0.25%.