试验结果表明，对于含Ｃｒ量００６％～０３０％的可锻铸铁，可以加入０２％～０２５％的ＢＺⅢ型变质剂来较好地解决石墨化退火困难的问题，且其力学性能明显改善（达到ＫＴ３００６的指标）。 The test results show that for the ductile iron containing 0  06% ~ 0  30% of Cr, BZⅢ modifier can be added from 02% to 025% to solve the difficulty of graphitization annealing. And its mechanical properties improved significantly (to KT300 6 indicators).