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以键参数函数图为依据，选择部分变质剂在中铬铸铁上进行试验。结果发现，加入００１％到００２％的锌进行变质处理，中铬铸铁可以得到较好的碳化物分布形态和较好的抗冲击磨损性能。证明了用键参数函数选择变质剂的方法也适用于中铬铸铁的研究。
Based on the bond parameter function diagram, some modifiers were selected for testing on medium chromium cast iron. The results showed that adding 001% to 002% of zinc for modification, medium chromium castings can get better carbide distribution morphology and better impact and wear resistance. It is proved that the method of selecting modifier by the key parameter function is also suitable for the research of medium chromium cast iron.