在实验室条件下对中锰球铁磨球的成分、 组织和性能进行了试验研究；
The Compositions, structures and properties of medium manganese S. G. iron grinding balls were investigated under conditions of laboratory.
通过选择合适的化学成分，适当提高锰的含量，并采用合理的孕育和热处理工艺，所获得的中硅锰钼球铁高温硬度比中硅钼球铁提高33%。
By designing composition, adopting rational inoculation and heat treatment process, the elevated temperature hardness of Si-Mn-Mo were 33% more than Si-Mo alloyed ductile iron.
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