The more pronounced ferrite refinement is achieved as carbon content increased. 碳含量提高有利于铁素体晶粒细化。
The nano-hardness of both GBF and IGF increased with the increase of carbon content, but IGF's varied little. 且随着碳含量的增高，晶界和晶内铁素体的纳米硬度都随之升高，但各实验钢中晶内铁素体的纳米硬度相差不大。
