对铸型冷却速度、浇注温度、球化率和化学成分对辊身硬度的影响进行了论述，并提出了解决问题的措施。
The influences of cooling rate of the mould, pouring temperature, nodularity and chemical composition on hardness of roll body were described, and the measures for solve problems were proposed.
通过统计分析，研究了高珠光体含量球铁的基体硬度与球化率和珠光体含量的关系。
By statistical analysis, the relationship between the matrix hardness of the high pearlite-containing nodular iron and its nodularity and pearlite content was investigated.
结果表明，高珠光体含量球铁凸轮轴的洛氏硬度随着球化率和珠光体含量的升高而增加。
The result showed that the Rockwell hardness of the high pearlite-containing nodular iron camshaft increased with increasing of its nodularity and pearlite content.
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