Based on the statistics of large amount of data,a regression equation of the relationship between tensile strength and hardness of gray irons melted in medium frequency induction furnace was built.

• 对大量的测量数据进行了统计分析,建立了在中频感应电炉熔炼灰铸铁的生产条件下抗拉强度与硬度之间的回归方程。