采用ＣＥ为３．７０％～４．０７％成分铁液，在实验室比较了７５ＳｉＦｅ、ＲＥＣａ和ＲＥＣａＢａ系孕育剂对灰铸铁强度和组织性能的影响。结果发现，改善断面敏感性主要在于解决薄断面（如壁厚５ｍｍ）的石墨化问题。含ＲＥ、Ｃａ、Ｂａ的１＃孕育剂有良好的石墨化能力，可改善断面敏感性和显微组织的均匀性。将１＃孕育剂用于ＱＢ６１０５柴油机缸体铸件的生产取得了良好的效果 The effects of 75SiFe, RECa and RECaBa inoculants on the strength and microstructure of gray cast iron were compared in laboratory using the liquid iron with CE of 3.70% -4.07%. The results show that improving the sensitivity of the cross section mainly lies in solving the problem of graphitization of the thin section (for example, a wall thickness of 5 mm). 1 # inoculant containing RE, Ca, Ba has good graphitization ability, can improve cross-sectional sensitivity and microstructure uniformity. 1 # inoculant used for QB6105 diesel engine cylinder casting production has achieved good results