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研究了水平连铸球墨铸铁型材的拉伸缺口强度。试验结果表明，该材料的拉伸缺口强度可以用光滑试件的拉伸性能和理论应力集中系数来计算。对该材料的强度设计提出了设计准则，同时对低延性材料的缺口强度设计提出理论指导。
The tensile notched strength of horizontal continuous casting ductile iron profiles was studied. The test results show that the tensile notched strength of the material can be calculated using the tensile properties of the smooth specimen and the theoretical stress concentration factor. The design criteria of the strength of the material are put forward, and theoretical guidance is provided for the design of the notch strength of low ductility materials.