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叙述了球铁钢锭模使用过程中热应力的测试方法及数据处理方法，并根据屈服准则比较各测点应力与材料屈服强度极限值之差，分析出钢锭模宽面中下部产生屈服变形的可能性。指出应据此改进球铁钢锭模结构，以保证其各部位的σ０值均远小于相应的σ０．２值，从而延长钢锭模的使用寿命。
The test method and data processing method of thermal stress in the process of using ductile iron ingot mold are described. According to the yield criterion, the difference between the stress at each measuring point and the limit value of material yield strength is analyzed, and the possibility of yield deformation in the middle and lower part of ingot mold is analyzed Sex. It is pointed out that the structure of the ductile iron ingot should be improved accordingly to ensure that the σ0 values of all parts are far less than the corresponding values of σ0.2 so as to prolong the service life of the ingot mold.