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采用热光弹法与有限元法，研究了３．０ｔ矩形弧边钢锭模模口角部厚度变化对钢锭模热应力分布的影响，并进行优化设计，使钢锭模的使用寿命提高１倍。
The influence of the change of the thickness of the corner of 3.0 t rectangular arc edge mold die on the thermal stress distribution of the ingot mold was studied by the thermo-optical bomb method and the finite element method. The optimization design was carried out to improve the service life of the ingot mold by one time.