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在对解剖后的234t2.25Cr1Mo0.25V钢锭内夹杂物进行检测的基础上,根据夹杂物的尺寸及其在钢锭内的分布状况建立了热镦粗过程的有限元分析模型,采用宏、细观联合模拟方法研究镦粗过程中大型钢锭内夹杂物分布对基体损伤演化的影响。结果表明当镦粗压下率εh≤30%时,心部夹杂引起的损伤最严重;当εh>30%时,位于宏观剪切带上的夹杂引起的损伤较严重,随变形进行高危损伤区呈现明显的集中化。至镦粗结束时,损伤最有可能出现在坯料心部的一个片状区域内以及由宏观剪切带组成的锥面上。
Based on the detection of the inclusions in the 234t2.25Cr1Mo0.25V steel ingot after the anatomy, the finite element analysis model of the hot upsetting process was established according to the size of inclusions and the distribution in the steel ingot. The Effect of Inclusion Distribution in Large Ingot on Damage and Damage of Matrix in Upsetting Process by Joint Simulation Method. The results show that the damage caused by the heart inclusion is the most serious when the upsetting reduction rate εh≤30%. When εh> 30%, the inclusions located on the macroscopically shearing zone are more serious, Showing a clear focus. By the end of the upsetting, the damage is most likely to occur in a flake area of the core of the blank and on the conical surface consisting of macroscopic shear bands.