This article studies the shrinkage porosity model for steel ingots with reduction deformation during solidification, and examines the effect of reduction deformation on the shrinkage porosity. Initial investigations involve conducting experiments on reduction deformation during steel ingot solidification, entailing laboratory‐based high‐temperature melting and jack reduction process, with a focus on diverse reduction amounts and cooling times before reduction. Post‐experimental procedures include sample sectioning, acid etching, and low‐magnification structural analysis. Following this, numerical simulations are employed to model the solidification and reduction deformation processes of the steel ingot. Ultimately, a shrinkage porosity criterion model is developed, integrating the equivalent plastic strain resulting from reduction deformation during solidification into the micro‐porosity criterion model. This approach facilitates the prediction of micro‐porosity distribution following reduction deformation. Findings reveal that the shrinkage porosity criterion G2L−5/3ε/εa, which includes the equivalent plastic strain coefficient, effectively predicts the distribution of micro‐porosity subsequent to reduction deformation during steel ingot solidification. A higher reduction amount during the solidification process corresponds to a lowered level of internal micro‐porosity.

中文翻译：

---

凝固过程中还原变形钢锭的缩松模型

本文研究了凝固过程中发生缩松变形的钢锭的缩松模型，考察了缩松变形对缩松的影响。初步研究包括对钢锭凝固过程中的还原变形进行实验，需要基于实验室的高温熔化和千斤顶还原过程，重点是不同的还原量和还原前的冷却时间。实验后程序包括样品切片、酸蚀刻和低倍结构分析。随后，采用数值模拟来模拟钢锭的凝固和还原变形过程。最终，开发了收缩孔隙率准则模型，将凝固过程中还原变形产生的等效塑性应变集成到微孔隙率准则模型中。这种方法有利于预测变形后的微孔隙率分布。研究结果表明，收缩孔隙度标准G2L−5/3ε/εA，其中包括等效塑性应变系数，有效预测钢锭凝固过程中还原变形后的微孔隙率分布。凝固过程中较高的还原量对应于较低水平的内部微孔隙率。