The solidification process of castings is prone to shrinkage porosity and macroscopic segregation defects. Utilizing a reduction technique to control the defects in the solidification process of castings is an effective method. In order to investigate the influence mechanism of reduction technology on the reduction-induced deformation at different positions during the solidification process of castings and the impact on the density of solidification structure, laboratory experiments on the reduction-induced deformation of steel ingots during solidification were conducted. Corresponding finite element numerical simulations were performed, and micro-CT detection was employed to analyze the pore distribution of the ingots. It was found that reduction-induced deformation during the solidification can effectively enhance the density of steel ingots. This study also innovatively introduces the concept of relative deformation displacement and reduction-induced deformation transfer coefficient, providing a measure of the actual compression deformation at different positions in the steel ingot during the reduction-induced deformation process. When the fraction solid is less than 0.70, the reduction-induced deformation transfer coefficient is ranging between 1.1 and 1.2. However, when the fraction solid is greater than 0.75, the reduction-induced deformation transfer coefficient rapidly decreases with an increase in the fraction solid until it reaches zero.

铸件凝固过程中容易产生缩松和宏观偏析缺陷。利用还原技术控制铸件凝固过程中的缺陷是一种有效的方法。为研究压下工艺对铸件凝固过程中不同位置压下变形的影响机理以及对凝固组织密度的影响，开展了钢锭凝固过程压下变形的室内实验。 。进行了相应的有限元数值模拟，并利用显微CT检测分析了铸锭的孔隙分布。研究发现，凝固过程中的还原诱导变形可以有效提高钢锭的密度。该研究还创新性地引入了相对变形位移和压下变形传递系数的概念，提供了钢锭压下变形过程中不同位置实际压缩变形的度量。当固相率小于0.70时，压下变形传递系数在1.1~1.2之间。然而，当固相率大于0.75时，压下变形传递系数随着固相率的增加而迅速减小，直至达到零。