Research progress and prospects on the formation mechanism of macrosegregation and shrinkage porosity in large steel ingots

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Progress in Natural Science: Materials International Pub Date : 2024-06-01 DOI:10.1016/j.pnsc.2024.05.009

Xiang Liu, Chaojie Zhang, Shaowei Hu, Liqiang Zhang, Haichuan Wang

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Abstract

Macrosegregation and shrinkage porosity in large steel ingots are key factors restricting the homogenization of large cast and forged parts. Due to the complex mechanisms of their formation, they have always been challenging issues in the research on solidification control of large steel ingots. The purpose of this review is to systematically revisit the research progress on the mechanisms of macrosegregation and shrinkage porosity formation in large steel ingots, focusing on the mechanisms of formation of 'A' type segregation, positive segregation at the top, and negative segregation at the bottom, and their impact on the quality of steel ingots. At the same time, the conditions and influencing factors for the formation of shrinkage porosity are analyzed in detail, and the interaction between macrosegregation and shrinkage porosity during the solidification process of steel ingots is discussed. Based on existing research results and challenges, prospects for future research directions are proposed, emphasizing the development of high-precision numerical simulation techniques and experimental research methods to deeply understand the internal mechanisms of segregation and porosity formation, providing a scientific basis for formulating effective control strategies.

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大型钢锭中大偏析和缩孔形成机理的研究进展与展望

大型钢锭中的大偏析和缩孔是制约大型铸锻件均匀化的关键因素。由于其形成机理复杂，一直是大型钢锭凝固控制研究中的难题。本综述旨在系统回顾大型钢锭中大偏析和缩孔形成机理的研究进展，重点关注 "A "型偏析、顶部正偏析和底部负偏析的形成机理及其对钢锭质量的影响。同时，详细分析了收缩气孔形成的条件和影响因素，并讨论了钢锭凝固过程中宏观偏析和收缩气孔之间的相互作用。基于现有的研究成果和面临的挑战，对未来的研究方向进行了展望，强调发展高精度数值模拟技术和实验研究方法，深入理解偏析和气孔形成的内在机理，为制定有效的控制策略提供科学依据。

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来源期刊

Progress in Natural Science: Materials International 综合性期刊-综合性期刊

CiteScore

8.60

自引率

2.10%

发文量

2812

审稿时长

49 days

期刊介绍： Progress in Natural Science: Materials International provides scientists and engineers throughout the world with a central vehicle for the exchange and dissemination of basic theoretical studies and applied research of advanced materials. The emphasis is placed on original research, both analytical and experimental, which is of permanent interest to engineers and scientists, covering all aspects of new materials and technologies, such as, energy and environmental materials; advanced structural materials; advanced transportation materials, functional and electronic materials; nano-scale and amorphous materials; health and biological materials; materials modeling and simulation; materials characterization; and so on. The latest research achievements and innovative papers in basic theoretical studies and applied research of material science will be carefully selected and promptly reported. Thus, the aim of this Journal is to serve the global materials science and technology community with the latest research findings. As a service to readers, an international bibliography of recent publications in advanced materials is published bimonthly.