Study on the cladding path during the solidification process of multi-layer cladding of large steel ingots

IF 1.6 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY High Temperature Materials and Processes Pub Date : 2023-01-01 DOI:10.1515/htmp-2022-0267

Li Yi-hong, Ni Jin-Yu, Zhao Yu-kun, He Yi-bo, Ren Zhi-feng, Chen Hui-qin

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Abstract

Abstract Aiming at the quality problems such as segregation, porosity and shrinkage cavities that are difficult to eliminate due to the size effect of large die-cast steel ingots as large forging blanks, the idea of layered casting of large steel ingots is proposed. The transient heat transfer process and cladding path of the ingot core and cladding layer under different molten steel casting temperatures, different ingot core diameters and different ingot core preheating temperatures were studied by combining numerical simulation and thermal experiments. The research results show that the cladding path has a certain functional relationship with the diameter of the ingot core and the preheating temperature of the ingot core. Obviously, the interfacial melting rate can be significantly improved. The thermal scaling experiment was carried out on the cladding path under the condition of a casting temperature of 1,560°C and no preheating of the ingot core. The microhardness of the interface is higher than that of the clad steel ingot, and the metallurgical bond of the interface is good.

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大型钢锭多层熔覆凝固过程中熔覆路径的研究

摘要针对大型压铸钢锭作为大型锻件由于尺寸效应而难以消除的偏析、气孔和缩孔等质量问题，提出了大型钢锭分层铸造的思想。采用数值模拟与热实验相结合的方法，研究了不同铸钢液温度、不同钢芯直径和不同钢芯预热温度下，钢芯和熔覆层的瞬态传热过程和熔覆路径。研究结果表明，熔覆路径与钢芯直径和钢芯预热温度有一定的函数关系。显然，可以显著提高界面熔化速率。在浇注温度为1560℃、钢锭芯不预热的条件下，对熔覆路径进行了热结垢实验。界面显微硬度高于包钢锭，界面的冶金结合良好。

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来源期刊

High Temperature Materials and Processes 工程技术-材料科学：综合

CiteScore

2.50

自引率

0.00%

发文量

审稿时长

3.9 months

期刊介绍： High Temperature Materials and Processes offers an international publication forum for new ideas, insights and results related to high-temperature materials and processes in science and technology. The journal publishes original research papers and short communications addressing topics at the forefront of high-temperature materials research including processing of various materials at high temperatures. Occasionally, reviews of a specific topic are included. The journal also publishes special issues featuring ongoing research programs as well as symposia of high-temperature materials and processes, and other related research activities. Emphasis is placed on the multi-disciplinary nature of high-temperature materials and processes for various materials in a variety of states. Such a nature of the journal will help readers who wish to become acquainted with related subjects by obtaining information of various aspects of high-temperature materials research. The increasing spread of information on these subjects will also help to shed light on relevant topics of high-temperature materials and processes outside of readers’ own core specialties.