Transactions of Materials and Heat Treatment

Title：Simulation study on grain distribution in hot forming for large-scale head

Authors： An Hongping Wu Jianguo Liu Lili

Unit： Taiyuan University of Science and Technology

KeyWords： large-scale head hot forming grains distribution non-uniform deformation variation coefficient

ClassificationCode：TG316

year,vol(issue):pagenumber：2023,48(11):7-14

Abstract：

Grain size and distribution are key factors affecting the service performances of large-scale forgings. Therefore, in order to explore the relationship between non-uniform deformation and grain distribution after hot deformation, the hot drawing of large-scale high-flange thick-walled heads for nuclear power pressure vessels was simulated and analyzed. Then, based on statistical concepts, the degree of non-uniform distribution of strain and grain in the head was characterized and analyzed by the variation coefficient, and the intuitive strain and grain state zoning diagram were established. On this basis, the functional relationship of the variation coefficients between strain and grain was determined, and combined with the large-scale head forming process, the rationality of this function was discussed from the perspective of metal flow and microstructure evolution. Thus, the research results provide certain reference for controlling the performances of forgings and improving the quality of products.

Funds：

山西省自然科学基金重点项目（201601D011002）;上海电机学院上海大件热制造工程技术研究中心开放课题（18DZ2253400）;太原科技大学博士科研启动基金项目（20212028）

作者简介：安红萍（1973-)，女，博士，副教授,E-mail：ellanfei@126.com

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