大型高压阀体多向模锻成形工艺及晶粒组织演变预测

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关键词：大型高压阀体；4130钢；动态再结晶；多向模锻；晶粒组织演变中图分类号：TG316.3；TH134DOI：10.3969/j.issn.1004-132X.2026.03.021 开放科学（资源服务）标识码（OSID）：

Abstract： A multi-directional die forging forming processes would proposed for a 7-15K large gate valve bodies made of 413O steel，and the evolution of the internal microstructure of the forging processes was predicted by numerical simulation. Based on the true stress-strain data of 413O steels，dynamic recrystallization volume fraction and grain size models were constructed，the reliability of these models was validated through comparisons between the model predictions and metalographic experimental measurements， thecalibrated models were integrated into the finite element analysis software to simulate the multidirectional die forging processes of large high-pressure valve bodies.Based on the coupled analysis of temperature and strain fields，the evolution of microstructures in 413O steel valve body was systematicaly investigated，and two different methods for evaluating the homogeneity of grain structure were proposed for the fully recrystallized and incompletely recrystallzed regions. The results demonstrate that compared with conventional forging processes，the multi-directional die forging process may effectively enhance material plasticity，improve the mechanics properties ofthe forgings，and increase the uniformityofinternal deformations.

Key words： large high-pressure valve body； 413O steel;dynamic recrystalization；multi-directional die forging； grain structure evolution

0 引言

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